128 lines
2.6 KiB
C++
128 lines
2.6 KiB
C++
/* FORD 1996 CKP crank signal simulator 36-1
|
|
by Ichabod mudd
|
|
*/
|
|
#include "Arduino.h"
|
|
#define PULSE_PIN 10
|
|
#define CAM_PIN 8
|
|
#define MPH_PIN 12
|
|
#define POT_PIN 0
|
|
|
|
#define MAX_DELAY 20000
|
|
#define MIN_DELAY 833
|
|
|
|
#define PULSE_DURATION 50
|
|
|
|
int mph_toggle = 1 ;
|
|
int val;
|
|
unsigned int pulse_gap;
|
|
int RPMdirection = 0;
|
|
|
|
// the setup routine runs once when you press reset:
|
|
void setup()
|
|
{
|
|
pinMode(PULSE_PIN, OUTPUT);
|
|
pinMode(CAM_PIN, OUTPUT);
|
|
pinMode(MPH_PIN, OUTPUT);
|
|
|
|
Serial.begin(9600);
|
|
pulse_gap = MIN_DELAY;
|
|
}
|
|
|
|
|
|
//reluctor wheel
|
|
// subroutines first
|
|
|
|
//function to first go HiGH
|
|
|
|
void triggerHigh(int duration, int count)
|
|
{
|
|
switch (count)
|
|
{
|
|
case 1: // cam CMP pin 8
|
|
digitalWrite(CAM_PIN, HIGH);
|
|
break;
|
|
case 2:
|
|
digitalWrite(CAM_PIN, LOW);
|
|
digitalWrite(MPH_PIN, LOW); //VSS
|
|
break;
|
|
|
|
case 12:
|
|
digitalWrite(CAM_PIN, HIGH);
|
|
break;
|
|
case 13:
|
|
digitalWrite(CAM_PIN, LOW);
|
|
break;
|
|
case 24:
|
|
digitalWrite(CAM_PIN, HIGH);
|
|
break;
|
|
case 25:
|
|
digitalWrite(CAM_PIN, LOW);
|
|
break;
|
|
} // end cases
|
|
|
|
|
|
//hold CKP PIN high for this delay.
|
|
digitalWrite(PULSE_PIN, HIGH);
|
|
delayMicroseconds(PULSE_DURATION);
|
|
// now CKP go low
|
|
digitalWrite(PULSE_PIN, LOW);
|
|
// end function
|
|
}
|
|
|
|
|
|
//Simulates a 36 tooth reluctor wheel
|
|
//with a 1 tooth reference
|
|
|
|
// begin main loop program section
|
|
void loop()
|
|
{
|
|
// read potentiometer wiper pin 0?
|
|
// analog A/D channel 0
|
|
val = analogRead(POT_PIN);
|
|
pulse_gap = map(val, 0, 1023, MIN_DELAY, MAX_DELAY);
|
|
Serial.println(pulse_gap);
|
|
/*
|
|
if (RPMdirection == 0)
|
|
{
|
|
if (pulse_gap < MAX_DELAY) { pulse_gap++; }
|
|
else
|
|
{
|
|
RPMdirection = 1;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if (pulse_gap > MIN_DELAY) { pulse_gap--; }
|
|
else
|
|
{
|
|
RPMdirection = 0;
|
|
}
|
|
}
|
|
*/
|
|
// for loop 36 counts , 150 uS to 1000 uS or 5000 to 800 rpm
|
|
for (int i = 0; i < 11; i++)
|
|
{
|
|
// go high then low , in Symmetry
|
|
digitalWrite(PULSE_PIN, HIGH);
|
|
delayMicroseconds(PULSE_DURATION);
|
|
digitalWrite(PULSE_PIN, LOW);
|
|
if (pulse_gap < 15000) //delayMicroseconds() only works with values up to 16383. Switch to delay() at 15000 to be safe
|
|
{
|
|
delayMicroseconds( (pulse_gap - PULSE_DURATION) );
|
|
}
|
|
else
|
|
{
|
|
delay ( (pulse_gap - PULSE_DURATION) / 1000 );
|
|
}
|
|
}
|
|
// simulate the missing tooth next
|
|
delayMicroseconds( (pulse_gap) );
|
|
|
|
}
|
|
// end main loop version 7 , now perfect 800 rpm to 5000
|
|
// added cam pulse 7/4/2013
|
|
// using Delay calls, suck but , this is easy.
|
|
// the switch case trick, gets the cam sensor working.
|
|
// the engine fires every 120 degr. on crank, 12 teeth, and 10 degr per tooth=120
|
|
// added MPH pin, for VSS signals to ECU
|