ignitionISRs.c File Reference

Turn ignition channels on and off. More...

#include "inc/freeEMS.h"
#include "inc/interrupts.h"

Include dependency graph for ignitionISRs.c:

Go to the source code of this file.

Defines
#define	IGNITIONISRS_C
Functions
void	IgnitionDwellISR (void)
	Ignition dwell control.
void	IgnitionFireISR (void)
	Ignition discharge control.

---

Detailed Description

Turn ignition channels on and off.

This currently semi-working but broken code is intended to one day provide multi-channel ignition capabilities. The basic method will be to turn a pin or set of pins on or another pin or set of pins off during each run of the appropriate handler. Each run will be triggered either by the scheduler and possibly this code itself as well. Currently it does not work correctly and isn't suitable for actual use as an ignition control solution.

Definition in file ignitionISRs.c.

---

Define Documentation

#define IGNITIONISRS_C

Definition at line 41 of file ignitionISRs.c.

---

Function Documentation

void IgnitionDwellISR

(

void

)

Ignition dwell control.

This function turns ignition pins on to dwell when required.

Author:

Fred Cooke

Todo:

TODO make this actually work.

Definition at line 73 of file ignitionISRs.c.

References engineSetting::combustionEventsPerEngineCycle, DWELL_DISABLE, DWELL_ENABLE, dwellQueueLength, dwellStartMasks, fixedConfig1::engineSettings, fixedConfigs1, nextDwellChannel, PITCE, PITINTE, PITLD0, PITTF, PORTS, PORTS_BA, and queuedDwellOffsets.

{
    // clear flag
    PITTF = DWELL_ENABLE;

    // start dwelling asap
    PORTS_BA |= dwellStartMasks[nextDwellChannel];

    if(dwellQueueLength == 0){
        // turn off the int
        PITINTE &= DWELL_DISABLE;

        // disable channels
        PITCE &= DWELL_DISABLE;
    }else{
        // reduce queue length by one
        dwellQueueLength--;

        // increment channel counter to next channel
        if(nextDwellChannel < (fixedConfigs1.engineSettings.combustionEventsPerEngineCycle - 1)){
            nextDwellChannel++; // if not the last channel, increment
        }else{
            nextDwellChannel = 0; // if the last channel, reset to zero
        }

        // if the queue length after decrement is greater than 0 then we need to load the timer, if it is zero and we decremented, the timer was already loaded.
        if(dwellQueueLength > 0){
            if(dwellQueueLength > 8){ // TODO ???? why 8 ???? 12 or combustion events per... or ?
                //throw a nasty error of some sort for index out of range issue that should never occur (for now just light a LED)
                PORTS |= 0x20;
            }else{
                // load the timer if the index is good
                PITLD0 = queuedDwellOffsets[dwellQueueLength - 1];
            }
        }
    }

    // blink a led
    PORTS ^= 0x80;
}

void IgnitionFireISR

(

void

)

Ignition discharge control.

This function turns ignition pins off to discharge when required.

Author:

Fred Cooke

Todo:

TODO make this actually work.

Definition at line 123 of file ignitionISRs.c.

References engineSetting::combustionEventsPerEngineCycle, fixedConfig1::engineSettings, fixedConfigs1, IGNITION_DISABLE, IGNITION_ENABLE, ignitionMasks, ignitionQueueLength, nextIgnitionChannel, PITCE, PITINTE, PITLD0, PITTF, PORTS, PORTS_BA, and queuedIgnitionOffsets.

{
    // clear flag
    PITTF = IGNITION_ENABLE;

    // fire the coil asap
    PORTS_BA &= ignitionMasks[nextIgnitionChannel];

    if(ignitionQueueLength == 0){
        // turn off the int
        PITINTE &= IGNITION_DISABLE;

        // disable channels
        PITCE &= IGNITION_DISABLE ;
    }else{
        // reduce queue length by one
        ignitionQueueLength--;

        // increment channel counter to next channel
        if(nextIgnitionChannel < (fixedConfigs1.engineSettings.combustionEventsPerEngineCycle - 1)){
            nextIgnitionChannel++; // if not the last channel, increment
        }else{
            nextIgnitionChannel = 0; // if the last channel, reset to zero
        }

        // if the queue length after decrement is greater than 0 then we need to load the timer, if it is zero and we decremented, the timer was already loaded.
        if(ignitionQueueLength > 0){
            if(ignitionQueueLength > fixedConfigs1.engineSettings.combustionEventsPerEngineCycle){ // TODO as above!!!!!!!!!!
                //throw a nasty error of some sort for index out of range issue that should never occur (for now just light a LED)
                PORTS |= 0x10;
            }else{
                // load the timer if the index is good
                PITLD0 = queuedIgnitionOffsets[ignitionQueueLength - 1];
            }
        }
    }

    // blink a led
    PORTS ^= 0x40;
}