Subaru-36-2-2-2.c File Reference

Subaru 36 minus 2 2 2. More...

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

Include dependency graph for Subaru-36-2-2-2.c:

Go to the source code of this file.

Functions
void	PrimaryRPMISR (void)
void	SecondaryRPMISR (void)
	Use the rising and falling edges...................

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Detailed Description

Subaru 36 minus 2 2 2.

Note:

Pseudo code that does not compile with zero warnings and errors MUST be commented out.

Todo:

TODO This file contains SFA but [anon] is going to fill it up with

TODO wonderful goodness very soon ;-)

Author:

Who Ever

Definition in file Subaru-36-2-2-2.c.

---

Function Documentation

void PrimaryRPMISR

(

void

)

Primary RPM ISR

Todo:

TODO Docs here!

Todo:

TODO possibly add code to make sure we are in divide mode, if not error out

Todo:

TODO fill in or remove the else

Todo:

TODO discard narrow ones! test for tooth width and tooth period the width should be based on how the hardware is setup. IE the LM1815 is adjusted to have a pulse output of a particular width. This noise filter should be matched to that width as should the hardware filter.

Definition at line 51 of file Subaru-36-2-2-2.c.

References fixedConfig1::coreSettingsA, Counters, fixedConfigs1, ISRLatencyVars, PORTJ, PRIMARY_POLARITY, ISRLatencyVar::primaryInputLatency, RuntimeVar::primaryInputLeadingRuntime, RuntimeVar::primaryInputTrailingRuntime, primaryPulsesPerSecondaryPulse, Counter::primaryTeethSeen, PTIT, RuntimeVars, TC0, TCNT, TFLG, TFLGOF, timerExtensionClock, and LongTime::timeShorts.

{
    /* Clear the interrupt flag for this input compare channel */
    TFLG = 0x01;

    /* Save all relevant available data here */
    unsigned short codeStartTimeStamp = TCNT;       /* Save the current timer count */
    unsigned short edgeTimeStamp = TC0;             /* Save the edge time stamp */
    unsigned char PTITCurrentState = PTIT;          /* Save the values on port T regardless of the state of DDRT */
//  unsigned short PORTS_BACurrentState = PORTS_BA; /* Save ignition output state */

    /* Calculate the latency in ticks */
    ISRLatencyVars.primaryInputLatency = codeStartTimeStamp - edgeTimeStamp;

    // TODO discard narrow ones! test for tooth width and tooth period

    /* Set up edges as per config */
    unsigned char risingEdge;
    if(fixedConfigs1.coreSettingsA & PRIMARY_POLARITY){
        risingEdge = PTITCurrentState & 0x01;
    }else{
        risingEdge = !(PTITCurrentState & 0x01);
    }

    if(risingEdge){
        /* Echo input condition on J7 */
        PORTJ |= 0x80;

        // increment crank pulses TODO this needs to be wrapped in tooth period and width checking
        primaryPulsesPerSecondaryPulse++;

        LongTime timeStamp;

        /* Install the low word */
        timeStamp.timeShorts[1] = edgeTimeStamp;
        /* Find out what our timer value means and put it in the high word */
        if(TFLGOF && !(edgeTimeStamp & 0x8000)){ /* see 10.3.5 paragraph 4 of 68hc11 ref manual for details */
            timeStamp.timeShorts[0] = timerExtensionClock + 1;
        }else{
            timeStamp.timeShorts[0] = timerExtensionClock;
        }
        RuntimeVars.primaryInputLeadingRuntime = TCNT - codeStartTimeStamp;
    }else{
        PORTJ &= 0x7F;
        RuntimeVars.primaryInputTrailingRuntime = TCNT - codeStartTimeStamp;
    }

    Counters.primaryTeethSeen++;
}

void SecondaryRPMISR

(

void

)

Use the rising and falling edges...................

Secondary RPM ISR

Todo:

TODO Docs here!

Todo:

TODO fill in or remove the else

Todo:

TODO discard narrow ones! test for tooth width and tooth period the width should be based on how the hardware is setup. IE the LM1815 is adjusted to have a pulse output of a particular width. This noise filter should be matched to that width as should the hardware filter.

Todo:

TODO discard narrow ones! test for tooth width and tooth period the width should be based on how the hardware is setup. IE the LM1815 is adjusted to have a pulse output of a particular width. This noise filter should be matched to that width as should the hardware filter.

Definition at line 106 of file Subaru-36-2-2-2.c.

References fixedConfig1::coreSettingsA, Counters, fixedConfigs1, ISRLatencyVars, PORTJ, PTIT, RuntimeVars, SECONDARY_POLARITY, ISRLatencyVar::secondaryInputLatency, RuntimeVar::secondaryInputLeadingRuntime, RuntimeVar::secondaryInputTrailingRuntime, Counter::secondaryTeethSeen, TC1, TCNT, TFLG, TFLGOF, timerExtensionClock, and LongTime::timeShorts.

{
    /* Clear the interrupt flag for this input compare channel */
    TFLG = 0x02;

    /* Save all relevant available data here */
    unsigned short codeStartTimeStamp = TCNT;       /* Save the current timer count */
    unsigned short edgeTimeStamp = TC1;             /* Save the timestamp */
    unsigned char PTITCurrentState = PTIT;          /* Save the values on port T regardless of the state of DDRT */
//  unsigned short PORTS_BACurrentState = PORTS_BA; /* Save ignition output state */

    /* Calculate the latency in ticks */
    ISRLatencyVars.secondaryInputLatency = codeStartTimeStamp - edgeTimeStamp;

    // TODO discard narrow ones! test for tooth width and tooth period

    /* Set up edges as per config */
    unsigned char risingEdge;
    if(fixedConfigs1.coreSettingsA & SECONDARY_POLARITY){
        risingEdge = PTITCurrentState & 0x02;
    }else{
        risingEdge = !(PTITCurrentState & 0x02);
    }

    if(risingEdge){
        // echo input condition
        PORTJ |= 0x40;

        LongTime timeStamp;

        /* Install the low word */
        timeStamp.timeShorts[1] = edgeTimeStamp;
        /* Find out what our timer value means and put it in the high word */
        if(TFLGOF && !(edgeTimeStamp & 0x8000)){ /* see 10.3.5 paragraph 4 of 68hc11 ref manual for details */
            timeStamp.timeShorts[0] = timerExtensionClock + 1;
        }else{
            timeStamp.timeShorts[0] = timerExtensionClock;
        }

        RuntimeVars.secondaryInputLeadingRuntime = TCNT - codeStartTimeStamp;
    }else{
        PORTJ &= 0xBF;
        RuntimeVars.secondaryInputTrailingRuntime = TCNT - codeStartTimeStamp;
    }

    Counters.secondaryTeethSeen++;
}