mirror of https://github.com/rusefi/rusefi-1.git
63 lines
1.6 KiB
C++
63 lines
1.6 KiB
C++
#include "pch.h"
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#include "vr_pwm.h"
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static OutputPin pins[VR_THRESHOLD_COUNT];
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static SimplePwm pwms[VR_THRESHOLD_COUNT];
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// Default to 3.3v if not defined, most boards wire the VR threshold input directly to an MCU pin.
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#ifndef VR_SUPPLY_VOLTAGE
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#define VR_SUPPLY_VOLTAGE 3.3f
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#endif
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static void updateVrPwm(int rpm, size_t index) {
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auto& cfg = engineConfiguration->vrThreshold[index];
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if (!isBrainPinValid(cfg.pin)) {
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return;
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}
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float thresholdVoltage = interpolate2d(rpm, cfg.rpmBins, cfg.values);
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// 0v threshold voltage = 3.3v output from mcu = 100% duty
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// 2.5v threshold voltage = 0v output from mcu = 0% duty
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float thresholdInputVoltage = interpolateClamped(0, 3.3f, 2.5f, 0, thresholdVoltage);
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float duty = thresholdInputVoltage / VR_SUPPLY_VOLTAGE;
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pwms[index].setSimplePwmDutyCycle(duty);
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}
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void updateVrPwm() {
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auto rpm = Sensor::getOrZero(SensorType::Rpm);
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for (size_t i = 0; i < efi::size(engineConfiguration->vrThreshold); i++) {
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updateVrPwm(rpm, i);
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}
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}
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void initVrPwm() {
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for (size_t i = 0; i < efi::size(engineConfiguration->vrThreshold); i++) {
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auto& cfg = engineConfiguration->vrThreshold[i];
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if (!isBrainPinValid(cfg.pin)) {
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continue;
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}
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startSimplePwmHard(&pwms[i], "VR PWM",
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&engine->executor,
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cfg.pin,
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&pins[i],
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10000, // it's guaranteed to be hardware PWM, the faster the PWM, the less noise makes it through
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0
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);
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}
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}
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void setDefaultVrThresholds() {
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for (int i = 0;i<VR_THRESHOLD_COUNT;i++) {
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setLinearCurve(engineConfiguration->vrThreshold[i].rpmBins, 600, 7000, 100);
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setLinearCurve(engineConfiguration->vrThreshold[i].values, 0.6, 1.2, 0.1);
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}
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}
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