mirror of https://github.com/rusefi/rusefi.git
67 lines
1.5 KiB
C++
67 lines
1.5 KiB
C++
/**
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* @file servo.cpp
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*
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* http://rusefi.com/wiki/index.php?title=Hardware:Servo_motor
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*
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* SG90 pinout:
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* brown GND
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* red VCC
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* orange PWM signal
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*
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* @date Jan 3, 2015
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* @author Andrey Belomutskiy, (c) 2012-2020
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*/
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#include "pch.h"
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#if EFI_SERVO || EFI_SIMULATOR
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#include "servo.h"
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// This thread calls scheduleForLater which eventually could trip the main trigger callback
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// if self stimulation (heh) is enabled, which uses a TON of stack space.
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// So this stack has to be pretty big, unfortunately.
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THD_WORKING_AREA(servoThreadStack, UTILITY_THREAD_STACK_SIZE * 3);
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static OutputPin pins[SERVO_COUNT];
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static scheduling_s servoTurnSignalOff;
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// todo: extract common 'pin off' callback?
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static void servoTachPinLow(OutputPin *pin) {
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pin->setValue(false);
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}
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static msg_t seThread(void *arg) {
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(void)arg;
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chRegSetThreadName("servo");
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while (true) {
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OutputPin *pin = &pins[0];
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pin->setValue(1);
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percent_t position = (currentTimeMillis() / 5) % 200;
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if (position > 100)
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position = 200 - position;
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float durationMs = 0 + position * 0.02f;
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engine->executor.scheduleForLater(&servoTurnSignalOff, (int)MS2US(durationMs), { &servoTachPinLow, pin });
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chThdSleepMilliseconds(19);
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}
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return 0;
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}
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void initServo(void) {
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for (int i = 0; i < SERVO_COUNT; i ++) {
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brain_pin_e p = engineConfiguration->servoOutputPins[i];
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pins[i].initPin("servo", p);
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}
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chThdCreateStatic(servoThreadStack, sizeof(servoThreadStack), PRIO_SERVO, (tfunc_t)(void*) seThread, NULL);
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}
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#endif /* EFI_SERVO */
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