speeduino/speeduino/decoders.cpp

#define MJR 1

/*
Speeduino - Simple engine management for the Arduino Mega 2560 platform
Copyright (C) Josh Stewart
A full copy of the license may be found in the projects root directory
*/

/** @file
 * 
 * Crank and Cam decoders
 * 
 * This file contains the various crank and cam wheel decoder functions.
 * Each decoder must have the following 4 functions (Where xxxx is the decoder name):
 * 
 * - **triggerSetup_xxxx** - Called once from within setup() and configures any required variables
 * - **triggerPri_xxxx** - Called each time the primary (No. 1) crank/cam signal is triggered (Called as an interrupt, so variables must be declared volatile)
 * - **triggerSec_xxxx** - Called each time the secondary (No. 2) crank/cam signal is triggered (Called as an interrupt, so variables must be declared volatile)
 * - **getRPM_xxxx** - Returns the current RPM, as calculated by the decoder
 * - **getCrankAngle_xxxx** - Returns the current crank angle, as calculated by the decoder
 * - **getCamAngle_xxxx** - Returns the current CAM angle, as calculated by the decoder
 *
 * Each decoder must utilise at least the following variables:
 * 
 * - toothLastToothTime - The time (In uS) that the last primary tooth was 'seen'
 */

/* Notes on Doxygen Groups/Modules documentation style:
 * - Installing doxygen (e.g. Ubuntu) via pkg mgr: sudo apt-get install doxygen graphviz
 * - @defgroup tag name/description becomes the short name on (Doxygen) "Modules" page
 * - Relying on JAVADOC_AUTOBRIEF (in Doxyfile, essentially automatic @brief), the first sentence (ending with period) becomes
 *   the longer description (second column following name) on (Doxygen) "Modules" page (old Desc: ... could be this sentence)
 * - All the content after first sentence (like old Note:...) is visible on the page linked from the name (1st col) on "Modules" page
 * - To group all decoders together add 1) @defgroup dec Decoders (on top) and 2) "@ingroup dec" to each decoder (under @defgroup)
 * - To compare Speeduino Doxyfile to default config, do: `doxygen -g Doxyfile.default ; diff Doxyfile.default Doxyfile`
 */
#include <limits.h>
#include "globals.h"
#include "decoders.h"
#include "scheduledIO.h"
#include "scheduler.h"
#include "crankMaths.h"
#include "timers.h"
#include "schedule_calcs.h"

void nullTriggerHandler (void){return;} //initialisation function for triggerhandlers, does exactly nothing
uint16_t nullGetRPM(void){return 0;} //initialisation function for getRpm, returns safe value of 0
int nullGetCrankAngle(void){return 0;} //initialisation function for getCrankAngle, returns safe value of 0

void (*triggerHandler)(void) = nullTriggerHandler; ///Pointer for the trigger function (Gets pointed to the relevant decoder)
void (*triggerSecondaryHandler)(void) = nullTriggerHandler; ///Pointer for the secondary trigger function (Gets pointed to the relevant decoder)
void (*triggerTertiaryHandler)(void) = nullTriggerHandler; ///Pointer for the tertiary trigger function (Gets pointed to the relevant decoder)
uint16_t (*getRPM)(void) = nullGetRPM; ///Pointer to the getRPM function (Gets pointed to the relevant decoder)
int (*getCrankAngle)(void) = nullGetCrankAngle; ///Pointer to the getCrank Angle function (Gets pointed to the relevant decoder)
void (*triggerSetEndTeeth)(void) = triggerSetEndTeeth_missingTooth; ///Pointer to the triggerSetEndTeeth function of each decoder

static void triggerRoverMEMSCommon(void);
static inline void triggerRecordVVT1Angle (void);

volatile unsigned long curTime;
volatile unsigned long curGap;
volatile unsigned long curTime2;
volatile unsigned long curGap2;
volatile unsigned long curTime3;
volatile unsigned long curGap3;
volatile unsigned long lastGap;
volatile unsigned long targetGap;

unsigned long MAX_STALL_TIME = MICROS_PER_SEC/2U; //The maximum time (in uS) that the system will continue to function before the engine is considered stalled/stopped. This is unique to each decoder, depending on the number of teeth etc. 500000 (half a second) is used as the default value, most decoders will be much less.
volatile uint16_t toothCurrentCount = 0; //The current number of teeth (Once sync has been achieved, this can never actually be 0
volatile byte toothSystemCount = 0; //Used for decoders such as Audi 135 where not every tooth is used for calculating crank angle. This variable stores the actual number of teeth, not the number being used to calculate crank angle
volatile unsigned long toothSystemLastToothTime = 0; //As below, but used for decoders where not every tooth count is used for calculation
volatile unsigned long toothLastToothTime = 0; //The time (micros()) that the last tooth was registered
volatile unsigned long toothLastSecToothTime = 0; //The time (micros()) that the last tooth was registered on the secondary input
volatile unsigned long toothLastThirdToothTime = 0; //The time (micros()) that the last tooth was registered on the second cam input
volatile unsigned long toothLastMinusOneToothTime = 0; //The time (micros()) that the tooth before the last tooth was registered
volatile unsigned long toothLastMinusOneSecToothTime = 0; //The time (micros()) that the tooth before the last tooth was registered on secondary input
volatile unsigned long toothLastToothRisingTime = 0; //The time (micros()) that the last tooth rose (used by special decoders to determine missing teeth polarity)
volatile unsigned long toothLastSecToothRisingTime = 0; //The time (micros()) that the last tooth rose on the secondary input (used by special decoders to determine missing teeth polarity)
volatile unsigned long targetGap2;
volatile unsigned long targetGap3;
volatile unsigned long toothOneTime = 0; //The time (micros()) that tooth 1 last triggered
volatile unsigned long toothOneMinusOneTime = 0; //The 2nd to last time (micros()) that tooth 1 last triggered
volatile bool revolutionOne = 0; // For sequential operation, this tracks whether the current revolution is 1 or 2 (not 1)
volatile bool revolutionLastOne = 0; // used to identify in the rover pattern which has a non unique primary trigger something unique - has the secondary tooth changed.

volatile unsigned int secondaryToothCount; //Used for identifying the current secondary (Usually cam) tooth for patterns with multiple secondary teeth
volatile unsigned int secondaryLastToothCount = 0; // used to identify in the rover pattern which has a non unique primary trigger something unique - has the secondary tooth changed.
volatile unsigned long secondaryLastToothTime = 0; //The time (micros()) that the last tooth was registered (Cam input)
volatile unsigned long secondaryLastToothTime1 = 0; //The time (micros()) that the last tooth was registered (Cam input)

volatile unsigned int thirdToothCount; //Used for identifying the current third (Usually exhaust cam - used for VVT2) tooth for patterns with multiple secondary teeth
volatile unsigned long thirdLastToothTime = 0; //The time (micros()) that the last tooth was registered (Cam input)
volatile unsigned long thirdLastToothTime1 = 0; //The time (micros()) that the last tooth was registered (Cam input)

uint16_t triggerActualTeeth;
volatile unsigned long triggerFilterTime; // The shortest time (in uS) that pulses will be accepted (Used for debounce filtering)
volatile unsigned long triggerSecFilterTime; // The shortest time (in uS) that pulses will be accepted (Used for debounce filtering) for the secondary input
volatile unsigned long triggerThirdFilterTime; // The shortest time (in uS) that pulses will be accepted (Used for debounce filtering) for the Third input

volatile uint8_t decoderState = 0;

UQ24X8_t microsPerDegree;
UQ1X15_t degreesPerMicro;

unsigned int triggerSecFilterTime_duration; // The shortest valid time (in uS) pulse DURATION
volatile uint16_t triggerToothAngle; //The number of crank degrees that elapse per tooth
byte checkSyncToothCount; //How many teeth must've been seen on this revolution before we try to confirm sync (Useful for missing tooth type decoders)
unsigned long elapsedTime;
unsigned long lastCrankAngleCalc;
unsigned long lastVVTtime; //The time between the vvt reference pulse and the last crank pulse

uint16_t ignition1EndTooth = 0;
uint16_t ignition2EndTooth = 0;
uint16_t ignition3EndTooth = 0;
uint16_t ignition4EndTooth = 0;
uint16_t ignition5EndTooth = 0;
uint16_t ignition6EndTooth = 0;
uint16_t ignition7EndTooth = 0;
uint16_t ignition8EndTooth = 0;

int16_t toothAngles[24]; //An array for storing fixed tooth angles. Currently sized at 24 for the GM 24X decoder, but may grow later if there are other decoders that use this style

#ifdef USE_LIBDIVIDE
#include "src/libdivide/libdivide.h"
static libdivide::libdivide_s16_t divTriggerToothAngle;
#endif

/** Universal (shared between decoders) decoder routines.
*
* @defgroup dec_uni Universal Decoder Routines
* 
* @{
*/
// whichTooth - 0 for Primary (Crank), 1 for Secondary (Cam)

/** Add tooth log entry to toothHistory (array).
 * Enabled by (either) currentStatus.toothLogEnabled and currentStatus.compositeTriggerUsed.
 * @param toothTime - Tooth Time
 * @param whichTooth - 0 for Primary (Crank), 2 for Secondary (Cam) 3 for Tertiary (Cam)
 */
static inline void addToothLogEntry(unsigned long toothTime, byte whichTooth)
{
  if(BIT_CHECK(currentStatus.status1, BIT_STATUS1_TOOTHLOG1READY)) { return; }
  //High speed tooth logging history
  if( (currentStatus.toothLogEnabled == true) || (currentStatus.compositeTriggerUsed > 0) ) 
  {
    bool valueLogged = false;
    if(currentStatus.toothLogEnabled == true)
    {
      //Tooth log only works on the Crank tooth
      if(whichTooth == TOOTH_CRANK)
      { 
        toothHistory[toothHistoryIndex] = toothTime; //Set the value in the log. 
        valueLogged = true;
      } 
    }
    else if(currentStatus.compositeTriggerUsed > 0)
    {
      compositeLogHistory[toothHistoryIndex] = 0;
      if(currentStatus.compositeTriggerUsed == 4)
      {
        // we want to display both cams so swap the values round to display primary as cam1 and secondary as cam2, include the crank in the data as the third output
        if(READ_SEC_TRIGGER() == true) { BIT_SET(compositeLogHistory[toothHistoryIndex], COMPOSITE_LOG_PRI); }
        if(READ_THIRD_TRIGGER() == true) { BIT_SET(compositeLogHistory[toothHistoryIndex], COMPOSITE_LOG_SEC); }
        if(READ_PRI_TRIGGER() == true) { BIT_SET(compositeLogHistory[toothHistoryIndex], COMPOSITE_LOG_THIRD); }
        if(whichTooth > TOOTH_CAM_SECONDARY) { BIT_SET(compositeLogHistory[toothHistoryIndex], COMPOSITE_LOG_TRIG); }
      }
      else
      {
        // we want to display crank and one of the cams
        if(READ_PRI_TRIGGER() == true) { BIT_SET(compositeLogHistory[toothHistoryIndex], COMPOSITE_LOG_PRI); }
        if(currentStatus.compositeTriggerUsed == 3)
        { 
          // display cam2 and also log data for cam 1
          if(READ_THIRD_TRIGGER() == true) { BIT_SET(compositeLogHistory[toothHistoryIndex], COMPOSITE_LOG_SEC); } // only the COMPOSITE_LOG_SEC value is visualised hence the swapping of the data
          if(READ_SEC_TRIGGER() == true) { BIT_SET(compositeLogHistory[toothHistoryIndex], COMPOSITE_LOG_THIRD); } 
        } 
        else
        { 
          // display cam1 and also log data for cam 2 - this is the historic composite view
          if(READ_SEC_TRIGGER() == true) { BIT_SET(compositeLogHistory[toothHistoryIndex], COMPOSITE_LOG_SEC); } 
          if(READ_THIRD_TRIGGER() == true) { BIT_SET(compositeLogHistory[toothHistoryIndex], COMPOSITE_LOG_THIRD); }
        }
        if(whichTooth > TOOTH_CRANK) { BIT_SET(compositeLogHistory[toothHistoryIndex], COMPOSITE_LOG_TRIG); }
      }  
      if(currentStatus.hasSync == true) { BIT_SET(compositeLogHistory[toothHistoryIndex], COMPOSITE_LOG_SYNC); }

      if(revolutionOne == 1)
      { BIT_SET(compositeLogHistory[toothHistoryIndex], COMPOSITE_ENGINE_CYCLE);}
      else
      { BIT_CLEAR(compositeLogHistory[toothHistoryIndex], COMPOSITE_ENGINE_CYCLE);}

      toothHistory[toothHistoryIndex] = micros();
      valueLogged = true;
    }

    //If there has been a value logged above, update the indexes
    if(valueLogged == true)
    {
     if(toothHistoryIndex < (TOOTH_LOG_SIZE-1)) { toothHistoryIndex++; BIT_CLEAR(currentStatus.status1, BIT_STATUS1_TOOTHLOG1READY); }
     else { BIT_SET(currentStatus.status1, BIT_STATUS1_TOOTHLOG1READY); }
    }


  } //Tooth/Composite log enabled
}

/** Interrupt handler for primary trigger.
* This function is called on both the rising and falling edges of the primary trigger, when either the 
* composite or tooth loggers are turned on. 
*/
void loggerPrimaryISR(void)
{
  BIT_CLEAR(decoderState, BIT_DECODER_VALID_TRIGGER); //This value will be set to the return value of the decoder function, indicating whether or not this pulse passed the filters
  bool validEdge = false; //This is set true below if the edge 
  /* 
  Need to still call the standard decoder trigger. 
  Two checks here:
  1) If the primary trigger is RISING, then check whether the primary is currently HIGH
  2) If the primary trigger is FALLING, then check whether the primary is currently LOW
  If either of these are true, the primary decoder function is called
  */
  if( ( (primaryTriggerEdge == RISING) && (READ_PRI_TRIGGER() == HIGH) ) || ( (primaryTriggerEdge == FALLING) && (READ_PRI_TRIGGER() == LOW) ) || (primaryTriggerEdge == CHANGE) )
  {
    triggerHandler();
    validEdge = true;
  }
  if( (currentStatus.toothLogEnabled == true) && (BIT_CHECK(decoderState, BIT_DECODER_VALID_TRIGGER)) )
  {
    //Tooth logger only logs when the edge was correct
    if(validEdge == true) 
    { 
      addToothLogEntry(curGap, TOOTH_CRANK);
    }
  }
  else if( (currentStatus.compositeTriggerUsed > 0) )
  {
    //Composite logger adds an entry regardless of which edge it was
    addToothLogEntry(curGap, TOOTH_CRANK);
  }
}

/** Interrupt handler for secondary trigger.
* As loggerPrimaryISR, but for the secondary trigger.
*/
void loggerSecondaryISR(void)
{
  BIT_CLEAR(decoderState, BIT_DECODER_VALID_TRIGGER); //This value will be set to the return value of the decoder function, indicating whether or not this pulse passed the filters
  BIT_SET(decoderState, BIT_DECODER_VALID_TRIGGER); //This value will be set to the return value of the decoder function, indicating whether or not this pulse passed the filters
  /* 3 checks here:
  1) If the primary trigger is RISING, then check whether the primary is currently HIGH
  2) If the primary trigger is FALLING, then check whether the primary is currently LOW
  3) The secondary trigger is CHANGING
  If any of these are true, the primary decoder function is called
  */
  if( ( (secondaryTriggerEdge == RISING) && (READ_SEC_TRIGGER() == HIGH) ) || ( (secondaryTriggerEdge == FALLING) && (READ_SEC_TRIGGER() == LOW) ) || (secondaryTriggerEdge == CHANGE) )
  {
    triggerSecondaryHandler();
  }
  //No tooth logger for the secondary input
  if( (currentStatus.compositeTriggerUsed > 0) && (BIT_CHECK(decoderState, BIT_DECODER_VALID_TRIGGER)) )
  {
    //Composite logger adds an entry regardless of which edge it was
    addToothLogEntry(curGap2, TOOTH_CAM_SECONDARY);
  }
}

/** Interrupt handler for third trigger.
* As loggerPrimaryISR, but for the third trigger.
*/
void loggerTertiaryISR(void)
{
  BIT_CLEAR(decoderState, BIT_DECODER_VALID_TRIGGER); //This value will be set to the return value of the decoder function, indicating whether or not this pulse passed the filters
  BIT_SET(decoderState, BIT_DECODER_VALID_TRIGGER); //This value will be set to the return value of the decoder function, indicating whether or not this pulse passed the filters
  /* 3 checks here:
  1) If the primary trigger is RISING, then check whether the primary is currently HIGH
  2) If the primary trigger is FALLING, then check whether the primary is currently LOW
  3) The secondary trigger is CHANGING
  If any of these are true, the primary decoder function is called
  */
  
  
  if( ( (tertiaryTriggerEdge == RISING) && ( READ_THIRD_TRIGGER() == HIGH) ) || ( (tertiaryTriggerEdge == FALLING) && (READ_THIRD_TRIGGER() == LOW) ) || (tertiaryTriggerEdge == CHANGE) )
  {
    triggerTertiaryHandler();
  }
  //No tooth logger for the secondary input
  if( (currentStatus.compositeTriggerUsed > 0) && (BIT_CHECK(decoderState, BIT_DECODER_VALID_TRIGGER)) )
  {
    //Composite logger adds an entry regardless of which edge it was
    addToothLogEntry(curGap3, TOOTH_CAM_TERTIARY);
  }  
}

static inline bool IsCranking(const statuses &status) {
  return (status.RPM < status.crankRPM) && (status.startRevolutions == 0U);
}

#if defined(UNIT_TEST)
bool SetRevolutionTime(uint32_t revTime)
#else
static __attribute__((noinline)) bool SetRevolutionTime(uint32_t revTime)
#endif
{
  if (revTime!=revolutionTime) {
    revolutionTime = revTime;
    microsPerDegree = div360(revolutionTime << microsPerDegree_Shift);
    degreesPerMicro = (uint16_t)UDIV_ROUND_CLOSEST((UINT32_C(360) << degreesPerMicro_Shift), revolutionTime, uint32_t);
    return true;
  } 
  return false;
}

static bool UpdateRevolutionTimeFromTeeth(bool isCamTeeth) {
  noInterrupts();
  bool updatedRevTime = HasAnySync(currentStatus) 
    && !IsCranking(currentStatus)
    && (toothOneMinusOneTime!=UINT32_C(0))
    && (toothOneTime>toothOneMinusOneTime) 
    //The time in uS that one revolution would take at current speed (The time tooth 1 was last seen, minus the time it was seen prior to that)
    && SetRevolutionTime((toothOneTime - toothOneMinusOneTime) >> (isCamTeeth ? 1U : 0U)); 

  interrupts();
 return updatedRevTime;  
}

static inline uint16_t clampRpm(uint16_t rpm) {
    return rpm>=MAX_RPM ? currentStatus.RPM : rpm;
}

static inline uint16_t RpmFromRevolutionTimeUs(uint32_t revTime) {
  if (revTime<UINT16_MAX) {
    return clampRpm(udiv_32_16_closest(MICROS_PER_MIN, revTime));
  } else {
    return clampRpm((uint16_t)UDIV_ROUND_CLOSEST(MICROS_PER_MIN, revTime, uint32_t)); //Calc RPM based on last full revolution time (Faster as /)
  }
}

/** Compute RPM.
* As nearly all the decoders use a common method of determining RPM (The time the last full revolution took) A common function is simpler.
* @param degreesOver - the number of crank degrees between tooth #1s. Some patterns have a tooth #1 every crank rev, others are every cam rev.
* @return RPM
*/
static __attribute__((noinline)) uint16_t stdGetRPM(bool isCamTeeth)
{
  if (UpdateRevolutionTimeFromTeeth(isCamTeeth)) {
    return RpmFromRevolutionTimeUs(revolutionTime);
  }

  return currentStatus.RPM;
}

/**
 * Sets the new filter time based on the current settings.
 * This ONLY works for even spaced decoders.
 */
static inline void setFilter(unsigned long curGap)
{
  if(configPage4.triggerFilter == 0) { triggerFilterTime = 0; } //trigger filter is turned off.
  else if(configPage4.triggerFilter == 1) { triggerFilterTime = curGap >> 2; } //Lite filter level is 25% of previous gap
  else if(configPage4.triggerFilter == 2) { triggerFilterTime = curGap >> 1; } //Medium filter level is 50% of previous gap
  else if (configPage4.triggerFilter == 3) { triggerFilterTime = (curGap * 3) >> 2; } //Aggressive filter level is 75% of previous gap
  else { triggerFilterTime = 0; } //trigger filter is turned off.
}

/**
This is a special case of RPM measure that is based on the time between the last 2 teeth rather than the time of the last full revolution.
This gives much more volatile reading, but is quite useful during cranking, particularly on low resolution patterns.
It can only be used on patterns where the teeth are evenly spaced.
It takes an argument of the full (COMPLETE) number of teeth per revolution.
For a missing tooth wheel, this is the number if the tooth had NOT been missing (Eg 36-1 = 36)
*/
static __attribute__((noinline)) int crankingGetRPM(byte totalTeeth, bool isCamTeeth)
{
  if( (currentStatus.startRevolutions >= configPage4.StgCycles) && ((currentStatus.hasSync == true) || BIT_CHECK(currentStatus.status3, BIT_STATUS3_HALFSYNC)) )
  {
    if((toothLastMinusOneToothTime > 0) && (toothLastToothTime > toothLastMinusOneToothTime) )
    {
      noInterrupts();
      bool newRevtime = SetRevolutionTime(((toothLastToothTime - toothLastMinusOneToothTime) * totalTeeth) >> (isCamTeeth ? 1U : 0U));
      interrupts();
      if (newRevtime) {
        return RpmFromRevolutionTimeUs(revolutionTime);
      }
    }
  }

  return currentStatus.RPM;
}

/**
On decoders that are enabled for per tooth based timing adjustments, this function performs the timer compare changes on the schedules themselves
For each ignition channel, a check is made whether we're at the relevant tooth and whether that ignition schedule is currently running
Only if both these conditions are met will the schedule be updated with the latest timing information.
If it's the correct tooth, but the schedule is not yet started, calculate and an end compare value (This situation occurs when both the start and end of the ignition pulse happen after the end tooth, but before the next tooth)
*/
static inline void checkPerToothTiming(int16_t crankAngle, uint16_t currentTooth)
{
  if ( (fixedCrankingOverride == 0) && (currentStatus.RPM > 0) )
  {
    if ( (currentTooth == ignition1EndTooth) )
    {
      adjustCrankAngle(ignitionSchedule1, ignition1EndAngle, crankAngle);
    }
    else if ( (currentTooth == ignition2EndTooth) )
    {
      adjustCrankAngle(ignitionSchedule2, ignition2EndAngle, crankAngle);
    }
    else if ( (currentTooth == ignition3EndTooth) )
    {
      adjustCrankAngle(ignitionSchedule3, ignition3EndAngle, crankAngle);
    }
    else if ( (currentTooth == ignition4EndTooth) )
    {
      adjustCrankAngle(ignitionSchedule4, ignition4EndAngle, crankAngle);
    }
#if IGN_CHANNELS >= 5
    else if ( (currentTooth == ignition5EndTooth) )
    {
      adjustCrankAngle(ignitionSchedule5, ignition5EndAngle, crankAngle);
    }
#endif
#if IGN_CHANNELS >= 6
    else if ( (currentTooth == ignition6EndTooth) )
    {
      adjustCrankAngle(ignitionSchedule6, ignition6EndAngle, crankAngle);
    }
#endif
#if IGN_CHANNELS >= 7
    else if ( (currentTooth == ignition7EndTooth) )
    {
      adjustCrankAngle(ignitionSchedule7, ignition7EndAngle, crankAngle);
    }
#endif
#if IGN_CHANNELS >= 8
    else if ( (currentTooth == ignition8EndTooth) )
    {
      adjustCrankAngle(ignitionSchedule8, ignition8EndAngle, crankAngle);
    }
#endif
  }
}
/** @} */
  
/** A (single) multi-tooth wheel with one of more 'missing' teeth.
* The first tooth after the missing one is considered number 1 and is the basis for the trigger angle.
* Note: This decoder does not currently support dual wheel (ie missing tooth + single tooth on cam).
* @defgroup dec_miss Missing tooth wheel
* @{
*/
void triggerSetup_missingTooth(void)
{
  BIT_CLEAR(decoderState, BIT_DECODER_IS_SEQUENTIAL);
  triggerToothAngle = 360 / configPage4.triggerTeeth; //The number of degrees that passes from tooth to tooth
  if(configPage4.TrigSpeed == CAM_SPEED) 
  { 
    //Account for cam speed missing tooth
    triggerToothAngle = 720 / configPage4.triggerTeeth; 
    BIT_SET(decoderState, BIT_DECODER_IS_SEQUENTIAL);
  } 
  triggerActualTeeth = configPage4.triggerTeeth - configPage4.triggerMissingTeeth; //The number of physical teeth on the wheel. Doing this here saves us a calculation each time in the interrupt
  triggerFilterTime = (MICROS_PER_SEC / (MAX_RPM / 60U * configPage4.triggerTeeth)); //Trigger filter time is the shortest possible time (in uS) that there can be between crank teeth (ie at max RPM). Any pulses that occur faster than this time will be discarded as noise
  if (configPage4.trigPatternSec == SEC_TRIGGER_4_1)
  {
    triggerSecFilterTime = MICROS_PER_MIN / MAX_RPM / 4U / 2U;
  }
  else 
  {
    triggerSecFilterTime = (MICROS_PER_SEC / (MAX_RPM / 60U));
  }
  BIT_CLEAR(decoderState, BIT_DECODER_2ND_DERIV);
  checkSyncToothCount = (configPage4.triggerTeeth) >> 1; //50% of the total teeth.
  toothLastMinusOneToothTime = 0;
  toothCurrentCount = 0;
  secondaryToothCount = 0; 
  thirdToothCount = 0;
  toothOneTime = 0;
  toothOneMinusOneTime = 0;
  MAX_STALL_TIME = ((MICROS_PER_DEG_1_RPM/50U) * triggerToothAngle * (configPage4.triggerMissingTeeth + 1U)); //Minimum 50rpm. (3333uS is the time per degree at 50rpm)

  if( (configPage4.TrigSpeed == CRANK_SPEED) &&  ( (configPage4.sparkMode == IGN_MODE_SEQUENTIAL) || (configPage2.injLayout == INJ_SEQUENTIAL) ) ) { BIT_SET(decoderState, BIT_DECODER_HAS_SECONDARY); }
  else { BIT_CLEAR(decoderState, BIT_DECODER_HAS_SECONDARY); }
#ifdef USE_LIBDIVIDE
  divTriggerToothAngle = libdivide::libdivide_s16_gen(triggerToothAngle);
#endif  
}

void triggerPri_missingTooth(void)
{
   curTime = micros();
   curGap = curTime - toothLastToothTime;
   if ( curGap >= triggerFilterTime ) //Pulses should never be less than triggerFilterTime, so if they are it means a false trigger. (A 36-1 wheel at 8000pm will have triggers approx. every 200uS)
   {
     toothCurrentCount++; //Increment the tooth counter
     BIT_SET(decoderState, BIT_DECODER_VALID_TRIGGER); //Flag this pulse as being a valid trigger (ie that it passed filters)

     //if(toothCurrentCount > checkSyncToothCount || currentStatus.hasSync == false)
      if( (toothLastToothTime > 0) && (toothLastMinusOneToothTime > 0) )
      {
        bool isMissingTooth = false;

        /*
        Performance Optimisation:
        Only need to try and detect the missing tooth if:
        1. WE don't have sync yet
        2. We have sync and are in the final 1/4 of the wheel (Missing tooth will/should never occur in the first 3/4)
        3. RPM is under 2000. This is to ensure that we don't interfere with strange timing when cranking or idling. Optimisation not really required at these speeds anyway
        */
        if( (currentStatus.hasSync == false) || (currentStatus.RPM < 2000) || (toothCurrentCount >= (3 * triggerActualTeeth >> 2)) )
        {
          //Begin the missing tooth detection
          //If the time between the current tooth and the last is greater than 1.5x the time between the last tooth and the tooth before that, we make the assertion that we must be at the first tooth after the gap
          if(configPage4.triggerMissingTeeth == 1) { targetGap = (3 * (toothLastToothTime - toothLastMinusOneToothTime)) >> 1; } //Multiply by 1.5 (Checks for a gap 1.5x greater than the last one) (Uses bitshift to multiply by 3 then divide by 2. Much faster than multiplying by 1.5)
          else { targetGap = ((toothLastToothTime - toothLastMinusOneToothTime)) * configPage4.triggerMissingTeeth; } //Multiply by 2 (Checks for a gap 2x greater than the last one)

          if( (toothLastToothTime == 0) || (toothLastMinusOneToothTime == 0) ) { curGap = 0; }

          if ( (curGap > targetGap) || (toothCurrentCount > triggerActualTeeth) )
          {
            //Missing tooth detected
            isMissingTooth = true;
            if( (toothCurrentCount < triggerActualTeeth) && (currentStatus.hasSync == true) ) 
            { 
                //This occurs when we're at tooth #1, but haven't seen all the other teeth. This indicates a signal issue so we flag lost sync so this will attempt to resync on the next revolution.
                currentStatus.hasSync = false;
                BIT_CLEAR(currentStatus.status3, BIT_STATUS3_HALFSYNC); //No sync at all, so also clear HalfSync bit.
                currentStatus.syncLossCounter++;
            }
            //This is to handle a special case on startup where sync can be obtained and the system immediately thinks the revs have jumped:
            //else if (currentStatus.hasSync == false && toothCurrentCount < checkSyncToothCount ) { triggerFilterTime = 0; }
            else
            {
                if((currentStatus.hasSync == true) || BIT_CHECK(currentStatus.status3, BIT_STATUS3_HALFSYNC))
                {
                  currentStatus.startRevolutions++; //Counter
                  if ( configPage4.TrigSpeed == CAM_SPEED ) { currentStatus.startRevolutions++; } //Add an extra revolution count if we're running at cam speed
                }
                else { currentStatus.startRevolutions = 0; }
                
                toothCurrentCount = 1;
                if (configPage4.trigPatternSec == SEC_TRIGGER_POLL) // at tooth one check if the cam sensor is high or low in poll level mode
                {
                  if (configPage4.PollLevelPolarity == READ_SEC_TRIGGER()) { revolutionOne = 1; }
                  else { revolutionOne = 0; }
                }
                else {revolutionOne = !revolutionOne;} //Flip sequential revolution tracker if poll level is not used
                toothOneMinusOneTime = toothOneTime;
                toothOneTime = curTime;

                //if Sequential fuel or ignition is in use, further checks are needed before determining sync
                if( (configPage4.sparkMode == IGN_MODE_SEQUENTIAL) || (configPage2.injLayout == INJ_SEQUENTIAL) )
                {
                  //If either fuel or ignition is sequential, only declare sync if the cam tooth has been seen OR if the missing wheel is on the cam
                  if( (secondaryToothCount > 0) || (configPage4.TrigSpeed == CAM_SPEED) || (configPage4.trigPatternSec == SEC_TRIGGER_POLL) || (configPage2.strokes == TWO_STROKE) )
                  {
                    currentStatus.hasSync = true;
                    BIT_CLEAR(currentStatus.status3, BIT_STATUS3_HALFSYNC); //the engine is fully synced so clear the Half Sync bit                    
                  }
                  else if(currentStatus.hasSync != true) { BIT_SET(currentStatus.status3, BIT_STATUS3_HALFSYNC); } //If there is primary trigger but no secondary we only have half sync.
                }
                else { currentStatus.hasSync = true;  BIT_CLEAR(currentStatus.status3, BIT_STATUS3_HALFSYNC); } //If nothing is using sequential, we have sync and also clear half sync bit
                if(configPage4.trigPatternSec == SEC_TRIGGER_SINGLE || configPage4.trigPatternSec == SEC_TRIGGER_TOYOTA_3) //Reset the secondary tooth counter to prevent it overflowing, done outside of sequental as v6 & v8 engines could be batch firing with VVT that needs the cam resetting
                { 
                  secondaryToothCount = 0; 
                } 

                triggerFilterTime = 0; //This is used to prevent a condition where serious intermittent signals (Eg someone furiously plugging the sensor wire in and out) can leave the filter in an unrecoverable state
                toothLastMinusOneToothTime = toothLastToothTime;
                toothLastToothTime = curTime;
                BIT_CLEAR(decoderState, BIT_DECODER_TOOTH_ANG_CORRECT); //The tooth angle is double at this point
            }
          }
        }
        
        if(isMissingTooth == false)
        {
          //Regular (non-missing) tooth
          setFilter(curGap);
          toothLastMinusOneToothTime = toothLastToothTime;
          toothLastToothTime = curTime;
          BIT_SET(decoderState, BIT_DECODER_TOOTH_ANG_CORRECT);
        }
      }
      else
      {
        //We fall here on initial startup when enough teeth have not yet been seen
        toothLastMinusOneToothTime = toothLastToothTime;
        toothLastToothTime = curTime;
      }
     

      //NEW IGNITION MODE
      if( (configPage2.perToothIgn == true) && (!BIT_CHECK(currentStatus.engine, BIT_ENGINE_CRANK)) ) 
      {
        int16_t crankAngle = ( (toothCurrentCount-1) * triggerToothAngle ) + configPage4.triggerAngle;
        if( (configPage4.sparkMode == IGN_MODE_SEQUENTIAL) && (revolutionOne == true) && (configPage4.TrigSpeed == CRANK_SPEED) && (configPage2.strokes == FOUR_STROKE) )
        {
          crankAngle += 360;
          crankAngle = ignitionLimits(crankAngle);
          checkPerToothTiming(crankAngle, (configPage4.triggerTeeth + toothCurrentCount)); 
        }
        else{ crankAngle = ignitionLimits(crankAngle); checkPerToothTiming(crankAngle, toothCurrentCount); }
      }
   }
}

void triggerSec_missingTooth(void)
{
  curTime2 = micros();
  curGap2 = curTime2 - toothLastSecToothTime;

