mirror of https://github.com/rusefi/rusefi-1.git
65 lines
1.6 KiB
C++
65 lines
1.6 KiB
C++
/**
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* @file vehicle_speed.cpp
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*
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* @date Dec 26, 2014
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* @author Andrey Belomutskiy, (c) 2012-2014
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*/
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#include "vehicle_speed.h"
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#if EFI_VEHICLE_SPEED || defined(__DOXYGEN__)
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#include "engine.h"
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#include "wave_analyzer_hw.h"
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#include "pin_repository.h"
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EXTERN_ENGINE
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;
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static Logging *logger;
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static WaveReaderHw vehicleSpeedInput;
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static uint64_t lastSignalTimeNt = 0;
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static uint64_t vssDiff = 0;
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static int vssCounter = 0;
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/**
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* @return vehicle speed, in kilometers per hour
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*/
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float getVehicleSpeed(void) {
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uint64_t nowNt = getTimeNowNt();
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if (nowNt - lastSignalTimeNt > US2NT(US_PER_SECOND_LL))
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return 0; // previous signal time is too long ago - we are stopped
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return engineConfiguration->vehicleSpeedCoef * US2NT(US_PER_SECOND_LL) / vssDiff;
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}
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static void vsAnaWidthCallback(void) {
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vssCounter++;
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uint64_t nowNt = getTimeNowNt();
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vssDiff = nowNt - lastSignalTimeNt;
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lastSignalTimeNt = nowNt;
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}
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static void speedInfo(void) {
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scheduleMsg(logger, "VSS@%s c=%f eventCounter=%d speed=%f",
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hwPortname(engineConfiguration->vehicleSpeedSensorInputPin),
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engineConfiguration->vehicleSpeedCoef,
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vssCounter,
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getVehicleSpeed());
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}
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void initVehicleSpeed(Logging *l) {
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logger = l;
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if (engineConfiguration->vehicleSpeedSensorInputPin == GPIO_UNASSIGNED)
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return;
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initWaveAnalyzerDriver(&vehicleSpeedInput, engineConfiguration->vehicleSpeedSensorInputPin);
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startInputDriver(&vehicleSpeedInput, true);
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registerCallback(&vehicleSpeedInput.widthListeners, (IntListener) vsAnaWidthCallback, NULL);
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addConsoleAction("speedinfo", speedInfo);
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}
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#endif /* EFI_VEHICLE_SPEED */
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