Detailed Description

This file is about producing real electrical signals which emulate trigger signal based on a known TriggerWaveform.

Historically this implementation was implemented based on PwmConfig which is maybe not the best way to implement it. (todo: why is not the best way?)

A newer implementation of pretty much the same thing is TriggerStimulatorHelper todo: one emulator should be enough! another one should be eliminated

Date: Mar 3, 2014

Author: Andrey Belomutskiy, (c) 2012-2020

Definition in file trigger_emulator_algo.cpp.

Functions
int	getPreviousIndex (const int currentIndex, const int size)

bool	needEvent (const int currentIndex, const MultiChannelStateSequence &mcss, int channelIndex)

	fail ("EFI_SHAFT_POSITION_INPUT required to have EFI_EMULATE_POSITION_SENSORS") TriggerEmulatorHelper

static float	getRpmMultiplier (operation_mode_e mode)

void	setTriggerEmulatorRPM (int rpm)

static void	updateTriggerWaveformIfNeeded (PwmConfig *state)

static void	emulatorApplyPinState (int stateIndex, PwmConfig *state)

static void	startSimulatedTriggerSignal ()

void	enableTriggerStimulator (bool incGlobalConfiguration)

void	enableExternalTriggerStimulator ()

void	disableTriggerStimulator ()

void	onConfigurationChangeRpmEmulatorCallback (engine_configuration_s *previousConfiguration)

void	initTriggerEmulator ()

void	startTriggerEmulatorPins ()

void	stopTriggerEmulatorPins ()

Variables
static OutputPin	emulatorOutputs [NUM_EMULATOR_CHANNELS][PWM_PHASE_MAX_WAVE_PER_PWM]

PwmConfig	triggerEmulatorSignals [NUM_EMULATOR_CHANNELS]

TriggerWaveform *	triggerEmulatorWaveforms [NUM_EMULATOR_CHANNELS]

static int	atTriggerVersions [NUM_EMULATOR_CHANNELS] = { 0 }

static TriggerEmulatorHelper	helper

static bool	hasStimPins = false

static bool	hasInitTriggerEmulator = false

Function Documentation

◆ disableTriggerStimulator()

void disableTriggerStimulator ( )

Definition at line 211 of file trigger_emulator_algo.cpp.

                                {
    engine->triggerCentral.directSelfStimulation = false;
    for (int channel = 0; channel < NUM_EMULATOR_CHANNELS; channel++) {
        triggerEmulatorSignals[channel].stop();
    }
    hasInitTriggerEmulator = false;
    incrementGlobalConfigurationVersion("disTrg");
}

Referenced by configureRusefiLuaHooks(), enableOrDisable(), and handleCommandX14().

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◆ emulatorApplyPinState()

static void emulatorApplyPinState	(	int	stateIndex,
		PwmConfig *	state
	)

static

this callback would invoke the input signal handlers directly

Definition at line 143 of file trigger_emulator_algo.cpp.

                                                                      {
    assertStackVoid("emulator", ObdCode::STACK_USAGE_MISC, EXPECTED_REMAINING_STACK);
    if (engine->triggerCentral.directSelfStimulation) {
        /**
         * this callback would invoke the input signal handlers directly
         */
        for (int channel = 0; channel < NUM_EMULATOR_CHANNELS; channel++) {
            if (state != &triggerEmulatorSignals[channel])
                continue;
            helper.handleEmulatorCallback(channel,
                *state->multiChannelStateSequence,
                stateIndex);
        }
    }
 
#if EFI_PROD_CODE
    // Only set pins if they're configured - no need to waste the cycles otherwise
    else if (hasStimPins) {
        applyPinState(stateIndex, state);
    }
#endif /* EFI_PROD_CODE */
}

Referenced by startSimulatedTriggerSignal().

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◆ enableExternalTriggerStimulator()

void enableExternalTriggerStimulator ( )

Definition at line 205 of file trigger_emulator_algo.cpp.

                                       {
    startSimulatedTriggerSignal();
    engine->triggerCentral.directSelfStimulation = false;
    incrementGlobalConfigurationVersion("extTrg");
}

Referenced by enableOrDisable(), and handleCommandX14().

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◆ enableTriggerStimulator()

void enableTriggerStimulator ( bool incGlobalConfiguration )

Definition at line 194 of file trigger_emulator_algo.cpp.

                                                          {
    startSimulatedTriggerSignal();
    engine->triggerCentral.directSelfStimulation = true;
    engine->rpmCalculator.Register();
    if (incGlobalConfiguration) {
        incrementGlobalConfigurationVersion("trgSim");
    }
}

Referenced by configureRusefiLuaHooks(), enableOrDisable(), and handleCommandX14().