  //Safety check for initial startup
  if( (toothLastSecToothTime == 0) )
  { 
    curGap2 = 0; 
    toothLastSecToothTime = curTime2;
  }

  if ( curGap2 >= triggerSecFilterTime )
  {
    switch (configPage4.trigPatternSec)
    {
      case SEC_TRIGGER_4_1:
        targetGap2 = (3 * (toothLastSecToothTime - toothLastMinusOneSecToothTime)) >> 1; //If the time between the current tooth and the last is greater than 1.5x the time between the last tooth and the tooth before that, we make the assertion that we must be at the first tooth after the gap
        toothLastMinusOneSecToothTime = toothLastSecToothTime;
        if ( (curGap2 >= targetGap2) || (secondaryToothCount > 3) )
        {
          secondaryToothCount = 1;
          revolutionOne = 1; //Sequential revolution reset
          triggerSecFilterTime = 0; //This is used to prevent a condition where serious intermittent signals (Eg someone furiously plugging the sensor wire in and out) can leave the filter in an unrecoverable state
          triggerRecordVVT1Angle ();
        }
        else
        {
          triggerSecFilterTime = curGap2 >> 2; //Set filter at 25% of the current speed. Filter can only be recalc'd for the regular teeth, not the missing one.
          secondaryToothCount++;
        }
        break;

      case SEC_TRIGGER_SINGLE:
        //Standard single tooth cam trigger
        revolutionOne = 1; //Sequential revolution reset
        triggerSecFilterTime = curGap2 >> 1; //Next secondary filter is half the current gap
        secondaryToothCount++;
        triggerRecordVVT1Angle ();
        break;

      case SEC_TRIGGER_TOYOTA_3:
        // designed for Toyota VVTI (2JZ) engine - 3 triggers on the cam. 
        // the 2 teeth for this are within 1 rotation (1 tooth first 360, 2 teeth second 360)
        secondaryToothCount++;
        if(secondaryToothCount == 2)
        { 
          revolutionOne = 1; // sequential revolution reset
          triggerRecordVVT1Angle ();         
        }        
        //Next secondary filter is 25% the current gap, done here so we don't get a great big gap for the 1st tooth
        triggerSecFilterTime = curGap2 >> 2; 
        break;
    }
    toothLastSecToothTime = curTime2;
  } //Trigger filter
}

static inline void triggerRecordVVT1Angle (void)
{
  //Record the VVT Angle
  if( (configPage6.vvtEnabled > 0) && (revolutionOne == 1) )
  {
    int16_t curAngle;
    curAngle = getCrankAngle();
    while(curAngle > 360) { curAngle -= 360; }
    curAngle -= configPage4.triggerAngle; //Value at TDC
    if( configPage6.vvtMode == VVT_MODE_CLOSED_LOOP ) { curAngle -= configPage10.vvtCL0DutyAng; }

    currentStatus.vvt1Angle = ANGLE_FILTER( (curAngle << 1), configPage4.ANGLEFILTER_VVT, currentStatus.vvt1Angle);
  }
}


void triggerThird_missingTooth(void)
{
//Record the VVT2 Angle (the only purpose of the third trigger)
//NB no filtering of this signal with current implementation unlike Cam (VVT1)

  int16_t curAngle;
  curTime3 = micros();
  curGap3 = curTime3 - toothLastThirdToothTime;

  //Safety check for initial startup
  if( (toothLastThirdToothTime == 0) )
  { 
    curGap3 = 0; 
    toothLastThirdToothTime = curTime3;
  }

  if ( curGap3 >= triggerThirdFilterTime )
  {
    thirdToothCount++;
    triggerThirdFilterTime = curGap3 >> 2; //Next third filter is 25% the current gap
    
    curAngle = getCrankAngle();
    while(curAngle > 360) { curAngle -= 360; }
    curAngle -= configPage4.triggerAngle; //Value at TDC
    if( configPage6.vvtMode == VVT_MODE_CLOSED_LOOP ) { curAngle -= configPage4.vvt2CL0DutyAng; }
    //currentStatus.vvt2Angle = int8_t (curAngle); //vvt1Angle is only int8, but +/-127 degrees is enough for VVT control
    currentStatus.vvt2Angle = ANGLE_FILTER( (curAngle << 1), configPage4.ANGLEFILTER_VVT, currentStatus.vvt2Angle);    

    toothLastThirdToothTime = curTime3;
  } //Trigger filter
}

uint16_t getRPM_missingTooth(void)
{
  uint16_t tempRPM = 0;
  if( currentStatus.RPM < currentStatus.crankRPM )
  {
    if(toothCurrentCount != 1)
    {
      tempRPM = crankingGetRPM(configPage4.triggerTeeth, configPage4.TrigSpeed==CAM_SPEED); //Account for cam speed
    }
    else { tempRPM = currentStatus.RPM; } //Can't do per tooth RPM if we're at tooth #1 as the missing tooth messes the calculation
  }
  else
  {
    tempRPM = stdGetRPM(configPage4.TrigSpeed==CAM_SPEED); //Account for cam speed
  }
  return tempRPM;
}

int getCrankAngle_missingTooth(void)
{
    //This is the current angle ATDC the engine is at. This is the last known position based on what tooth was last 'seen'. It is only accurate to the resolution of the trigger wheel (Eg 36-1 is 10 degrees)
    unsigned long tempToothLastToothTime;
    int tempToothCurrentCount;
    bool tempRevolutionOne;
    //Grab some variables that are used in the trigger code and assign them to temp variables.
    noInterrupts();
    tempToothCurrentCount = toothCurrentCount;
    tempRevolutionOne = revolutionOne;
    tempToothLastToothTime = toothLastToothTime;
    interrupts();

    int crankAngle = ((tempToothCurrentCount - 1) * triggerToothAngle) + configPage4.triggerAngle; //Number of teeth that have passed since tooth 1, multiplied by the angle each tooth represents, plus the angle that tooth 1 is ATDC. This gives accuracy only to the nearest tooth.
    
    //Sequential check (simply sets whether we're on the first or 2nd revolution of the cycle)
    if ( (tempRevolutionOne == true) && (configPage4.TrigSpeed == CRANK_SPEED) ) { crankAngle += 360; }

    lastCrankAngleCalc = micros();
    elapsedTime = (lastCrankAngleCalc - tempToothLastToothTime);
    crankAngle += timeToAngleDegPerMicroSec(elapsedTime);

    if (crankAngle >= 720) { crankAngle -= 720; }
    if (crankAngle < 0) { crankAngle += CRANK_ANGLE_MAX; }

    return crankAngle;
}

static inline uint16_t clampToToothCount(int16_t toothNum, uint8_t toothAdder) {
  int16_t toothRange = (int16_t)configPage4.triggerTeeth + (int16_t)toothAdder;
  return (uint16_t)nudge(1, toothRange, toothNum, toothRange);
}

static inline uint16_t clampToActualTeeth(uint16_t toothNum, uint8_t toothAdder) {
  if(toothNum > triggerActualTeeth && toothNum <= configPage4.triggerTeeth) { toothNum = triggerActualTeeth; }
  return min(toothNum, (uint16_t)(triggerActualTeeth + toothAdder));
}

static uint16_t __attribute__((noinline)) calcEndTeeth_missingTooth(int endAngle, uint8_t toothAdder) {
  //Temp variable used here to avoid potential issues if a trigger interrupt occurs part way through this function
  int16_t tempEndTooth;
#ifdef USE_LIBDIVIDE  
  tempEndTooth = libdivide::libdivide_s16_do(endAngle - configPage4.triggerAngle, &divTriggerToothAngle);
#else
  tempEndTooth = (endAngle - (int16_t)configPage4.triggerAngle) / (int16_t)triggerToothAngle;
#endif
  //For higher tooth count triggers, add a 1 tooth margin to allow for calculation time. 
  if(configPage4.triggerTeeth > 12U) { tempEndTooth = tempEndTooth - 1; }
  
  // Clamp to tooth count
  return clampToActualTeeth(clampToToothCount(tempEndTooth, toothAdder), toothAdder);
}

void triggerSetEndTeeth_missingTooth(void)
{
  uint8_t toothAdder = 0;
  if( (configPage4.sparkMode == IGN_MODE_SEQUENTIAL) && (configPage4.TrigSpeed == CRANK_SPEED) && (configPage2.strokes == FOUR_STROKE) ) { toothAdder = configPage4.triggerTeeth; }

  ignition1EndTooth = calcEndTeeth_missingTooth(ignition1EndAngle, toothAdder);
  ignition2EndTooth = calcEndTeeth_missingTooth(ignition2EndAngle, toothAdder);
  ignition3EndTooth = calcEndTeeth_missingTooth(ignition3EndAngle, toothAdder);
  ignition4EndTooth = calcEndTeeth_missingTooth(ignition4EndAngle, toothAdder);
#if IGN_CHANNELS >= 5
  ignition5EndTooth = calcEndTeeth_missingTooth(ignition5EndAngle, toothAdder);
#endif
#if IGN_CHANNELS >= 6
  ignition6EndTooth = calcEndTeeth_missingTooth(ignition6EndAngle, toothAdder);
#endif
#if IGN_CHANNELS >= 7
  ignition7EndTooth = calcEndTeeth_missingTooth(ignition7EndAngle, toothAdder);
#endif
#if IGN_CHANNELS >= 8
  ignition8EndTooth = calcEndTeeth_missingTooth(ignition8EndAngle, toothAdder);
#endif
}
/** @} */

/** Dual wheels - 2 wheels located either both on the crank or with the primary on the crank and the secondary on the cam.
Note: There can be no missing teeth on the primary wheel.
* @defgroup dec_dual Dual wheels
* @{
*/
/** Dual Wheel Setup.
 * 
 * */
void triggerSetup_DualWheel(void)
{
  triggerToothAngle = 360 / configPage4.triggerTeeth; //The number of degrees that passes from tooth to tooth
  if(configPage4.TrigSpeed == CAM_SPEED) { triggerToothAngle = 720 / configPage4.triggerTeeth; } //Account for cam speed
  toothCurrentCount = 255; //Default value
  triggerFilterTime = (MICROS_PER_SEC / (MAX_RPM / 60U * configPage4.triggerTeeth)); //Trigger filter time is the shortest possible time (in uS) that there can be between crank teeth (ie at max RPM). Any pulses that occur faster than this time will be discarded as noise
  triggerSecFilterTime = (MICROS_PER_SEC / (MAX_RPM / 60U * 2U)) / 2U; //Same as above, but fixed at 2 teeth on the secondary input and divided by 2 (for cam speed)
  BIT_CLEAR(decoderState, BIT_DECODER_2ND_DERIV);
  BIT_SET(decoderState, BIT_DECODER_IS_SEQUENTIAL);
  BIT_SET(decoderState, BIT_DECODER_TOOTH_ANG_CORRECT); //This is always true for this pattern
  BIT_SET(decoderState, BIT_DECODER_HAS_SECONDARY);
  MAX_STALL_TIME = ((MICROS_PER_DEG_1_RPM/50U) * triggerToothAngle); //Minimum 50rpm. (3333uS is the time per degree at 50rpm)
#ifdef USE_LIBDIVIDE
  divTriggerToothAngle = libdivide::libdivide_s16_gen(triggerToothAngle);
#endif
}

/** Dual Wheel Primary.
 * 
 * */
void triggerPri_DualWheel(void)
{
    curTime = micros();
    curGap = curTime - toothLastToothTime;
    if ( curGap >= triggerFilterTime )
    {
      toothCurrentCount++; //Increment the tooth counter
      BIT_SET(decoderState, BIT_DECODER_VALID_TRIGGER); //Flag this pulse as being a valid trigger (ie that it passed filters)

      toothLastMinusOneToothTime = toothLastToothTime;
      toothLastToothTime = curTime;

      if ( currentStatus.hasSync == true )
      {
        if ( (toothCurrentCount == 1) || (toothCurrentCount > configPage4.triggerTeeth) )
        {
          toothCurrentCount = 1;
          revolutionOne = !revolutionOne; //Flip sequential revolution tracker
          toothOneMinusOneTime = toothOneTime;
          toothOneTime = curTime;
          currentStatus.startRevolutions++; //Counter
          if ( configPage4.TrigSpeed == CAM_SPEED ) { currentStatus.startRevolutions++; } //Add an extra revolution count if we're running at cam speed
        }

        setFilter(curGap); //Recalc the new filter value
      }

      //NEW IGNITION MODE
      if( (configPage2.perToothIgn == true) && (!BIT_CHECK(currentStatus.engine, BIT_ENGINE_CRANK)) ) 
      {
        int16_t crankAngle = ( (toothCurrentCount-1) * triggerToothAngle ) + configPage4.triggerAngle;
        if( (configPage4.sparkMode == IGN_MODE_SEQUENTIAL) && (revolutionOne == true) && (configPage4.TrigSpeed == CRANK_SPEED) )
        {
          crankAngle += 360;
          checkPerToothTiming(crankAngle, (configPage4.triggerTeeth + toothCurrentCount)); 
        }
        else{ checkPerToothTiming(crankAngle, toothCurrentCount); }
      }
   } //Trigger filter
}
/** Dual Wheel Secondary.
 * 
 * */
void triggerSec_DualWheel(void)
{
  curTime2 = micros();
  curGap2 = curTime2 - toothLastSecToothTime;
  if ( curGap2 >= triggerSecFilterTime )
  {
    toothLastSecToothTime = curTime2;
    triggerSecFilterTime = curGap2 >> 2; //Set filter at 25% of the current speed

    if( (currentStatus.hasSync == false) || (currentStatus.startRevolutions <= configPage4.StgCycles) )
    {
      toothLastToothTime = micros();
      toothLastMinusOneToothTime = micros() - ((MICROS_PER_MIN/10U) / configPage4.triggerTeeth); //Fixes RPM at 10rpm until a full revolution has taken place
      toothCurrentCount = configPage4.triggerTeeth;
      triggerFilterTime = 0; //Need to turn the filter off here otherwise the first primary tooth after achieving sync is ignored

      currentStatus.hasSync = true;
    }
    else 
    {
      if ( (toothCurrentCount != configPage4.triggerTeeth) && (currentStatus.startRevolutions > 2)) { currentStatus.syncLossCounter++; } //Indicates likely sync loss.
      if (configPage4.useResync == 1) { toothCurrentCount = configPage4.triggerTeeth; }
    }

    revolutionOne = 1; //Sequential revolution reset
  }
  else 
  {
    triggerSecFilterTime = revolutionTime >> 1; //Set filter at 25% of the current cam speed. This needs to be performed here to prevent a situation where the RPM and triggerSecFilterTime get out of alignment and curGap2 never exceeds the filter value
  } //Trigger filter
}
/** Dual Wheel - Get RPM.
 * 
 * */
uint16_t getRPM_DualWheel(void)
{
  if( currentStatus.hasSync == true )
  {
    //Account for cam speed
    if( currentStatus.RPM < currentStatus.crankRPM )
    {
      return crankingGetRPM(configPage4.triggerTeeth, configPage4.TrigSpeed==CAM_SPEED);
    }
    else
    {
      return stdGetRPM(configPage4.TrigSpeed==CAM_SPEED);
    }
  }
  return 0U;
}

/** Dual Wheel - Get Crank angle.
 * 
 * */
int getCrankAngle_DualWheel(void)
{
    //This is the current angle ATDC the engine is at. This is the last known position based on what tooth was last 'seen'. It is only accurate to the resolution of the trigger wheel (Eg 36-1 is 10 degrees)
    unsigned long tempToothLastToothTime;
    int tempToothCurrentCount;
    bool tempRevolutionOne;
    //Grab some variables that are used in the trigger code and assign them to temp variables.
    noInterrupts();
    tempToothCurrentCount = toothCurrentCount;
    tempToothLastToothTime = toothLastToothTime;
    tempRevolutionOne = revolutionOne;
    lastCrankAngleCalc = micros();
    interrupts();

    //Handle case where the secondary tooth was the last one seen
    if(tempToothCurrentCount == 0) { tempToothCurrentCount = configPage4.triggerTeeth; }

    int crankAngle = ((tempToothCurrentCount - 1) * triggerToothAngle) + configPage4.triggerAngle; //Number of teeth that have passed since tooth 1, multiplied by the angle each tooth represents, plus the angle that tooth 1 is ATDC. This gives accuracy only to the nearest tooth.

    elapsedTime = (lastCrankAngleCalc - tempToothLastToothTime);
    crankAngle += timeToAngleDegPerMicroSec(elapsedTime);

    //Sequential check (simply sets whether we're on the first or 2nd revolution of the cycle)
    if ( (tempRevolutionOne == true) && (configPage4.TrigSpeed == CRANK_SPEED) ) { crankAngle += 360; }

    if (crankAngle >= 720) { crankAngle -= 720; }
    if (crankAngle < 0) { crankAngle += CRANK_ANGLE_MAX; }

    return crankAngle;
}

static uint16_t __attribute__((noinline)) calcEndTeeth_DualWheel(int ignitionAngle, uint8_t toothAdder) {
  int16_t tempEndTooth =
#ifdef USE_LIBDIVIDE
      libdivide::libdivide_s16_do(ignitionAngle - configPage4.triggerAngle, &divTriggerToothAngle);
#else
      (ignitionAngle - (int16_t)configPage4.triggerAngle) / (int16_t)triggerToothAngle;
#endif
  return clampToToothCount(tempEndTooth, toothAdder);
}

/** Dual Wheel - Set End Teeth.
 * 
 * */
void triggerSetEndTeeth_DualWheel(void)
{
  //The toothAdder variable is used for when a setup is running sequentially, but the primary wheel is running at crank speed. This way the count of teeth will go up to 2* the number of primary teeth to allow for a sequential count. 
  byte toothAdder = 0;
  if( (configPage4.sparkMode == IGN_MODE_SEQUENTIAL) && (configPage4.TrigSpeed == CRANK_SPEED) ) { toothAdder = configPage4.triggerTeeth; }

  ignition1EndTooth = calcEndTeeth_DualWheel(ignition1EndAngle, toothAdder);
  ignition2EndTooth = calcEndTeeth_DualWheel(ignition2EndAngle, toothAdder);
  ignition3EndTooth = calcEndTeeth_DualWheel(ignition3EndAngle, toothAdder);
  ignition4EndTooth = calcEndTeeth_DualWheel(ignition4EndAngle, toothAdder);
#if IGN_CHANNELS >= 5
  ignition5EndTooth = calcEndTeeth_DualWheel(ignition5EndAngle, toothAdder);
#endif
#if IGN_CHANNELS >= 6
  ignition6EndTooth = calcEndTeeth_DualWheel(ignition6EndAngle, toothAdder);
#endif
#if IGN_CHANNELS >= 7
  ignition7EndTooth = calcEndTeeth_DualWheel(ignition7EndAngle, toothAdder);
#endif
#if IGN_CHANNELS >= 8
  ignition8EndTooth = calcEndTeeth_DualWheel(ignition8EndAngle, toothAdder);
#endif
}
/** @} */

/** Basic Distributor where tooth count is equal to the number of cylinders and teeth are evenly spaced on the cam.
* No position sensing (Distributor is retained) so crank angle is
* a made up figure based purely on the first teeth to be seen.
* Note: This is a very simple decoder. See http://www.megamanual.com/ms2/GM_7pinHEI.htm
* @defgroup dec_dist Basic Distributor
* @{
*/
void triggerSetup_BasicDistributor(void)
{
  triggerActualTeeth = configPage2.nCylinders;
  if(triggerActualTeeth == 0) { triggerActualTeeth = 1; }

  //The number of degrees that passes from tooth to tooth. Depends on number of cylinders and whether 4 or 2 stroke
  if(configPage2.strokes == FOUR_STROKE) { triggerToothAngle = 720U / triggerActualTeeth; }
  else { triggerToothAngle = 360U / triggerActualTeeth; }

  triggerFilterTime = MICROS_PER_MIN / MAX_RPM / configPage2.nCylinders; // Minimum time required between teeth
  triggerFilterTime = triggerFilterTime / 2; //Safety margin
  triggerFilterTime = 0;
  BIT_CLEAR(decoderState, BIT_DECODER_2ND_DERIV);
  BIT_CLEAR(decoderState, BIT_DECODER_IS_SEQUENTIAL);
  BIT_CLEAR(decoderState, BIT_DECODER_HAS_SECONDARY);
  toothCurrentCount = 0; //Default value
  BIT_SET(decoderState, BIT_DECODER_HAS_FIXED_CRANKING);
  BIT_SET(decoderState, BIT_DECODER_TOOTH_ANG_CORRECT);
  if(configPage2.nCylinders <= 4U) { MAX_STALL_TIME = ((MICROS_PER_DEG_1_RPM/90U) * triggerToothAngle); }//Minimum 90rpm. (1851uS is the time per degree at 90rpm). This uses 90rpm rather than 50rpm due to the potentially very high stall time on a 4 cylinder if we wait that long.
  else { MAX_STALL_TIME = ((MICROS_PER_DEG_1_RPM/50U) * triggerToothAngle); } //Minimum 50rpm. (3200uS is the time per degree at 50rpm).

}

void triggerPri_BasicDistributor(void)
{
  curTime = micros();
  curGap = curTime - toothLastToothTime;
  if ( (curGap >= triggerFilterTime) )
  {
    if(currentStatus.hasSync == true) { setFilter(curGap); } //Recalc the new filter value
    else { triggerFilterTime = 0; } //If we don't yet have sync, ensure that the filter won't prevent future valid pulses from being ignored. 
    
    if( (toothCurrentCount == triggerActualTeeth) || (currentStatus.hasSync == false) ) //Check if we're back to the beginning of a revolution
    {
      toothCurrentCount = 1; //Reset the counter
      toothOneMinusOneTime = toothOneTime;
      toothOneTime = curTime;
      currentStatus.hasSync = true;
      currentStatus.startRevolutions++; //Counter
    }
    else
    {
      if( (toothCurrentCount < triggerActualTeeth) ) { toothCurrentCount++; } //Increment the tooth counter
      else
      {
        //This means toothCurrentCount is greater than triggerActualTeeth, which is bad.
        //If we have sync here then there's a problem. Throw a sync loss
        if( currentStatus.hasSync == true ) 
        { 
          currentStatus.syncLossCounter++;
          currentStatus.hasSync = false;
        }
      }
      
    }

    BIT_SET(decoderState, BIT_DECODER_VALID_TRIGGER); //Flag this pulse as being a valid trigger (ie that it passed filters)

    if ( configPage4.ignCranklock && BIT_CHECK(currentStatus.engine, BIT_ENGINE_CRANK) )
    {
      endCoil1Charge();
      endCoil2Charge();
      endCoil3Charge();
      endCoil4Charge();
    }

    if(configPage2.perToothIgn == true)
    {
      int16_t crankAngle = ( (toothCurrentCount-1) * triggerToothAngle ) + configPage4.triggerAngle;
      crankAngle = ignitionLimits((crankAngle));
      if(toothCurrentCount > (triggerActualTeeth/2) ) { checkPerToothTiming(crankAngle, (toothCurrentCount - (triggerActualTeeth/2))); }
      else { checkPerToothTiming(crankAngle, toothCurrentCount); }
    }

    toothLastMinusOneToothTime = toothLastToothTime;
    toothLastToothTime = curTime;
  } //Trigger filter
}
void triggerSec_BasicDistributor(void) { return; } //Not required
uint16_t getRPM_BasicDistributor(void)
{
  uint16_t tempRPM;
  uint8_t distributorSpeed = CAM_SPEED; //Default to cam speed
  if(configPage2.strokes == TWO_STROKE) { distributorSpeed = CRANK_SPEED; } //For 2 stroke distributors, the tooth rate is based on crank speed, not 'cam'

  if( currentStatus.RPM < currentStatus.crankRPM || currentStatus.RPM < 1500)
  { 
    tempRPM = crankingGetRPM(triggerActualTeeth, distributorSpeed);
  } 
  else { tempRPM = stdGetRPM(distributorSpeed); }

  MAX_STALL_TIME = revolutionTime << 1; //Set the stall time to be twice the current RPM. This is a safe figure as there should be no single revolution where this changes more than this
  if(triggerActualTeeth == 1) { MAX_STALL_TIME = revolutionTime << 1; } //Special case for 1 cylinder engines that only get 1 pulse every 720 degrees
  if(MAX_STALL_TIME < 366667UL) { MAX_STALL_TIME = 366667UL; } //Check for 50rpm minimum

  return tempRPM;

}
int getCrankAngle_BasicDistributor(void)
{
    //This is the current angle ATDC the engine is at. This is the last known position based on what tooth was last 'seen'. It is only accurate to the resolution of the trigger wheel (Eg 36-1 is 10 degrees)
    unsigned long tempToothLastToothTime;
    int tempToothCurrentCount;
    //Grab some variables that are used in the trigger code and assign them to temp variables.
    noInterrupts();
    tempToothCurrentCount = toothCurrentCount;
    tempToothLastToothTime = toothLastToothTime;
    lastCrankAngleCalc = micros(); //micros() is no longer interrupt safe
    interrupts();

    int crankAngle = ((tempToothCurrentCount - 1) * triggerToothAngle) + configPage4.triggerAngle; //Number of teeth that have passed since tooth 1, multiplied by the angle each tooth represents, plus the angle that tooth 1 is ATDC. This gives accuracy only to the nearest tooth.
    
    //Estimate the number of degrees travelled since the last tooth}
    elapsedTime = (lastCrankAngleCalc - tempToothLastToothTime);

    //crankAngle += timeToAngleDegPerMicroSec(elapsedTime);
    crankAngle += timeToAngleIntervalTooth(elapsedTime);
    

    if (crankAngle >= 720) { crankAngle -= 720; }
    if (crankAngle < 0) { crankAngle += CRANK_ANGLE_MAX; }

    return crankAngle;
}

void triggerSetEndTeeth_BasicDistributor(void)
{

  int tempEndAngle = (ignition1EndAngle - configPage4.triggerAngle);
  tempEndAngle = ignitionLimits((tempEndAngle));

  switch(configPage2.nCylinders)
  {
    case 4:
      if( (tempEndAngle > 180) || (tempEndAngle <= 0) )
      {
        ignition1EndTooth = 2;
        ignition2EndTooth = 1;
      }
      else
      {
        ignition1EndTooth = 1;
        ignition2EndTooth = 2;
      }
      break;
    case 3: //Shared with 6 cylinder
    case 6:
      if( (tempEndAngle > 120) && (tempEndAngle <= 240) )
      {
        ignition1EndTooth = 2;
        ignition2EndTooth = 3;
        ignition3EndTooth = 1;
      }
      else if( (tempEndAngle > 240) || (tempEndAngle <= 0) )
      {
        ignition1EndTooth = 3;
        ignition2EndTooth = 1;
        ignition3EndTooth = 2;
      }
      else
      {
        ignition1EndTooth = 1;
        ignition2EndTooth = 2;
        ignition3EndTooth = 3;
      }
      break;
    case 8:
      if( (tempEndAngle > 90) && (tempEndAngle <= 180) )
      {
        ignition1EndTooth = 2;
        ignition2EndTooth = 3;
        ignition3EndTooth = 4;
        ignition4EndTooth = 1;
      }
      else if( (tempEndAngle > 180) && (tempEndAngle <= 270) )
      {
        ignition1EndTooth = 3;
        ignition2EndTooth = 4;
        ignition3EndTooth = 1;
        ignition4EndTooth = 2;
      }
      else if( (tempEndAngle > 270) || (tempEndAngle <= 0) )
      {
        ignition1EndTooth = 4;
        ignition2EndTooth = 1;
        ignition3EndTooth = 2;
        ignition4EndTooth = 3;
      }
      else
      {
        ignition1EndTooth = 1;
        ignition2EndTooth = 2;
        ignition3EndTooth = 3;
        ignition4EndTooth = 4;
      }
      break;
  }
}
/** @} */

/** Decode GM 7X trigger wheel with six equally spaced teeth and a seventh tooth for cylinder identification.
* Note: Within the decoder code pf GM7X, the sync tooth is referred to as tooth #3 rather than tooth #7. This makes for simpler angle calculations
* (See: http://www.speeduino.com/forum/download/file.php?id=4743 ).
* @defgroup dec_gm7x GM7X
* @{
*/
void triggerSetup_GM7X(void)
{
  triggerToothAngle = 360 / 6; //The number of degrees that passes from tooth to tooth
  BIT_CLEAR(decoderState, BIT_DECODER_2ND_DERIV);
  BIT_CLEAR(decoderState, BIT_DECODER_IS_SEQUENTIAL);
  BIT_CLEAR(decoderState, BIT_DECODER_HAS_SECONDARY);
  MAX_STALL_TIME = ((MICROS_PER_DEG_1_RPM/50U) * triggerToothAngle); //Minimum 50rpm. (3333uS is the time per degree at 50rpm)
}

void triggerPri_GM7X(void)
{
    lastGap = curGap;
    curTime = micros();
    curGap = curTime - toothLastToothTime;
    toothCurrentCount++; //Increment the tooth counter
    BIT_SET(decoderState, BIT_DECODER_VALID_TRIGGER); //Flag this pulse as being a valid trigger (ie that it passed filters)

    if( (toothLastToothTime > 0) && (toothLastMinusOneToothTime > 0) )
    {
      if( toothCurrentCount > 7 )
      {
        toothCurrentCount = 1;
        toothOneMinusOneTime = toothOneTime;
        toothOneTime = curTime;

        BIT_SET(decoderState, BIT_DECODER_TOOTH_ANG_CORRECT);
      }
      else
      {
        targetGap = (lastGap) >> 1; //The target gap is set at half the last tooth gap
        if ( curGap < targetGap ) //If the gap between this tooth and the last one is less than half of the previous gap, then we are very likely at the magical 3rd tooth
        {
          toothCurrentCount = 3;
          currentStatus.hasSync = true;
          BIT_CLEAR(decoderState, BIT_DECODER_TOOTH_ANG_CORRECT); //The tooth angle is double at this point
          currentStatus.startRevolutions++; //Counter
        }
        else
        {
          BIT_SET(decoderState, BIT_DECODER_TOOTH_ANG_CORRECT);
        }
      }
    }

    //New ignition mode!
    if(configPage2.perToothIgn == true)
    {
      if(toothCurrentCount != 3) //Never do the check on the extra tooth. It's not needed anyway
      {
        //configPage4.triggerAngle must currently be below 48 and above -81
        int16_t crankAngle;
        if( toothCurrentCount < 3 )
        {
          crankAngle = ((toothCurrentCount - 1) * triggerToothAngle) + 42 + configPage4.triggerAngle; //Number of teeth that have passed since tooth 1, multiplied by the angle each tooth represents, plus the angle that tooth 1 is ATDC. This gives accuracy only to the nearest tooth.
        }
        else
        {
          crankAngle = ((toothCurrentCount - 2) * triggerToothAngle) + 42 + configPage4.triggerAngle; //Number of teeth that have passed since tooth 1, multiplied by the angle each tooth represents, plus the angle that tooth 1 is ATDC. This gives accuracy only to the nearest tooth.
        }
        checkPerToothTiming(crankAngle, toothCurrentCount);
      } 
    }

    toothLastMinusOneToothTime = toothLastToothTime;
    toothLastToothTime = curTime;


}
void triggerSec_GM7X(void) { return; } //Not required
uint16_t getRPM_GM7X(void)
{
   return stdGetRPM(CRANK_SPEED);
}
int getCrankAngle_GM7X(void)
{
    //This is the current angle ATDC the engine is at. This is the last known position based on what tooth was last 'seen'. It is only accurate to the resolution of the trigger wheel (Eg 36-1 is 10 degrees)
    unsigned long tempToothLastToothTime;
    int tempToothCurrentCount;
    //Grab some variables that are used in the trigger code and assign them to temp variables.
    noInterrupts();
    tempToothCurrentCount = toothCurrentCount;
    tempToothLastToothTime = toothLastToothTime;
    lastCrankAngleCalc = micros(); //micros() is no longer interrupt safe
    interrupts();

    //Check if the last tooth seen was the reference tooth (Number 3). All others can be calculated, but tooth 3 has a unique angle
    int crankAngle;
    if( tempToothCurrentCount < 3 )
    {
      crankAngle = ((tempToothCurrentCount - 1) * triggerToothAngle) + 42 + configPage4.triggerAngle; //Number of teeth that have passed since tooth 1, multiplied by the angle each tooth represents, plus the angle that tooth 1 is ATDC. This gives accuracy only to the nearest tooth.
    }
    else if( tempToothCurrentCount == 3 )
    {
      crankAngle = 112;
    }
    else
    {
      crankAngle = ((tempToothCurrentCount - 2) * triggerToothAngle) + 42 + configPage4.triggerAngle; //Number of teeth that have passed since tooth 1, multiplied by the angle each tooth represents, plus the angle that tooth 1 is ATDC. This gives accuracy only to the nearest tooth.
    }

    //Estimate the number of degrees travelled since the last tooth}
    elapsedTime = (lastCrankAngleCalc - tempToothLastToothTime);
    crankAngle += timeToAngleDegPerMicroSec(elapsedTime);

    if (crankAngle >= 720) { crankAngle -= 720; }
    if (crankAngle < 0) { crankAngle += 360; }

    return crankAngle;
}

void triggerSetEndTeeth_GM7X(void)
{
  if(currentStatus.advance < 18 ) 
  { 
    ignition1EndTooth = 7;
    ignition2EndTooth = 2;
    ignition3EndTooth = 5;
  }
  else 
  { 
    ignition1EndTooth = 6;
    ignition2EndTooth = 1;
    ignition3EndTooth = 4;
  }
}
/** @} */

