mirror of https://github.com/rusefi/rusefi.git
46 lines
1.3 KiB
C++
46 lines
1.3 KiB
C++
#include "pch.h"
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#include "port_microsecond_timer.h"
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#if EFI_PROD_CODE && HAL_USE_GPT
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void portSetHardwareSchedulerTimer(efitick_t nowNt, efitick_t setTimeNt) {
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int32_t deltaTimeUs = NT2US((int32_t)setTimeNt - (int32_t)nowNt);
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// If already set, reset the timer
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if (GPTDEVICE.state == GPT_ONESHOT) {
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gptStopTimerI(&GPTDEVICE);
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}
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if (GPTDEVICE.state != GPT_READY) {
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firmwareError(ObdCode::CUSTOM_HW_TIMER, "HW timer state %d", GPTDEVICE.state);
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return;
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}
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// Start the timer
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gptStartOneShotI(&GPTDEVICE, deltaTimeUs);
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}
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static void hwTimerCallback(GPTDriver*) {
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portMicrosecondTimerCallback();
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}
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/*
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* The specific 1MHz frequency is important here since 'setHardwareUsTimer' method takes microsecond parameter
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* For any arbitrary frequency to work we would need an additional layer of conversion.
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*/
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static constexpr GPTConfig gpt5cfg = { 1000000, /* 1 MHz timer clock.*/
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hwTimerCallback, /* Timer callback.*/
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0, 0 };
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void portInitMicrosecondTimer() {
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gptStart(&GPTDEVICE, &gpt5cfg);
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efiAssertVoid(ObdCode::CUSTOM_ERR_TIMER_STATE, GPTDEVICE.state == GPT_READY, "hw state");
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}
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#endif // EFI_PROD_CODE
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// This implementation just uses the generic port counter - this usually returns a count of CPU cycles since start
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uint32_t getTimeNowLowerNt() {
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return port_rt_get_counter_value();
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}
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