mirror of https://github.com/rusefi/rusefi.git
112 lines
2.9 KiB
C++
112 lines
2.9 KiB
C++
#include "pch.h"
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#include "init.h"
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#include "functional_sensor.h"
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#include "flex_sensor.h"
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#include "digital_input_exti.h"
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static FunctionalSensor flexSensor(SensorType::FuelEthanolPercent, MS2NT(500));
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static StoredValueSensor flexFuelTemp(SensorType::FuelTemperature, MS2NT(500));
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static FlexConverter converter;
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static Biquad flexTempFilter;
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static Timer flexFreq, flexPulse;
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static int flexCallbackCounter = 0;
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static int lowFlexCallbackCounter = 0;
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static float frequency;
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static float pulseWidthUs;
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static efitick_t latestCallbackTime;
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static void flexCallback(efitick_t nowNt, bool value) {
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latestCallbackTime = nowNt;
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flexCallbackCounter++;
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if (value) {
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frequency = 1 / flexFreq.getElapsedSecondsAndReset(nowNt);
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flexSensor.postRawValue(frequency, nowNt);
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// Start timing pulse width on rising edge
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flexPulse.reset(nowNt);
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} else {
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lowFlexCallbackCounter++;
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// End pulse timing on falling edge
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pulseWidthUs = flexPulse.getElapsedUs(nowNt);
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if (pulseWidthUs < 900) {
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flexFuelTemp.invalidate(UnexpectedCode::Low);
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warning(ObdCode::CUSTOM_OBD_6003, "flex low %f", pulseWidthUs);
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} else if (pulseWidthUs > 5100) {
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flexFuelTemp.invalidate(UnexpectedCode::High);
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warning(ObdCode::CUSTOM_OBD_6004, "flex high %f", pulseWidthUs);
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} else {
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// -40C = 1000us
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// 125C = 5000us
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float tempC = interpolateClamped(1000, -40, 5000, 125, pulseWidthUs);
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tempC = flexTempFilter.filter(tempC);
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flexFuelTemp.setValidValue(tempC, nowNt);
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}
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}
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}
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static Gpio flexPin = Gpio::Unassigned;
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static void flexExtiCallback(void*, efitick_t nowNt) {
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#if EFI_PROD_CODE
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flexCallback(nowNt, efiReadPin(flexPin));
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#endif
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}
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// https://rusefi.com/forum/viewtopic.php?p=37452#p37452
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void initFlexSensor(bool isFirstTime) {
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flexPin = engineConfiguration->flexSensorPin;
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if (!isBrainPinValid(flexPin)) {
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return;
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}
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// 0.01 means filter bandwidth of ~1hz with ~100hz sensor
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flexTempFilter.configureLowpass(1, 0.01f);
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flexSensor.setFunction(converter);
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#if EFI_PROD_CODE
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efiExtiEnablePin("flex", flexPin,
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PAL_EVENT_MODE_BOTH_EDGES,
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flexExtiCallback, nullptr);
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if (isFirstTime) {
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addConsoleAction("flexinfo", []() {
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efiPrintf("flex counter %d", flexCallbackCounter);
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efiPrintf("lowFlexCallbackCounter counter %d", lowFlexCallbackCounter);
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efiPrintf("flex freq %f", frequency);
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efiPrintf("pulseWidthUs %f", pulseWidthUs);
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efiPrintf("latestCallbackTime %d", latestCallbackTime);
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});
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}
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#endif // EFI_PROD_CODE
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flexSensor.Register();
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// If an analog fuel temp sensor is configured, don't use the flex sensor for fuel temp
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if (!isAdcChannelValid(engineConfiguration->fuelTempSensor.adcChannel)) {
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flexFuelTemp.Register();
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}
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}
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void deInitFlexSensor() {
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flexSensor.unregister();
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flexFuelTemp.unregister();
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if (!isBrainPinValid(flexPin)) {
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return;
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}
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#if EFI_PROD_CODE
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efiExtiDisablePin(flexPin);
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#endif
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flexPin = Gpio::Unassigned;
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}
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