/** Mitsubishi 4G63 / NA/NB Miata + MX-5 / 4/2.
Note: raw.githubusercontent.com/noisymime/speeduino/master/reference/wiki/decoders/4g63_trace.png
Tooth #1 is defined as the next crank tooth after the crank signal is HIGH when the cam signal is falling.
Tooth number one is at 355* ATDC.
* @defgroup dec_mitsu_miata Mistsubishi 4G63 and Miata + MX-5
* @{
*/
void triggerSetup_4G63(void)
{
  triggerToothAngle = 180; //The number of degrees that passes from tooth to tooth (primary)
  toothCurrentCount = 99; //Fake tooth count represents no sync
  BIT_CLEAR(decoderState, BIT_DECODER_2ND_DERIV);
  BIT_SET(decoderState, BIT_DECODER_IS_SEQUENTIAL);
  BIT_SET(decoderState, BIT_DECODER_HAS_FIXED_CRANKING);
  BIT_SET(decoderState, BIT_DECODER_TOOTH_ANG_CORRECT);
  BIT_SET(decoderState, BIT_DECODER_HAS_SECONDARY);
  MAX_STALL_TIME = 366667UL; //Minimum 50rpm based on the 110 degree tooth spacing
  if(currentStatus.initialisationComplete == false) { toothLastToothTime = micros(); } //Set a startup value here to avoid filter errors when starting. This MUST have the initial check to prevent the fuel pump just staying on all the time

  //Note that these angles are for every rising and falling edge
  if(configPage2.nCylinders == 6)
  {
    //New values below
    toothAngles[0] = 715; //Rising edge of tooth #1
    toothAngles[1] = 45;  //Falling edge of tooth #1
    toothAngles[2] = 115; //Rising edge of tooth #2
    toothAngles[3] = 165; //Falling edge of tooth #2
    toothAngles[4] = 235; //Rising edge of tooth #3
    toothAngles[5] = 285; //Falling edge of tooth #3

    toothAngles[6] = 355; //Rising edge of tooth #4
    toothAngles[7] = 405; //Falling edge of tooth #4
    toothAngles[8] = 475; //Rising edge of tooth #5
    toothAngles[9] = 525; //Falling edge of tooth $5
    toothAngles[10] = 595; //Rising edge of tooth #6
    toothAngles[11] = 645; //Falling edge of tooth #6

    triggerActualTeeth = 12; //Both sides of all teeth over 720 degrees
  }
  else
  {
    // 70 / 110 for 4 cylinder
    toothAngles[0] = 715; //Falling edge of tooth #1
    toothAngles[1] = 105; //Rising edge of tooth #2
    toothAngles[2] = 175; //Falling edge of tooth #2
    toothAngles[3] = 285; //Rising edge of tooth #1

    toothAngles[4] = 355; //Falling edge of tooth #1
    toothAngles[5] = 465; //Rising edge of tooth #2
    toothAngles[6] = 535; //Falling edge of tooth #2
    toothAngles[7] = 645; //Rising edge of tooth #1

    triggerActualTeeth = 8;
  }

  triggerFilterTime = 1500; //10000 rpm, assuming we're triggering on both edges off the crank tooth.
  triggerSecFilterTime = (int)(MICROS_PER_SEC / (MAX_RPM / 60U * 2U)) / 2U; //Same as above, but fixed at 2 teeth on the secondary input and divided by 2 (for cam speed)
  triggerSecFilterTime_duration = 4000;
  secondaryLastToothTime = 0;
}

void triggerPri_4G63(void)
{
  curTime = micros();
  curGap = curTime - toothLastToothTime;
  if ( (curGap >= triggerFilterTime) || (currentStatus.startRevolutions == 0) )
  {
    BIT_SET(decoderState, BIT_DECODER_VALID_TRIGGER); //Flag this pulse as being a valid trigger (ie that it passed filters)
    triggerFilterTime = curGap >> 2; //This only applies during non-sync conditions. If there is sync then triggerFilterTime gets changed again below with a better value.

    toothLastMinusOneToothTime = toothLastToothTime;
    toothLastToothTime = curTime;

    toothCurrentCount++;

    if( (toothCurrentCount == 1) || (toothCurrentCount > triggerActualTeeth) ) //Trigger is on CHANGE, hence 4 pulses = 1 crank rev (or 6 pulses for 6 cylinders)
    {
       toothCurrentCount = 1; //Reset the counter
       toothOneMinusOneTime = toothOneTime;
       toothOneTime = curTime;
       currentStatus.startRevolutions++; //Counter
    }

    if (currentStatus.hasSync == true)
    {
      if ( BIT_CHECK(currentStatus.engine, BIT_ENGINE_CRANK) && configPage4.ignCranklock && (currentStatus.startRevolutions >= configPage4.StgCycles))
      {
        if(configPage2.nCylinders == 4)
        {
          //This operates in forced wasted spark mode during cranking to align with crank teeth
          if( (toothCurrentCount == 1) || (toothCurrentCount == 5) ) { endCoil1Charge(); endCoil3Charge(); }
          else if( (toothCurrentCount == 3) || (toothCurrentCount == 7) ) { endCoil2Charge(); endCoil4Charge(); }
        }
        else if(configPage2.nCylinders == 6)
        {
          if( (toothCurrentCount == 1) || (toothCurrentCount == 7) ) { endCoil1Charge(); }
          else if( (toothCurrentCount == 3) || (toothCurrentCount == 9) ) { endCoil2Charge(); }
          else if( (toothCurrentCount == 5) || (toothCurrentCount == 11) ) { endCoil3Charge(); }
        }
      }

      //Whilst this is an uneven tooth pattern, if the specific angle between the last 2 teeth is specified, 1st deriv prediction can be used
      if( (configPage4.triggerFilter == 1) || (currentStatus.RPM < 1400) )
      {
        //Lite filter
        if( (toothCurrentCount == 1) || (toothCurrentCount == 3) || (toothCurrentCount == 5) || (toothCurrentCount == 7) || (toothCurrentCount == 9) || (toothCurrentCount == 11) )
        {
          if(configPage2.nCylinders == 4)
          {
            triggerToothAngle = 70;
            triggerFilterTime = curGap; //Trigger filter is set to whatever time it took to do 70 degrees (Next trigger is 110 degrees away)
          }
          else if(configPage2.nCylinders == 6)
          {
            triggerToothAngle = 70;
            triggerFilterTime = (curGap >> 2); //Trigger filter is set to (70/4)=17.5=17 degrees (Next trigger is 50 degrees away).
          }
        }
        else
        {
          if(configPage2.nCylinders == 4)
          {
            triggerToothAngle = 110;
            triggerFilterTime = (curGap * 3) >> 3; //Trigger filter is set to (110*3)/8=41.25=41 degrees (Next trigger is 70 degrees away).
          }
          else if(configPage2.nCylinders == 6)
          {
            triggerToothAngle = 50;
            triggerFilterTime = curGap >> 1; //Trigger filter is set to 25 degrees (Next trigger is 70 degrees away).
          }
        }
      }
      else if(configPage4.triggerFilter == 2)
      {
        //Medium filter level
        if( (toothCurrentCount == 1) || (toothCurrentCount == 3) || (toothCurrentCount == 5) || (toothCurrentCount == 7) || (toothCurrentCount == 9) || (toothCurrentCount == 11) )
        { 
          triggerToothAngle = 70; 
          if(configPage2.nCylinders == 4)
          { 
            triggerFilterTime = (curGap * 5) >> 2 ; //87.5 degrees with a target of 110
          }
          else
          {
            triggerFilterTime = curGap >> 1 ; //35 degrees with a target of 50
          }
        } 
        else 
        { 
          if(configPage2.nCylinders == 4)
          { 
            triggerToothAngle = 110; 
            triggerFilterTime = (curGap >> 1); //55 degrees with a target of 70
          }
          else
          {
            triggerToothAngle = 50; 
            triggerFilterTime = (curGap * 3) >> 2; //Trigger filter is set to (50*3)/4=37.5=37 degrees (Next trigger is 70 degrees away).
          }
        } 
      }
      else if (configPage4.triggerFilter == 3)
      {
        //Aggressive filter level
        if( (toothCurrentCount == 1) || (toothCurrentCount == 3) || (toothCurrentCount == 5) || (toothCurrentCount == 7) || (toothCurrentCount == 9) || (toothCurrentCount == 11) )
        { 
          triggerToothAngle = 70; 
          if(configPage2.nCylinders == 4)
          { 
            triggerFilterTime = (curGap * 11) >> 3;//96.26 degrees with a target of 110
          }
          else
          {
            triggerFilterTime = curGap >> 1 ; //35 degrees with a target of 50
          }
        } 
        else 
        { 
          if(configPage2.nCylinders == 4)
          { 
            triggerToothAngle = 110; 
            triggerFilterTime = (curGap * 9) >> 5; //61.87 degrees with a target of 70
          }
          else
          {
            triggerToothAngle = 50; 
            triggerFilterTime = curGap; //50 degrees with a target of 70
          }
        } 
      }
      else
      {
        //trigger filter is turned off.
        triggerFilterTime = 0;
        if( (toothCurrentCount == 1) || (toothCurrentCount == 3) || (toothCurrentCount == 5) || (toothCurrentCount == 7) || (toothCurrentCount == 9) || (toothCurrentCount == 11) )
        { 
          if(configPage2.nCylinders == 4) { triggerToothAngle = 70; }
          else  { triggerToothAngle = 70; }
        } 
        else 
        { 
          if(configPage2.nCylinders == 4) { triggerToothAngle = 110; }
          else  { triggerToothAngle = 50; }
        }
      }

      //EXPERIMENTAL!
      //New ignition mode is ONLY available on 4g63 when the trigger angle is set to the stock value of 0.
      if( (configPage2.perToothIgn == true) && (configPage4.triggerAngle == 0) )
      {
        if( (configPage2.nCylinders == 4) && (currentStatus.advance > 0) )
        {
          int16_t crankAngle = ignitionLimits( toothAngles[(toothCurrentCount-1)] );

          //Handle non-sequential tooth counts 
          if( (configPage4.sparkMode != IGN_MODE_SEQUENTIAL) && (toothCurrentCount > configPage2.nCylinders) ) { checkPerToothTiming(crankAngle, (toothCurrentCount-configPage2.nCylinders) ); }
          else { checkPerToothTiming(crankAngle, toothCurrentCount); }
        }
      }
    } //Has sync
    else
    {
      triggerSecFilterTime = 0;
      //New secondary method of determining sync
      if(READ_PRI_TRIGGER() == true)
      {
        if(READ_SEC_TRIGGER() == true) { revolutionOne = true; }
        else { revolutionOne = false; }
      }
      else
      {
        if( (READ_SEC_TRIGGER() == false) && (revolutionOne == true) ) 
        { 
          //Crank is low, cam is low and the crank pulse STARTED when the cam was high. 
          if(configPage2.nCylinders == 4) { toothCurrentCount = 1; } //Means we're at 5* BTDC on a 4G63 4 cylinder
          //else if(configPage2.nCylinders == 6) { toothCurrentCount = 8; } 
        } 
        //If sequential is ever enabled, the below toothCurrentCount will need to change:
        else if( (READ_SEC_TRIGGER() == true) && (revolutionOne == true) ) 
        { 
          //Crank is low, cam is high and the crank pulse STARTED when the cam was high. 
          if(configPage2.nCylinders == 4) { toothCurrentCount = 5; } //Means we're at 5* BTDC on a 4G63 4 cylinder
          else if(configPage2.nCylinders == 6) { toothCurrentCount = 2; currentStatus.hasSync = true; } //Means we're at 45* ATDC on 6G72 6 cylinder
        } 
      }
    }
  } //Filter time

}
void triggerSec_4G63(void)
{
  //byte crankState = READ_PRI_TRIGGER();
  //First filter is a duration based one to ensure the pulse was of sufficient length (time)
  //if(READ_SEC_TRIGGER()) { secondaryLastToothTime1 = micros(); return; }
  if(currentStatus.hasSync == true)
  {
  //1166 is the time taken to cross 70 degrees at 10k rpm
  //if ( (micros() - secondaryLastToothTime1) < triggerSecFilterTime_duration ) { return; }
  //triggerSecFilterTime_duration = (micros() - secondaryLastToothTime1) >> 1;
  }


  curTime2 = micros();
  curGap2 = curTime2 - toothLastSecToothTime;
  if ( (curGap2 >= triggerSecFilterTime) )//|| (currentStatus.startRevolutions == 0) )
  {
    toothLastSecToothTime = curTime2;
    BIT_SET(decoderState, BIT_DECODER_VALID_TRIGGER); //Flag this pulse as being a valid trigger (ie that it passed filters)
    //addToothLogEntry(curGap, TOOTH_CAM_SECONDARY);

    triggerSecFilterTime = curGap2 >> 1; //Basic 50% filter for the secondary reading
    //More aggressive options:
    //62.5%:
    //triggerSecFilterTime = (curGap2 * 9) >> 5;
    //75%:
    //triggerSecFilterTime = (curGap2 * 6) >> 3;

    //if( (currentStatus.RPM < currentStatus.crankRPM) || (currentStatus.hasSync == false) )
    if( (currentStatus.hasSync == false) )
    {

      triggerFilterTime = 1500; //If this is removed, can have trouble getting sync again after the engine is turned off (but ECU not reset).
      triggerSecFilterTime = triggerSecFilterTime >> 1; //Divide the secondary filter time by 2 again, making it 25%. Only needed when cranking
      if(READ_PRI_TRIGGER() == true)
      {
        if(configPage2.nCylinders == 4)
        { 
          if(toothCurrentCount == 8) { currentStatus.hasSync = true; } //Is 8 for sequential, was 4
        }
        else if(configPage2.nCylinders == 6) 
        { 
          if(toothCurrentCount == 7) { currentStatus.hasSync = true; }
        }

      }
      else
      {
        if(configPage2.nCylinders == 4)
        { 
          if(toothCurrentCount == 5) { currentStatus.hasSync = true; } //Is 5 for sequential, was 1
        }
        //Cannot gain sync for 6 cylinder here. 
      }
    }

    //if ( (micros() - secondaryLastToothTime1) < triggerSecFilterTime_duration && configPage2.useResync )
    if ( (currentStatus.RPM < currentStatus.crankRPM) || (configPage4.useResync == 1) )
    {
      if( (currentStatus.hasSync == true) && (configPage2.nCylinders == 4) )
      {
        triggerSecFilterTime_duration = (micros() - secondaryLastToothTime1) >> 1;
        if(READ_PRI_TRIGGER() == true)
        {
          //Whilst we're cranking and have sync, we need to watch for noise pulses.
          if(toothCurrentCount != 8) 
          { 
            // This should never be true, except when there's noise
            currentStatus.hasSync = false; 
            currentStatus.syncLossCounter++;
          } 
          else { toothCurrentCount = 8; } //Why? Just why?
        }
      } //Has sync and 4 cylinder 
    } // Use resync or cranking
  } //Trigger filter
}


uint16_t getRPM_4G63(void)
{
  uint16_t tempRPM = 0;
  //During cranking, RPM is calculated 4 times per revolution, once for each rising/falling of the crank signal.
  //Because these signals aren't even (Alternating 110 and 70 degrees), this needs a special function
  if(currentStatus.hasSync == true)
  {
    if( (currentStatus.RPM < currentStatus.crankRPM)  )
    {
      int tempToothAngle;
      unsigned long toothTime;
      if( (toothLastToothTime == 0) || (toothLastMinusOneToothTime == 0) ) { tempRPM = 0; }
      else
      {
        noInterrupts();
        tempToothAngle = triggerToothAngle;
        toothTime = (toothLastToothTime - toothLastMinusOneToothTime); //Note that trigger tooth angle changes between 70 and 110 depending on the last tooth that was seen (or 70/50 for 6 cylinders)
        interrupts();
        toothTime = toothTime * 36;
        tempRPM = ((unsigned long)tempToothAngle * (MICROS_PER_MIN/10U)) / toothTime;
        SetRevolutionTime((10UL * toothTime) / tempToothAngle);
        MAX_STALL_TIME = 366667UL; // 50RPM
      }
    }
    else
    {
      tempRPM = stdGetRPM(CAM_SPEED);
      //EXPERIMENTAL! Add/subtract RPM based on the last rpmDOT calc
      //tempRPM += (micros() - toothOneTime) * currentStatus.rpmDOT
      MAX_STALL_TIME = revolutionTime << 1; //Set the stall time to be twice the current RPM. This is a safe figure as there should be no single revolution where this changes more than this
      if(MAX_STALL_TIME < 366667UL) { MAX_STALL_TIME = 366667UL; } //Check for 50rpm minimum
    }
  }

  return tempRPM;
}

int getCrankAngle_4G63(void)
{
    int crankAngle = 0;
    if(currentStatus.hasSync == true)
    {
      //This is the current angle ATDC the engine is at. This is the last known position based on what tooth was last 'seen'. It is only accurate to the resolution of the trigger wheel (Eg 36-1 is 10 degrees)
      unsigned long tempToothLastToothTime;
      int tempToothCurrentCount;
      //Grab some variables that are used in the trigger code and assign them to temp variables.
      noInterrupts();
      tempToothCurrentCount = toothCurrentCount;
      tempToothLastToothTime = toothLastToothTime;
      lastCrankAngleCalc = micros(); //micros() is no longer interrupt safe
      interrupts();

      crankAngle = toothAngles[(tempToothCurrentCount - 1)] + configPage4.triggerAngle; //Perform a lookup of the fixed toothAngles array to find what the angle of the last tooth passed was.

      //Estimate the number of degrees travelled since the last tooth}
      elapsedTime = (lastCrankAngleCalc - tempToothLastToothTime);
      crankAngle += timeToAngleIntervalTooth(elapsedTime);

      if (crankAngle >= 720) { crankAngle -= 720; }
      if (crankAngle < 0) { crankAngle += 360; }
    }
    return crankAngle;
}

void triggerSetEndTeeth_4G63(void)
{
  if(configPage2.nCylinders == 4)
  {
    if(configPage4.sparkMode == IGN_MODE_SEQUENTIAL) 
    { 
      ignition1EndTooth = 8;
      ignition2EndTooth = 2;
      ignition3EndTooth = 4;
      ignition4EndTooth = 6;
    }
    else
    {
      ignition1EndTooth = 4;
      ignition2EndTooth = 2;
      ignition3EndTooth = 4; //Not used
      ignition4EndTooth = 2;
    }
  }
  if(configPage2.nCylinders == 6)
  {
    if(configPage4.sparkMode == IGN_MODE_SEQUENTIAL) 
    { 
      //This should never happen as 6 cylinder sequential not supported
      ignition1EndTooth = 8;
      ignition2EndTooth = 2;
      ignition3EndTooth = 4;
      ignition4EndTooth = 6;
    }
    else
    {
      ignition1EndTooth = 6;
      ignition2EndTooth = 2;
      ignition3EndTooth = 4;
      ignition4EndTooth = 2; //Not used
    }
  }
}
/** @} */

/** GM 24X Decoder (eg early LS1 1996-2005).
Note: Useful references:
* 
- www.vems.hu/wiki/index.php?page=MembersPage%2FJorgenKarlsson%2FTwentyFourX

Provided that the cam signal is used, this decoder simply counts the teeth and then looks their angles up against a lookup table. The cam signal is used to determine tooth #1
* @defgroup dec_gm GM 24X
* @{
*/
void triggerSetup_24X(void)
{
  triggerToothAngle = 15; //The number of degrees that passes from tooth to tooth (primary)
  toothAngles[0] = 12;
  toothAngles[1] = 18;
  toothAngles[2] = 33;
  toothAngles[3] = 48;
  toothAngles[4] = 63;
  toothAngles[5] = 78;
  toothAngles[6] = 102;
  toothAngles[7] = 108;
  toothAngles[8] = 123;
  toothAngles[9] = 138;
  toothAngles[10] = 162;
  toothAngles[11] = 177;
  toothAngles[12] = 183;
  toothAngles[13] = 198;
  toothAngles[14] = 222;
  toothAngles[15] = 237;
  toothAngles[16] = 252;
  toothAngles[17] = 258;
  toothAngles[18] = 282;
  toothAngles[19] = 288;
  toothAngles[20] = 312;
  toothAngles[21] = 327;
  toothAngles[22] = 342;
  toothAngles[23] = 357;

  MAX_STALL_TIME = ((MICROS_PER_DEG_1_RPM/50U) * triggerToothAngle); //Minimum 50rpm. (3333uS is the time per degree at 50rpm)
  if(currentStatus.initialisationComplete == false) { toothCurrentCount = 25; toothLastToothTime = micros(); } //Set a startup value here to avoid filter errors when starting. This MUST have the init check to prevent the fuel pump just staying on all the time
  BIT_CLEAR(decoderState, BIT_DECODER_2ND_DERIV);
  BIT_SET(decoderState, BIT_DECODER_IS_SEQUENTIAL);
  BIT_SET(decoderState, BIT_DECODER_TOOTH_ANG_CORRECT);
  BIT_SET(decoderState, BIT_DECODER_HAS_SECONDARY);
}

void triggerPri_24X(void)
{
  if(toothCurrentCount == 25) { currentStatus.hasSync = false; } //Indicates sync has not been achieved (Still waiting for 1 revolution of the crank to take place)
  else
  {
    curTime = micros();
    curGap = curTime - toothLastToothTime;

    if(toothCurrentCount == 0)
    {
       toothCurrentCount = 1; //Reset the counter
       toothOneMinusOneTime = toothOneTime;
       toothOneTime = curTime;
       revolutionOne = !revolutionOne; //Sequential revolution flip
       currentStatus.hasSync = true;
       currentStatus.startRevolutions++; //Counter
       triggerToothAngle = 15; //Always 15 degrees for tooth #15
    }
    else
    {
      toothCurrentCount++; //Increment the tooth counter
      triggerToothAngle = toothAngles[(toothCurrentCount-1)] - toothAngles[(toothCurrentCount-2)]; //Calculate the last tooth gap in degrees
    }

    BIT_SET(decoderState, BIT_DECODER_VALID_TRIGGER); //Flag this pulse as being a valid trigger (ie that it passed filters)

    toothLastToothTime = curTime;


  }
}

void triggerSec_24X(void)
{
  toothCurrentCount = 0; //All we need to do is reset the tooth count back to zero, indicating that we're at the beginning of a new revolution
  revolutionOne = 1; //Sequential revolution reset
}

uint16_t getRPM_24X(void)
{
   return stdGetRPM(CRANK_SPEED);
}
int getCrankAngle_24X(void)
{
    //This is the current angle ATDC the engine is at. This is the last known position based on what tooth was last 'seen'. It is only accurate to the resolution of the trigger wheel (Eg 36-1 is 10 degrees)
    unsigned long tempToothLastToothTime;
    int tempToothCurrentCount, tempRevolutionOne;
    //Grab some variables that are used in the trigger code and assign them to temp variables.
    noInterrupts();
    tempToothCurrentCount = toothCurrentCount;
    tempToothLastToothTime = toothLastToothTime;
    tempRevolutionOne = revolutionOne;
    lastCrankAngleCalc = micros(); //micros() is no longer interrupt safe
    interrupts();

    int crankAngle;
    if (tempToothCurrentCount == 0) { crankAngle = 0 + configPage4.triggerAngle; } //This is the special case to handle when the 'last tooth' seen was the cam tooth. 0 is the angle at which the crank tooth goes high (Within 360 degrees).
    else { crankAngle = toothAngles[(tempToothCurrentCount - 1)] + configPage4.triggerAngle;} //Perform a lookup of the fixed toothAngles array to find what the angle of the last tooth passed was.

    //Estimate the number of degrees travelled since the last tooth}
    elapsedTime = (lastCrankAngleCalc - tempToothLastToothTime);
    crankAngle += timeToAngleDegPerMicroSec(elapsedTime);

    //Sequential check (simply sets whether we're on the first or 2nd revolution of the cycle)
    if (tempRevolutionOne == 1) { crankAngle += 360; }

    if (crankAngle >= 720) { crankAngle -= 720; }
    if (crankAngle < 0) { crankAngle += 360; }

    return crankAngle;
}

void triggerSetEndTeeth_24X(void)
{
}
/** @} */

/** Jeep 2000 - 24 crank teeth over 720 degrees, in groups of 4 ('91 to 2000 6 cylinder Jeep engines).
* Crank wheel is high for 360 crank degrees. Quite similar to the 24X setup.
* As we only need timing within 360 degrees, only 12 tooth angles are defined.
* Tooth number 1 represents the first tooth seen after the cam signal goes high.
* www.speeduino.com/forum/download/file.php?id=205
* @defgroup dec_jeep Jeep 2000 (6 cyl)
* @{
*/
void triggerSetup_Jeep2000(void)
{
  triggerToothAngle = 0; //The number of degrees that passes from tooth to tooth (primary)
  toothAngles[0] = 174;
  toothAngles[1] = 194;
  toothAngles[2] = 214;
  toothAngles[3] = 234;
  toothAngles[4] = 294;
  toothAngles[5] = 314;
  toothAngles[6] = 334;
  toothAngles[7] = 354;
  toothAngles[8] = 414;
  toothAngles[9] = 434;
  toothAngles[10] = 454;
  toothAngles[11] = 474;

  MAX_STALL_TIME = ((MICROS_PER_DEG_1_RPM/50U) * 60U); //Minimum 50rpm. (3333uS is the time per degree at 50rpm). Largest gap between teeth is 60 degrees.
  if(currentStatus.initialisationComplete == false) { toothCurrentCount = 13; toothLastToothTime = micros(); } //Set a startup value here to avoid filter errors when starting. This MUST have the initial check to prevent the fuel pump just staying on all the time
  BIT_CLEAR(decoderState, BIT_DECODER_2ND_DERIV);
  BIT_CLEAR(decoderState, BIT_DECODER_IS_SEQUENTIAL);
  BIT_SET(decoderState, BIT_DECODER_TOOTH_ANG_CORRECT);
  BIT_SET(decoderState, BIT_DECODER_HAS_SECONDARY);
}

void triggerPri_Jeep2000(void)
{
  if(toothCurrentCount == 13) { currentStatus.hasSync = false; } //Indicates sync has not been achieved (Still waiting for 1 revolution of the crank to take place)
  else
  {
    curTime = micros();
    curGap = curTime - toothLastToothTime;
    if ( curGap >= triggerFilterTime )
    {
      if(toothCurrentCount == 0)
      {
         toothCurrentCount = 1; //Reset the counter
         toothOneMinusOneTime = toothOneTime;
         toothOneTime = curTime;
         currentStatus.hasSync = true;
         currentStatus.startRevolutions++; //Counter
         triggerToothAngle = 60; //There are groups of 4 pulses (Each 20 degrees apart), with each group being 60 degrees apart. Hence #1 is always 60
      }
      else
      {
        toothCurrentCount++; //Increment the tooth counter
        triggerToothAngle = toothAngles[(toothCurrentCount-1)] - toothAngles[(toothCurrentCount-2)]; //Calculate the last tooth gap in degrees
      }

      setFilter(curGap); //Recalc the new filter value

      BIT_SET(decoderState, BIT_DECODER_VALID_TRIGGER); //Flag this pulse as being a valid trigger (ie that it passed filters)

      toothLastMinusOneToothTime = toothLastToothTime;
      toothLastToothTime = curTime;
    } //Trigger filter
  } //Sync check
}
void triggerSec_Jeep2000(void)
{
  toothCurrentCount = 0; //All we need to do is reset the tooth count back to zero, indicating that we're at the beginning of a new revolution
  return;
}

uint16_t getRPM_Jeep2000(void)
{
   return stdGetRPM(CRANK_SPEED);
}
int getCrankAngle_Jeep2000(void)
{
    //This is the current angle ATDC the engine is at. This is the last known position based on what tooth was last 'seen'. It is only accurate to the resolution of the trigger wheel (Eg 36-1 is 10 degrees)
    unsigned long tempToothLastToothTime;
    int tempToothCurrentCount;
    //Grab some variables that are used in the trigger code and assign them to temp variables.
    noInterrupts();
    tempToothCurrentCount = toothCurrentCount;
    tempToothLastToothTime = toothLastToothTime;
    lastCrankAngleCalc = micros(); //micros() is no longer interrupt safe
    interrupts();

    int crankAngle;
    if (toothCurrentCount == 0) { crankAngle = 114 + configPage4.triggerAngle; } //This is the special case to handle when the 'last tooth' seen was the cam tooth. Since  the tooth timings were taken on the previous crank tooth, the previous crank tooth angle is used here, not cam angle.
    else { crankAngle = toothAngles[(tempToothCurrentCount - 1)] + configPage4.triggerAngle;} //Perform a lookup of the fixed toothAngles array to find what the angle of the last tooth passed was.

    //Estimate the number of degrees travelled since the last tooth}
    elapsedTime = (lastCrankAngleCalc - tempToothLastToothTime);
    crankAngle += timeToAngleDegPerMicroSec(elapsedTime);

    if (crankAngle >= 720) { crankAngle -= 720; }
    if (crankAngle < 0) { crankAngle += 360; }

    return crankAngle;
}

void triggerSetEndTeeth_Jeep2000(void)
{
}
/** @} */

/** Audi with 135 teeth on the crank and 1 tooth on the cam.
* This is very similar to the dual wheel decoder, however due to the 135 teeth not dividing evenly into 360,
* only every 3rd crank tooth is used in calculating the crank angle. This effectively makes it a 45 tooth dual wheel setup.
* @defgroup dec_audi135 Audi 135
* @{
*/
void triggerSetup_Audi135(void)
{
  triggerToothAngle = 8; //135/3 = 45, 360/45 = 8 degrees every 3 teeth
  toothCurrentCount = 255; //Default value
  toothSystemCount = 0;
  triggerFilterTime = (unsigned long)(MICROS_PER_SEC / (MAX_RPM / 60U * 135UL)); //Trigger filter time is the shortest possible time (in uS) that there can be between crank teeth (ie at max RPM). Any pulses that occur faster than this time will be discarded as noise
  triggerSecFilterTime = (int)(MICROS_PER_SEC / (MAX_RPM / 60U * 2U)) / 2U; //Same as above, but fixed at 2 teeth on the secondary input and divided by 2 (for cam speed)
  MAX_STALL_TIME = ((MICROS_PER_DEG_1_RPM/50U) * triggerToothAngle); //Minimum 50rpm. (3333uS is the time per degree at 50rpm)
  BIT_CLEAR(decoderState, BIT_DECODER_2ND_DERIV);
  BIT_SET(decoderState, BIT_DECODER_IS_SEQUENTIAL);
  BIT_SET(decoderState, BIT_DECODER_TOOTH_ANG_CORRECT);
  BIT_SET(decoderState, BIT_DECODER_HAS_SECONDARY);
}

void triggerPri_Audi135(void)
{
   curTime = micros();
   curGap = curTime - toothSystemLastToothTime;
   if ( (curGap > triggerFilterTime) || (currentStatus.startRevolutions == 0) )
   {
     toothSystemCount++;

     if ( currentStatus.hasSync == false ) { toothLastToothTime = curTime; }
     else
     {
       if ( toothSystemCount >= 3 )
       {
         //We only proceed for every third tooth

         BIT_SET(decoderState, BIT_DECODER_VALID_TRIGGER); //Flag this pulse as being a valid trigger (ie that it passed filters)
         toothSystemLastToothTime = curTime;
         toothSystemCount = 0;
         toothCurrentCount++; //Increment the tooth counter

         if ( (toothCurrentCount == 1) || (toothCurrentCount > 45) )
         {
           toothCurrentCount = 1;
           toothOneMinusOneTime = toothOneTime;
           toothOneTime = curTime;
           revolutionOne = !revolutionOne;
           currentStatus.startRevolutions++; //Counter
         }

         setFilter(curGap); //Recalc the new filter value

         toothLastMinusOneToothTime = toothLastToothTime;
         toothLastToothTime = curTime;
       } //3rd tooth check
     } // Sync check
   } // Trigger filter
}

void triggerSec_Audi135(void)
{
  /*
  curTime2 = micros();
  curGap2 = curTime2 - toothLastSecToothTime;
  if ( curGap2 < triggerSecFilterTime ) { return; }
  toothLastSecToothTime = curTime2;
  */

  if( currentStatus.hasSync == false )
  {
    toothCurrentCount = 0;
    currentStatus.hasSync = true;
    toothSystemCount = 3; //Need to set this to 3 so that the next primary tooth is counted
  }
  else if (configPage4.useResync == 1) { toothCurrentCount = 0; toothSystemCount = 3; }
  else if ( (currentStatus.startRevolutions < 100) && (toothCurrentCount != 45) ) { toothCurrentCount = 0; }
  revolutionOne = 1; //Sequential revolution reset
}

uint16_t getRPM_Audi135(void)
{
   return stdGetRPM(CRANK_SPEED);
}

int getCrankAngle_Audi135(void)
{
    //This is the current angle ATDC the engine is at. This is the last known position based on what tooth was last 'seen'. It is only accurate to the resolution of the trigger wheel (Eg 36-1 is 10 degrees)
    unsigned long tempToothLastToothTime;
    int tempToothCurrentCount;
    bool tempRevolutionOne;
    //Grab some variables that are used in the trigger code and assign them to temp variables.
    noInterrupts();
    tempToothCurrentCount = toothCurrentCount;
    tempToothLastToothTime = toothLastToothTime;
    tempRevolutionOne = revolutionOne;
    lastCrankAngleCalc = micros(); //micros() is no longer interrupt safe
    interrupts();

    //Handle case where the secondary tooth was the last one seen
    if(tempToothCurrentCount == 0) { tempToothCurrentCount = 45; }

    int crankAngle = ((tempToothCurrentCount - 1) * triggerToothAngle) + configPage4.triggerAngle; //Number of teeth that have passed since tooth 1, multiplied by the angle each tooth represents, plus the angle that tooth 1 is ATDC. This gives accuracy only to the nearest tooth.
    