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◆ fail()

fail ( "EFI_SHAFT_POSITION_INPUT required to have EFI_EMULATE_POSITION_SENSORS" )

this instance does not have a real physical pin - it's only used for engine sniffer

todo: we can kind of add real physical pin just for a very narrow case of troubleshooting but only if we ever need it :)

Engine idles around 20Hz and revs up to 140Hz, at 60/2 and 8 cylinders we have about 20Khz events If we can read buffer at 50Hz we want buffer to be about 400 elements.

Definition at line 34 of file trigger_emulator_algo.cpp.

41 {

42}

◆ getPreviousIndex()

int getPreviousIndex	(	const int	currentIndex,
		const int	size
	)

Definition at line 19 of file trigger_emulator_algo.cpp.

                                                             {
    return (currentIndex + size - 1) % size;
}

Referenced by TriggerStimulatorHelper::feedSimulatedEvent(), and needEvent().

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◆ getRpmMultiplier()

static float getRpmMultiplier ( operation_mode_e mode )

static

todo: why is this method NOT reciprocal to getCrankDivider?! todo: oh this method has only one usage? there must me another very similar method!

Definition at line 78 of file trigger_emulator_algo.cpp.

                                                     {
  switch (mode) {
    case FOUR_STROKE_SYMMETRICAL_CRANK_SENSOR:
    case FOUR_STROKE_THREE_TIMES_CRANK_SENSOR:
    case FOUR_STROKE_SIX_TIMES_CRANK_SENSOR:
      case FOUR_STROKE_TWELVE_TIMES_CRANK_SENSOR:
      case FOUR_STROKE_CRANK_SENSOR:
      case FOUR_STROKE_CAM_SENSOR:
      case OM_NONE:
        return getCrankDivider(mode) / 2.0;
      case TWO_STROKE:
          // unit test coverage still runs if the value below is changed to '2' not a great sign!
          // but HW CI insists that we have '1' here
          return 1;
    };
    criticalError("We should not have reach this line");
    return 1;
}

Referenced by setTriggerEmulatorRPM().

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◆ initTriggerEmulator()

void initTriggerEmulator ( )

Definition at line 228 of file trigger_emulator_algo.cpp.

                           {
    efiPrintf("Emulating %s", getEngine_type_e(engineConfiguration->engineType));
 
    startTriggerEmulatorPins();
 
    addConsoleActionI(CMD_RPM, setTriggerEmulatorRPM);
}

Referenced by initEngineEmulator().

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◆ needEvent()

bool needEvent	(	const int	currentIndex,
		const MultiChannelStateSequence &	mcss,
		int	channelIndex
	)

Definition at line 23 of file trigger_emulator_algo.cpp.

                                                                                                 {
    int prevIndex = getPreviousIndex(currentIndex, mcss.phaseCount);
    pin_state_t previousValue = mcss.getChannelState(channelIndex, /*phaseIndex*/prevIndex);
    pin_state_t currentValue = mcss.getChannelState(channelIndex, /*phaseIndex*/currentIndex);
 
    return previousValue != currentValue;
}

Referenced by TriggerStimulatorHelper::feedSimulatedEvent(), and TriggerEmulatorHelper::handleEmulatorCallback().

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◆ onConfigurationChangeRpmEmulatorCallback()

void onConfigurationChangeRpmEmulatorCallback ( engine_configuration_s * previousConfiguration )

Definition at line 220 of file trigger_emulator_algo.cpp.

                                                                                             {
    if (engineConfiguration->triggerSimulatorRpm ==
            previousConfiguration->triggerSimulatorRpm) {
        return;
    }
    setTriggerEmulatorRPM(engineConfiguration->triggerSimulatorRpm);
}

Referenced by incrementGlobalConfigurationVersion().

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◆ setTriggerEmulatorRPM()

void setTriggerEmulatorRPM ( int rpm )

All we need to do here is to change the periodMs togglePwmState() would see that the periodMs has changed and act accordingly

Definition at line 97 of file trigger_emulator_algo.cpp.

                                    {
  criticalAssertVoid(rpm >= 0 && rpm <= 30000, "emulator RPM out of range");
 
    engineConfiguration->triggerSimulatorRpm = rpm;
    /**
     * All we need to do here is to change the periodMs
     * togglePwmState() would see that the periodMs has changed and act accordingly
     */
    for (int channel = 0; channel < NUM_EMULATOR_CHANNELS; channel++) {
        float rPerSecond = NAN;
        if (rpm != 0) {
            // use 0.5 multiplier for cam
            float rpmM = (channel == 0) ? getRpmMultiplier(getEngineRotationState()->getOperationMode()) : 0.5f;
            rPerSecond = rpm * rpmM / 60.0; // per minute converted to per second
        }
        triggerEmulatorSignals[channel].setFrequency(rPerSecond);
    }
 
    engine->resetEngineSnifferIfInTestMode();
 
    efiPrintf("Emulating position sensor(s). RPM=%d", rpm);
}

Referenced by configureRusefiLuaHooks(), initTriggerEmulator(), onConfigurationChangeRpmEmulatorCallback(), setValue(), and startSimulatedTriggerSignal().

