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"Fixed baro correction" option using the initial MAP pressure (#529) 

* Fixed baro correction option using the initial MAP pressure

* code style
This commit is contained in:
andreika-git 2018-01-03 14:47:44 +02:00 committed by rusefi
parent fc3050de22
commit 286c3c9751
1 changed files with 36 additions and 1 deletions
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37
firmware/controllers/sensors/map.cpp
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@ -29,6 +29,9 @@ static efitick_t prevWidthTimeNt = 0;
static float mapFreq = 0;
// See 'useFixedBaroCorrFromMap'
static float storedInitialBaroPressure = NAN;
/**
* @brief MAP value decoded for a 1.83 Honda sensor
* -6.64kPa at zero volts
@ -106,6 +109,18 @@ float validateMap(float mapKPa DECLARE_ENGINE_PARAMETER_SUFFIX) {
return mapKPa;
}
/**
* This function checks if Baro/MAP sensor value is inside of expected range
* @return unchanged mapKPa parameter or NaN
*/
float validateBaroMap(float mapKPa DECLARE_ENGINE_PARAMETER_SUFFIX) {
const float atmoPressure = 100.0f;
const float atmoPressureRange = 15.0f; // 85..115
if (cisnan(mapKPa) || absF(mapKPa - atmoPressure) > atmoPressureRange)
return NAN;
return mapKPa;
}
/**
* @brief MAP value decoded according to current settings
* @returns kPa value
@ -134,8 +149,12 @@ float getRawMap(DECLARE_ENGINE_PARAMETER_SIGNATURE) {
return getMapByVoltage(voltage PASS_ENGINE_PARAMETER_SUFFIX);
}
/**
* Returns true if a real Baro sensor is present.
* Also if 'useFixedBaroCorrFromMap' option is enabled, and we have the initial pressure value stored and passed validation.
*/
bool hasBaroSensor(DECLARE_ENGINE_PARAMETER_SIGNATURE) {
return engineConfiguration->baroSensor.hwChannel != EFI_ADC_NONE;
return engineConfiguration->baroSensor.hwChannel != EFI_ADC_NONE || !cisnan(storedInitialBaroPressure);
}
bool hasMapSensor(DECLARE_ENGINE_PARAMETER_SIGNATURE) {
@ -143,6 +162,9 @@ bool hasMapSensor(DECLARE_ENGINE_PARAMETER_SIGNATURE) {
}
float getBaroPressure(DECLARE_ENGINE_PARAMETER_SIGNATURE) {
// Override the real Baro sensor with the stored initial MAP value, if the option is set.
if (CONFIG(useFixedBaroCorrFromMap))
return storedInitialBaroPressure;
float voltage = getVoltageDivided("baro", engineConfiguration->baroSensor.hwChannel);
return decodePressure(voltage, &engineConfiguration->baroSensor PASS_ENGINE_PARAMETER_SUFFIX);
}
@ -244,6 +266,19 @@ void initMapDecoder(Logging *sharedLogger DECLARE_ENGINE_PARAMETER_SUFFIX) {
digitalMapInput->widthListeners.registerCallback((VoidInt) digitalMapWidthCallback, NULL);
}
if (CONFIG(useFixedBaroCorrFromMap)) {
// Read initial MAP sensor value and store it for Baro correction.
storedInitialBaroPressure = getRawMap(PASS_ENGINE_PARAMETER_SIGNATURE);
scheduleMsg(logger, "Get initial baro MAP pressure = %fkPa", storedInitialBaroPressure);
// validate if it's within a reasonable range (the engine should not be spinning etc.)
storedInitialBaroPressure = validateBaroMap(storedInitialBaroPressure);
if (!cisnan(storedInitialBaroPressure)) {
scheduleMsg(logger, "Using this fixed MAP pressure to override the baro correction!");
} else {
scheduleMsg(logger, "The baro pressure is invalid. The fixed baro correction will be disabled!");
}
}
addConsoleAction("mapinfo", printMAPInfo);
#endif
}