    //Estimate the number of degrees travelled since the last tooth}
    elapsedTime = (lastCrankAngleCalc - tempToothLastToothTime);
    crankAngle += timeToAngleDegPerMicroSec(elapsedTime);

    //Sequential check (simply sets whether we're on the first or 2nd revolution of the cycle)
    if (tempRevolutionOne) { crankAngle += 360; }

    if (crankAngle >= 720) { crankAngle -= 720; }
    if (crankAngle < 0) { crankAngle += CRANK_ANGLE_MAX; }

    return crankAngle;
}

void triggerSetEndTeeth_Audi135(void)
{
}
/** @} */
/** Honda D17 (1.7 liter 4 cyl SOHC).
* 
* @defgroup dec_honda_d17 Honda D17
* @{
*/
void triggerSetup_HondaD17(void)
{
  triggerToothAngle = 360 / 12; //The number of degrees that passes from tooth to tooth
  MAX_STALL_TIME = ((MICROS_PER_DEG_1_RPM/50U) * triggerToothAngle); //Minimum 50rpm. (3333uS is the time per degree at 50rpm)
  BIT_CLEAR(decoderState, BIT_DECODER_2ND_DERIV);
  BIT_CLEAR(decoderState, BIT_DECODER_IS_SEQUENTIAL);
  BIT_CLEAR(decoderState, BIT_DECODER_HAS_SECONDARY);
}

void triggerPri_HondaD17(void)
{
   lastGap = curGap;
   curTime = micros();
   curGap = curTime - toothLastToothTime;
   toothCurrentCount++; //Increment the tooth counter

   BIT_SET(decoderState, BIT_DECODER_VALID_TRIGGER); //Flag this pulse as being a valid trigger (ie that it passed filters)

   //
   if( (toothCurrentCount == 13) && (currentStatus.hasSync == true) )
   {
     toothCurrentCount = 0;
   }
   else if( (toothCurrentCount == 1) && (currentStatus.hasSync == true) )
   {
     toothOneMinusOneTime = toothOneTime;
     toothOneTime = curTime;
     currentStatus.startRevolutions++; //Counter

     toothLastMinusOneToothTime = toothLastToothTime;
     toothLastToothTime = curTime;
   }
   else
   {
     //13th tooth
     targetGap = (lastGap) >> 1; //The target gap is set at half the last tooth gap
     if ( curGap < targetGap) //If the gap between this tooth and the last one is less than half of the previous gap, then we are very likely at the magical 13th tooth
     {
       toothCurrentCount = 0;
       currentStatus.hasSync = true;
     }
     else
     {
       //The tooth times below don't get set on tooth 13(The magical 13th tooth should not be considered for any calculations that use those times)
       toothLastMinusOneToothTime = toothLastToothTime;
       toothLastToothTime = curTime;
     }
   }

}
void triggerSec_HondaD17(void) { return; } //The 4+1 signal on the cam is yet to be supported. If this ever changes, update BIT_DECODER_HAS_SECONDARY in the setup() function
uint16_t getRPM_HondaD17(void)
{
   return stdGetRPM(CRANK_SPEED);
}
int getCrankAngle_HondaD17(void)
{
    //This is the current angle ATDC the engine is at. This is the last known position based on what tooth was last 'seen'. It is only accurate to the resolution of the trigger wheel (Eg 36-1 is 10 degrees)
    unsigned long tempToothLastToothTime;
    int tempToothCurrentCount;
    //Grab some variables that are used in the trigger code and assign them to temp variables.
    noInterrupts();
    tempToothCurrentCount = toothCurrentCount;
    tempToothLastToothTime = toothLastToothTime;
    lastCrankAngleCalc = micros(); //micros() is no longer interrupt safe
    interrupts();

    //Check if the last tooth seen was the reference tooth 13 (Number 0 here). All others can be calculated, but tooth 3 has a unique angle
    int crankAngle;
    if( tempToothCurrentCount == 0 )
    {
      crankAngle = (11 * triggerToothAngle) + configPage4.triggerAngle; //if temptoothCurrentCount is 0, the last tooth seen was the 13th one. Based on this, ignore the 13th tooth and use the 12th one as the last reference.
    }
    else
    {
      crankAngle = ((tempToothCurrentCount - 1) * triggerToothAngle) + configPage4.triggerAngle; //Number of teeth that have passed since tooth 1, multiplied by the angle each tooth represents, plus the angle that tooth 1 is ATDC. This gives accuracy only to the nearest tooth.
    }

    //Estimate the number of degrees travelled since the last tooth}
    elapsedTime = (lastCrankAngleCalc - tempToothLastToothTime);
    crankAngle += timeToAngleDegPerMicroSec(elapsedTime);

    if (crankAngle >= 720) { crankAngle -= 720; }
    if (crankAngle < 0) { crankAngle += 360; }

    return crankAngle;
}

void triggerSetEndTeeth_HondaD17(void)
{
}

/** @} */

/** Miata '99 to '05 with 4x 70 degree duration teeth running at cam speed.
Teeth believed to be at the same angles as the 4g63 decoder.
Tooth #1 is defined as the next crank tooth after the crank signal is HIGH when the cam signal is falling.
Tooth number one is at 355* ATDC.
* (See: www.forum.diyefi.org/viewtopic.php?f=56&t=1077)
* @defgroup miata_99_05 Miata '99 to '05
* @{
*/
void triggerSetup_Miata9905(void)
{
  triggerToothAngle = 90; //The number of degrees that passes from tooth to tooth (primary)
  toothCurrentCount = 99; //Fake tooth count represents no sync
  BIT_CLEAR(decoderState, BIT_DECODER_2ND_DERIV);
  BIT_SET(decoderState, BIT_DECODER_IS_SEQUENTIAL);
  triggerActualTeeth = 8;

  if(currentStatus.initialisationComplete == false) { secondaryToothCount = 0; toothLastToothTime = micros(); } //Set a startup value here to avoid filter errors when starting. This MUST have the initial check to prevent the fuel pump just staying on all the time
  else { toothLastToothTime = 0; }
  toothLastMinusOneToothTime = 0;

  //Note that these angles are for every rising and falling edge

  /*
  toothAngles[0] = 350;
  toothAngles[1] = 100;
  toothAngles[2] = 170;
  toothAngles[3] = 280;
  */

  toothAngles[0] = 710; //
  toothAngles[1] = 100; //First crank pulse after the SINGLE cam pulse
  toothAngles[2] = 170; //
  toothAngles[3] = 280; //
  toothAngles[4] = 350; //
  toothAngles[5] = 460; //First crank pulse AFTER the DOUBLE cam pulse
  toothAngles[6] = 530; //
  toothAngles[7] = 640; //

  MAX_STALL_TIME = ((MICROS_PER_DEG_1_RPM/50U) * triggerToothAngle); //Minimum 50rpm. (3333uS is the time per degree at 50rpm)
  triggerFilterTime = 1500; //10000 rpm, assuming we're triggering on both edges off the crank tooth.
  triggerSecFilterTime = 0; //Need to figure out something better for this
  BIT_SET(decoderState, BIT_DECODER_HAS_FIXED_CRANKING);
  BIT_SET(decoderState, BIT_DECODER_TOOTH_ANG_CORRECT);
  BIT_SET(decoderState, BIT_DECODER_HAS_SECONDARY);
}

void triggerPri_Miata9905(void)
{
  curTime = micros();
  curGap = curTime - toothLastToothTime;
  if ( (curGap >= triggerFilterTime) || (currentStatus.startRevolutions == 0) )
  {
    toothCurrentCount++;
    BIT_SET(decoderState, BIT_DECODER_VALID_TRIGGER); //Flag this pulse as being a valid trigger (ie that it passed filters)
    if( (toothCurrentCount == (triggerActualTeeth + 1)) )
    {
       toothCurrentCount = 1; //Reset the counter
       toothOneMinusOneTime = toothOneTime;
       toothOneTime = curTime;
       //currentStatus.hasSync = true;
       currentStatus.startRevolutions++; //Counter
    }
    else
    {
      if( (currentStatus.hasSync == false) || (configPage4.useResync == true) )
      {
        if(secondaryToothCount == 2)
        {
          toothCurrentCount = 6;
          currentStatus.hasSync = true;
        }
      }
    }

    if (currentStatus.hasSync == true)
    {

      //Whilst this is an uneven tooth pattern, if the specific angle between the last 2 teeth is specified, 1st deriv prediction can be used
      if( (configPage4.triggerFilter == 1) || (currentStatus.RPM < 1400) )
      {
        //Lite filter
        if( (toothCurrentCount == 1) || (toothCurrentCount == 3) || (toothCurrentCount == 5) || (toothCurrentCount == 7) ) { triggerToothAngle = 70; triggerFilterTime = curGap; } //Trigger filter is set to whatever time it took to do 70 degrees (Next trigger is 110 degrees away)
        else { triggerToothAngle = 110; triggerFilterTime = (curGap * 3) >> 3; } //Trigger filter is set to (110*3)/8=41.25=41 degrees (Next trigger is 70 degrees away).
      }
      else if(configPage4.triggerFilter == 2)
      {
        //Medium filter level
        if( (toothCurrentCount == 1) || (toothCurrentCount == 3) || (toothCurrentCount == 5) || (toothCurrentCount == 7) ) { triggerToothAngle = 70; triggerFilterTime = (curGap * 5) >> 2 ; } //87.5 degrees with a target of 110
        else { triggerToothAngle = 110; triggerFilterTime = (curGap >> 1); } //55 degrees with a target of 70
      }
      else if (configPage4.triggerFilter == 3)
      {
        //Aggressive filter level
        if( (toothCurrentCount == 1) || (toothCurrentCount == 3) || (toothCurrentCount == 5) || (toothCurrentCount == 7) ) { triggerToothAngle = 70; triggerFilterTime = (curGap * 11) >> 3 ; } //96.26 degrees with a target of 110
        else { triggerToothAngle = 110; triggerFilterTime = (curGap * 9) >> 5; } //61.87 degrees with a target of 70
      }
      else if (configPage4.triggerFilter == 0)
      {
        //trigger filter is turned off.
        triggerFilterTime = 0;
        triggerSecFilterTime = 0;
        if( (toothCurrentCount == 1) || (toothCurrentCount == 3) || (toothCurrentCount == 5) || (toothCurrentCount == 7) ) { triggerToothAngle = 70; } //96.26 degrees with a target of 110
        else { triggerToothAngle = 110; }
      }

      //EXPERIMENTAL!
      //New ignition mode is ONLY available on 9905 when the trigger angle is set to the stock value of 0.
      if(    (configPage2.perToothIgn == true) 
          && (configPage4.triggerAngle == 0) 
          && (currentStatus.advance > 0) )
      {
        int16_t crankAngle = ignitionLimits( toothAngles[(toothCurrentCount-1)] );

        //Handle non-sequential tooth counts 
        if( (configPage4.sparkMode != IGN_MODE_SEQUENTIAL) && (toothCurrentCount > configPage2.nCylinders) ) { checkPerToothTiming(crankAngle, (toothCurrentCount-configPage2.nCylinders) ); }
        else { checkPerToothTiming(crankAngle, toothCurrentCount); }
      }
    } //Has sync

    toothLastMinusOneToothTime = toothLastToothTime;
    toothLastToothTime = curTime;

    //if ( BIT_CHECK(currentStatus.engine, BIT_ENGINE_CRANK) && configPage4.ignCranklock)
    if ( (currentStatus.RPM < (currentStatus.crankRPM + 30)) && (configPage4.ignCranklock) ) //The +30 here is a safety margin. When switching from fixed timing to normal, there can be a situation where a pulse started when fixed and ending when in normal mode causes problems. This prevents that.
    {
      if( (toothCurrentCount == 1) || (toothCurrentCount == 5) ) { endCoil1Charge(); endCoil3Charge(); }
      else if( (toothCurrentCount == 3) || (toothCurrentCount == 7) ) { endCoil2Charge(); endCoil4Charge(); }
    }
    secondaryToothCount = 0;
  } //Trigger filter

}

void triggerSec_Miata9905(void)
{
  curTime2 = micros();
  curGap2 = curTime2 - toothLastSecToothTime;

  if(BIT_CHECK(currentStatus.engine, BIT_ENGINE_CRANK) || (currentStatus.hasSync == false) )
  {
    triggerFilterTime = 1500; //If this is removed, can have trouble getting sync again after the engine is turned off (but ECU not reset).
  }

  if ( curGap2 >= triggerSecFilterTime )
  {
    toothLastSecToothTime = curTime2;
    lastGap = curGap2;
    secondaryToothCount++;

    //TODO Add some secondary filtering here

    //Record the VVT tooth time
    if( (toothCurrentCount == 1) && (curTime2 > toothLastToothTime) )
    {
      lastVVTtime = curTime2 - toothLastToothTime;
    }
  }
}

uint16_t getRPM_Miata9905(void)
{
  //During cranking, RPM is calculated 4 times per revolution, once for each tooth on the crank signal.
  //Because these signals aren't even (Alternating 110 and 70 degrees), this needs a special function
  uint16_t tempRPM = 0;
  if( (currentStatus.RPM < currentStatus.crankRPM) && (currentStatus.hasSync == true) )
  {
    if( (toothLastToothTime == 0) || (toothLastMinusOneToothTime == 0) ) { tempRPM = 0; }
    else
    {
      int tempToothAngle;
      unsigned long toothTime;
      noInterrupts();
      tempToothAngle = triggerToothAngle;
      toothTime = (toothLastToothTime - toothLastMinusOneToothTime); //Note that trigger tooth angle changes between 70 and 110 depending on the last tooth that was seen
      interrupts();
      toothTime = toothTime * 36;
      tempRPM = ((unsigned long)tempToothAngle * (MICROS_PER_MIN/10U)) / toothTime;
      SetRevolutionTime((10UL * toothTime) / tempToothAngle);
      MAX_STALL_TIME = 366667UL; // 50RPM
    }
  }
  else
  {
    tempRPM = stdGetRPM(CAM_SPEED);
    MAX_STALL_TIME = revolutionTime << 1; //Set the stall time to be twice the current RPM. This is a safe figure as there should be no single revolution where this changes more than this
    if(MAX_STALL_TIME < 366667UL) { MAX_STALL_TIME = 366667UL; } //Check for 50rpm minimum
  }

  return tempRPM;
}

int getCrankAngle_Miata9905(void)
{
    int crankAngle = 0;
    //if(currentStatus.hasSync == true)
    {
      //This is the current angle ATDC the engine is at. This is the last known position based on what tooth was last 'seen'. It is only accurate to the resolution of the trigger wheel (Eg 36-1 is 10 degrees)
      unsigned long tempToothLastToothTime;
      int tempToothCurrentCount;
      //Grab some variables that are used in the trigger code and assign them to temp variables.
      noInterrupts();
      tempToothCurrentCount = toothCurrentCount;
      tempToothLastToothTime = toothLastToothTime;
      lastCrankAngleCalc = micros(); //micros() is no longer interrupt safe
      interrupts();

      crankAngle = toothAngles[(tempToothCurrentCount - 1)] + configPage4.triggerAngle; //Perform a lookup of the fixed toothAngles array to find what the angle of the last tooth passed was.

      //Estimate the number of degrees travelled since the last tooth}
      elapsedTime = (lastCrankAngleCalc - tempToothLastToothTime);
      crankAngle += timeToAngleDegPerMicroSec(elapsedTime);

      if (crankAngle >= 720) { crankAngle -= 720; }
      if (crankAngle < 0) { crankAngle += 360; }
    }

    return crankAngle;
}

int getCamAngle_Miata9905(void)
{
  int16_t curAngle;
  //lastVVTtime is the time between tooth #1 (10* BTDC) and the single cam tooth. 
  //All cam angles in in BTDC, so the actual advance angle is 370 - timeToAngleDegPerMicroSec(lastVVTtime) - <the angle of the cam at 0 advance>
  curAngle = 370 - timeToAngleDegPerMicroSec(lastVVTtime) - configPage10.vvtCL0DutyAng;
  currentStatus.vvt1Angle = ANGLE_FILTER( (curAngle << 1), configPage4.ANGLEFILTER_VVT, currentStatus.vvt1Angle);

  return currentStatus.vvt1Angle;
}

void triggerSetEndTeeth_Miata9905(void)
{

  if(configPage4.sparkMode == IGN_MODE_SEQUENTIAL) 
  { 
    if(currentStatus.advance >= 10)
    {
      ignition1EndTooth = 8;
      ignition2EndTooth = 2;
      ignition3EndTooth = 4;
      ignition4EndTooth = 6;
    }
    else if (currentStatus.advance > 0)
    {
      ignition1EndTooth = 1;
      ignition2EndTooth = 3;
      ignition3EndTooth = 5;
      ignition4EndTooth = 7;
    }
    
  }
  else
  {
    if(currentStatus.advance >= 10)
    {
      ignition1EndTooth = 4;
      ignition2EndTooth = 2;
      ignition3EndTooth = 4; //Not used
      ignition4EndTooth = 2; //Not used
    }
    else if(currentStatus.advance > 0)
    {
      ignition1EndTooth = 1;
      ignition2EndTooth = 3;
      ignition3EndTooth = 1; //Not used
      ignition4EndTooth = 3; //Not used
    }
  }
}
/** @} */

/** Mazda AU version.
Tooth #2 is defined as the next crank tooth after the single cam tooth.
Tooth number one is at 348* ATDC.
* @defgroup mazda_au Mazda AU
* @{
*/
void triggerSetup_MazdaAU(void)
{
  triggerToothAngle = 108; //The number of degrees that passes from tooth to tooth (primary). This is the maximum gap
  toothCurrentCount = 99; //Fake tooth count represents no sync
  secondaryToothCount = 0; //Needed for the cam tooth tracking
  BIT_CLEAR(decoderState, BIT_DECODER_2ND_DERIV);
  BIT_SET(decoderState, BIT_DECODER_IS_SEQUENTIAL);

  toothAngles[0] = 348; //tooth #1
  toothAngles[1] = 96; //tooth #2
  toothAngles[2] = 168; //tooth #3
  toothAngles[3] = 276; //tooth #4

  MAX_STALL_TIME = ((MICROS_PER_DEG_1_RPM/50U) * triggerToothAngle); //Minimum 50rpm. (3333uS is the time per degree at 50rpm)
  triggerFilterTime = 1500; //10000 rpm, assuming we're triggering on both edges off the crank tooth.
  triggerSecFilterTime = (int)(MICROS_PER_SEC / (MAX_RPM / 60U * 2U)) / 2U; //Same as above, but fixed at 2 teeth on the secondary input and divided by 2 (for cam speed)
  BIT_SET(decoderState, BIT_DECODER_HAS_FIXED_CRANKING);
  BIT_SET(decoderState, BIT_DECODER_HAS_SECONDARY);
}

void triggerPri_MazdaAU(void)
{
  curTime = micros();
  curGap = curTime - toothLastToothTime;
  if ( curGap >= triggerFilterTime )
  {
    BIT_SET(decoderState, BIT_DECODER_VALID_TRIGGER); //Flag this pulse as being a valid trigger (ie that it passed filters)

    toothCurrentCount++;
    if( (toothCurrentCount == 1) || (toothCurrentCount == 5) ) //Trigger is on CHANGE, hence 4 pulses = 1 crank rev
    {
       toothCurrentCount = 1; //Reset the counter
       toothOneMinusOneTime = toothOneTime;
       toothOneTime = curTime;
       currentStatus.hasSync = true;
       currentStatus.startRevolutions++; //Counter
    }

    if (currentStatus.hasSync == true)
    {
      // Locked cranking timing is available, fixed at 12* BTDC
      if ( BIT_CHECK(currentStatus.engine, BIT_ENGINE_CRANK) && configPage4.ignCranklock )
      {
        if( toothCurrentCount == 1 ) { endCoil1Charge(); }
        else if( toothCurrentCount == 3 ) { endCoil2Charge(); }
      }

      //Whilst this is an uneven tooth pattern, if the specific angle between the last 2 teeth is specified, 1st deriv prediction can be used
      if( (toothCurrentCount == 1) || (toothCurrentCount == 3) ) { triggerToothAngle = 72; triggerFilterTime = curGap; } //Trigger filter is set to whatever time it took to do 72 degrees (Next trigger is 108 degrees away)
      else { triggerToothAngle = 108; triggerFilterTime = (curGap * 3) >> 3; } //Trigger filter is set to (108*3)/8=40 degrees (Next trigger is 70 degrees away).

      toothLastMinusOneToothTime = toothLastToothTime;
      toothLastToothTime = curTime;
    } //Has sync
  } //Filter time
}

void triggerSec_MazdaAU(void)
{
  curTime2 = micros();
  lastGap = curGap2;
  curGap2 = curTime2 - toothLastSecToothTime;
  //if ( curGap2 < triggerSecFilterTime ) { return; }
  toothLastSecToothTime = curTime2;

  //if(BIT_CHECK(currentStatus.engine, BIT_ENGINE_CRANK) || currentStatus.hasSync == false)
  if(currentStatus.hasSync == false)
  {
    //we find sync by looking for the 2 teeth that are close together. The next crank tooth after that is the one we're looking for.
    //For the sake of this decoder, the lone cam tooth will be designated #1
    if(secondaryToothCount == 2)
    {
      toothCurrentCount = 1;
      currentStatus.hasSync = true;
    }
    else
    {
      triggerFilterTime = 1500; //In case the engine has been running and then lost sync.
      targetGap = (lastGap) >> 1; //The target gap is set at half the last tooth gap
      if ( curGap2 < targetGap) //If the gap between this tooth and the last one is less than half of the previous gap, then we are very likely at the extra (3rd) tooth on the cam). This tooth is located at 421 crank degrees (aka 61 degrees) and therefore the last crank tooth seen was number 1 (At 350 degrees)
      {
        secondaryToothCount = 2;
      }
    }
    secondaryToothCount++;
  }
}


uint16_t getRPM_MazdaAU(void)
{
  uint16_t tempRPM = 0;

  if (currentStatus.hasSync == true)
  {
    //During cranking, RPM is calculated 4 times per revolution, once for each tooth on the crank signal.
    //Because these signals aren't even (Alternating 108 and 72 degrees), this needs a special function
    if(currentStatus.RPM < currentStatus.crankRPM)
    {
      int tempToothAngle;
      noInterrupts();
      tempToothAngle = triggerToothAngle;
      SetRevolutionTime(36*(toothLastToothTime - toothLastMinusOneToothTime)); //Note that trigger tooth angle changes between 72 and 108 depending on the last tooth that was seen
      interrupts();
      tempRPM = (tempToothAngle * MICROS_PER_MIN) / revolutionTime;
    }
    else { tempRPM = stdGetRPM(CRANK_SPEED); }
  }
  return tempRPM;
}

int getCrankAngle_MazdaAU(void)
{
    int crankAngle = 0;
    if(currentStatus.hasSync == true)
    {
      //This is the current angle ATDC the engine is at. This is the last known position based on what tooth was last 'seen'. It is only accurate to the resolution of the trigger wheel (Eg 36-1 is 10 degrees)
      unsigned long tempToothLastToothTime;
      int tempToothCurrentCount;
      //Grab some variables that are used in the trigger code and assign them to temp variables.
      noInterrupts();
      tempToothCurrentCount = toothCurrentCount;
      tempToothLastToothTime = toothLastToothTime;
      lastCrankAngleCalc = micros(); //micros() is no longer interrupt safe
      interrupts();

      crankAngle = toothAngles[(tempToothCurrentCount - 1)] + configPage4.triggerAngle; //Perform a lookup of the fixed toothAngles array to find what the angle of the last tooth passed was.

      //Estimate the number of degrees travelled since the last tooth}
      elapsedTime = (lastCrankAngleCalc - tempToothLastToothTime);
      crankAngle += timeToAngleDegPerMicroSec(elapsedTime);

      if (crankAngle >= 720) { crankAngle -= 720; }
      if (crankAngle < 0) { crankAngle += 360; }
    }

    return crankAngle;
}

void triggerSetEndTeeth_MazdaAU(void)
{
}
/** @} */

/** Non-360 Dual wheel with 2 wheels located either both on the crank or with the primary on the crank and the secondary on the cam.
There can be no missing teeth on the primary wheel.
* @defgroup dec_non360 Non-360 Dual wheel
* @{
*/
void triggerSetup_non360(void)
{
  triggerToothAngle = (360U * configPage4.TrigAngMul) / configPage4.triggerTeeth; //The number of degrees that passes from tooth to tooth multiplied by the additional multiplier
  toothCurrentCount = 255; //Default value
  triggerFilterTime = (MICROS_PER_SEC / (MAX_RPM / 60U * configPage4.triggerTeeth)); //Trigger filter time is the shortest possible time (in uS) that there can be between crank teeth (ie at max RPM). Any pulses that occur faster than this time will be discarded as noise
  triggerSecFilterTime = (MICROS_PER_SEC / (MAX_RPM / 60U * 2U)) / 2U; //Same as above, but fixed at 2 teeth on the secondary input and divided by 2 (for cam speed)
  BIT_CLEAR(decoderState, BIT_DECODER_2ND_DERIV);
  BIT_SET(decoderState, BIT_DECODER_IS_SEQUENTIAL);
  BIT_SET(decoderState, BIT_DECODER_HAS_SECONDARY);
  MAX_STALL_TIME = ((MICROS_PER_DEG_1_RPM/50U) * triggerToothAngle); //Minimum 50rpm. (3333uS is the time per degree at 50rpm)
}


void triggerPri_non360(void)
{
  //This is not used, the trigger is identical to the dual wheel one, so that is used instead.
}

void triggerSec_non360(void)
{
  //This is not used, the trigger is identical to the dual wheel one, so that is used instead.
}

uint16_t getRPM_non360(void)
{
  uint16_t tempRPM = 0;
  if( (currentStatus.hasSync == true) && (toothCurrentCount != 0) )
  {
    if(currentStatus.RPM < currentStatus.crankRPM) { tempRPM = crankingGetRPM(configPage4.triggerTeeth, CRANK_SPEED); }
    else { tempRPM = stdGetRPM(CRANK_SPEED); }
  }
  return tempRPM;
}

int getCrankAngle_non360(void)
{
    //This is the current angle ATDC the engine is at. This is the last known position based on what tooth was last 'seen'. It is only accurate to the resolution of the trigger wheel (Eg 36-1 is 10 degrees)
    unsigned long tempToothLastToothTime;
    int tempToothCurrentCount;
    //Grab some variables that are used in the trigger code and assign them to temp variables.
    noInterrupts();
    tempToothCurrentCount = toothCurrentCount;
    tempToothLastToothTime = toothLastToothTime;
    lastCrankAngleCalc = micros(); //micros() is no longer interrupt safe
    interrupts();

    //Handle case where the secondary tooth was the last one seen
    if(tempToothCurrentCount == 0) { tempToothCurrentCount = configPage4.triggerTeeth; }

    //Number of teeth that have passed since tooth 1, multiplied by the angle each tooth represents, plus the angle that tooth 1 is ATDC. This gives accuracy only to the nearest tooth.
    int crankAngle = (tempToothCurrentCount - 1) * triggerToothAngle;
    crankAngle = (crankAngle / configPage4.TrigAngMul) + configPage4.triggerAngle; //Have to divide by the multiplier to get back to actual crank angle.

    //Estimate the number of degrees travelled since the last tooth}
    elapsedTime = (lastCrankAngleCalc - tempToothLastToothTime);
    crankAngle += timeToAngleDegPerMicroSec(elapsedTime);

    if (crankAngle >= 720) { crankAngle -= 720; }
    if (crankAngle < 0) { crankAngle += 360; }

    return crankAngle;
}

void triggerSetEndTeeth_non360(void)
{
}
/** @} */

/** Nissan 360 tooth on cam (Optical trigger disc inside distributor housing).
See http://wiki.r31skylineclub.com/index.php/Crank_Angle_Sensor .
* @defgroup dec_nissan360 Nissan 360 tooth on cam
* @{
*/
void triggerSetup_Nissan360(void)
{
  triggerFilterTime = (MICROS_PER_SEC / (MAX_RPM / 60U * 360UL)); //Trigger filter time is the shortest possible time (in uS) that there can be between crank teeth (ie at max RPM). Any pulses that occur faster than this time will be discarded as noise
  triggerSecFilterTime = (int)(MICROS_PER_SEC / (MAX_RPM / 60U * 2U)) / 2U; //Same as above, but fixed at 2 teeth on the secondary input and divided by 2 (for cam speed)
  secondaryToothCount = 0; //Initially set to 0 prior to calculating the secondary window duration
  BIT_CLEAR(decoderState, BIT_DECODER_2ND_DERIV);
  BIT_SET(decoderState, BIT_DECODER_IS_SEQUENTIAL);
  BIT_SET(decoderState, BIT_DECODER_HAS_SECONDARY);
  toothCurrentCount = 1;
  triggerToothAngle = 2;
  MAX_STALL_TIME = ((MICROS_PER_DEG_1_RPM/50U) * triggerToothAngle); //Minimum 50rpm. (3333uS is the time per degree at 50rpm)
}


void triggerPri_Nissan360(void)
{
   curTime = micros();
   curGap = curTime - toothLastToothTime;
   //if ( curGap < triggerFilterTime ) { return; }
   toothCurrentCount++; //Increment the tooth counter
   BIT_SET(decoderState, BIT_DECODER_VALID_TRIGGER); //Flag this pulse as being a valid trigger (ie that it passed filters)

   toothLastMinusOneToothTime = toothLastToothTime;
   toothLastToothTime = curTime;

   if ( currentStatus.hasSync == true )
   {
     if ( toothCurrentCount == 361 ) //2 complete crank revolutions
     {
       toothCurrentCount = 1;
       toothOneMinusOneTime = toothOneTime;
       toothOneTime = curTime;
       currentStatus.startRevolutions++; //Counter
     }
     //Recalc the new filter value
     //setFilter(curGap);

     //EXPERIMENTAL!
     if(configPage2.perToothIgn == true)
     {
        int16_t crankAngle = ( (toothCurrentCount-1) * 2 ) + configPage4.triggerAngle;
        if(crankAngle > CRANK_ANGLE_MAX_IGN) 
        { 
          crankAngle -= CRANK_ANGLE_MAX_IGN;
          checkPerToothTiming(crankAngle, (toothCurrentCount/2) );
        }
        else
        {
          checkPerToothTiming(crankAngle, toothCurrentCount);
        }
       
     }
   }
}

void triggerSec_Nissan360(void)
{
  curTime2 = micros();
  curGap2 = curTime2 - toothLastSecToothTime;
  //if ( curGap2 < triggerSecFilterTime ) { return; }
  toothLastSecToothTime = curTime2;
  //OPTIONAL: Set filter at 25% of the current speed
  //triggerSecFilterTime = curGap2 >> 2;


