TachometerModule Class Reference

#include <tachometer.h>

Inheritance diagram for TachometerModule:

Collaboration diagram for TachometerModule:

Public Member Functions
void	init ()
void	onFastCallback () override
Public Member Functions inherited from EngineModule
virtual void	initNoConfiguration ()
virtual void	setDefaultConfiguration ()
virtual void	onConfigurationChange (engine_configuration_s const *)
virtual void	onSlowCallback ()
virtual void	onEngineStop ()
virtual void	onIgnitionStateChanged (bool)
virtual bool	needsDelayedShutoff ()
virtual void	onEnginePhase (float, efitick_t, angle_t, angle_t)

Private Attributes
bool	tachHasInit

Detailed Description

Definition at line 11 of file tachometer.h.

Member Function Documentation

init()

void TachometerModule::init

(

)

Definition at line 67 of file tachometer.cpp.

                           {
    tachHasInit = false;
 
    if (!isBrainPinValid(engineConfiguration->tachOutputPin)) {
        return;
    }
 
    startSimplePwm(&tachControl,
                "Tachometer",
                &engine->scheduler,
                &enginePins.tachOut,
                NAN, 0.1f);
 
    tachHasInit = true;
}

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onFastCallback()

void TachometerModule::onFastCallback ( )

overridevirtual

Reimplemented from EngineModule.

Definition at line 30 of file tachometer.cpp.

                                      {
    // Only do anything if tach enabled
    if (!tachHasInit) {
        return;
    }
 
    // How many tach pulse periods do we have?
    float periods = engineConfiguration->tachPulsePerRev;
 
    if (periods == 0 || periods > 10) {
        firmwareError(ObdCode::CUSTOM_ERR_6709, "Invalid tachometer pulse per rev: %.2f", periods);
        tachHasInit = false; // disable until nex fw init to avoid spamming the output
        return;
    }
 
    // What is the angle per tach output period?
    float cycleTimeMs = 60000.0f / Sensor::getOrZero(SensorType::Rpm);
    float periodTimeMs = cycleTimeMs / periods;
    tachFreq = 1000.0f / periodTimeMs;
 
    if (engineConfiguration->tachPulseDurationAsDutyCycle) {
        // Simple case - duty explicitly set
        duty = engineConfiguration->tachPulseDuractionMs;
    } else {
        // Constant high-time mode - compute the correct duty cycle
        duty = engineConfiguration->tachPulseDuractionMs / periodTimeMs;
    }
 
    // In case Freq is under 1Hz, we stop pwm to avoid warnings!
    if (tachFreq < 1) {
        tachFreq = NAN;
    }
 
    tachControl.setSimplePwmDutyCycle(duty);
    tachControl.setFrequency(tachFreq);
}

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Field Documentation

tachHasInit

bool TachometerModule::tachHasInit

private

Definition at line 16 of file tachometer.h.

Referenced by init(), and onFastCallback().

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The documentation for this class was generated from the following files:

• controllers/modules/tachometer/tachometer.h
• controllers/modules/tachometer/tachometer.cpp