rusefi
/
rusefi
mirror of https://github.com/rusefi/rusefi.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

Flex sensor decodes temperature too

This commit is contained in:
Matthew Kennedy 2023-09-18 14:43:59 -04:00 committed by rusefillc
parent 823fee6c45
commit 9d470c1758
1 changed files with 73 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

77
firmware/init/sensor/init_flex.cpp
View File

@ -1,19 +1,88 @@
#include "pch.h"
#include "init.h"
#include "frequency_sensor.h"
#include "functional_sensor.h"
#include "flex_sensor.h"
static FrequencySensor flexSensor(SensorType::FuelEthanolPercent, MS2NT(500));
#include "digital_input_exti.h"
static FunctionalSensor flexSensor(SensorType::FuelEthanolPercent, MS2NT(500));
static StoredValueSensor flexFuelTemp(SensorType::FuelTemperature, MS2NT(500));
static FlexConverter converter;
static Biquad flexTempFilter;
static Timer flexFreq, flexPulse;
static void flexCallback(efitick_t nowNt, bool value) {
if (value) {
float frequency = 1 / flexFreq.getElapsedSecondsAndReset(nowNt);
flexSensor.postRawValue(frequency, nowNt);
// Start timing pulse width on rising edge
flexPulse.reset(nowNt);
} else {
// End pulse timing on falling edge
float pulseWidthUs = flexPulse.getElapsedUs(nowNt);
if (pulseWidthUs < 900) {
flexFuelTemp.invalidate(UnexpectedCode::Low);
} else if (pulseWidthUs > 5100) {
flexFuelTemp.invalidate(UnexpectedCode::High);
} else {
// -40C = 1000us
// 125C = 5000us
float tempC = interpolateClamped(1000, -40, 5000, 125, pulseWidthUs);
tempC = flexTempFilter.filter(tempC);
flexFuelTemp.setValidValue(tempC, nowNt);
}
}
}
static Gpio flexPin = Gpio::Unassigned;
static void flexCallback(void*, efitick_t nowNt) {
#if EFI_PROD_CODE
flexCallback(nowNt, efiReadPin(flexPin));
#endif
}
// https://rusefi.com/forum/viewtopic.php?p=37452#p37452
void initFlexSensor() {
auto flexPin = engineConfiguration->flexSensorPin;
if (!isBrainPinValid(flexPin)) {
return;
}
// 0.01 means filter bandwidth of ~1hz with ~100hz sensor
flexSensor.initIfValid(engineConfiguration->flexSensorPin, converter, 0.01f);
flexTempFilter.configureLowpass(1, 0.01f);
#if EFI_PROD_CODE
efiExtiEnablePin("flex", flexPin,
PAL_EVENT_MODE_BOTH_EDGES,
flexCallback, nullptr);
#endif // EFI_PROD_CODE
flexSensor.Register();
// If an analog fuel temp sensor is configured, don't use the flex sensor for fuel temp
if (!isAdcChannelValid(engineConfiguration->fuelTempSensor.adcChannel)) {
flexFuelTemp.Register();
}
}
void deInitFlexSensor() {
flexSensor.deInit();
flexSensor.unregister();
flexFuelTemp.unregister();
if (!isBrainPinValid(flexPin)) {
return;
}
#if EFI_PROD_CODE
efiExtiDisablePin(flexPin);
#endif
flexPin = Gpio::Unassigned;
}