  //Calculate number of primary teeth that this window has been active for
  byte trigEdge;
  if(configPage4.TrigEdgeSec == 0) { trigEdge = LOW; }
  else { trigEdge = HIGH; }

  if( (secondaryToothCount == 0) || (READ_SEC_TRIGGER() == trigEdge) ) { secondaryToothCount = toothCurrentCount; } //This occurs on the first rotation upon powerup OR the start of a secondary window
  else
  {
    //If we reach here, we are at the end of a secondary window
    byte secondaryDuration = toothCurrentCount - secondaryToothCount; //How many primary teeth have passed during the duration of this secondary window

    if(currentStatus.hasSync == false)
    {
      if(configPage2.nCylinders == 4)
      {
        //Supported pattern is where all the inner windows as a different size (Most SR engines)
        //These equate to 4,8,12,16 teeth spacings
        if( (secondaryDuration >= 15) && (secondaryDuration <= 17) ) //Duration of window = 16 primary teeth
        {
          toothCurrentCount = 16; //End of first window (The longest) occurs 16 teeth after TDC
          currentStatus.hasSync = true;
        }
        else if( (secondaryDuration >= 11) && (secondaryDuration <= 13) ) //Duration of window = 12 primary teeth
        {
          toothCurrentCount = 102; //End of second window is after 90+12 primary teeth
          currentStatus.hasSync = true;
        }
        else if( (secondaryDuration >= 7) && (secondaryDuration <= 9) ) //Duration of window = 8 primary teeth
        {
          toothCurrentCount = 188; //End of third window is after 90+90+8 primary teeth
          currentStatus.hasSync = true;
        }
        else if( (secondaryDuration >= 3) && (secondaryDuration <= 5) ) //Duration of window = 4 primary teeth
        {
          toothCurrentCount = 274; //End of fourth window is after 90+90+90+4 primary teeth
          currentStatus.hasSync = true;
        }
        else { currentStatus.hasSync = false; currentStatus.syncLossCounter++; } //This should really never happen
      }
      else if(configPage2.nCylinders == 6)
      {
        //Pattern on the 6 cylinders is 4-8-12-16-20-24
        if( (secondaryDuration >= 3) && (secondaryDuration <= 5) ) //Duration of window = 4 primary teeth
        {
          toothCurrentCount = 124; //End of smallest window is after 60+60+4 primary teeth
          currentStatus.hasSync = true;
        }
      }
      else if(configPage2.nCylinders == 8)
      {
        //V8 Optispark
        //Pattern on the 8 cylinders is the same as the 6 cylinder 4-8-12-16-20-24
        if( (secondaryDuration >= 6) && (secondaryDuration <= 8) ) //Duration of window = 16 primary teeth
        {
          toothCurrentCount = 56; //End of the shortest of the individual windows. Occurs at 102 crank degrees. 
          currentStatus.hasSync = true;
        }
      }
      else { currentStatus.hasSync = false; } //This should really never happen (Only 4, 6 and 8 cylinder engines for this pattern)
    }
    else
    {
      if (configPage4.useResync == true)
      {
        //Already have sync, but do a verify every 720 degrees.
        if(configPage2.nCylinders == 4)
        {
          if( (secondaryDuration >= 15) && (secondaryDuration <= 17) ) //Duration of window = 16 primary teeth
          {
            toothCurrentCount = 16; //End of first window (The longest) occurs 16 teeth after TDC
          }
        }
        else if(configPage2.nCylinders == 6)
        {
          if(secondaryDuration == 4)
          {
            //toothCurrentCount = 304;
          }
        } //Cylinder count
      } //use resync
    } //Has sync
  } //First getting sync or not
}

uint16_t getRPM_Nissan360(void)
{
  //Can't use stdGetRPM as there is no separate cranking RPM calc (stdGetRPM returns 0 if cranking)
  uint16_t tempRPM;
  if( (currentStatus.hasSync == true) && (toothLastToothTime != 0) && (toothLastMinusOneToothTime != 0) )
  {
    if(currentStatus.startRevolutions < 2)
    {
      noInterrupts();
      SetRevolutionTime((toothLastToothTime - toothLastMinusOneToothTime) * 180); //Each tooth covers 2 crank degrees, so multiply by 180 to get a full revolution time. 
      interrupts();
    }
    else
    {
      noInterrupts();
      SetRevolutionTime((toothOneTime - toothOneMinusOneTime) >> 1); //The time in uS that one revolution would take at current speed (The time tooth 1 was last seen, minus the time it was seen prior to that)
      interrupts();
    }
    tempRPM = RpmFromRevolutionTimeUs(revolutionTime); //Calc RPM based on last full revolution time (Faster as /)
    MAX_STALL_TIME = revolutionTime << 1; //Set the stall time to be twice the current RPM. This is a safe figure as there should be no single revolution where this changes more than this
  }
  else { tempRPM = 0; }

  return tempRPM;
}

int getCrankAngle_Nissan360(void)
{
  //As each tooth represents 2 crank degrees, we only need to determine whether we're more or less than halfway between teeth to know whether to add another 1 degrees
  int crankAngle = 0;
  int tempToothLastToothTime;
  int tempToothLastMinusOneToothTime;
  int tempToothCurrentCount;

  noInterrupts();
  tempToothLastToothTime = toothLastToothTime;
  tempToothLastMinusOneToothTime = toothLastMinusOneToothTime;
  tempToothCurrentCount = toothCurrentCount;
  lastCrankAngleCalc = micros(); //micros() is no longer interrupt safe
  interrupts();

  crankAngle = ( (tempToothCurrentCount - 1) * 2) + configPage4.triggerAngle;
  unsigned long halfTooth = (tempToothLastToothTime - tempToothLastMinusOneToothTime) / 2;
  elapsedTime = (lastCrankAngleCalc - tempToothLastToothTime);
  if (elapsedTime > halfTooth)
  {
    //Means we're over halfway to the next tooth, so add on 1 degree
    crankAngle += 1;
  }

  if (crankAngle >= 720) { crankAngle -= 720; }
  if (crankAngle < 0) { crankAngle += 360; }

  return crankAngle;
}

void triggerSetEndTeeth_Nissan360(void)
{
  //This uses 4 prior teeth, just to ensure there is sufficient time to set the schedule etc
  byte offset_teeth = 4;
  if((ignition1EndAngle - offset_teeth) > configPage4.triggerAngle) { ignition1EndTooth = ( (ignition1EndAngle - configPage4.triggerAngle) / 2 ) - offset_teeth; }
  else { ignition1EndTooth = ( (ignition1EndAngle + 720 - configPage4.triggerAngle) / 2 ) - offset_teeth; }
  if((ignition2EndAngle - offset_teeth) > configPage4.triggerAngle) { ignition2EndTooth = ( (ignition2EndAngle - configPage4.triggerAngle) / 2 ) - offset_teeth; }
  else { ignition2EndTooth = ( (ignition2EndAngle + 720 - configPage4.triggerAngle) / 2 ) - offset_teeth; }
  if((ignition3EndAngle - offset_teeth) > configPage4.triggerAngle) { ignition3EndTooth = ( (ignition3EndAngle - configPage4.triggerAngle) / 2 ) - offset_teeth; }
  else { ignition3EndTooth = ( (ignition3EndAngle + 720 - configPage4.triggerAngle) / 2 ) - offset_teeth; }
  if((ignition4EndAngle - offset_teeth) > configPage4.triggerAngle) { ignition4EndTooth = ( (ignition4EndAngle - configPage4.triggerAngle) / 2 ) - offset_teeth; }
  else { ignition4EndTooth = ( (ignition4EndAngle + 720 - configPage4.triggerAngle) / 2 ) - offset_teeth; }
}
/** @} */

/** Subaru 6/7 Trigger pattern decoder for 6 tooth (irregularly spaced) crank and 7 tooth (also fairly irregular) cam wheels (eg late 90's Impreza 2.2).
This seems to be present in late 90's Subaru. In 2001 Subaru moved to 36-2-2-2 (See: http://www.vems.hu/wiki/index.php?page=InputTrigger%2FSubaruTrigger ).
* @defgroup dec_subaru_6_7 Subaru 6/7
* @{
*/
void triggerSetup_Subaru67(void)
{
  triggerFilterTime = (MICROS_PER_SEC / (MAX_RPM / 60U * 360UL)); //Trigger filter time is the shortest possible time (in uS) that there can be between crank teeth (ie at max RPM). Any pulses that occur faster than this time will be discarded as noise
  triggerSecFilterTime = 0;
  secondaryToothCount = 0; //Initially set to 0 prior to calculating the secondary window duration
  BIT_CLEAR(decoderState, BIT_DECODER_2ND_DERIV);
  BIT_SET(decoderState, BIT_DECODER_IS_SEQUENTIAL);
  BIT_SET(decoderState, BIT_DECODER_HAS_SECONDARY);
  toothCurrentCount = 1;
  triggerToothAngle = 2;
  BIT_CLEAR(decoderState, BIT_DECODER_TOOTH_ANG_CORRECT);
  toothSystemCount = 0;
  MAX_STALL_TIME = ((MICROS_PER_DEG_1_RPM/50U) * 93U); //Minimum 50rpm. (3333uS is the time per degree at 50rpm)

  toothAngles[0] = 710; //tooth #1
  toothAngles[1] = 83; //tooth #2
  toothAngles[2] = 115; //tooth #3
  toothAngles[3] = 170; //tooth #4
  toothAngles[4] = toothAngles[1] + 180;
  toothAngles[5] = toothAngles[2] + 180;
  toothAngles[6] = toothAngles[3] + 180;
  toothAngles[7] = toothAngles[1] + 360;
  toothAngles[8] = toothAngles[2] + 360;
  toothAngles[9] = toothAngles[3] + 360;
  toothAngles[10] = toothAngles[1] + 540;
  toothAngles[11] = toothAngles[2] + 540;
}


void triggerPri_Subaru67(void)
{
  curTime = micros();
  curGap = curTime - toothLastToothTime;
  if ( curGap < triggerFilterTime ) 
  { return; }

  toothCurrentCount++; //Increment the tooth counter
  toothSystemCount++; //Used to count the number of primary pulses that have occurred since the last secondary. Is part of the noise filtering system.
  BIT_SET(decoderState, BIT_DECODER_VALID_TRIGGER); //Flag this pulse as being a valid trigger (ie that it passed filters)

  toothLastMinusOneToothTime = toothLastToothTime;
  toothLastToothTime = curTime;

 
  if(toothCurrentCount > 13) //can't have more than 12 teeth so have lost sync 
  {
    toothCurrentCount = 0; 
    currentStatus.hasSync = false; 
    currentStatus.syncLossCounter++;
  } 

  //Sync is determined by counting the number of cam teeth that have passed between the crank teeth
  switch(secondaryToothCount)
  {
    case 0:
      //If no teeth have passed, we can't do anything
      break;

    case 1:
      //Can't do anything with a single pulse from the cam either (We need either 2 or 3 pulses)
      if(toothCurrentCount == 5 || toothCurrentCount == 11)
      { currentStatus.hasSync = true; }
      else
      { 
        currentStatus.hasSync = false; 
        currentStatus.syncLossCounter++;     
        toothCurrentCount = 5; // we don't know if its 5 or 11, but we'll be right 50% of the time and speed up getting sync 50%
      }
      secondaryToothCount = 0;
      break;

    case 2:
      if (toothCurrentCount == 8)  
      {  currentStatus.hasSync = true; }
      else
      { 
        currentStatus.hasSync = false;
        currentStatus.syncLossCounter++;
        toothCurrentCount = 8;
      }          
      secondaryToothCount = 0;
      break;

    case 3:      
      if( toothCurrentCount == 2)
      {  currentStatus.hasSync = true; }
      else
      {  
        currentStatus.hasSync = false; 
        currentStatus.syncLossCounter++;
        toothCurrentCount = 2;
      }
      secondaryToothCount = 0;
      break;

    default:
      //Almost certainly due to noise or cranking stop/start
      currentStatus.hasSync = false;
      BIT_CLEAR(decoderState, BIT_DECODER_TOOTH_ANG_CORRECT);
      currentStatus.syncLossCounter++;
      secondaryToothCount = 0;
      break;
  }

  //Check sync again
  if ( currentStatus.hasSync == true )
  {
    //Locked timing during cranking. This is fixed at 10* BTDC.
    if ( BIT_CHECK(currentStatus.engine, BIT_ENGINE_CRANK) && configPage4.ignCranklock)
    {
      if( (toothCurrentCount == 1) || (toothCurrentCount == 7) ) { endCoil1Charge(); endCoil3Charge(); }
      else if( (toothCurrentCount == 4) || (toothCurrentCount == 10) ) { endCoil2Charge(); endCoil4Charge(); }
    }

    if ( toothCurrentCount > 12 ) // done 720 degrees so increment rotation
    {
      toothCurrentCount = 1;
      toothOneMinusOneTime = toothOneTime;
      toothOneTime = curTime;
      currentStatus.startRevolutions++; //Counter
    }

    //Set the last angle between teeth for better calc accuracy
    if(toothCurrentCount == 1) { triggerToothAngle = 55; } //Special case for tooth 1
    else if(toothCurrentCount == 2) { triggerToothAngle = 93; } //Special case for tooth 2
    else { triggerToothAngle = toothAngles[(toothCurrentCount-1)] - toothAngles[(toothCurrentCount-2)]; }
    BIT_SET(decoderState, BIT_DECODER_TOOTH_ANG_CORRECT);


    //NEW IGNITION MODE
    if( (configPage2.perToothIgn == true) && (!BIT_CHECK(currentStatus.engine, BIT_ENGINE_CRANK)) ) 
    {
      int16_t crankAngle = toothAngles[(toothCurrentCount - 1)] + configPage4.triggerAngle;
      if( (configPage4.sparkMode != IGN_MODE_SEQUENTIAL) )
      {
        crankAngle = ignitionLimits( toothAngles[(toothCurrentCount-1)] );

        //Handle non-sequential tooth counts 
        if( (configPage4.sparkMode != IGN_MODE_SEQUENTIAL) && (toothCurrentCount > 6) ) { checkPerToothTiming(crankAngle, (toothCurrentCount-6) ); }
        else { checkPerToothTiming(crankAngle, toothCurrentCount); }
      }
      else{ checkPerToothTiming(crankAngle, toothCurrentCount); }
    }
  //Recalc the new filter value
  //setFilter(curGap);
  }
 }

void triggerSec_Subaru67(void)
{
  if( ((toothSystemCount == 0) || (toothSystemCount == 3)) )
  {
    curTime2 = micros();
    curGap2 = curTime2 - toothLastSecToothTime;
    
    if ( curGap2 > triggerSecFilterTime ) 
    {
      toothLastSecToothTime = curTime2;
      secondaryToothCount++;
      toothSystemCount = 0;
      
      if(secondaryToothCount > 1)
      {
        //Set filter at 25% of the current speed
        //Note that this can only be set on the 2nd or 3rd cam tooth in each set. 
        triggerSecFilterTime = curGap2 >> 2;
      }
      else { triggerSecFilterTime = 0; } //Filter disabled  

    }
  }
  else
  {
    //Sanity check
    if(toothSystemCount > 3)
    { 
      toothSystemCount = 0; 
      secondaryToothCount = 1;
      currentStatus.hasSync = false; // impossible to have more than 3 crank teeth between cam teeth - must have noise but can't have sync
      currentStatus.syncLossCounter++;
    }
    secondaryToothCount = 0;
  }

}

uint16_t getRPM_Subaru67(void)
{
  //if(currentStatus.RPM < currentStatus.crankRPM) { return crankingGetRPM(configPage4.triggerTeeth); }

  uint16_t tempRPM = 0;
  if(currentStatus.startRevolutions > 0)
  {
    //As the tooth count is over 720 degrees
    tempRPM = stdGetRPM(CAM_SPEED);
  }
  return tempRPM;
}

int getCrankAngle_Subaru67(void)
{
  int crankAngle = 0;
  if( currentStatus.hasSync == true )
  {
    //This is the current angle ATDC the engine is at. This is the last known position based on what tooth was last 'seen'. It is only accurate to the resolution of the trigger wheel (Eg 36-1 is 10 degrees)
    unsigned long tempToothLastToothTime;
    int tempToothCurrentCount;
    //Grab some variables that are used in the trigger code and assign them to temp variables.
    noInterrupts();
    tempToothCurrentCount = toothCurrentCount;
    tempToothLastToothTime = toothLastToothTime;
    lastCrankAngleCalc = micros(); //micros() is no longer interrupt safe
    interrupts();

    crankAngle = toothAngles[(tempToothCurrentCount - 1)] + configPage4.triggerAngle; //Perform a lookup of the fixed toothAngles array to find what the angle of the last tooth passed was.

    //Estimate the number of degrees travelled since the last tooth}
    elapsedTime = (lastCrankAngleCalc - tempToothLastToothTime);
    crankAngle += timeToAngleIntervalTooth(elapsedTime);

    if (crankAngle >= 720) { crankAngle -= 720; }
    if (crankAngle < 0) { crankAngle += 360; }
  }

  return crankAngle;
}

void triggerSetEndTeeth_Subaru67(void)
{
  if(configPage4.sparkMode == IGN_MODE_SEQUENTIAL)
  {
    //if(ignition1EndAngle < 710) { ignition1EndTooth = 12; }
    if(currentStatus.advance >= 10 ) 
    { 
      ignition1EndTooth = 12;
      ignition2EndTooth = 3;
      ignition3EndTooth = 6;
      ignition4EndTooth = 9;
    }
    else 
    { 
      ignition1EndTooth = 1;
      ignition2EndTooth = 4;
      ignition3EndTooth = 7;
      ignition4EndTooth = 10;
    }
  }
  else    
  {
    if(currentStatus.advance >= 10 ) 
    { 
      ignition1EndTooth = 6;
      ignition2EndTooth = 3;
      //ignition3EndTooth = 6;
      //ignition4EndTooth = 9;
    }
    else 
    { 
      ignition1EndTooth = 1;
      ignition2EndTooth = 4;
      //ignition3EndTooth = 7;
      //ignition4EndTooth = 10;
    }
  }
}
/** @} */

/** Daihatsu +1 trigger for 3 and 4 cylinder engines.
* Tooth equal to the number of cylinders are evenly spaced on the cam. No position sensing (Distributor is retained),
* so crank angle is a made up figure based purely on the first teeth to be seen.
* Note: This is a very simple decoder. See http://www.megamanual.com/ms2/GM_7pinHEI.htm
* @defgroup dec_daihatsu Daihatsu (3  and 4 cyl.)
* @{
*/
void triggerSetup_Daihatsu(void)
{
  triggerActualTeeth = configPage2.nCylinders + 1;
  triggerToothAngle = 720 / triggerActualTeeth; //The number of degrees that passes from tooth to tooth
  triggerFilterTime = MICROS_PER_MIN / MAX_RPM / configPage2.nCylinders; // Minimum time required between teeth
  triggerFilterTime = triggerFilterTime / 2; //Safety margin
  BIT_CLEAR(decoderState, BIT_DECODER_2ND_DERIV);
  BIT_SET(decoderState, BIT_DECODER_IS_SEQUENTIAL);
  BIT_CLEAR(decoderState, BIT_DECODER_HAS_SECONDARY);

  MAX_STALL_TIME = ((MICROS_PER_DEG_1_RPM/90U) * triggerToothAngle)*4U;//Minimum 90rpm. (1851uS is the time per degree at 90rpm). This uses 90rpm rather than 50rpm due to the potentially very high stall time on a 4 cylinder if we wait that long.

  if(configPage2.nCylinders == 3)
  {
    toothAngles[0] = 0; //tooth #1
    toothAngles[1] = 30; //tooth #2 (Extra tooth)
    toothAngles[2] = 240; //tooth #3
    toothAngles[3] = 480; //tooth #4
  }
  else
  {
    //Should be 4 cylinders here
    toothAngles[0] = 0; //tooth #1
    toothAngles[1] = 30; //tooth #2 (Extra tooth)
    toothAngles[2] = 180; //tooth #3
    toothAngles[3] = 360; //tooth #4
    toothAngles[4] = 540; //tooth #5
  }
}

void triggerPri_Daihatsu(void)
{
  curTime = micros();
  curGap = curTime - toothLastToothTime;

  //if ( curGap >= triggerFilterTime || (currentStatus.startRevolutions == 0 )
  {
    toothSystemCount++;
    BIT_SET(decoderState, BIT_DECODER_VALID_TRIGGER); //Flag this pulse as being a valid trigger (ie that it passed filters)

    if (currentStatus.hasSync == true)
    {
      if( (toothCurrentCount == triggerActualTeeth) ) //Check if we're back to the beginning of a revolution
      {
         toothCurrentCount = 1; //Reset the counter
         toothOneMinusOneTime = toothOneTime;
         toothOneTime = curTime;
         currentStatus.hasSync = true;
         currentStatus.startRevolutions++; //Counter

         //Need to set a special filter time for the next tooth
         triggerFilterTime = 20; //Fix this later
      }
      else
      {
        toothCurrentCount++; //Increment the tooth counter
        setFilter(curGap); //Recalc the new filter value
      }

      if ( configPage4.ignCranklock && BIT_CHECK(currentStatus.engine, BIT_ENGINE_CRANK) )
      {
        //This locks the cranking timing to 0 degrees BTDC (All the triggers allow for)
        if(toothCurrentCount == 1) { endCoil1Charge(); }
        else if(toothCurrentCount == 2) { endCoil2Charge(); }
        else if(toothCurrentCount == 3) { endCoil3Charge(); }
        else if(toothCurrentCount == 4) { endCoil4Charge(); }
      }
    }
    else //NO SYNC
    {
      //
      if(toothSystemCount >= 3) //Need to have seen at least 3 teeth to determine SYNC
      {
        unsigned long targetTime;
        //We need to try and find the extra tooth (#2) which is located 30 degrees after tooth #1
        //Aim for tooth times less than about 60 degrees
        if(configPage2.nCylinders == 3)
        {
          targetTime = (toothLastToothTime -  toothLastMinusOneToothTime) / 4; //Teeth are 240 degrees apart for 3 cylinder. 240/4 = 60
        }
        else
        {
          targetTime = ((toothLastToothTime -  toothLastMinusOneToothTime) * 3) / 8; //Teeth are 180 degrees apart for 4 cylinder. (180*3)/8 = 67
        }
        if(curGap < targetTime)
        {
          //Means we're on the extra tooth here
          toothCurrentCount = 2; //Reset the counter
          currentStatus.hasSync = true;
          triggerFilterTime = targetTime; //Lazy, but it works
        }
      }
    }

    toothLastMinusOneToothTime = toothLastToothTime;
    toothLastToothTime = curTime;
  } //Trigger filter
}
void triggerSec_Daihatsu(void) { return; } //Not required (Should never be called in the first place)

uint16_t getRPM_Daihatsu(void)
{
  uint16_t tempRPM = 0;
  if( (currentStatus.RPM < currentStatus.crankRPM) && false) //Disable special cranking processing for now
  {
    //Can't use standard cranking RPM function due to extra tooth
    if( currentStatus.hasSync == true )
    {
      if(toothCurrentCount == 2) { tempRPM = currentStatus.RPM; }
      else if (toothCurrentCount == 3) { tempRPM = currentStatus.RPM; }
      else
      {
        noInterrupts();
        SetRevolutionTime((toothLastToothTime - toothLastMinusOneToothTime) * (triggerActualTeeth-1));
        interrupts();
        tempRPM = RpmFromRevolutionTimeUs(revolutionTime);
      } //is tooth #2
    }
    else { tempRPM = 0; } //No sync
  }
  else
  { tempRPM = stdGetRPM(CAM_SPEED); } //Tracking over 2 crank revolutions

  return tempRPM;

}
int getCrankAngle_Daihatsu(void)
{
    //This is the current angle ATDC the engine is at. This is the last known position based on what tooth was last 'seen'. It is only accurate to the resolution of the trigger wheel (Eg 36-1 is 10 degrees)
    unsigned long tempToothLastToothTime;
    int tempToothCurrentCount;
    int crankAngle;
    //Grab some variables that are used in the trigger code and assign them to temp variables.
    noInterrupts();
    tempToothCurrentCount = toothCurrentCount;
    tempToothLastToothTime = toothLastToothTime;
    lastCrankAngleCalc = micros(); //micros() is no longer interrupt safe
    interrupts();

    crankAngle = toothAngles[tempToothCurrentCount-1] + configPage4.triggerAngle; //Crank angle of the last tooth seen

    //Estimate the number of degrees travelled since the last tooth}
    elapsedTime = (lastCrankAngleCalc - tempToothLastToothTime);
    crankAngle += timeToAngleDegPerMicroSec(elapsedTime);

    if (crankAngle >= 720) { crankAngle -= 720; }
    if (crankAngle < 0) { crankAngle += CRANK_ANGLE_MAX; }

    return crankAngle;
}

void triggerSetEndTeeth_Daihatsu(void)
{
}
/** @} */

/** Harley Davidson (V2) with 2 unevenly Spaced Teeth.
Within the decoder code, the sync tooth is referred to as tooth #1. Derived from GMX7 and adapted for Harley.
Only rising Edge is used for simplicity.The second input is ignored, as it does not help to resolve cam position.
* @defgroup dec_harley Harley Davidson
* @{
*/
void triggerSetup_Harley(void)
{
  triggerToothAngle = 0; // The number of degrees that passes from tooth to tooth, ev. 0. It alternates uneven
  BIT_CLEAR(decoderState, BIT_DECODER_2ND_DERIV);
  BIT_CLEAR(decoderState, BIT_DECODER_IS_SEQUENTIAL);
  BIT_CLEAR(decoderState, BIT_DECODER_HAS_SECONDARY);
  MAX_STALL_TIME = ((MICROS_PER_DEG_1_RPM/50U) * 60U); //Minimum 50rpm. (3333uS is the time per degree at 50rpm)
  if(currentStatus.initialisationComplete == false) { toothLastToothTime = micros(); } //Set a startup value here to avoid filter errors when starting. This MUST have the initial check to prevent the fuel pump just staying on all the time
  triggerFilterTime = 1500;
}

void triggerPri_Harley(void)
{
  lastGap = curGap;
  curTime = micros();
  curGap = curTime - toothLastToothTime;
  setFilter(curGap); // Filtering adjusted according to setting
  if (curGap > triggerFilterTime)
  {
    if ( READ_PRI_TRIGGER() == HIGH) // Has to be the same as in main() trigger-attach, for readability we do it this way.
    {
        BIT_SET(decoderState, BIT_DECODER_VALID_TRIGGER); //Flag this pulse as being a valid trigger (ie that it passed filters)
        targetGap = lastGap ; //Gap is the Time to next toothtrigger, so we know where we are
        toothCurrentCount++;
        if (curGap > targetGap)
        {
          toothCurrentCount = 1;
          triggerToothAngle = 0;// Has to be equal to Angle Routine
          toothOneMinusOneTime = toothOneTime;
          toothOneTime = curTime;
          currentStatus.hasSync = true;
        }
        else
        {
          toothCurrentCount = 2;
          triggerToothAngle = 157;
          //     toothOneMinusOneTime = toothOneTime;
          //     toothOneTime = curTime;
        }
        toothLastMinusOneToothTime = toothLastToothTime;
        toothLastToothTime = curTime;
        currentStatus.startRevolutions++; //Counter
    }
    else
    {
      if (currentStatus.hasSync == true) { currentStatus.syncLossCounter++; }
      currentStatus.hasSync = false;
      toothCurrentCount = 0;
    } //Primary trigger high
  } //Trigger filter
}


void triggerSec_Harley(void)
// Needs to be enabled in main()
{
  return;// No need for now. The only thing it could help to sync more quickly or confirm position.
} // End Sec Trigger


uint16_t getRPM_Harley(void)
{
  uint16_t tempRPM = 0;
  if (currentStatus.hasSync == true)
  {
    if ( currentStatus.RPM < (unsigned int)(configPage4.crankRPM * 100) )
    {
      // No difference with this option?
      int tempToothAngle;
      unsigned long toothTime;
      if ( (toothLastToothTime == 0) || (toothLastMinusOneToothTime == 0) ) { tempRPM = 0; }
      else
      {
        noInterrupts();
        tempToothAngle = triggerToothAngle;
        /* High-res mode
          if(toothCurrentCount == 1) { tempToothAngle = 129; }
          else { tempToothAngle = toothAngles[toothCurrentCount-1] - toothAngles[toothCurrentCount-2]; }
        */
        SetRevolutionTime(toothOneTime - toothOneMinusOneTime); //The time in uS that one revolution would take at current speed (The time tooth 1 was last seen, minus the time it was seen prior to that)
        toothTime = (toothLastToothTime - toothLastMinusOneToothTime); //Note that trigger tooth angle changes between 129 and 332 depending on the last tooth that was seen
        interrupts();
        toothTime = toothTime * 36;
        tempRPM = ((unsigned long)tempToothAngle * (MICROS_PER_MIN/10U)) / toothTime;
      }
    }
    else {
      tempRPM = stdGetRPM(CRANK_SPEED);
    }
  }
  return tempRPM;
}


int getCrankAngle_Harley(void)
{
  //This is the current angle ATDC the engine is at. This is the last known position based on what tooth was last 'seen'. It is only accurate to the resolution of the trigger wheel (Eg 36-1 is 10 degrees)
  unsigned long tempToothLastToothTime;
  int tempToothCurrentCount;
  //Grab some variables that are used in the trigger code and assign them to temp variables.
  noInterrupts();
  tempToothCurrentCount = toothCurrentCount;
  tempToothLastToothTime = toothLastToothTime;
  lastCrankAngleCalc = micros(); //micros() is no longer interrupt safe
  interrupts();

  //Check if the last tooth seen was the reference tooth (Number 3). All others can be calculated, but tooth 3 has a unique angle
  int crankAngle;
  if ( (tempToothCurrentCount == 1) || (tempToothCurrentCount == 3) )
  {
    crankAngle = 0 + configPage4.triggerAngle; //Number of teeth that have passed since tooth 1, multiplied by the angle each tooth represents, plus the angle that tooth 1 is ATDC. This gives accuracy only to the nearest tooth.
  }
  else {
    crankAngle = 157 + configPage4.triggerAngle;
  }

  //Estimate the number of degrees travelled since the last tooth}
  elapsedTime = (lastCrankAngleCalc - tempToothLastToothTime);
  crankAngle += timeToAngleDegPerMicroSec(elapsedTime);

  if (crankAngle >= 720) { crankAngle -= 720; }
  if (crankAngle < 0) { crankAngle += 360; }

  return crankAngle;
}

void triggerSetEndTeeth_Harley(void)
{
}
/** @} */

//************************************************************************************************************************

/** 36-2-2-2 crank based trigger wheel.
* A crank based trigger with a nominal 36 teeth, but 6 of these removed in 3 groups of 2.
* 2 of these groups are located concurrently.
* Note: This decoder supports both the H4 version (13-missing-16-missing-1-missing) and the H6 version of 36-2-2-2 (19-missing-10-missing-1-missing).
* The decoder checks which pattern is selected in order to determine the tooth number
* Note: www.thefactoryfiveforum.com/attachment.php?attachmentid=34279&d=1412431418
* 
* @defgroup dec_36_2_2_2 36-2-2-2 Trigger wheel
* @{
*/
void triggerSetup_ThirtySixMinus222(void)
{
  triggerToothAngle = 10; //The number of degrees that passes from tooth to tooth
  triggerActualTeeth = 30; //The number of physical teeth on the wheel. Doing this here saves us a calculation each time in the interrupt
  triggerFilterTime = (int)(MICROS_PER_SEC / (MAX_RPM / 60U * 36)); //Trigger filter time is the shortest possible time (in uS) that there can be between crank teeth (ie at max RPM). Any pulses that occur faster than this time will be discarded as noise
  BIT_CLEAR(decoderState, BIT_DECODER_2ND_DERIV);
  BIT_CLEAR(decoderState, BIT_DECODER_IS_SEQUENTIAL);
  BIT_SET(decoderState, BIT_DECODER_HAS_SECONDARY);
  checkSyncToothCount = (configPage4.triggerTeeth) >> 1; //50% of the total teeth.
  toothLastMinusOneToothTime = 0;
  toothCurrentCount = 0;
  toothOneTime = 0;
  toothOneMinusOneTime = 0;
  MAX_STALL_TIME = ((MICROS_PER_DEG_1_RPM/50U) * triggerToothAngle * 2U ); //Minimum 50rpm. (3333uS is the time per degree at 50rpm)
}

void triggerPri_ThirtySixMinus222(void)
{
   curTime = micros();
   curGap = curTime - toothLastToothTime;
   if ( curGap >= triggerFilterTime ) //Pulses should never be less than triggerFilterTime, so if they are it means a false trigger. (A 36-1 wheel at 8000pm will have triggers approx. every 200uS)
   {
     toothCurrentCount++; //Increment the tooth counter
     BIT_SET(decoderState, BIT_DECODER_VALID_TRIGGER); //Flag this pulse as being a valid trigger (ie that it passed filters)

     //Begin the missing tooth detection
     //If the time between the current tooth and the last is greater than 2x the time between the last tooth and the tooth before that, we make the assertion that we must be at the first tooth after a gap
     //toothSystemCount is used to keep track of which missed tooth we're on. It will be set to 1 if that last tooth seen was the middle one in the -2-2 area. At all other times it will be 0
     if(toothSystemCount == 0) { targetGap = ((toothLastToothTime - toothLastMinusOneToothTime)) * 2; } //Multiply by 2 (Checks for a gap 2x greater than the last one)


     if( (toothLastToothTime == 0) || (toothLastMinusOneToothTime == 0) ) { curGap = 0; }

     if ( (curGap > targetGap) )
     {
       {
         if(toothSystemCount == 1)
         {
           //This occurs when we're at the first tooth after the 2 lots of 2x missing tooth.
           if(configPage2.nCylinders == 4 ) { toothCurrentCount = 19; } //H4
           else if(configPage2.nCylinders == 6) { toothCurrentCount = 12; } //H6 - NOT TESTED!
           
           toothSystemCount = 0;
           currentStatus.hasSync = true;
         }
         else
         {
           //We've seen a missing tooth set, but do not yet know whether it is the single one or the double one.
           toothSystemCount = 1;
           toothCurrentCount++;
           toothCurrentCount++; //Accurately reflect the actual tooth count, including the skipped ones
         }
         BIT_CLEAR(decoderState, BIT_DECODER_TOOTH_ANG_CORRECT); //The tooth angle is double at this point
         triggerFilterTime = 0; //This is used to prevent a condition where serious intermittent signals (Eg someone furiously plugging the sensor wire in and out) can leave the filter in an unrecoverable state
       }
     }
     else
     {
       if(toothCurrentCount > 36)
       {
         //Means a complete rotation has occurred.
         toothCurrentCount = 1;
         revolutionOne = !revolutionOne; //Flip sequential revolution tracker
         toothOneMinusOneTime = toothOneTime;
         toothOneTime = curTime;
         currentStatus.startRevolutions++; //Counter

       }
       else if(toothSystemCount == 1)
       {
          //This occurs when a set of missing teeth had been seen, but the next one was NOT missing.
          if(configPage2.nCylinders == 4 )
          { 
            //H4
            toothCurrentCount = 35; 
            currentStatus.hasSync = true;
          } 
          else if(configPage2.nCylinders == 6) 
          { 
            //H6 - THIS NEEDS TESTING
            toothCurrentCount = 34; 
            currentStatus.hasSync = true;
          } 
          
       }

       //Filter can only be recalculated for the regular teeth, not the missing one.
       setFilter(curGap);

       BIT_SET(decoderState, BIT_DECODER_TOOTH_ANG_CORRECT);
       toothSystemCount = 0;
     }

     toothLastMinusOneToothTime = toothLastToothTime;
     toothLastToothTime = curTime;

     //EXPERIMENTAL!
     if(configPage2.perToothIgn == true)
     {
       int16_t crankAngle = ( (toothCurrentCount-1) * triggerToothAngle ) + configPage4.triggerAngle;
       crankAngle = ignitionLimits(crankAngle);
       checkPerToothTiming(crankAngle, toothCurrentCount);
     }

