ignition_controller.cpp

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#include "pch.h"
 
bool isIgnVoltage() {
#if EFI_PROD_CODE
    // Digital pin has priority over analog inputs
    if (isBrainPinValid(engineConfiguration->ignitionKeyDigitalPin)) {
        return efiReadPin(engineConfiguration->ignitionKeyDigitalPin, engineConfiguration->ignitionKeyDigitalPinMode);
    }
#endif
 
    float ignVoltage = 0;
    if (Sensor::hasSensor(SensorType::IgnKeyVoltage)) {
        // If we have separate ignition sensing input
        ignVoltage = Sensor::getOrZero(SensorType::IgnKeyVoltage);
    } else {
        // No, we assume that ignition is ON while we are powered with resonable voltage
        ignVoltage = Sensor::getOrZero(SensorType::BatteryVoltage);
    }
 
    return (ignVoltage > 6.0f);
}
 
void IgnitionController::onSlowCallback() {
    // default to 0 if failed sensor to prevent accidental ign-on if battery
    // input misconfigured (or the ADC hasn't started yet)
    auto hasIgnVoltage = isIgnVoltage();
 
    if (hasIgnVoltage) {
        m_timeSinceIgnVoltage.reset();
    }
 
    if (hasIgnVoltage == m_lastState) {
        // nothing to do, states match
        return;
    }
 
    // Ignore low voltage transients - we may see this at the start of cranking
    // and we don't want to
    if (!hasIgnVoltage && secondsSinceIgnVoltage() < 0.2f) {
        return;
    }
 
    // Store state and notify other modules of the change
    m_lastState = hasIgnVoltage;
    engine->engineModules.apply_all([&](auto& m) { m.onIgnitionStateChanged(hasIgnVoltage); });
}