start_stop.cpp

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#include "pch.h"
 
/**
 * See test_start_stop.cpp
 */
 
#include "start_stop.h"
#include "ignition_controller.h"
 
#if EFI_SHAFT_POSITION_INPUT
void initStartStopButton() {
    /* startCrankingDuration is efitimesec_t, so we need to multiply it by 1000 to get milliseconds*/
    engine->startStopState.startStopButtonDebounce.init((engineConfiguration->startCrankingDuration*1000),
      engineConfiguration->startStopButtonPin,
      engineConfiguration->startStopButtonMode,
      engineConfiguration->startRequestPinInverted);
}
 
void doStartCranking() {
        bool wasStarterEngaged = enginePins.starterControl.getAndSet(1);
        if (!wasStarterEngaged) {
            engine->startStopState.startStopStateLastPush.reset();
            efiPrintf("Let's crank this engine for up to %d seconds via %s!",
                    engineConfiguration->startCrankingDuration,
                    hwPortname(engineConfiguration->starterControlPin));
        }
}
 
static void onStartStopButtonToggle() {
    engine->engineState.startStopStateToggleCounter++;
 
    if (engine->rpmCalculator.isStopped()) {
      doStartCranking();
    } else if (engine->rpmCalculator.isRunning()) {
        doScheduleStopEngine(StopRequestedReason::StartButton);
    }
}
 
static void disengageStarterIfNeeded() {
    if (engine->rpmCalculator.isRunning()) {
        // turn starter off once engine is now running!
        bool wasStarterEngaged = enginePins.starterControl.getAndSet(0);
        if (wasStarterEngaged) {
            efiPrintf("Engine runs we can disengage the starter");
        }
    } else {
        if (engine->startStopState.startStopStateLastPush.hasElapsedSec(engineConfiguration->startCrankingDuration)) {
            bool wasStarterEngaged = enginePins.starterControl.getAndSet(0);
            if (wasStarterEngaged) {
                efiPrintf("Cranking timeout %d seconds", engineConfiguration->startCrankingDuration);
            }
        }
    }
}
 
PUBLIC_API_WEAK bool isCrankingSuppressed() {
  return false;
}
 
void slowStartStopButtonCallback() {
  if (!isIgnVoltage()) {
    // nothing to crank if we are powered only via USB
    engine->startStopState.timeSinceIgnitionPower.reset();
    return;
  } else if (engine->startStopState.isFirstTime) {
    // initialize when first time with proper power
    engine->startStopState.timeSinceIgnitionPower.reset();
    engine->startStopState.isFirstTime = false;
  }
 
    if (engine->startStopState.timeSinceIgnitionPower.getElapsedUs() < MS2US(engineConfiguration->startButtonSuppressOnStartUpMs)) {
        // where are odd cases of start button combined with ECU power source button we do not want to crank right on start
        return;
    }
 
  if (engine->rpmCalculator.isStopped()) {
    if (engineConfiguration->requireFootOnBrakeToCrank && !engine->brakePedalSwitchedState) {
      return;
    }
 
    if (isCrankingSuppressed()) {
      return;
    }
  }
 
    bool startStopState = engine->startStopState.startStopButtonDebounce.readPinEvent();
 
    if (startStopState && !engine->engineState.startStopState) {
        // we are here on transition from 0 to 1
        onStartStopButtonToggle();
    }
    // todo: we shall extract start_stop.txt from engine_state.txt
    engine->engineState.startStopState = startStopState;
    engine->engineState.startStopPhysicalState = engine->startStopState.startStopButtonDebounce.getPhysicalState();
 
    bool isStarterEngaged = enginePins.starterControl.getLogicValue();
 
    if (isStarterEngaged) {
        disengageStarterIfNeeded();
    }
}
#endif // EFI_SHAFT_POSITION_INPUT