   }
}

void triggerSec_ThirtySixMinus222(void)
{
  //NOT USED - This pattern uses the missing tooth version of this function
}

uint16_t getRPM_ThirtySixMinus222(void)
{
  uint16_t tempRPM = 0;
  if( currentStatus.RPM < currentStatus.crankRPM)
  {
    
    if( (configPage2.nCylinders == 4) && (toothCurrentCount != 19) && (toothCurrentCount != 16) && (toothCurrentCount != 34) && (BIT_CHECK(decoderState, BIT_DECODER_TOOTH_ANG_CORRECT)) )
    {
      tempRPM = crankingGetRPM(36, CRANK_SPEED);
    }
    else if( (configPage2.nCylinders == 6) && (toothCurrentCount != 9) && (toothCurrentCount != 12) && (toothCurrentCount != 33) && (BIT_CHECK(decoderState, BIT_DECODER_TOOTH_ANG_CORRECT)) )
    {
      tempRPM = crankingGetRPM(36, CRANK_SPEED);
    }
    else { tempRPM = currentStatus.RPM; } //Can't do per tooth RPM if we're at and of the missing teeth as it messes the calculation
  }
  else
  {
    tempRPM = stdGetRPM(CRANK_SPEED);
  }
  return tempRPM;
}

int getCrankAngle_ThirtySixMinus222(void)
{
    //NOT USED - This pattern uses the missing tooth version of this function
    return 0;
}

void triggerSetEndTeeth_ThirtySixMinus222(void)
{
  if(configPage2.nCylinders == 4 )
  { 
    if(currentStatus.advance < 10) { ignition1EndTooth = 36; }
    else if(currentStatus.advance < 20) { ignition1EndTooth = 35; }
    else if(currentStatus.advance < 30) { ignition1EndTooth = 34; }
    else { ignition1EndTooth = 31; }

    if(currentStatus.advance < 30) { ignition2EndTooth = 16; }
    else { ignition2EndTooth = 13; }
  }
  else if(configPage2.nCylinders == 6) 
  { 
    //H6
    if(currentStatus.advance < 10) { ignition1EndTooth = 36; }
    else if(currentStatus.advance < 20) { ignition1EndTooth = 35; }
    else if(currentStatus.advance < 30) { ignition1EndTooth = 34; }
    else if(currentStatus.advance < 40) { ignition1EndTooth = 33; }
    else { ignition1EndTooth = 31; }

    if(currentStatus.advance < 20) { ignition2EndTooth = 9; }
    else { ignition2EndTooth = 6; }

    if(currentStatus.advance < 10) { ignition3EndTooth = 23; }
    else if(currentStatus.advance < 20) { ignition3EndTooth = 22; }
    else if(currentStatus.advance < 30) { ignition3EndTooth = 21; }
    else if(currentStatus.advance < 40) { ignition3EndTooth = 20; }
    else { ignition3EndTooth = 19; }
  } 
}
/** @} */

//************************************************************************************************************************

/** 36-2-1 / Mistsubishi 4B11 - A crank based trigger with a nominal 36 teeth, but with 1 single and 1 double missing tooth.
* @defgroup dec_36_2_1 36-2-1 For Mistsubishi 4B11
* @{
*/
void triggerSetup_ThirtySixMinus21(void)
{
  triggerToothAngle = 10; //The number of degrees that passes from tooth to tooth
  triggerActualTeeth = 33; //The number of physical teeth on the wheel. Doing this here saves us a calculation each time in the interrupt. Not Used
  triggerFilterTime = (MICROS_PER_SEC / (MAX_RPM / 60U * 36)); //Trigger filter time is the shortest possible time (in uS) that there can be between crank teeth (ie at max RPM). Any pulses that occur faster than this time will be discarded as noise
  BIT_CLEAR(decoderState, BIT_DECODER_2ND_DERIV);
  BIT_CLEAR(decoderState, BIT_DECODER_IS_SEQUENTIAL);
  BIT_SET(decoderState, BIT_DECODER_HAS_SECONDARY);
  checkSyncToothCount = (configPage4.triggerTeeth) >> 1; //50% of the total teeth.
  toothLastMinusOneToothTime = 0;
  toothCurrentCount = 0;
  toothOneTime = 0;
  toothOneMinusOneTime = 0;
  MAX_STALL_TIME = ((MICROS_PER_DEG_1_RPM/50U) * triggerToothAngle * 2U ); //Minimum 50rpm. (3333uS is the time per degree at 50rpm)
}

void triggerPri_ThirtySixMinus21(void)
{
   curTime = micros();
   curGap = curTime - toothLastToothTime;
   if ( curGap >= triggerFilterTime ) //Pulses should never be less than triggerFilterTime, so if they are it means a false trigger. (A 36-1 wheel at 8000pm will have triggers approx. every 200uS)
   {
     toothCurrentCount++; //Increment the tooth counter
     BIT_SET(decoderState, BIT_DECODER_VALID_TRIGGER); //Flag this pulse as being a valid trigger (ie that it passed filters)

     //Begin the missing tooth detection
     //If the time between the current tooth and the last is greater than 2x the time between the last tooth and the tooth before that, we make the assertion that we must be at the first tooth after a gap
    
     targetGap2 = (3 * (toothLastToothTime - toothLastMinusOneToothTime)) ; //Multiply by 3 (Checks for a gap 3x greater than the last one)
     targetGap = targetGap2 >> 1;  //Multiply by 1.5 (Checks for a gap 1.5x greater than the last one) (Uses bitshift to divide by 2 as in the missing tooth decoder)

     if( (toothLastToothTime == 0) || (toothLastMinusOneToothTime == 0) ) { curGap = 0; }

     if ( (curGap > targetGap) )
     {
      if ( (curGap < targetGap2))
       {
           //we are at the tooth after the single gap
           toothCurrentCount = 20; //it's either 19 or 20, need to clarify engine direction!
           currentStatus.hasSync = true;
        }
        else 
        {
          //we are at the tooth after the double gap
          toothCurrentCount = 1; 
          currentStatus.hasSync = true;
        }
 
         BIT_CLEAR(decoderState, BIT_DECODER_TOOTH_ANG_CORRECT); //The tooth angle is double at this point
         triggerFilterTime = 0; //This is used to prevent a condition where serious intermittent signals (Eg someone furiously plugging the sensor wire in and out) can leave the filter in an unrecoverable state
       }
     }
     else
     {
       if(  (toothCurrentCount > 36) || ( toothCurrentCount==1)  )
       {
         //Means a complete rotation has occurred.
         toothCurrentCount = 1;
         revolutionOne = !revolutionOne; //Flip sequential revolution tracker
         toothOneMinusOneTime = toothOneTime;
         toothOneTime = curTime;
         currentStatus.startRevolutions++; //Counter

       }

       //Filter can only be recalculated for the regular teeth, not the missing one.
       setFilter(curGap);

       BIT_SET(decoderState, BIT_DECODER_TOOTH_ANG_CORRECT);

     }

     toothLastMinusOneToothTime = toothLastToothTime;
     toothLastToothTime = curTime;

     //EXPERIMENTAL!
     if(configPage2.perToothIgn == true)
     {
       int16_t crankAngle = ( (toothCurrentCount-1) * triggerToothAngle ) + configPage4.triggerAngle;
       crankAngle = ignitionLimits(crankAngle);
       checkPerToothTiming(crankAngle, toothCurrentCount);
     }

   
}

void triggerSec_ThirtySixMinus21(void)
{
  //NOT USED - This pattern uses the missing tooth version of this function
}

uint16_t getRPM_ThirtySixMinus21(void)
{
  uint16_t tempRPM = 0;
  if( currentStatus.RPM < currentStatus.crankRPM)
  {
    if( (toothCurrentCount != 20) && (BIT_CHECK(decoderState, BIT_DECODER_TOOTH_ANG_CORRECT)) )
    {
      tempRPM = crankingGetRPM(36, CRANK_SPEED);
    }
    else { tempRPM = currentStatus.RPM; } //Can't do per tooth RPM if we're at tooth #1 as the missing tooth messes the calculation
  }
  else
  {
    tempRPM = stdGetRPM(CRANK_SPEED);
  }
  return tempRPM;
}

int getCrankAngle_ThirtySixMinus21(void)
{
    //NOT USED - This pattern uses the missing tooth version of this function
    return 0;
}

void triggerSetEndTeeth_ThirtySixMinus21(void)
{
  ignition1EndTooth = 10; 
  ignition2EndTooth = 28; // Arbitrarily picked  at 180°.
}
/** @} */

//************************************************************************************************************************

/** DSM 420a, For the DSM Eclipse with 16 teeth total on the crank.
* Tracks the falling side of the signal.
* Sync is determined by watching for a falling edge on the secondary signal and checking if the primary signal is high then.
* https://github.com/noisymime/speeduino/issues/133
* @defgroup dec_dsm_420a DSM 420a, For the DSM Eclipse
* @{
*/
void triggerSetup_420a(void)
{
  triggerFilterTime = (MICROS_PER_SEC / (MAX_RPM / 60U * 360UL)); //Trigger filter time is the shortest possible time (in uS) that there can be between crank teeth (ie at max RPM). Any pulses that occur faster than this time will be discarded as noise
  triggerSecFilterTime = 0;
  secondaryToothCount = 0; //Initially set to 0 prior to calculating the secondary window duration
  BIT_CLEAR(decoderState, BIT_DECODER_2ND_DERIV);
  BIT_SET(decoderState, BIT_DECODER_IS_SEQUENTIAL);
  BIT_SET(decoderState, BIT_DECODER_HAS_SECONDARY);
  toothCurrentCount = 1;
  triggerToothAngle = 20; //Is only correct for the 4 short pulses before each TDC
  BIT_CLEAR(decoderState, BIT_DECODER_TOOTH_ANG_CORRECT);
  toothSystemCount = 0;
  MAX_STALL_TIME = ((MICROS_PER_DEG_1_RPM/50U) * 93U); //Minimum 50rpm. (3333uS is the time per degree at 50rpm)

  toothAngles[0] = 711; //tooth #1, just before #1 TDC
  toothAngles[1] = 111;
  toothAngles[2] = 131;
  toothAngles[3] = 151;
  toothAngles[4] = 171; //Just before #3 TDC
  toothAngles[5] = toothAngles[1] + 180;
  toothAngles[6] = toothAngles[2] + 180;
  toothAngles[7] = toothAngles[3] + 180;
  toothAngles[8] = toothAngles[4] + 180; //Just before #4 TDC
  toothAngles[9]  = toothAngles[1] + 360;
  toothAngles[10] = toothAngles[2] + 360;
  toothAngles[11] = toothAngles[3] + 360;
  toothAngles[12] = toothAngles[4] + 360; //Just before #2 TDC
  toothAngles[13] = toothAngles[1] + 540;
  toothAngles[14] = toothAngles[2] + 540;
  toothAngles[15] = toothAngles[3] + 540;
}

void triggerPri_420a(void)
{
  curTime = micros();
  curGap = curTime - toothLastToothTime;
  if ( curGap >= triggerFilterTime ) //Pulses should never be less than triggerFilterTime, so if they are it means a false trigger. (A 36-1 wheel at 8000pm will have triggers approx. every 200uS)
  {
    toothCurrentCount++; //Increment the tooth counter
    BIT_SET(decoderState, BIT_DECODER_VALID_TRIGGER); //Flag this pulse as being a valid trigger (ie that it passed filters)

    if( (toothLastToothTime == 0) || (toothLastMinusOneToothTime == 0) ) { curGap = 0; }

    if( (toothCurrentCount > 16) && (currentStatus.hasSync == true) )
    {
      //Means a complete rotation has occurred.
      toothCurrentCount = 1;
      toothOneMinusOneTime = toothOneTime;
      toothOneTime = curTime;
      currentStatus.startRevolutions++; //Counter
    }

    //Filter can only be recalculated for the regular teeth, not the missing one.
    //setFilter(curGap);
    triggerFilterTime = 0;

    BIT_CLEAR(decoderState, BIT_DECODER_TOOTH_ANG_CORRECT);

    toothLastMinusOneToothTime = toothLastToothTime;
    toothLastToothTime = curTime;

    //EXPERIMENTAL!
    if(configPage2.perToothIgn == true)
    {
      int16_t crankAngle = ( toothAngles[(toothCurrentCount-1)] ) + configPage4.triggerAngle;
      crankAngle = ignitionLimits(crankAngle);
      checkPerToothTiming(crankAngle, toothCurrentCount);
    }
  }
}

void triggerSec_420a(void)
{
  //Secondary trigger is only on falling edge

  if(READ_PRI_TRIGGER() == true)
  {
    //Secondary signal is falling and primary signal is HIGH
    if( currentStatus.hasSync == false )
    {
      //If we don't have sync, then assume the signal is good
      toothCurrentCount = 13;
      currentStatus.hasSync = true;
    }
    else
    {
      //If we DO have sync, then check that the tooth count matches what we expect
      if(toothCurrentCount != 13)
      {
        currentStatus.syncLossCounter++;
        toothCurrentCount = 13;
      }
    }

  }
  else
  {
    //Secondary signal is falling and primary signal is LOW
    if( currentStatus.hasSync == false )
    {
      //If we don't have sync, then assume the signal is good
      toothCurrentCount = 5;
      currentStatus.hasSync = true;
    }
    else
    {
      //If we DO have sync, then check that the tooth count matches what we expect
      if(toothCurrentCount != 5)
      {
        currentStatus.syncLossCounter++;
        toothCurrentCount = 5;
      }
    }
  }
}

uint16_t getRPM_420a(void)
{
  uint16_t tempRPM = 0;
  if( currentStatus.RPM < currentStatus.crankRPM)
  {
    //Possibly look at doing special handling for cranking in the future, but for now just use the standard method
    tempRPM = stdGetRPM(CAM_SPEED);
  }
  else
  {
    tempRPM = stdGetRPM(CAM_SPEED);
  }
  return tempRPM;
}

int getCrankAngle_420a(void)
{
  //This is the current angle ATDC the engine is at. This is the last known position based on what tooth was last 'seen'. It is only accurate to the resolution of the trigger wheel (Eg 36-1 is 10 degrees)
  unsigned long tempToothLastToothTime;
  int tempToothCurrentCount;
  //Grab some variables that are used in the trigger code and assign them to temp variables.
  noInterrupts();
  tempToothCurrentCount = toothCurrentCount;
  tempToothLastToothTime = toothLastToothTime;
  lastCrankAngleCalc = micros(); //micros() is no longer interrupt safe
  interrupts();

  int crankAngle;
  crankAngle = toothAngles[(tempToothCurrentCount - 1)] + configPage4.triggerAngle; //Perform a lookup of the fixed toothAngles array to find what the angle of the last tooth passed was.

  //Estimate the number of degrees travelled since the last tooth}
  elapsedTime = (lastCrankAngleCalc - tempToothLastToothTime);
  crankAngle += timeToAngleDegPerMicroSec(elapsedTime);

  if (crankAngle >= 720) { crankAngle -= 720; }
  if (crankAngle < 0) { crankAngle += 360; }

  return crankAngle;
}

void triggerSetEndTeeth_420a(void)
{
  if(currentStatus.advance < 9)
  {
    ignition1EndTooth = 1;
    ignition2EndTooth = 5;
    ignition3EndTooth = 9;
    ignition4EndTooth = 13;  
  }
  else
  {
    ignition1EndTooth = 16;
    ignition2EndTooth = 4;
    ignition3EndTooth = 8;
    ignition4EndTooth = 12;  
  }
}
/** @} */

/** Weber-Marelli trigger setup with 2 wheels, 4 teeth 90deg apart on crank and 2 90deg apart on cam.
Uses DualWheel decoders, There can be no missing teeth on the primary wheel.
* @defgroup dec_weber_marelli Weber-Marelli
* @{
*/
void triggerPri_Webber(void)
{
  curTime = micros();
  curGap = curTime - toothLastToothTime;
  if ( curGap >= triggerFilterTime )
  {
    toothCurrentCount++; //Increment the tooth counter
    if (checkSyncToothCount > 0) { checkSyncToothCount++; }
    if ( triggerSecFilterTime <= curGap ) { triggerSecFilterTime = curGap + (curGap>>1); } //150% crank tooth
    BIT_SET(decoderState, BIT_DECODER_VALID_TRIGGER); //Flag this pulse as being a valid trigger (ie that it passed filters)

    toothLastMinusOneToothTime = toothLastToothTime;
    toothLastToothTime = curTime;

    if ( currentStatus.hasSync == true )
    {
      if ( (toothCurrentCount == 1) || (toothCurrentCount > configPage4.triggerTeeth) )
      {
        toothCurrentCount = 1;
        revolutionOne = !revolutionOne; //Flip sequential revolution tracker
        toothOneMinusOneTime = toothOneTime;
        toothOneTime = curTime;
        currentStatus.startRevolutions++; //Counter
      }

      setFilter(curGap); //Recalc the new filter value
    }
    else
    {
      if ( (secondaryToothCount == 1) && (checkSyncToothCount == 4) )
      {
        toothCurrentCount = 2;
        currentStatus.hasSync = true;
        revolutionOne = 0; //Sequential revolution reset
      }
    }

    //NEW IGNITION MODE
    if( (configPage2.perToothIgn == true) && (!BIT_CHECK(currentStatus.engine, BIT_ENGINE_CRANK)) ) 
    {
      int16_t crankAngle = ( (toothCurrentCount-1) * triggerToothAngle ) + configPage4.triggerAngle;
      if( (configPage4.sparkMode == IGN_MODE_SEQUENTIAL) && (revolutionOne == true) && (configPage4.TrigSpeed == CRANK_SPEED) )
      {
        crankAngle += 360;
        checkPerToothTiming(crankAngle, (configPage4.triggerTeeth + toothCurrentCount)); 
      }
      else{ checkPerToothTiming(crankAngle, toothCurrentCount); }
    }
  } //Trigger filter
}

void triggerSec_Webber(void)
{
  curTime2 = micros();
  curGap2 = curTime2 - toothLastSecToothTime;

  if ( curGap2 >= triggerSecFilterTime )
  {
    toothLastSecToothTime = curTime2;

    if ( (secondaryToothCount == 2) && (checkSyncToothCount == 3) )
    {
      if(currentStatus.hasSync == false)
      {
        toothLastToothTime = micros();
        toothLastMinusOneToothTime = micros() - 1500000; //Fixes RPM at 10rpm until a full revolution has taken place
        toothCurrentCount = configPage4.triggerTeeth-1;

        currentStatus.hasSync = true;
      }
      else
      {
        if ( (toothCurrentCount != (configPage4.triggerTeeth-1U)) && (currentStatus.startRevolutions > 2U)) { currentStatus.syncLossCounter++; } //Indicates likely sync loss.
        if (configPage4.useResync == 1) { toothCurrentCount = configPage4.triggerTeeth-1; }
      }
      revolutionOne = 1; //Sequential revolution reset
      triggerSecFilterTime = curGap << 2; //4 crank teeth
      secondaryToothCount = 1; //Next tooth should be first
    } //Running, on first CAM pulse restart crank teeth count, on second the counter should be 3
    else if ( (currentStatus.hasSync == false) && (toothCurrentCount >= 3) && (secondaryToothCount == 0) )
    {
      toothLastToothTime = micros();
      toothLastMinusOneToothTime = micros() - 1500000; //Fixes RPM at 10rpm until a full revolution has taken place
      toothCurrentCount = 1;
      revolutionOne = 1; //Sequential revolution reset

      currentStatus.hasSync = true;
    } //First start, between gaps on CAM pulses have 2 teeth, sync on first CAM pulse if seen 3 teeth or more
    else
    {
      triggerSecFilterTime = curGap + (curGap>>1); //150% crank tooth
      secondaryToothCount++;
      checkSyncToothCount = 1; //Tooth 1 considered as already been seen
    } //First time might fall here, second CAM tooth will
  }
  else
  {
    triggerSecFilterTime = curGap + (curGap>>1); //Noise region, using 150% of crank tooth
    checkSyncToothCount = 1; //Reset tooth counter
  } //Trigger filter
}
/** @} */

/** Ford ST170 - a dedicated decoder for 01-04 Ford Focus ST170/SVT engine.
Standard 36-1 trigger wheel running at crank speed and 8-3 trigger wheel running at cam speed.
* @defgroup dec_ford_st170 Ford ST170 (01-04 Focus)
* @{
*/
void triggerSetup_FordST170(void)
{
  //Set these as we are using the existing missing tooth primary decoder and these will never change.
  configPage4.triggerTeeth = 36;  
  configPage4.triggerMissingTeeth = 1;
  configPage4.TrigSpeed = CRANK_SPEED;

  triggerToothAngle = 360 / configPage4.triggerTeeth; //The number of degrees that passes from tooth to tooth
  triggerActualTeeth = configPage4.triggerTeeth - configPage4.triggerMissingTeeth; //The number of physical teeth on the wheel. Doing this here saves us a calculation each time in the interrupt
  triggerFilterTime = (MICROS_PER_SEC / (MAX_RPM / 60U * configPage4.triggerTeeth)); //Trigger filter time is the shortest possible time (in uS) that there can be between crank teeth (ie at max RPM). Any pulses that occur faster than this time will be discarded as noise
  
  triggerSecFilterTime = MICROS_PER_MIN / MAX_RPM / 8U / 2U; //Cam pattern is 8-3, so 2 nearest teeth are 90 deg crank angle apart. Cam can be advanced by 60 deg, so going from fully retarded to fully advanced closes the gap to 30 deg. Zetec cam pulleys aren't keyed from factory, so I subtracted additional 10 deg to avoid filter to be too aggressive. And there you have it 720/20=36.
  
  BIT_CLEAR(decoderState, BIT_DECODER_2ND_DERIV);
  BIT_SET(decoderState, BIT_DECODER_IS_SEQUENTIAL);
  BIT_SET(decoderState, BIT_DECODER_HAS_SECONDARY);
  checkSyncToothCount = (36) >> 1; //50% of the total teeth.
  toothLastMinusOneToothTime = 0;
  toothCurrentCount = 0;
  secondaryToothCount = 0; 
  toothOneTime = 0;
  toothOneMinusOneTime = 0;
  MAX_STALL_TIME = ((MICROS_PER_DEG_1_RPM/50U) * triggerToothAngle * (1U + 1U)); //Minimum 50rpm. (3333uS is the time per degree at 50rpm)
#ifdef USE_LIBDIVIDE
  divTriggerToothAngle = libdivide::libdivide_s16_gen(triggerToothAngle);
#endif  
}

void triggerSec_FordST170(void)
{
  curTime2 = micros();
  curGap2 = curTime2 - toothLastSecToothTime;

  //Safety check for initial startup
  if( (toothLastSecToothTime == 0) )
  { 
    curGap2 = 0; 
    toothLastSecToothTime = curTime2;
  }

  if ( curGap2 >= triggerSecFilterTime )
  {
      targetGap2 = (3 * (toothLastSecToothTime - toothLastMinusOneSecToothTime)) >> 1; //If the time between the current tooth and the last is greater than 1.5x the time between the last tooth and the tooth before that, we make the assertion that we must be at the first tooth after the gap
      toothLastMinusOneSecToothTime = toothLastSecToothTime;
      if ( (curGap2 >= targetGap2) || (secondaryToothCount == 5) )
      {
        secondaryToothCount = 1;
        revolutionOne = 1; //Sequential revolution reset
        triggerSecFilterTime = 0; //This is used to prevent a condition where serious intermittent signals (Eg someone furiously plugging the sensor wire in and out) can leave the filter in an unrecoverable state
      }
      else
      {
        triggerSecFilterTime = curGap2 >> 2; //Set filter at 25% of the current speed. Filter can only be recalculated for the regular teeth, not the missing one.
        secondaryToothCount++;
      }

    toothLastSecToothTime = curTime2;

    //Record the VVT Angle
    //We use the first tooth after the long gap as our reference, this remains in the same engine
    //cycle even when the VVT is at either end of its full swing.
    if( (configPage6.vvtEnabled > 0) && (revolutionOne == 1) && (secondaryToothCount == 1) )
    {
      int16_t curAngle;
      curAngle = getCrankAngle();
      while(curAngle > 360) { curAngle -= 360; }
      if( configPage6.vvtMode == VVT_MODE_CLOSED_LOOP )
      {
        curAngle = ANGLE_FILTER( (curAngle << 1), configPage4.ANGLEFILTER_VVT, curAngle);
        currentStatus.vvt1Angle = 360 - curAngle - configPage10.vvtCL0DutyAng;
      }
    }
  } //Trigger filter
}

uint16_t getRPM_FordST170(void)
{
  uint16_t tempRPM = 0;
  if( currentStatus.RPM < currentStatus.crankRPM )
  {
    if(toothCurrentCount != 1)
    {
      tempRPM = crankingGetRPM(36, CRANK_SPEED);
    }
    else { tempRPM = currentStatus.RPM; } //Can't do per tooth RPM if we're at tooth #1 as the missing tooth messes the calculation
  }
  else
  {
    tempRPM = stdGetRPM(CRANK_SPEED);
  }
  return tempRPM;
}

int getCrankAngle_FordST170(void)
{
    //This is the current angle ATDC the engine is at. This is the last known position based on what tooth was last 'seen'. It is only accurate to the resolution of the trigger wheel (Eg 36-1 is 10 degrees)
    unsigned long tempToothLastToothTime;
    int tempToothCurrentCount;
    bool tempRevolutionOne;
    //Grab some variables that are used in the trigger code and assign them to temp variables.
    noInterrupts();
    tempToothCurrentCount = toothCurrentCount;
    tempRevolutionOne = revolutionOne;
    tempToothLastToothTime = toothLastToothTime;
    interrupts();

    int crankAngle = ((tempToothCurrentCount - 1) * triggerToothAngle) + configPage4.triggerAngle; //Number of teeth that have passed since tooth 1, multiplied by the angle each tooth represents, plus the angle that tooth 1 is ATDC. This gives accuracy only to the nearest tooth.
    
    //Sequential check (simply sets whether we're on the first or 2nd revolution of the cycle)
    if ( (tempRevolutionOne == true) && (configPage4.TrigSpeed == CRANK_SPEED) ) { crankAngle += 360; }

    lastCrankAngleCalc = micros();
    elapsedTime = (lastCrankAngleCalc - tempToothLastToothTime);
    crankAngle += timeToAngleDegPerMicroSec(elapsedTime);

    if (crankAngle >= 720) { crankAngle -= 720; }
    if (crankAngle < 0) { crankAngle += CRANK_ANGLE_MAX; }

    return crankAngle;
}

static uint16_t __attribute__((noinline)) calcSetEndTeeth_FordST170(int ignitionAngle, uint8_t toothAdder) {
  int16_t tempEndTooth = ignitionAngle - configPage4.triggerAngle;
#ifdef USE_LIBDIVIDE
  tempEndTooth = libdivide::libdivide_s16_do(tempEndTooth, &divTriggerToothAngle);
#else
  tempEndTooth = tempEndTooth / (int16_t)triggerToothAngle;
#endif  
  tempEndTooth = nudge(1, 36U + toothAdder,  tempEndTooth - 1, 36U + toothAdder);
  return clampToActualTeeth((uint16_t)tempEndTooth, toothAdder);
}

void triggerSetEndTeeth_FordST170(void)
{
  byte toothAdder = 0;
   if( (configPage4.sparkMode == IGN_MODE_SEQUENTIAL) && (configPage4.TrigSpeed == CRANK_SPEED) ) { toothAdder = 36; }

  ignition1EndTooth = calcSetEndTeeth_FordST170(ignition1EndAngle, toothAdder);
  ignition2EndTooth = calcSetEndTeeth_FordST170(ignition2EndAngle, toothAdder);
  ignition3EndTooth = calcSetEndTeeth_FordST170(ignition3EndAngle, toothAdder);
  ignition4EndTooth = calcSetEndTeeth_FordST170(ignition4EndAngle, toothAdder);

  // Removed ign channels >4 as an ST170 engine is a 4 cylinder
}
/** @} */


void triggerSetup_DRZ400(void)
{
  triggerToothAngle = 360 / configPage4.triggerTeeth; //The number of degrees that passes from tooth to tooth
  if(configPage4.TrigSpeed == 1) { triggerToothAngle = 720 / configPage4.triggerTeeth; } //Account for cam speed
  toothCurrentCount = 255; //Default value
  triggerFilterTime = (MICROS_PER_SEC / (MAX_RPM / 60U * configPage4.triggerTeeth)); //Trigger filter time is the shortest possible time (in uS) that there can be between crank teeth (ie at max RPM). Any pulses that occur faster than this time will be discarded as noise
  triggerSecFilterTime = (MICROS_PER_SEC / (MAX_RPM / 60U * 2U)); //Same as above, but fixed at 2 teeth on the secondary input
  BIT_CLEAR(decoderState, BIT_DECODER_2ND_DERIV);
  BIT_SET(decoderState, BIT_DECODER_IS_SEQUENTIAL);
  BIT_SET(decoderState, BIT_DECODER_TOOTH_ANG_CORRECT); //This is always true for this pattern
  BIT_SET(decoderState, BIT_DECODER_HAS_SECONDARY);
  MAX_STALL_TIME = ((MICROS_PER_DEG_1_RPM/50U) * triggerToothAngle); //Minimum 50rpm. (3333uS is the time per degree at 50rpm)
}

void triggerSec_DRZ400(void)
{
  curTime2 = micros();
  curGap2 = curTime2 - toothLastSecToothTime;
  if ( curGap2 >= triggerSecFilterTime )
  {
    toothLastSecToothTime = curTime2;

    if(currentStatus.hasSync == false)
    {
      toothLastToothTime = micros();
      toothLastMinusOneToothTime = micros() - ((MICROS_PER_MIN/10U) / configPage4.triggerTeeth); //Fixes RPM at 10rpm until a full revolution has taken place
      toothCurrentCount = configPage4.triggerTeeth;
      currentStatus.syncLossCounter++;
      currentStatus.hasSync = true;
    }
    else 
    {
      // have rotation, set tooth to six so next tooth is 1 & duel wheel rotation code kicks in 
      toothCurrentCount = 6;
    }
  }

  triggerSecFilterTime = (toothOneTime - toothOneMinusOneTime) >> 1; //Set filter at 50% of the current crank speed. 
}

/** Chrysler NGC - a dedicated decoder for vehicles with 4, 6 and 8 cylinder NGC pattern.
4-cyl: 36+2-2 crank wheel and 7 tooth cam
6-cyl: 36-2+2 crank wheel and 12 tooth cam in 6 groups
8-cyl: 36-2+2 crank wheel and 15 tooth cam in 8 groups
The crank decoder uses the polarity of the missing teeth to determine position
The 4-cyl cam decoder uses the polarity of the missing teeth to determine position
The 6 and 8-cyl cam decoder uses the amount of teeth in the two previous groups of teeth to determine position
* @defgroup dec Chrysler NGC - 4, 6 and 8-cylinder
* @{
*/

void triggerSetup_NGC(void)
{
  BIT_CLEAR(decoderState, BIT_DECODER_2ND_DERIV);
  BIT_SET(decoderState, BIT_DECODER_IS_SEQUENTIAL);
  BIT_SET(decoderState, BIT_DECODER_HAS_SECONDARY);

  //Primary trigger
  configPage4.triggerTeeth = 36; //The number of teeth on the wheel incl missing teeth.
  triggerToothAngle = 10; //The number of degrees that passes from tooth to tooth
  triggerFilterTime = MICROS_PER_SEC / (MAX_RPM/60U) / (360U/triggerToothAngle); //Trigger filter time is the shortest possible time (in uS) that there can be between crank teeth (ie at max RPM). Any pulses that occur faster than this time will be discarded as noise
  toothCurrentCount = 0;
  toothOneTime = 0;
  toothOneMinusOneTime = 0;
  toothLastMinusOneToothTime = 0;
  toothLastToothRisingTime = 0;
  MAX_STALL_TIME = ((MICROS_PER_DEG_1_RPM/50U) * triggerToothAngle * 2U ); //Minimum 50rpm. (3333uS is the time per degree at 50rpm)

  //Secondary trigger
  if (configPage2.nCylinders == 4) {
    triggerSecFilterTime = (MICROS_PER_SEC / (MAX_RPM/60U) / (360U/36U) * 2U); //Two nearest edges are 36 degrees apart. Multiply by 2 for half cam speed.
  } else {
    triggerSecFilterTime = (MICROS_PER_SEC / (MAX_RPM/60U) / (360U/21U) * 2U); //Two nearest edges are 21 degrees apart. Multiply by 2 for half cam speed.
  }
  secondaryToothCount = 0;
  toothSystemCount = 0;
  toothLastSecToothRisingTime = 0;
  toothLastSecToothTime = 0;
  toothLastMinusOneSecToothTime = 0;

  //toothAngles is reused to store the cam pattern, only used for 6 and 8 cylinder pattern
  if (configPage2.nCylinders == 6) {
    toothAngles[0] = 1; // Pos 0 is required to be the same as group 6 for easier math
    toothAngles[1] = 3; // Group 1 ...
    toothAngles[2] = 1;
    toothAngles[3] = 2;
    toothAngles[4] = 3;
    toothAngles[5] = 2;
    toothAngles[6] = 1;
    toothAngles[7] = 3; // Pos 7 is required to be the same as group 1 for easier math
  }
  else if (configPage2.nCylinders == 8) {
    toothAngles[0] = 3; // Pos 0 is required to be the same as group 8 for easier math
    toothAngles[1] = 1; // Group 1 ...
    toothAngles[2] = 1;
    toothAngles[3] = 2;
    toothAngles[4] = 3;
    toothAngles[5] = 2;
    toothAngles[6] = 2;
    toothAngles[7] = 1;
    toothAngles[8] = 3;
    toothAngles[9] = 1; // Pos 9 is required to be the same as group 1 for easier math
  }
#ifdef USE_LIBDIVIDE
  divTriggerToothAngle = libdivide::libdivide_s16_gen(triggerToothAngle);
#endif  
}

void triggerPri_NGC(void) 
{
  curTime = micros();
  // We need to know the polarity of the missing tooth to determine position
  if (READ_PRI_TRIGGER() == HIGH) {
    toothLastToothRisingTime = curTime;
    return;
  }

  curGap = curTime - toothLastToothTime;
  if ( curGap >= triggerFilterTime ) //Pulses should never be less than triggerFilterTime, so if they are it means a false trigger.
  {
    toothCurrentCount++;
    BIT_SET(decoderState, BIT_DECODER_VALID_TRIGGER); //Flag this pulse as being a valid trigger (ie that it passed filters)
    bool isMissingTooth = false;

    if ( toothLastToothTime > 0 && toothLastMinusOneToothTime > 0 ) { //Make sure we haven't enough tooth information to calculate missing tooth length