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◆ startSimulatedTriggerSignal()

static void startSimulatedTriggerSignal ( )

static

Definition at line 166 of file trigger_emulator_algo.cpp.

                                          {
    // No need to start more than once
    if (hasInitTriggerEmulator) {
        return;
    }
 
    // store the crank+cam waveforms
    triggerEmulatorWaveforms[0] = &engine->triggerCentral.triggerShape;
    for (int cami = 0; cami < CAMS_PER_BANK; cami++) {
        triggerEmulatorWaveforms[1 + cami] = &engine->triggerCentral.vvtShape[cami];
    }
 
    setTriggerEmulatorRPM(engineConfiguration->triggerSimulatorRpm);
 
    for (int channel = 0; channel < NUM_EMULATOR_CHANNELS; channel++) {
        TriggerWaveform *s = triggerEmulatorWaveforms[channel];
        if (s->getSize() == 0)
            continue;
        triggerEmulatorSignals[channel].weComplexInit(
            &engine->scheduler,
            &s->wave,
            updateTriggerWaveformIfNeeded, emulatorApplyPinState);
    }
    hasInitTriggerEmulator = true;
}

Referenced by enableExternalTriggerStimulator(), and enableTriggerStimulator().

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◆ startTriggerEmulatorPins()

void startTriggerEmulatorPins ( )

Definition at line 238 of file trigger_emulator_algo.cpp.

                                {
    hasStimPins = false;
    for (int channel = 0; channel < NUM_EMULATOR_CHANNELS; channel++) {
        for (size_t i = 0; i < efi::size(emulatorOutputs[channel]); i++) {
            triggerEmulatorSignals[channel].outputPins[i] = &emulatorOutputs[channel][i];
 
#if EFI_PROD_CODE
      brain_pin_e pin;
 
      pin_output_mode_e outputMode;
            if (channel == 0) {
            pin = engineConfiguration->triggerSimulatorPins[i];
            outputMode = engineConfiguration->triggerSimulatorPinModes[i];
        } else if (channel == 1 && i == 0) {
          pin = engineConfiguration->camSimulatorPin;
          outputMode = engineConfiguration->camSimulatorPinMode;
        } else {
              // todo: add pin configs for cam simulator channels
          continue;
        }
 
            // Only bother trying to set output pins if they're configured
            if (isBrainPinValid(pin)) {
                hasStimPins = true;
            }
 
            if (isConfigurationChanged(triggerSimulatorPins[i])) {
                triggerEmulatorSignals[channel].outputPins[i]->initPin("Trigger emulator", pin,
                    outputMode);
            }
#endif // EFI_PROD_CODE
        }
    }
}

Referenced by applyNewHardwareSettings(), and initTriggerEmulator().

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◆ stopTriggerEmulatorPins()

void stopTriggerEmulatorPins ( )

Definition at line 273 of file trigger_emulator_algo.cpp.

                               {
#if EFI_PROD_CODE
    for (int channel = 0; channel < NUM_EMULATOR_CHANNELS; channel++) {
        // todo: add pin configs for cam simulator channels
        if (channel != 0)
            continue;
        for (size_t i = 0; i < efi::size(emulatorOutputs[channel]); i++) {
            if (isConfigurationChanged(triggerSimulatorPins[i])) {
                triggerEmulatorSignals[channel].outputPins[i]->deInit();
            }
        }
    }
#endif // EFI_PROD_CODE
}

Referenced by stopHardware().

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◆ updateTriggerWaveformIfNeeded()

static void updateTriggerWaveformIfNeeded ( PwmConfig * state )

static

Definition at line 120 of file trigger_emulator_algo.cpp.

                                                            {
    for (int channel = 0; channel < NUM_EMULATOR_CHANNELS; channel++) {
        if (state != &triggerEmulatorSignals[channel])
            continue;
 
    if (atTriggerVersions[channel] < triggerEmulatorWaveforms[channel]->version) {
            atTriggerVersions[channel] = triggerEmulatorWaveforms[channel]->version;
            efiPrintf("Stimulator: updating trigger shape for ch%d: %d/%d %ld", channel, atTriggerVersions[channel],
                engine->getGlobalConfigurationVersion(), getTimeNowMs());
 
            copyPwmParameters(state, &triggerEmulatorWaveforms[channel]->wave);
            state->safe.periodNt = -1; // this would cause loop re-initialization
        }
    }
}