mirror of https://github.com/rusefi/rusefi-1.git
64 lines
1.9 KiB
C++
64 lines
1.9 KiB
C++
/**
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* @file pwm_generator.cpp
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* @brief software PWM generator
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*
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* Software PWM implementation. Considering how low all frequencies are, we can totally afford a couple of float multiplications.
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* By generating PWM programmatically we are saving the timers for better purposes. This implementation also supports generating
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* synchronized waves as needed for example to emulate dual Hall-effect crankshaft position sensors.
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*
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*
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* @date May 28, 2013
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* @author Andrey Belomutskiy, (c) 2012-2014
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*
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*/
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#include "pwm_generator.h"
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#include "pin_repository.h"
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#include "datalogging.h"
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static Logging logger;
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/**
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* This method controls the actual hardware pins
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*/
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void applyPinState(PwmConfig *state, int stateIndex) {
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efiAssertVoid(state->multiWave.waveCount <= PWM_PHASE_MAX_WAVE_PER_PWM, "invalid waveCount");
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for (int waveIndex = 0; waveIndex < state->multiWave.waveCount; waveIndex++) {
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io_pin_e ioPin = state->outputPins[waveIndex];
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efiAssertVoid(stateIndex < PWM_PHASE_MAX_COUNT, "invalid stateIndex");
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int value = state->multiWave.waves[waveIndex].pinStates[stateIndex];
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setOutputPinValue(ioPin, value);
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}
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}
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void startSimplePwm(PwmConfig *state, const char *msg, io_pin_e ioPin,
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float frequency, float dutyCycle) {
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efiAssertVoid(dutyCycle >= 0 && dutyCycle <= 1, "dutyCycle");
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float switchTimes[] = { dutyCycle, 1 };
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int pinStates0[] = { 0, 1 };
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int *pinStates[1] = { pinStates0 };
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state->outputPins[0] = ioPin;
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state->periodUs = frequency2periodUs(frequency);
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weComplexInit(msg, state, 2, switchTimes, 1, pinStates, NULL, applyPinState);
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}
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void startSimplePwmExt(PwmConfig *state, const char *msg, brain_pin_e brainPin, io_pin_e ioPin,
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float frequency, float dutyCycle) {
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GPIO_TypeDef * port = getHwPort(brainPin);
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int pin = getHwPin(brainPin);
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outputPinRegister(msg, ioPin, port, pin);
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startSimplePwm(state, msg, ioPin, frequency, dutyCycle);
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}
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void initPwmGenerator(void) {
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initLogging(&logger, "PWM gen");
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}
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