      //Only check for missing tooth if we expect this one to be it or if we haven't found one yet
      if (toothCurrentCount == 17 || toothCurrentCount == 35 || ( currentStatus.hasSync == false && BIT_CHECK(currentStatus.status3, BIT_STATUS3_HALFSYNC) == false) ) {
        //If the time between the current tooth and the last is greater than 2x the time between the last tooth and the tooth before that, we make the assertion that we must be at the first tooth after the gap
        if (curGap > ( (toothLastToothTime - toothLastMinusOneToothTime) * 2 ) )
        {
          isMissingTooth = true; //Missing tooth detected
          triggerFilterTime = 0; //This is used to prevent a condition where serious intermittent signals (Eg someone furiously plugging the sensor wire in and out) can leave the filter in an unrecoverable state
          BIT_CLEAR(decoderState, BIT_DECODER_TOOTH_ANG_CORRECT); //The tooth angle is double at this point
          
          // Figure out the polarity of the missing tooth by comparing how far ago the last tooth rose
          if ((toothLastToothRisingTime - toothLastToothTime) < (curTime - toothLastToothRisingTime)) {
            //Just passed the HIGH missing tooth
            toothCurrentCount = 1;

            toothOneMinusOneTime = toothOneTime;
            toothOneTime = curTime;

            if (currentStatus.hasSync == true) { currentStatus.startRevolutions++; }
            else { currentStatus.startRevolutions = 0; }
          }
          else {
            //Just passed the first tooth after the LOW missing tooth
            toothCurrentCount = 19;
          }

          //If Sequential fuel or ignition is in use, further checks are needed before determining sync
          if( (configPage4.sparkMode == IGN_MODE_SEQUENTIAL) || (configPage2.injLayout == INJ_SEQUENTIAL) )
          {
            // Verify the tooth counters are valid and use this to determine current revolution
            if (
              ( configPage2.nCylinders == 4 && ( (toothCurrentCount == 1 && (secondaryToothCount == 1 || secondaryToothCount == 2) ) || (toothCurrentCount == 19 && secondaryToothCount == 4) ) ) ||
              ( configPage2.nCylinders == 6 && ( (toothCurrentCount == 1 && (toothSystemCount == 1    || toothSystemCount == 2) )    || (toothCurrentCount == 19 && (toothSystemCount == 2 || toothSystemCount == 3) ) ) ) ||
              ( configPage2.nCylinders == 8 && ( (toothCurrentCount == 1 && (toothSystemCount == 1    || toothSystemCount == 2) )    || (toothCurrentCount == 19 && (toothSystemCount == 3 || toothSystemCount == 4) ) ) ) )
            {
              revolutionOne = false;
              currentStatus.hasSync = true;
              BIT_CLEAR(currentStatus.status3, BIT_STATUS3_HALFSYNC); //the engine is fully synced so clear the Half Sync bit
            }
            else if (
              ( configPage2.nCylinders == 4 && ( (toothCurrentCount == 1 && secondaryToothCount == 5)                          || (toothCurrentCount == 19 && secondaryToothCount == 7) ) ) ||
              ( configPage2.nCylinders == 6 && ( (toothCurrentCount == 1 && (toothSystemCount == 4 || toothSystemCount == 5) ) || (toothCurrentCount == 19 && (toothSystemCount == 5 || toothSystemCount == 6) ) ) ) ||
              ( configPage2.nCylinders == 8 && ( (toothCurrentCount == 1 && (toothSystemCount == 5 || toothSystemCount == 6) ) || (toothCurrentCount == 19 && (toothSystemCount == 7 || toothSystemCount == 8) ) ) ) )
            {
              revolutionOne = true;
              currentStatus.hasSync = true;
              BIT_CLEAR(currentStatus.status3, BIT_STATUS3_HALFSYNC); //the engine is fully synced so clear the Half Sync bit
            }
            // If tooth counters are not valid, set half sync bit
            else {
              if (currentStatus.hasSync == true) { currentStatus.syncLossCounter++; }
              currentStatus.hasSync = false;
              BIT_SET(currentStatus.status3, BIT_STATUS3_HALFSYNC); //If there is primary trigger but no secondary we only have half sync.
            }
          }
          else { currentStatus.hasSync = true;  BIT_CLEAR(currentStatus.status3, BIT_STATUS3_HALFSYNC); } //If nothing is using sequential, we have sync and also clear half sync bit

        }
        else {
          // If we have found a missing tooth and don't get the next one at the correct tooth we end up here -> Resync
          if (currentStatus.hasSync == true) { currentStatus.syncLossCounter++; }
          currentStatus.hasSync = false;
          BIT_CLEAR(currentStatus.status3, BIT_STATUS3_HALFSYNC);
        }
      }

      if(isMissingTooth == false)
      {
        //Regular (non-missing) tooth
        setFilter(curGap);
        BIT_SET(decoderState, BIT_DECODER_TOOTH_ANG_CORRECT);
      }
    }

    if (isMissingTooth == true) { // If we have a missing tooth, copy the gap from the previous tooth as that is the correct normal tooth length
      toothLastMinusOneToothTime = curTime - (toothLastToothTime - toothLastMinusOneToothTime);
    }
    else {
      toothLastMinusOneToothTime = toothLastToothTime;
    }
    toothLastToothTime = curTime;

    //NEW IGNITION MODE
    if( (configPage2.perToothIgn == true) && (BIT_CHECK(currentStatus.engine, BIT_ENGINE_CRANK) == false) ) 
    {
      int16_t crankAngle = ( (toothCurrentCount-1) * triggerToothAngle ) + configPage4.triggerAngle;
      crankAngle = ignitionLimits(crankAngle);
      if( (configPage4.sparkMode == IGN_MODE_SEQUENTIAL) && (revolutionOne == true) && (configPage4.TrigSpeed == CRANK_SPEED) )
      {
        crankAngle += 360;
        checkPerToothTiming(crankAngle, (configPage4.triggerTeeth + toothCurrentCount)); 
      }
    else{ checkPerToothTiming(crankAngle, toothCurrentCount); }
    }
  }
}

void triggerSec_NGC4(void)
{
  //Only check the cam wheel for sequential operation
  if( configPage4.sparkMode != IGN_MODE_SEQUENTIAL && configPage2.injLayout != INJ_SEQUENTIAL ) {
    return;
  }

  curTime2 = micros();

  // We need to know the polarity of the missing tooth to determine position
  if (READ_SEC_TRIGGER() == HIGH) {
    toothLastSecToothRisingTime = curTime2;
    return;
  }

  curGap2 = curTime2 - toothLastSecToothTime;

  if ( curGap2 > triggerSecFilterTime )
  {
    if ( toothLastSecToothTime > 0 && toothLastMinusOneSecToothTime > 0 ) //Make sure we have enough tooth information to calculate tooth lengths
    {
      if (secondaryToothCount > 0) { secondaryToothCount++; }

      if (curGap2 >= ((3 * (toothLastSecToothTime - toothLastMinusOneSecToothTime)) >> 1)) // Check if we have a bigger gap, that is a long tooth
      {
        // Check long tooth polarity
        if ((toothLastSecToothRisingTime - toothLastSecToothTime) < (curTime2 - toothLastSecToothRisingTime)) {
          //Just passed the HIGH missing tooth
          if ( secondaryToothCount == 0 || secondaryToothCount == 8 ) { secondaryToothCount = 1; } // synced
          else if (secondaryToothCount > 0) { secondaryToothCount = 0; } //Any other number of teeth seen means we missed something or something extra was seen so attempt resync.
        }
        else {
          //Just passed the first tooth after the LOW missing tooth
          if ( secondaryToothCount == 0 || secondaryToothCount == 5 ) { secondaryToothCount = 5; }
          else if (secondaryToothCount > 0) { secondaryToothCount = 0; }
        }

        triggerSecFilterTime = 0; //This is used to prevent a condition where serious intermittent signals (Eg someone furiously plugging the sensor wire in and out) can leave the filter in an unrecoverable state
      }
      else if (secondaryToothCount > 0) {
        triggerSecFilterTime = curGap2 >> 2; //Set filter at 25% of the current speed. Filter can only be recalc'd for the regular teeth, not the missing one.
      }

    }
    
    toothLastMinusOneSecToothTime = toothLastSecToothTime;
    toothLastSecToothTime = curTime2;
  }
}

#define secondaryToothLastCount checkSyncToothCount

void triggerSec_NGC68(void)
{
  //Only check the cam wheel for sequential operation
  if( configPage4.sparkMode != IGN_MODE_SEQUENTIAL && configPage2.injLayout != INJ_SEQUENTIAL ) {
    return;
  }

  curTime2 = micros();

  curGap2 = curTime2 - toothLastSecToothTime;

  if ( curGap2 > triggerSecFilterTime )
  {
    if ( toothLastSecToothTime > 0 && toothLastToothTime > 0 && toothLastMinusOneToothTime > 0 ) //Make sure we have enough tooth information to calculate tooth lengths
    {
      /* Cam wheel can have a single tooth in a group which can screw up the "targetgap" calculations
         Instead use primary wheel tooth gap as comparison as those values are always correct. 2.1 primary teeth are the same duration as one secondary tooth. */
      if (curGap2 >= (3 * (toothLastToothTime - toothLastMinusOneToothTime) ) ) // Check if we have a bigger gap, that is missing teeth
      {
        //toothSystemCount > 0 means we have cam sync and identifies which group we have synced with
        //toothAngles is reused to store the cam pattern
        if (secondaryToothCount > 0 && secondaryToothLastCount > 0) { // Only check for cam sync if we have actually detected two groups and can get cam sync
          if (toothSystemCount > 0 && secondaryToothCount == (unsigned int)toothAngles[toothSystemCount+1]) { // Do a quick check if we already have cam sync
            toothSystemCount++;
            if (toothSystemCount > configPage2.nCylinders) { toothSystemCount = 1; }
          }
          else { // Check for a pair of matching groups which tells us which group we are at, this should only happen when we don't have cam sync
            toothSystemCount = 0; // We either haven't got cam sync yet or we lost cam sync
            for (byte group = 1; group <= configPage2.nCylinders; group++) {
              if (secondaryToothCount == (unsigned int)toothAngles[group] && secondaryToothLastCount == (byte)toothAngles[group-1] ) { // Find a matching pattern/position
                toothSystemCount = group;
                break;
              }
            }
          }
        }

        secondaryToothLastCount = secondaryToothCount;
        //This is the first tooth in this group
        secondaryToothCount = 1;

        triggerSecFilterTime = 0; //This is used to prevent a condition where serious intermittent signals (Eg someone furiously plugging the sensor wire in and out) can leave the filter in an unrecoverable state

      }
      else if (secondaryToothCount > 0) {
        //Normal tooth
        secondaryToothCount++;
        triggerSecFilterTime = curGap2 >> 2; //Set filter at 25% of the current speed
      }
    }

    toothLastSecToothTime = curTime2;
  }
}

uint16_t getRPM_NGC(void)
{
  uint16_t tempRPM = 0;
  if( currentStatus.RPM < currentStatus.crankRPM)
  {
    if (BIT_CHECK(decoderState, BIT_DECODER_TOOTH_ANG_CORRECT)) { tempRPM = crankingGetRPM(36, CRANK_SPEED); }
    else { tempRPM = currentStatus.RPM; } //Can't do per tooth RPM if we're at any of the missing teeth as it messes the calculation
  }
  else
  {
    tempRPM = stdGetRPM(CRANK_SPEED);
  }
  return tempRPM;
}

static inline uint16_t calcSetEndTeeth_NGC_SkipMissing(uint16_t toothNum) {
  if(toothNum == 17U || toothNum == 18U) { return 16U; } // These are missing teeth, so set the next one before instead
  if(toothNum == 35U || toothNum == 36U) { return 34U; } // These are missing teeth, so set the next one before instead
  if(toothNum == 53U || toothNum == 54U) { return 52U; } // These are missing teeth, so set the next one before instead
  if(toothNum > 70U) { return 70U; } // These are missing teeth, so set the next one before instead
  return toothNum;

}

static uint16_t __attribute__((noinline)) calcSetEndTeeth_NGC(int ignitionAngle, uint8_t toothAdder) {
  int16_t tempEndTooth = ignitionAngle - configPage4.triggerAngle;
#ifdef USE_LIBDIVIDE
  tempEndTooth = libdivide::libdivide_s16_do(tempEndTooth, &divTriggerToothAngle);
#else
  tempEndTooth = tempEndTooth / (int16_t)triggerToothAngle;
#endif  
  return calcSetEndTeeth_NGC_SkipMissing(clampToToothCount(tempEndTooth - 1, toothAdder));
}

void triggerSetEndTeeth_NGC(void)
{
  byte toothAdder = 0;
  if( (configPage4.sparkMode == IGN_MODE_SEQUENTIAL) && (configPage4.TrigSpeed == CRANK_SPEED) ) { toothAdder = configPage4.triggerTeeth; }
  
  ignition1EndTooth = calcSetEndTeeth_NGC(ignition1EndAngle, toothAdder);
  ignition2EndTooth = calcSetEndTeeth_NGC(ignition2EndAngle, toothAdder);
  ignition3EndTooth = calcSetEndTeeth_NGC(ignition3EndAngle, toothAdder);
  ignition4EndTooth = calcSetEndTeeth_NGC(ignition4EndAngle, toothAdder);
  #if IGN_CHANNELS >= 6
  ignition5EndTooth = calcSetEndTeeth_NGC(ignition5EndAngle, toothAdder);
  ignition6EndTooth = calcSetEndTeeth_NGC(ignition6EndAngle, toothAdder);
  #endif

  #if IGN_CHANNELS >= 8
  ignition7EndTooth = calcSetEndTeeth_NGC(ignition7EndAngle, toothAdder);
  ignition8EndTooth = calcSetEndTeeth_NGC(ignition8EndAngle, toothAdder);
  #endif
}

/** Yamaha Vmax 1990+ with 6 uneven teeth, triggering on the wide lobe.
Within the decoder code, the sync tooth is referred to as tooth #1. Derived from Harley and made to work on the Yamah Vmax.
Trigger is based on 'CHANGE' so we get a signal on the up and downward edges of the lobe. This is required to identify the wide lobe.
* @defgroup dec_vmax Yamaha Vmax
* @{
*/
void triggerSetup_Vmax(void)
{
  triggerToothAngle = 0; // The number of degrees that passes from tooth to tooth, ev. 0. It alternates uneven
  BIT_CLEAR(decoderState, BIT_DECODER_2ND_DERIV);
  BIT_CLEAR(decoderState, BIT_DECODER_IS_SEQUENTIAL);
  BIT_CLEAR(decoderState, BIT_DECODER_HAS_SECONDARY);
  MAX_STALL_TIME = ((MICROS_PER_DEG_1_RPM/50U) * 60U); //Minimum 50rpm. (3333uS is the time per degree at 50rpm)
  if(currentStatus.initialisationComplete == false) { toothLastToothTime = micros(); } //Set a startup value here to avoid filter errors when starting. This MUST have the initi check to prevent the fuel pump just staying on all the time
  triggerFilterTime = 1500;
  BIT_SET(decoderState, BIT_DECODER_VALID_TRIGGER); // We must start with a valid trigger or we cannot start measuring the lobe width. We only have a false trigger on the lobe up event when it doesn't pass the filter. Then, the lobe width will also not be beasured.
  toothAngles[1] = 0;      //tooth #1, these are the absolute tooth positions
  toothAngles[2] = 40;     //tooth #2
  toothAngles[3] = 110;    //tooth #3
  toothAngles[4] = 180;    //tooth #4
  toothAngles[5] = 220;    //tooth #5
  toothAngles[6] = 290;    //tooth #6
}

//curGap = microseconds between primary triggers
//curGap2 = microseconds between secondary triggers
//toothCurrentCount = the current number for the end of a lobe
//secondaryToothCount = the current number of the beginning of a lobe
//We measure the width of a lobe so on the end of a lobe, but want to trigger on the beginning. Variable toothCurrentCount tracks the downward events, and secondaryToothCount updates on the upward events. Ideally, it should be the other way round but the engine stall routine resets secondaryToothCount, so it would not sync again after an engine stall.

void triggerPri_Vmax(void)
{
  curTime = micros();
  if(READ_PRI_TRIGGER() == primaryTriggerEdge){// Forwarded from the config page to setup the primary trigger edge (rising or falling). Inverting VR-conditioners require FALLING, non-inverting VR-conditioners require RISING in the Trigger edge setup.
    curGap2 = curTime;
    curGap = curTime - toothLastToothTime;
    if ( (curGap >= triggerFilterTime) ){
      BIT_SET(decoderState, BIT_DECODER_VALID_TRIGGER); //Flag this pulse as being a valid trigger (ie that it passed filters)
      if (toothCurrentCount > 0) // We have sync based on the tooth width.
      {
          BIT_SET(decoderState, BIT_DECODER_VALID_TRIGGER); //Flag this pulse as being a valid trigger (ie that it passed filters)
          if (toothCurrentCount==1)
          {
            secondaryToothCount = 1;
            triggerToothAngle = 70;// Has to be equal to Angle Routine, and describe the delta between two teeth.
            toothOneMinusOneTime = toothOneTime;
            toothOneTime = curTime;
            currentStatus.hasSync = true;
            //setFilter((curGap/1.75));//Angle to this tooth is 70, next is in 40, compensating.
            setFilter( ((curGap*4)/7) );//Angle to this tooth is 70, next is in 40, compensating.
            currentStatus.startRevolutions++; //Counter
          }
          else if (toothCurrentCount==2)
          {
            secondaryToothCount = 2;
            triggerToothAngle = 40;
            //setFilter((curGap*1.75));//Angle to this tooth is 40, next is in 70, compensating.
            setFilter( ((curGap*7)/4) );//Angle to this tooth is 40, next is in 70, compensating.
          }
          else if (toothCurrentCount==3)
          {
            secondaryToothCount = 3;
            triggerToothAngle = 70;
            setFilter(curGap);//Angle to this tooth is 70, next is in 70. No need to compensate.
          }
          else if (toothCurrentCount==4)
          {
            secondaryToothCount = 4;
            triggerToothAngle = 70;
            //setFilter((curGap/1.75));//Angle to this tooth is 70, next is in 40, compensating.
            setFilter( ((curGap*4)/7) );//Angle to this tooth is 70, next is in 40, compensating.
          }
          else if (toothCurrentCount==5)
          {
            secondaryToothCount = 5;
            triggerToothAngle = 40;
            //setFilter((curGap*1.75));//Angle to this tooth is 40, next is in 70, compensating.
            setFilter( ((curGap*7)/4) );//Angle to this tooth is 40, next is in 70, compensating.
          }
          else if (toothCurrentCount==6)
          {
            secondaryToothCount = 6;
            triggerToothAngle = 70;
            setFilter(curGap);//Angle to this tooth is 70, next is in 70. No need to compensate.
          }
          toothLastMinusOneToothTime = toothLastToothTime;
          toothLastToothTime = curTime;
          if (triggerFilterTime > 50000){//The first pulse seen 
            triggerFilterTime = 0;
          }
      }
      else{
        triggerFilterTime = 0;
        return;//Zero, no sync yet.
      }
    }
    else{
      BIT_CLEAR(decoderState, BIT_DECODER_VALID_TRIGGER); //Flag this pulse as being an invalid trigger
    }
  }
  else if( BIT_CHECK(decoderState, BIT_DECODER_VALID_TRIGGER) ) // Inverted due to vr conditioner. So this is the falling lobe. We only process if there was a valid trigger.
  {
    unsigned long curGapLocal = curTime - curGap2;
    if (curGapLocal > (lastGap * 2)){// Small lobe is 5 degrees, big lobe is 45 degrees. So this should be the wide lobe.
        if (toothCurrentCount == 0 || toothCurrentCount == 6){//Wide should be seen with toothCurrentCount = 0, when there is no sync yet, or toothCurrentCount = 6 when we have done a full revolution. 
          currentStatus.hasSync = true;
        }
        else{//Wide lobe seen where it shouldn't, adding a sync error.
          currentStatus.syncLossCounter++;
        }
        toothCurrentCount = 1;
    }
    else if(toothCurrentCount == 6){//The 6th lobe should be wide, adding a sync error.
        toothCurrentCount = 1;
        currentStatus.syncLossCounter++;
    }
    else{// Small lobe, just add 1 to the toothCurrentCount.
      toothCurrentCount++;
    }
    lastGap = curGapLocal;
    return;
  }
  else if( BIT_CHECK(decoderState, BIT_DECODER_VALID_TRIGGER) == false)
  {
    BIT_SET(decoderState, BIT_DECODER_VALID_TRIGGER); //We reset this every time to ensure we only filter when needed.
  }
}


void triggerSec_Vmax(void)
// Needs to be enabled in main()
{
  return;// No need for now. The only thing it could help to sync more quikly or confirm position.
} // End Sec Trigger


uint16_t getRPM_Vmax(void)
{
  uint16_t tempRPM = 0;
  if (currentStatus.hasSync == true)
  {
    if ( currentStatus.RPM < (unsigned int)(configPage4.crankRPM * 100) )
    {
      int tempToothAngle;
      unsigned long toothTime;
      if ( (toothLastToothTime == 0) || (toothLastMinusOneToothTime == 0) ) { tempRPM = 0; }
      else
      {
        noInterrupts();
        tempToothAngle = triggerToothAngle;
        SetRevolutionTime(toothOneTime - toothOneMinusOneTime); //The time in uS that one revolution would take at current speed (The time tooth 1 was last seen, minus the time it was seen prior to that)
        toothTime = (toothLastToothTime - toothLastMinusOneToothTime); 
        interrupts();
        toothTime = toothTime * 36;
        tempRPM = ((unsigned long)tempToothAngle * (MICROS_PER_MIN/10U)) / toothTime;
      }
    }
    else {
      tempRPM = stdGetRPM(CRANK_SPEED);
    }
  }
  return tempRPM;
}


int getCrankAngle_Vmax(void)
{
  //This is the current angle ATDC the engine is at. This is the last known position based on what tooth was last 'seen'. It is only accurate to the resolution of the trigger wheel (Eg 36-1 is 10 degrees)
  unsigned long tempToothLastToothTime;
  int tempsecondaryToothCount;
  //Grab some variables that are used in the trigger code and assign them to temp variables.
  noInterrupts();
  tempsecondaryToothCount = secondaryToothCount;
  tempToothLastToothTime = toothLastToothTime;
  lastCrankAngleCalc = micros(); //micros() is no longer interrupt safe
  interrupts();

  //Check if the last tooth seen was the reference tooth (Number 3). All others can be calculated, but tooth 3 has a unique angle
  int crankAngle;
  crankAngle=toothAngles[tempsecondaryToothCount] + configPage4.triggerAngle;
  
  //Estimate the number of degrees travelled since the last tooth}
  elapsedTime = (lastCrankAngleCalc - tempToothLastToothTime);
  crankAngle += timeToAngleDegPerMicroSec(elapsedTime);

  if (crankAngle >= 720) { crankAngle -= 720; }
  if (crankAngle < 0) { crankAngle += 360; }

  return crankAngle;
}

void triggerSetEndTeeth_Vmax(void)
{
}

/** @} */

/** Renix 44-2-2  and 66-2-2-2 decoder.  
* Renix trigger wheel doesn't decode into 360 degrees nicely (360/44 = 8.18 degrees or 360/66 = 5.454545). Speeduino can't handle any teeth that have a decimal point.
* Solution is to count teeth, every 11 teeth = a proper angle. For 66 tooth decoder its 60 degrees per 11 teeth, for 44 tooth decoder its 90 degrees per 11 teeth.
* This means the system sees 4 teeth on the 44 tooth wheel and 6 teeth on the 66 tooth wheel.
* Double missing tooth in the pattern is actually a large tooth and a large gap. If the trigger is set to rising you'll see the start of the large tooth
* then the gap. If its not set to rising the code won't work due to seeing two gaps
*
*
* @defgroup dec_renix Renix decoder 
* @{
*/
void triggerSetup_Renix(void)
{
  if( configPage2.nCylinders == 4)
  {
    triggerToothAngle = 90; //The number of degrees that passes from tooth to tooth (primary) this changes between 41 and 49 degrees
    configPage4.triggerTeeth = 4; // wheel has 44 teeth but we use these to work out which tooth angle to use, therefore speeduino thinks we only have 8 teeth.
    configPage4.triggerMissingTeeth = 0;
    triggerActualTeeth = 4; //The number of teeth we're pretending physically existing on the wheel.
    triggerFilterTime = (MICROS_PER_SEC / (MAX_RPM / 60U * 44U)); //Trigger filter time is the shortest possible time (in uS) that there can be between crank teeth (ie at max RPM). Any pulses that occur faster than this time will be discarded as noise
  }
  else if (configPage2.nCylinders == 6)
  {
    triggerToothAngle = 60;
    configPage4.triggerTeeth = 6; // wheel has 44 teeth but we use these to work out which tooth angle to use, therefore speeduino thinks we only have 6 teeth.
    configPage4.triggerMissingTeeth = 0;
    triggerActualTeeth = 6; //The number of teeth we're pretending physically existing on the wheel.
    triggerFilterTime = (MICROS_PER_SEC / (MAX_RPM / 60U * 66U)); //Trigger filter time is the shortest possible time (in uS) that there can be between crank teeth (ie at max RPM). Any pulses that occur faster than this time will be discarded as noise
  }

  MAX_STALL_TIME = ((MICROS_PER_DEG_1_RPM/50U) * triggerToothAngle); //Minimum 50rpm. (3333uS is the time per degree at 50rpm). Largest gap between teeth is 90 or 60 degrees depending on decoder.
  BIT_CLEAR(decoderState, BIT_DECODER_HAS_SECONDARY);

  toothSystemCount = 1;
  toothCurrentCount = 1;
  toothLastToothTime = 0;
#ifdef USE_LIBDIVIDE
  divTriggerToothAngle = libdivide::libdivide_s16_gen(triggerToothAngle);
#endif  
}


// variables used to help calculate gap on the physical 44 or 66 teeth we're pretending don't exist in most of the speeduino code
// reusing existing variables to save storage space as these aren't used in the code for their original purpose.
#define renixSystemLastToothTime         toothLastToothRisingTime
#define renixSystemLastMinusOneToothTime toothLastSecToothRisingTime

void triggerPri_Renix(void)
{
  curTime = micros();
  curGap = curTime - renixSystemLastToothTime;

  if ( curGap >= triggerFilterTime )   
  {
       
    toothSystemCount++;

    if( renixSystemLastToothTime != 0 && renixSystemLastMinusOneToothTime != 0)
    { targetGap = (2 * (renixSystemLastToothTime - renixSystemLastMinusOneToothTime));}  // in real world the physical 2 tooth gap is bigger than 2 teeth - more like 2.5
    else 
    { targetGap = 100000000L; } // random large number to stop system thinking we have a gap for the first few teeth on start up

    if( curGap >= targetGap )
    { 
      /* add two teeth to account for the gap we've just seen */      
      toothSystemCount++;
      toothSystemCount++;
   
      if( toothSystemCount != 12) // if not 12 (the first tooth after the gap) then we've lost sync
      {
        // lost sync
        currentStatus.hasSync = false;
        currentStatus.syncLossCounter++;            
        toothSystemCount = 1; // first tooth after gap is always 1
        toothCurrentCount = 1; // Reset as we've lost sync
      }
    }
    else
    { 
      //Recalc the new filter value, only do this on the single gap tooth 
      setFilter(curGap);  
    }
    renixSystemLastMinusOneToothTime = renixSystemLastToothTime; // needed for target gap calculation
    renixSystemLastToothTime = curTime;

    if( toothSystemCount == 12  || toothLastToothTime == 0) // toothLastToothTime used to ensure we set the value so the code that handles the fuel pump in speeduino.ini has a value to use once the engine is running.
    {
      toothCurrentCount++;

      if( (configPage2.nCylinders == 6 && toothCurrentCount == 7) ||    // 6 Pretend teeth on the 66 tooth wheel, if get to severn rotate round back to first tooth
          (configPage2.nCylinders == 4 && toothCurrentCount == 5 ) )    // 4 Pretend teeth on the 44 tooth wheel, if get to five rotate round back to first tooth
      {
        toothOneMinusOneTime = toothOneTime;
        toothOneTime = curTime;
        currentStatus.hasSync = true;
        currentStatus.startRevolutions++; //Counter               
        revolutionOne = !revolutionOne;
        toothCurrentCount = 1;  
      }

      toothSystemCount = 1;
      toothLastMinusOneToothTime = toothLastToothTime;
      toothLastToothTime = curTime; 


      //NEW IGNITION MODE
      if( (configPage2.perToothIgn == true) && (!BIT_CHECK(currentStatus.engine, BIT_ENGINE_CRANK)) ) 
      {
        int16_t crankAngle = ( (toothCurrentCount - 1) * triggerToothAngle ) + configPage4.triggerAngle;
        crankAngle = ignitionLimits(crankAngle);
        if( (configPage4.sparkMode == IGN_MODE_SEQUENTIAL) && (revolutionOne == true) && (configPage4.TrigSpeed == CRANK_SPEED) )
        {
          crankAngle += 360;
          checkPerToothTiming(crankAngle, (configPage4.triggerTeeth + toothCurrentCount)); 
        }
        else{ checkPerToothTiming(crankAngle, toothCurrentCount); }
      }
    }
  } 
}

static uint16_t __attribute__((noinline)) calcEndTeeth_Renix(int ignitionAngle, uint8_t toothAdder) {
  int16_t tempEndTooth = ignitionAngle - configPage4.triggerAngle;
#ifdef USE_LIBDIVIDE
  tempEndTooth = libdivide::libdivide_s16_do(tempEndTooth, &divTriggerToothAngle);
#else
  tempEndTooth = tempEndTooth / (int16_t)triggerToothAngle;
#endif  
  tempEndTooth = tempEndTooth - 1;
  // Clamp to tooth count
  return clampToActualTeeth(clampToToothCount(tempEndTooth, toothAdder), toothAdder);
}

void triggerSetEndTeeth_Renix(void)
{
  byte toothAdder = 0;
  if( (configPage4.sparkMode == IGN_MODE_SEQUENTIAL) && (configPage4.TrigSpeed == CRANK_SPEED) ) { toothAdder = configPage4.triggerTeeth; }

  //Temp variables are used here to avoid potential issues if a trigger interrupt occurs part way through this function

  ignition1EndTooth = calcEndTeeth_Renix(ignition1EndAngle, toothAdder);
  ignition2EndTooth = calcEndTeeth_Renix(ignition2EndAngle, toothAdder);
  currentStatus.canin[1] = ignition2EndTooth;
  ignition3EndTooth = calcEndTeeth_Renix(ignition3EndAngle, toothAdder);
  ignition4EndTooth = calcEndTeeth_Renix(ignition4EndAngle, toothAdder);
#if IGN_CHANNELS >= 5
  ignition5EndTooth = calcEndTeeth_Renix(ignition5EndAngle, toothAdder);
#endif
#if IGN_CHANNELS >= 6
  ignition6EndTooth = calcEndTeeth_Renix(ignition6EndAngle, toothAdder);
#endif
#if IGN_CHANNELS >= 7
  ignition7EndTooth = calcEndTeeth_Renix(ignition7EndAngle, toothAdder);
#endif
#if IGN_CHANNELS >= 8
  ignition8EndTooth = calcEndTeeth_Renix(ignition8EndAngle, toothAdder);
#endif
}

/** @} */

/*****************************************************************
 * Rover MEMS decoder
 * Covers multiple trigger wheels used interchanbably over the range of MEMS units
 * Specifically covers teeth patterns on the primary trigger (crank)
 * 3 gap 14 gap 2 gap 13 gap
 * 11 gap 5 gap 12 gap 4 gap 
 * 2 gap 14 gap 3 gap 13 gap 
 * 17 gap 17 gap 
 *
 * Support no cam, single tooth Cam (or half moon cam), and multi tooth (5-3-2 teeth)
 *
 * @defgroup dec_rover_mems Rover MEMS all versions including T Series, O Series, Mini and K Series
 * @{
 */
volatile unsigned long roverMEMSTeethSeen = 0; // used for flywheel gap pattern matching

void triggerSetup_RoverMEMS()
{
  for(toothOneTime = 0; toothOneTime < 10; toothOneTime++)   // repurpose variable temporarily to help clear ToothAngles.
    { toothAngles[toothOneTime] = 0; }// Repurpose ToothAngles to store data needed for this implementation.
 
  triggerFilterTime = (MICROS_PER_SEC / (MAX_RPM / 60U * 36U)); //Trigger filter time is the shortest possible time (in uS) that there can be between crank teeth (ie at max RPM). Any pulses that occur faster than this time will be discarded as noise
  triggerSecFilterTime = (MICROS_PER_SEC / (MAX_RPM / 60U)); // only 1 tooth on the wheel not 36

  configPage4.triggerTeeth = 36;
  triggerToothAngle = 360 / configPage4.triggerTeeth; //The number of degrees that passes from tooth to tooth 360 / 36 theortical teeth
  triggerActualTeeth = 36; //The number of physical teeth on the wheel. Need to fix now so we can identify the wheel on the first rotation and not risk a  type 1 wheel not being spotted
  toothLastMinusOneToothTime = 0;
  toothCurrentCount = 0; // current tooth
  secondaryToothCount = 0;
  secondaryLastToothCount = 0; 
  toothOneTime = 0;
  toothOneMinusOneTime = 0;
  revolutionOne=0;

  MAX_STALL_TIME = ((MICROS_PER_DEG_1_RPM/50U) * triggerToothAngle * 2U); //Minimum 50rpm. (3333uS is the time per degree at 50rpm)
  BIT_SET(decoderState, BIT_DECODER_HAS_SECONDARY);

