advice needed for arduino as diesel injection brain...

Projects Programming
56

Hello there, got the basic timer code working:

#include "TimerOne.h"
#include "TimerThree.h"

int ledPin = 13;
volatile int state = LOW;
volatile int InjectionCycle1  = false;

void setup() 
{
  pinMode(ledPin, OUTPUT);
  attachInterrupt(0, Inject1, RISING); // interrupt 0 = pin 2
  Timer1.initialize(1000000);
  Timer1.stop(); //stop the counter
  Timer1.disablePwm(9); // disables PWM on pin 9
  Timer1.disablePwm(10); // disables PWM on pin 10
  Serial.begin(9600);
}
 
void loop()
{
}

void Inject1()
{
  if (InjectionCycle1 == false)
  {
    Serial.print("start injection cycle: ");
    Serial.println (millis());
    InjectionCycle1 = true;
    Timer1.setPeriod(1000000);
    Timer1.attachInterrupt(OpenInjector1);
  }
}

void OpenInjector1()
{
  if (InjectionCycle1 == true)
  {
    Serial.print("open injector: ");
    Serial.println (millis());
    digitalWrite(ledPin, HIGH);
    Timer1.stop();
    Timer1.detachInterrupt();
    Timer1.setPeriod(2000000);
    Timer1.attachInterrupt(CloseInjector1);
  }
}

void CloseInjector1()
{
  if (InjectionCycle1 == true)
  {
    Serial.print("close injector: ");
    Serial.println (millis());
    Serial.println ("");
    digitalWrite(ledPin, LOW);
    InjectionCycle1 = false;
    Timer1.stop();
    Timer1.detachInterrupt();
  }
}

Tested this and it works as expected, next step integrate all other stuff, will port when I have it complete.
In this setup the timer replace delay. (and is not stalling the loop like delay)

edited since in first instance I used Timer1 and Timer3 both for both delays:
Using one timer for the cycle works also good so I can use Timer1 for cylinders 1 and 4 and Timer3 for cylinders 2 and 3.
Since the firing order is 1-3-4-2 there is 180 crank degree extra time between interrupt firing cycles, better would be a per cylinder dedicated timer but rewriting the Timer1 code for the extra timers on the mega is out off my league...