speeduino-personal/speeduino/crankMaths.h

#ifndef CRANKMATHS_H
#define CRANKMATHS_H

#define CRANKMATH_METHOD_INTERVAL_DEFAULT  0
#define CRANKMATH_METHOD_INTERVAL_REV      1
#define CRANKMATH_METHOD_INTERVAL_TOOTH    2
#define CRANKMATH_METHOD_ALPHA_BETA        3
#define CRANKMATH_METHOD_2ND_DERIVATIVE    4

//#define fastDegreesToUS(targetDegrees) ((targetDegrees) * (unsigned long)timePerDegree)
#define fastDegreesToUS(targetDegrees) (((targetDegrees) * (unsigned long)timePerDegreex16) >> 4)
#define fastTimeToAngle(time) (((unsigned long)time * degreesPeruSx2048) / 2048) //Divide by 2048 will be converted at compile time to bitshift

#define ignitionLimits(angle) ( (((int16_t)angle) >= CRANK_ANGLE_MAX_IGN) ? (angle - CRANK_ANGLE_MAX_IGN) : ( (angle < 0) ? (angle + CRANK_ANGLE_MAX_IGN) : angle) )


unsigned long angleToTime(int16_t, byte);
uint16_t timeToAngle(unsigned long, byte);
void doCrankSpeedCalcs();

volatile uint16_t timePerDegree;
volatile uint16_t timePerDegreex16;
volatile uint16_t degreesPeruSx2048;

//These are only part of the experimental 2nd deriv calcs
byte deltaToothCount = 0; //The last tooth that was used with the deltaV calc
int rpmDelta;

#endif