}

void triggerPri_RoverMEMS()
{
  curTime = micros();
  curGap = curTime - toothLastToothTime;      

  if ( curGap >= triggerFilterTime ) //Pulses should never be less than triggerFilterTime, so if they are it means a false trigger. (A 36-1 wheel at 8000pm will have triggers approx. every 200uS)
  {
    if( (toothLastToothTime > 0) && (toothLastMinusOneToothTime > 0) ) // have we seen more than 1 tooth so we start processing
    {   
      //Begin the missing tooth detection
      targetGap = (3 * (toothLastToothTime - toothLastMinusOneToothTime)) >> 1;  //Multiply by 1.5 (Checks for a gap 1.5x greater than the last one) (Uses bitshift to multiply by 3 then divide by 2. Much faster than multiplying by 1.5)
      currentStatus.hasSync = true;  
      if ( curGap > targetGap) // we've found a gap
      {
        roverMEMSTeethSeen = roverMEMSTeethSeen << 2; // add the space for the gap and the tooth we've just seen so shift 2 bits
        roverMEMSTeethSeen++; // add the tooth seen to the variable
        toothCurrentCount++; // Increment the tooth counter on the wheel (used to spot a revolution and trigger igition timing)

        // the missing tooth gap messing up timing as it appears in different parts of the cycle. Don't update setFilter as it would be wrong with the gap
        toothCurrentCount++;
      }
      else //Regular (non-missing) tooth so update things
      {    
        roverMEMSTeethSeen = roverMEMSTeethSeen << 1; // make a space, shift the bits 1 place to the left
        roverMEMSTeethSeen++; // add the tooth seen
        toothCurrentCount++; //Increment the tooth counter on the wheel (used to spot a revolution)
        setFilter(curGap);
      }

      // reduce checks to minimise cpu load when looking for key point to identify where we are on the wheel
      if( toothCurrentCount >= triggerActualTeeth )
      {                           //12345678901234567890123456789012 
        if( roverMEMSTeethSeen == 0b11111101111111011111111110111111) // Binary pattern for trigger pattern 9-7-10-6- (#5)
        {
          if(toothAngles[ID_TOOTH_PATTERN] != 5)
          {
            //teeth to skip when calculating RPM as they've just had a gap
            toothAngles[SKIP_TOOTH1] = 1;
            toothAngles[SKIP_TOOTH2] = 11;
            toothAngles[SKIP_TOOTH3] = 19;
            toothAngles[SKIP_TOOTH4] = 30;
            toothAngles[ID_TOOTH_PATTERN] = 5;
            configPage4.triggerMissingTeeth = 4; // this could be read in from the config file, but people could adjust it.
            triggerActualTeeth = 36; // should be 32 if not hacking toothcounter 
          }  
          triggerRoverMEMSCommon();                         
        }                             //123456789012345678901234567890123456
        else if( roverMEMSTeethSeen == 0b11011101111111111111101101111111) // Binary pattern for trigger pattern 3-14-2-13- (#4)
        {
          if(toothAngles[ID_TOOTH_PATTERN] != 4)
          {
            //teeth to skip when calculating RPM as they've just had a gap
            toothAngles[SKIP_TOOTH1] = 8;
            toothAngles[SKIP_TOOTH2] = 11;
            toothAngles[SKIP_TOOTH3] = 25;
            toothAngles[SKIP_TOOTH4] = 27;
            toothAngles[ID_TOOTH_PATTERN] = 4;
            configPage4.triggerMissingTeeth = 4; // this could be read in from the config file, but people could adjust it.
            triggerActualTeeth = 36; // should be 32 if not hacking toothcounter 
          }  
          triggerRoverMEMSCommon();                         
        }                             //123456789012345678901234567890123456
        else if(roverMEMSTeethSeen == 0b11011011111111111111011101111111) // Binary pattern for trigger pattern 2-14-3-13- (#3)
        {
          if(toothAngles[ID_TOOTH_PATTERN] != 3)
          {
            //teeth to skip when calculating RPM as they've just had a gap
            toothAngles[SKIP_TOOTH1] = 8;
            toothAngles[SKIP_TOOTH2] = 10;
            toothAngles[SKIP_TOOTH3] = 24;
            toothAngles[SKIP_TOOTH4] = 27;
            toothAngles[ID_TOOTH_PATTERN] = 3;
            configPage4.triggerMissingTeeth = 4; // this could be read in from the config file, but people could adjust it.
            triggerActualTeeth = 36; // should be 32 if not hacking toothcounter 
          } 
          triggerRoverMEMSCommon();                           
        }                             //12345678901234567890123456789012
        else if(roverMEMSTeethSeen == 0b11111101111101111111111110111101) // Binary pattern for trigger pattern 11-5-12-4- (#2)
        {
          if(toothAngles[ID_TOOTH_PATTERN] != 2)
          {
            //teeth to skip when calculating RPM as they've just had a gap
            toothAngles[SKIP_TOOTH1] = 1;
            toothAngles[SKIP_TOOTH2] = 12;
            toothAngles[SKIP_TOOTH3] = 17;
            toothAngles[SKIP_TOOTH4] = 29;
            toothAngles[ID_TOOTH_PATTERN] = 2;
            configPage4.triggerMissingTeeth = 4; // this could be read in from the config file, but people could adjust it.
            triggerActualTeeth = 36; // should be 32 if not hacking toothcounter 
          }  
          triggerRoverMEMSCommon();  
        }                             //12345678901234567890123456789012
        else if(roverMEMSTeethSeen == 0b11111111111101111111111111111101) // Binary pattern for trigger pattern 17-17- (#1)
        {
          if(toothAngles[ID_TOOTH_PATTERN] != 1)
          {
            //teeth to skip when calculating RPM as they've just had a gap
            toothAngles[SKIP_TOOTH1] = 1;
            toothAngles[SKIP_TOOTH2] = 18;
            toothAngles[ID_TOOTH_PATTERN] = 1;
            configPage4.triggerMissingTeeth = 2; // this should be read in from the config file, but people could adjust it.            
            triggerActualTeeth = 36; // should be 34 if not hacking toothcounter 
          }
          triggerRoverMEMSCommon(); 
        }
        else if(toothCurrentCount > triggerActualTeeth+1) // no patterns match after a rotation when we only need 32 teeth to match, we've lost sync
        {
          currentStatus.hasSync = false;
          if(secondaryToothCount > 0)
            BIT_SET(currentStatus.status3, BIT_STATUS3_HALFSYNC);
          else
            BIT_CLEAR(currentStatus.status3, BIT_STATUS3_HALFSYNC);
          currentStatus.syncLossCounter++;              
        }
      }
    }
    
    toothLastMinusOneToothTime = toothLastToothTime;
    toothLastToothTime = curTime;

    //NEW IGNITION MODE
    if( (configPage2.perToothIgn == true) && (!BIT_CHECK(currentStatus.engine, BIT_ENGINE_CRANK)) ) 
    {  
      int16_t crankAngle = ( (toothCurrentCount-1) * triggerToothAngle ) + configPage4.triggerAngle;
      crankAngle = ignitionLimits(crankAngle);
      if( (configPage4.sparkMode == IGN_MODE_SEQUENTIAL) && (revolutionOne == true))
      { crankAngle += 360; checkPerToothTiming(crankAngle, (configPage4.triggerTeeth + toothCurrentCount)); }
      else
      { checkPerToothTiming(crankAngle, toothCurrentCount); }
    }     
  }

}


static void triggerRoverMEMSCommon(void)
{
  // pattern 1 isn't unique & if we don't have a cam we need special code to identify if we're tooth 18 or 36 - this allows batch injection but not spark to run
  // as we have to be greater than 18 teeth when using the cam this code also works for that.
  if( toothCurrentCount > 18) 
  {
    toothCurrentCount = 1;
    toothOneMinusOneTime = toothOneTime;
    toothOneTime = curTime;
    revolutionOne = !revolutionOne; //Flip sequential revolution tracker   
  }
         
  //if Sequential fuel or ignition is in use, further checks are needed before determining sync
  if( (configPage4.sparkMode == IGN_MODE_SEQUENTIAL) || (configPage2.injLayout == INJ_SEQUENTIAL) )
  {
    //If either fuel or ignition is sequential, only declare sync if the cam tooth has been seen OR if the missing wheel is on the cam
    if( (secondaryToothCount > 0) || (configPage4.TrigSpeed == CAM_SPEED) )
    {
      currentStatus.hasSync = true;
      BIT_CLEAR(currentStatus.status3, BIT_STATUS3_HALFSYNC); //the engine is fully synced so clear the Half Sync bit
      if(configPage4.trigPatternSec == SEC_TRIGGER_SINGLE) { secondaryToothCount = 0; } //Reset the secondary tooth counter to prevent it overflowing
    }
    else if(currentStatus.hasSync != true) 
    { BIT_SET(currentStatus.status3, BIT_STATUS3_HALFSYNC); } //If there is primary trigger but no secondary we only have half sync.
  }
  else { currentStatus.hasSync = true;  BIT_CLEAR(currentStatus.status3, BIT_STATUS3_HALFSYNC); } //If nothing is using sequential, we have sync and also clear half sync bit
          
  if(currentStatus.hasSync == true)
  { currentStatus.startRevolutions++; }
  else 
  { currentStatus.startRevolutions = 0; }
}




int getCrankAngle_RoverMEMS() 
{
    //This is the current angle ATDC the engine is at. This is the last known position based on what tooth was last 'seen'. It is only accurate to the resolution of the trigger wheel (Eg 36-1 is 10 degrees)
    unsigned long tempToothLastToothTime;
    int tempToothCurrentCount;
    bool tempRevolutionOne;
    //Grab some variables that are used in the trigger code and assign them to temp variables.
    noInterrupts();
    tempToothCurrentCount = toothCurrentCount;
    tempRevolutionOne = revolutionOne;
    tempToothLastToothTime = toothLastToothTime;
    interrupts();

    int crankAngle = ((tempToothCurrentCount - 1) * triggerToothAngle) + configPage4.triggerAngle; //Number of teeth that have passed since tooth 1, multiplied by the angle each tooth represents, plus the angle that tooth 1 is ATDC. This gives accuracy only to the nearest tooth.
    
    //Sequential check (simply sets whether we're on the first or 2nd revolution of the cycle)
    if ( (tempRevolutionOne == true) && (configPage4.TrigSpeed == CRANK_SPEED) ) { crankAngle += 360; }

    lastCrankAngleCalc = micros();
    elapsedTime = (lastCrankAngleCalc - tempToothLastToothTime);
    crankAngle += timeToAngleDegPerMicroSec(elapsedTime);

    if (crankAngle >= 720) { crankAngle -= 720; }
    if (crankAngle < 0) { crankAngle += CRANK_ANGLE_MAX; }

    return crankAngle;
}

void triggerSec_RoverMEMS() 
{
  curTime2 = micros();
  curGap2 = curTime2 - toothLastSecToothTime;

  //Safety check for initial startup
  if( (toothLastSecToothTime == 0) )
  { 
    targetGap2 = curGap * 2;
    curGap2 = 0; 
    toothLastSecToothTime = curTime2;
  }
  
  if ( curGap2 >= triggerSecFilterTime )
  {
    secondaryToothCount++;
    toothLastSecToothTime = curTime2;
    

    //Record the VVT Angle
    if( configPage6.vvtEnabled > 0 &&
        ( (configPage4.trigPatternSec == SEC_TRIGGER_SINGLE) || 
          (configPage4.trigPatternSec == SEC_TRIGGER_5_3_2 && secondaryToothCount == 6 ) ) )
    {
      int16_t curAngle;
      curAngle = getCrankAngle();
      while(curAngle > 360) { curAngle -= 360; }
      curAngle -= configPage4.triggerAngle; //Value at TDC
      if( configPage6.vvtMode == VVT_MODE_CLOSED_LOOP ) { curAngle -= configPage10.vvtCLMinAng; }

      currentStatus.vvt1Angle = curAngle;
    }

    if(configPage4.trigPatternSec == SEC_TRIGGER_SINGLE)
    {
      //Standard single tooth cam trigger
      revolutionOne = true;
      triggerSecFilterTime = curGap2 >> 1; //Next secondary filter is half the current gap        
    }
    else if (configPage4.trigPatternSec == SEC_TRIGGER_5_3_2) // multi tooth cam 
    {
      if (curGap2 < targetGap2) // ie normal tooth sized gap, not a single or double gap
      {
        triggerSecFilterTime = curGap2 >> 1; //Next secondary filter is half the current gap        
        targetGap2 = (3 * (curGap2)) >> 1;  //Multiply by 1.5 (Checks for a gap 1.5x greater than the last one) (Uses bitshift to multiply by 3 then divide by 2. Much faster than multiplying by 1.5)        
      }
      else
      {  
        // gap either single or double - nb remember we've got the tooth after the gap, so on the 5 tooth pattern we'll see here tooth 6
        if(secondaryToothCount == 6)
        {
          // if we've got the tooth after the gap from reading 5 teeth we're on cycle 360-720 & tooth 18-36
          revolutionOne = false;
          if(toothCurrentCount < 19)
          {
            toothCurrentCount += 18;
          }
        }
        else if (secondaryToothCount == 4)
        {
          // we've got the tooth after the gap from reading 3 teeth we're on cycle 0-360 & tooth 1-18
          revolutionOne = true;
          if(toothCurrentCount > 17)
          {
            toothCurrentCount -= 18;
          }
        }
        else if (secondaryToothCount == 3)
        {
          // if we've got the tooth after the gap from reading 2 teeth we're on cycle 0-360 & tooth 18-36
          revolutionOne = true;
          if(toothCurrentCount < 19)
          {
            toothCurrentCount += 18;
          }
        }
        secondaryToothCount = 1; // as we've had a gap we need to reset to this being the first tooth after the gap
      }
    }
  } //Trigger filter
}

uint16_t getRPM_RoverMEMS() 
{
  uint16_t tempRPM = 0;

  if( currentStatus.RPM < currentStatus.crankRPM)
  {
    if( (toothCurrentCount != (unsigned int) toothAngles[SKIP_TOOTH1]) && 
        (toothCurrentCount != (unsigned int) toothAngles[SKIP_TOOTH2]) && 
        (toothCurrentCount != (unsigned int) toothAngles[SKIP_TOOTH3]) && 
        (toothCurrentCount != (unsigned int) toothAngles[SKIP_TOOTH4]) )
    { tempRPM = crankingGetRPM(36, CRANK_SPEED); }
    else
    { tempRPM = currentStatus.RPM; } //Can't do per tooth RPM as the missing tooth messes the calculation
  }
  else
  { tempRPM = stdGetRPM(CRANK_SPEED); }
  return tempRPM;
}


void triggerSetEndTeeth_RoverMEMS()
{
  //Temp variables are used here to avoid potential issues if a trigger interrupt occurs part way through this function
  int16_t tempIgnitionEndTooth[5]; // cheating with the array - location 1 is spark 1, location 0 not used.   
  int16_t toothAdder = 0;

  if( (configPage4.sparkMode == IGN_MODE_SEQUENTIAL) && (configPage4.TrigSpeed == CRANK_SPEED) ) { toothAdder = 36; }

  tempIgnitionEndTooth[1] = ( (ignition1EndAngle - configPage4.triggerAngle) / (int16_t)(10) ) - 1;
  if(tempIgnitionEndTooth[1] > (36 + toothAdder)) { tempIgnitionEndTooth[1] -= (36 + toothAdder); }
  if(tempIgnitionEndTooth[1] <= 0) { tempIgnitionEndTooth[1] += (36 + toothAdder); }
  if(tempIgnitionEndTooth[1] > (36 + toothAdder)) { tempIgnitionEndTooth[1] = (36 + toothAdder); }
 
  tempIgnitionEndTooth[2] = ( (ignition2EndAngle - configPage4.triggerAngle) / (int16_t)(10) ) - 1;
  if(tempIgnitionEndTooth[2] > (36 + toothAdder)) { tempIgnitionEndTooth[2] -= (36 + toothAdder); }
  if(tempIgnitionEndTooth[2] <= 0) { tempIgnitionEndTooth[2] += (36 + toothAdder); }
  if(tempIgnitionEndTooth[2] > (36 + toothAdder)) { tempIgnitionEndTooth[2] = (36 + toothAdder); }
 
  tempIgnitionEndTooth[3] = ( (ignition3EndAngle - configPage4.triggerAngle) / (int16_t)(10) ) - 1;
  if(tempIgnitionEndTooth[3] > (36 + toothAdder)) { tempIgnitionEndTooth[3] -= (36 + toothAdder); }
  if(tempIgnitionEndTooth[3] <= 0) { tempIgnitionEndTooth[3] += (36 + toothAdder); }
  if(tempIgnitionEndTooth[3] > (36 + toothAdder)) { tempIgnitionEndTooth[3] = (36 + toothAdder); }

  tempIgnitionEndTooth[4] = ( (ignition4EndAngle - configPage4.triggerAngle) / (int16_t)(10) ) - 1;
  if(tempIgnitionEndTooth[4] > (36 + toothAdder)) { tempIgnitionEndTooth[4] -= (36 + toothAdder); }
  if(tempIgnitionEndTooth[4] <= 0) { tempIgnitionEndTooth[4] += (36 + toothAdder); }
  if(tempIgnitionEndTooth[4] > (36 + toothAdder)) { tempIgnitionEndTooth[4] = (36 + toothAdder); }

  // take into account the missing teeth on the Rover flywheels
  int tempCount=0;
 
  if(configPage4.sparkMode == IGN_MODE_SEQUENTIAL)
  {
    // check the calculated trigger tooth exists, if it doesn't use the previous tooth
    // nb the toothAngles[x] holds the tooth after the gap, hence the '-1' to see if it matches a gap
 
    for(tempCount=1;tempCount <5;tempCount++)
    {
      if(tempIgnitionEndTooth[tempCount] == (toothAngles[1]) || tempIgnitionEndTooth[tempCount] == (toothAngles[2]) ||
         tempIgnitionEndTooth[tempCount] == (toothAngles[3]) || tempIgnitionEndTooth[tempCount] == (toothAngles[4]) ||
         tempIgnitionEndTooth[tempCount] == (36 + toothAngles[1]) || tempIgnitionEndTooth[tempCount] == (36 + toothAngles[2]) ||
         tempIgnitionEndTooth[tempCount] == (36 + toothAngles[3]) || tempIgnitionEndTooth[tempCount] == (36 + toothAngles[4])  )
      { tempIgnitionEndTooth[tempCount]--; }
    }
  }
  else
  {
    for(tempCount=1;tempCount<5;tempCount++)
    {
      if(tempIgnitionEndTooth[tempCount] == (toothAngles[1]) || tempIgnitionEndTooth[tempCount] == (toothAngles[2]) )
      { tempIgnitionEndTooth[tempCount]--; }  
    }
  }
  
  
  ignition1EndTooth = tempIgnitionEndTooth[1];  
  ignition2EndTooth = tempIgnitionEndTooth[2];
  ignition3EndTooth = tempIgnitionEndTooth[3];
  ignition4EndTooth = tempIgnitionEndTooth[4];
}
/** @} */

/** Suzuki K6A 3 cylinder engine

* (See: https://www.msextra.com/forums/viewtopic.php?t=74614)
* @defgroup Suzuki_K6A Suzuki K6A 
* @{
*/
void triggerSetup_SuzukiK6A(void)
{
  triggerToothAngle = 90; //The number of degrees that passes from tooth to tooth (primary) - set to a value, needs to be set per tooth
  toothCurrentCount = 99; //Fake tooth count represents no sync

  configPage4.TrigSpeed = CAM_SPEED;
  triggerActualTeeth = 7;
  toothCurrentCount = 1;
  curGap = curGap2 = curGap3 = 0;

  if(currentStatus.initialisationComplete == false) { toothLastToothTime = micros(); } //Set a startup value here to avoid filter errors when starting. This MUST have the initial check to prevent the fuel pump just staying on all the time
  else { toothLastToothTime = 0; }
  toothLastMinusOneToothTime = 0;

  // based on data in msextra page linked to above we can deduce,
  // gap between rising and falling edge of a normal 70 degree tooth is 48 degrees, this means the gap is 70 degrees - 48 degrees = 22 degrees.
  // assume this is constant for all similar sized gaps and teeth
  // sync tooth is 35 degrees - eyeball looks like the tooth is 50% tooth and 50% gap so guess its 17 degrees and 18 degrees.

  // coded every tooth here in case you want to try "change" setting on the trigger setup (this is defined in init.ino and what i've set it to, otherwise you need code to select rising or falling in init.ino (steal it from another trigger)). 
  // If you don't want change then drop the 'falling' edges listed below and half the number of edges + reduce the triggerActualTeeth
  // nb as you can edit the trigger offset using rising or falling edge setup below is irrelevant as you can adjust via the trigger offset to cover the difference.

  // not using toothAngles[0] as i'm hoping it makes logic easier

  toothAngles[1] = 0;                   // 0 TDC cylinder 1, 
  toothAngles[2] = 170;                 // 170 - end of cylinder 1, start of cylinder 3, trigger ignition for cylinder 3 on this tooth
  toothAngles[3] = 240;                 // 70 TDC cylinder 3
  toothAngles[4] = 410;                 // 170  - end of cylinder 3, start of cylinder2, trigger ignition for cylinder 2 on this tooth
  toothAngles[5] = 480;                 // 70 TDC cylinder 2 
  toothAngles[6] = 515;                 // 35 Additional sync tooth
  toothAngles[7] = 650;                 // 135 end of cylinder 2, start of cylinder 1, trigger ignition for cylinder 1 on this tooth
  toothAngles[8] = 720;                 // 70 - gap to rotation to TDC1. array item 1 and 8 are the same, code never gets here its for reference only

  
  MAX_STALL_TIME = (3333UL * triggerToothAngle); //Minimum 50rpm. (3333uS is the time per degree at 50rpm)
  triggerFilterTime = 1500; //10000 rpm, assuming we're triggering on both edges off the crank tooth.
  triggerSecFilterTime = 0; //Need to figure out something better for this
  BIT_CLEAR(decoderState, BIT_DECODER_HAS_FIXED_CRANKING);
  BIT_CLEAR(decoderState, BIT_DECODER_TOOTH_ANG_CORRECT);
  BIT_CLEAR(decoderState, BIT_DECODER_HAS_SECONDARY); // never sure if we need to set this in this type of trigger
  BIT_CLEAR(currentStatus.status3, BIT_STATUS3_HALFSYNC); // we can never have half sync - its either full or none.
  BIT_CLEAR(decoderState, BIT_DECODER_2ND_DERIV);
  BIT_SET(decoderState, BIT_DECODER_IS_SEQUENTIAL);
}

void triggerPri_SuzukiK6A(void)
{
  curTime = micros();  
  curGap = curTime - toothLastToothTime;
  if ( (curGap >= triggerFilterTime) || (currentStatus.startRevolutions == 0) )
  {    
    toothCurrentCount++;
    BIT_SET(decoderState, BIT_DECODER_VALID_TRIGGER); //Flag this pulse as being a valid trigger (ie that it passed filters)

    toothLastMinusOneToothTime = toothLastToothTime;
    toothLastToothTime = curTime;


    // now to figure out if its a normal tooth or the extra sync tooth
    // pattern is normally small tooth, big tooth, small tooth, big tooth. The extra tooth breaks the pattern go it goes, big tooth (curGap3), small tooth(curGap2), small tooth(curGap)
    // reuse curGap2 and curGap3 (from secondary and Tertiary decoders) to store previous tooth sizes as not needed in this decoder.
    
    if ( (  curGap <= curGap2 ) && 
         ( curGap2 <= curGap3 ) )
    {
      // cur Gap is smaller than last gap & last gap is smaller than gap before that - means we must be on sync tooth
      toothCurrentCount = 6; // set tooth counter to correct tooth
      currentStatus.hasSync = true;
    }
    
    curGap3 = curGap2; // update values for next time we're in the loop
    curGap2 = curGap;
    
    
    if( (toothCurrentCount == (triggerActualTeeth + 1)) && currentStatus.hasSync == true  )
    {
      // seen enough teeth to have a revolution of the crank
      toothCurrentCount = 1; //Reset the counter
      toothOneMinusOneTime = toothOneTime;
      toothOneTime = curTime;
      currentStatus.startRevolutions = currentStatus.startRevolutions + 2; // increment for 2 revs as we do 720 degrees on the the crank       
    }
    else if (toothCurrentCount > (triggerActualTeeth + 1))
    {
      // Lost sync
      currentStatus.hasSync = false; 
      currentStatus.syncLossCounter++;
      triggerFilterTime = 0;
      toothCurrentCount=0;
    }

    // check gaps match with tooth to check we have sync 
    // so if we *think* we've seen tooth 3 whose gap should be smaller than the previous tooth & it isn't, 
    // then we've lost sync
    switch (toothCurrentCount)
    {
      case 1:
      case 3:      
      case 5:      
      case 6:
        // current tooth gap is bigger than previous tooth gap = syncloss
        // eg tooth 3 should be smaller than tooth 2 gap, if its not then we've lost sync and the tooth 3 we've just seen isn't really tooth 3
        if (curGap > curGap2)
        { 
          currentStatus.hasSync = false; 
          currentStatus.syncLossCounter++;
          triggerFilterTime = 0;
          toothCurrentCount=2;
        }          
        break;

      case 2:
      case 4:
      case 7:
        // current tooth gap is smaller than the previous tooth gap = syncloss
        // eg tooth 2 should be bigger than tooth 1, if its not then we've got syncloss
        if (curGap < curGap2)
        { 
          currentStatus.hasSync = false; 
          currentStatus.syncLossCounter++;
          triggerFilterTime = 0;
          toothCurrentCount=1;
        }
        break;
    }

    // Setup data to allow other areas of the system to work due to odd sized teeth - this could be merged with sync checking above, left separate to keep code clearer as its doing only one function at once
    // % of filter are not based on previous tooth size but expected next tooth size
    // triggerToothAngle is the size of the previous tooth not the future tooth
    if (currentStatus.hasSync == true )
    {
      switch (toothCurrentCount) // Set tooth angle based on previous gap and triggerFilterTime based on previous gap and next gap
      {
        case 2:
        case 4:
          // equivalent of tooth 1 except we've not done rotation code yet so its 8
          // 170 degree tooth, next tooth is 70
          switch (configPage4.triggerFilter)
          {
            case 1: // 25 % 17 degrees
              triggerFilterTime = curGap>>3;
              break;
            case 2: // 50 % 35 degrees
              triggerFilterTime = (curGap>>3) + (curGap>>4);
              break;
            case 3: // 75 % 52 degrees
              triggerFilterTime = (curGap>>2) + (curGap>>4);
              break;
            default:
              triggerFilterTime = 0;
              break;
          }          
          break;

        case 5:
          // 70 degrees, next tooth is 35
          switch (configPage4.triggerFilter)
          {
            case 1: // 25 % 8 degrees
              triggerFilterTime = curGap>>3;
              break;
            case 2: // 50 % 17 degrees
              triggerFilterTime = curGap>>2;
              break;
            case 3: // 75 % 25 degrees
              triggerFilterTime = (curGap>>2) + (curGap>>3);
              break;
            default:
              triggerFilterTime = 0;
              break;
          }
          break;

        case 6:
          // sync tooth, next tooth is 135
          switch (configPage4.triggerFilter)
          {
            case 1: // 25 % 33 degrees
              triggerFilterTime = curGap;
              break;
            case 2: // 50 % 67 degrees
              triggerFilterTime = curGap * 2;
              break;
            case 3: // 75 % 100 degrees
              triggerFilterTime = curGap * 3;
              break;
            default:
              triggerFilterTime = 0;
              break;
          }
          break;

        case 7:
          // 135 degre tooth, next tooth is 70
          switch (configPage4.triggerFilter)
          {
            case 1: // 25 % 17 degrees
              triggerFilterTime = curGap>>3;
              break;
            case 2: // 50 % 35 degrees
              triggerFilterTime = curGap>>2;
              break;
            case 3: // 75 % 52 degrees
              triggerFilterTime = (curGap>>2) + (curGap>>3);
              break;
            default:
              triggerFilterTime = 0;
              break;
          }          
          break;

        case 1:
        case 3:
          // 70 degree tooth, next tooth is 170
          switch (configPage4.triggerFilter)
          {
            case 1: // 25 % 42 degrees
              triggerFilterTime = (curGap>>1) + (curGap>>3);
              break;
            case 2: // 50 % 85 degrees
              triggerFilterTime = curGap + (curGap>>2);
              break;
            case 3: // 75 % 127 degrees
              triggerFilterTime = curGap + (curGap>>1) + (curGap>>2);
              break;
            default:
              triggerFilterTime = 0;
              break;
          }
          break;

      }
      
      //NEW IGNITION MODE
      if( (configPage2.perToothIgn == true) ) 
      {  
        int16_t crankAngle = toothAngles[toothCurrentCount] + configPage4.triggerAngle;
        crankAngle = ignitionLimits(crankAngle);
        checkPerToothTiming(crankAngle, toothCurrentCount);
      }     

    } // has sync

  } //Trigger filter

}

void triggerSec_SuzukiK6A(void)
{
  return;
}

uint16_t getRPM_SuzukiK6A(void)
{
  //Cranking code needs working out. 

  uint16_t tempRPM;

  tempRPM = stdGetRPM(720);
  MAX_STALL_TIME = revolutionTime << 1; //Set the stall time to be twice the current RPM. This is a safe figure as there should be no single revolution where this changes more than this
  if(MAX_STALL_TIME < 366667UL) { MAX_STALL_TIME = 366667UL; } //Check for 50rpm minimum

  return tempRPM;
}

int getCrankAngle_SuzukiK6A(void)
{
  int crankAngle = 0;

  //This is the current angle ATDC the engine is at. This is the last known position based on what tooth was last 'seen'. It is only accurate to the resolution of the trigger wheel (Eg 36-1 is 10 degrees)
  unsigned long tempToothLastToothTime;
  int tempToothCurrentCount;
  //Grab some variables that are used in the trigger code and assign them to temp variables.
  noInterrupts();
  tempToothCurrentCount = toothCurrentCount;
  tempToothLastToothTime = toothLastToothTime;
  lastCrankAngleCalc = micros(); //micros() is no longer interrupt safe
  interrupts();

  crankAngle = toothAngles[(tempToothCurrentCount)] + configPage4.triggerAngle; //Perform a lookup of the fixed toothAngles array to find what the angle of the last tooth passed was.
  
  //Estimate the number of degrees travelled since the last tooth}
  elapsedTime = (lastCrankAngleCalc - tempToothLastToothTime);

  switch(toothCurrentCount)
  {
    case 2:
    case 4:
      // equivalent of tooth 1 except we've not done rotation code yet so its 8
      // 170 degree tooth, next tooth is 70          
      triggerToothAngle = 170;
      break;

    case 5:
      // 70 degrees, next tooth is 35
      triggerToothAngle = 70;
      break;

    case 6:
      // sync tooth, next tooth is 135
      triggerToothAngle = 35;
      break;

    case 7:
      // 135 degre tooth, next tooth is 70
      triggerToothAngle = 135;
      break;

    case 1:
    case 3:
      // 70 degree tooth, next tooth is 170
      triggerToothAngle = 70;
      break;
  }
  crankAngle += timeToAngleDegPerMicroSec(elapsedTime);
  if (crankAngle >= 720) { crankAngle -= 720; }
//  if (crankAngle > CRANK_ANGLE_MAX) { crankAngle -= CRANK_ANGLE_MAX; } not needed, crank angle max gets max from injection or ignition, we have to be over 720 degrees so can ignore
  if (crankAngle < 0) { crankAngle += 720; }   

  return crankAngle;
}

// Assumes no advance greater than 48 degrees. Triggers on the tooth before the ignition event
void triggerSetEndTeeth_SuzukiK6A(void)
{
  byte nCount, bExit;

  //Temp variables are used here to avoid potential issues if a trigger interrupt occurs part way through this function
  int16_t tempIgnitionEndTooth;

  tempIgnitionEndTooth = (ignition1EndAngle - configPage4.triggerAngle);

  tempIgnitionEndTooth = ignitionLimits(tempIgnitionEndTooth);

  for (nCount = 1, bExit = false; nCount < 8 && bExit == false; nCount++)
  {
    if(tempIgnitionEndTooth <= toothAngles[nCount])
    { 
      // The tooth we want is the tooth prior to this one.     
      tempIgnitionEndTooth = nCount-1;
      if (tempIgnitionEndTooth <= 0)
      { tempIgnitionEndTooth = 7; }    
      bExit = true;
    }
  }
  if(nCount == 8)
  { tempIgnitionEndTooth = 7; } // didn't find a match, use tooth 7 as it must be greater than 7 but less than 1.  
  ignition1EndTooth = tempIgnitionEndTooth;

  //--------------------

  tempIgnitionEndTooth = (ignition2EndAngle - configPage4.triggerAngle);
  tempIgnitionEndTooth = ignitionLimits(tempIgnitionEndTooth);
  
  for (nCount = 1, bExit = false; nCount < 8 && bExit == false; nCount++)
  {
    if(tempIgnitionEndTooth <= toothAngles[nCount])
    { 
      // The tooth we want is the tooth prior to this one.     
      tempIgnitionEndTooth = nCount-1;
      if (tempIgnitionEndTooth <= 0)
      { tempIgnitionEndTooth = 7; }    
      bExit = true; // force exit from loop   
    }
  }
  if(nCount == 8)
  { tempIgnitionEndTooth = 7; } // didn't find a match, use tooth 7 as it must be greater than 7 but less than 1.  
  ignition2EndTooth = tempIgnitionEndTooth;

  //--------------

  tempIgnitionEndTooth = (ignition3EndAngle - configPage4.triggerAngle);
  tempIgnitionEndTooth = ignitionLimits(tempIgnitionEndTooth);
  
  for (nCount = 1, bExit = false; nCount < 8 && bExit == false; nCount++)
  {
    if(tempIgnitionEndTooth <= toothAngles[nCount])
    { 
      // The tooth we want is the tooth prior to this one.     
      tempIgnitionEndTooth = nCount-1;
      if (tempIgnitionEndTooth <= 0)
      { tempIgnitionEndTooth = 7; }    
      bExit = true; // force exit from loop   
    }
  }
  if(nCount == 8)
  { tempIgnitionEndTooth = 7; } // didn't find a match, use tooth 7 as it must be greater than 7 but less than 1.  
  ignition3EndTooth = tempIgnitionEndTooth;
}
/** @} */