mirror of
https://github.com/DarkFlippers/unleashed-firmware
synced 2024-11-27 23:10:22 +00:00
64 lines
2.2 KiB
C
64 lines
2.2 KiB
C
#pragma once
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#include <stm32wbxx_ll_lptim.h>
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#include <stm32wbxx_ll_bus.h>
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#include <stdint.h>
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// Timer used for system ticks
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#define FURI_HAL_OS_TIMER_MAX 0xFFFF
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#define FURI_HAL_OS_TIMER_REG_LOAD_DLY 0x1
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#define FURI_HAL_OS_TIMER LPTIM2
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#define FURI_HAL_OS_TIMER_IRQ LPTIM2_IRQn
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static inline void furi_hal_os_timer_init() {
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// Configure clock source
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LL_RCC_SetLPTIMClockSource(LL_RCC_LPTIM2_CLKSOURCE_LSE);
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LL_APB1_GRP2_EnableClock(LL_APB1_GRP2_PERIPH_LPTIM2);
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// Set interrupt priority and enable them
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NVIC_SetPriority(FURI_HAL_OS_TIMER_IRQ, NVIC_EncodePriority(NVIC_GetPriorityGrouping(), 15, 0));
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NVIC_EnableIRQ(FURI_HAL_OS_TIMER_IRQ);
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}
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static inline void furi_hal_os_timer_continuous(uint32_t count) {
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// Enable timer
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LL_LPTIM_Enable(FURI_HAL_OS_TIMER);
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while(!LL_LPTIM_IsEnabled(FURI_HAL_OS_TIMER));
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// Enable rutoreload match interrupt
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LL_LPTIM_EnableIT_ARRM(FURI_HAL_OS_TIMER);
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// Set autoreload and start counter
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LL_LPTIM_SetAutoReload(FURI_HAL_OS_TIMER, count);
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LL_LPTIM_StartCounter(FURI_HAL_OS_TIMER, LL_LPTIM_OPERATING_MODE_CONTINUOUS);
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}
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static inline void furi_hal_os_timer_single(uint32_t count) {
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// Enable timer
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LL_LPTIM_Enable(FURI_HAL_OS_TIMER);
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while(!LL_LPTIM_IsEnabled(FURI_HAL_OS_TIMER));
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// Enable compare match interrupt
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LL_LPTIM_EnableIT_CMPM(FURI_HAL_OS_TIMER);
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// Set compare, autoreload and start counter
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// Include some marging to workaround ARRM behaviour
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LL_LPTIM_SetCompare(FURI_HAL_OS_TIMER, count-3);
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LL_LPTIM_SetAutoReload(FURI_HAL_OS_TIMER, count);
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LL_LPTIM_StartCounter(FURI_HAL_OS_TIMER, LL_LPTIM_OPERATING_MODE_ONESHOT);
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}
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static inline void furi_hal_os_timer_reset() {
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// Hard reset timer
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// THE ONLY RELIABLEWAY to stop it according to errata
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LL_LPTIM_DeInit(FURI_HAL_OS_TIMER);
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}
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static inline uint32_t furi_hal_os_timer_get_cnt() {
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uint32_t counter = LL_LPTIM_GetCounter(FURI_HAL_OS_TIMER);
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uint32_t counter_shadow = LL_LPTIM_GetCounter(FURI_HAL_OS_TIMER);
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while(counter != counter_shadow) {
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counter = counter_shadow;
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counter_shadow = LL_LPTIM_GetCounter(FURI_HAL_OS_TIMER);
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}
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return counter;
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}
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