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#include <furi_hal_os.h>
#include <furi_hal_os_timer.h>
#include <furi_hal_power.h>
#include <stm32wbxx_ll_cortex.h>
#include <furi.h>
#define TAG "FuriHalOs"
#define FURI_HAL_OS_CLK_FREQUENCY 32768
#define FURI_HAL_OS_TICK_PER_SECOND 1024
#define FURI_HAL_OS_CLK_PER_TICK (FURI_HAL_OS_CLK_FREQUENCY / FURI_HAL_OS_TICK_PER_SECOND)
#define FURI_HAL_OS_TICK_PER_EPOCH (FURI_HAL_OS_TIMER_MAX / FURI_HAL_OS_CLK_PER_TICK)
#define FURI_HAL_OS_MAX_SLEEP (FURI_HAL_OS_TICK_PER_EPOCH - 1)
#ifdef FURI_HAL_OS_DEBUG
#include <stm32wbxx_ll_gpio.h>
#define LED_SLEEP_PORT GPIOA
#define LED_SLEEP_PIN LL_GPIO_PIN_7
#define LED_TICK_PORT GPIOA
#define LED_TICK_PIN LL_GPIO_PIN_6
#define LED_SECOND_PORT GPIOA
#define LED_SECOND_PIN LL_GPIO_PIN_4
void furi_hal_os_timer_callback() {
LL_GPIO_TogglePin(LED_SECOND_PORT, LED_SECOND_PIN);
}
#endif
extern void xPortSysTickHandler();
volatile uint32_t furi_hal_os_skew = 0;
void furi_hal_os_init() {
LL_DBGMCU_APB1_GRP2_FreezePeriph(LL_DBGMCU_APB1_GRP2_LPTIM2_STOP);
furi_hal_os_timer_init();
furi_hal_os_timer_continuous(FURI_HAL_OS_CLK_PER_TICK);
#ifdef FURI_HAL_OS_DEBUG
LL_GPIO_SetPinMode(LED_SLEEP_PORT, LED_SLEEP_PIN, LL_GPIO_MODE_OUTPUT);
LL_GPIO_SetPinMode(LED_TICK_PORT, LED_TICK_PIN, LL_GPIO_MODE_OUTPUT);
LL_GPIO_SetPinMode(LED_SECOND_PORT, LED_SECOND_PIN, LL_GPIO_MODE_OUTPUT);
osTimerId_t second_timer = osTimerNew(furi_hal_os_timer_callback, osTimerPeriodic, NULL, NULL);
osTimerStart(second_timer, FURI_HAL_OS_TICK_PER_SECOND);
#endif
FURI_LOG_I(TAG, "Init OK");
}
void LPTIM2_IRQHandler(void) {
// Autoreload
if(LL_LPTIM_IsActiveFlag_ARRM(FURI_HAL_OS_TIMER)) {
LL_LPTIM_ClearFLAG_ARRM(FURI_HAL_OS_TIMER);
if(xTaskGetSchedulerState() != taskSCHEDULER_NOT_STARTED) {
#ifdef FURI_HAL_OS_DEBUG
LL_GPIO_TogglePin(LED_TICK_PORT, LED_TICK_PIN);
#endif
xPortSysTickHandler();
}
}
if(LL_LPTIM_IsActiveFlag_CMPM(FURI_HAL_OS_TIMER)) {
LL_LPTIM_ClearFLAG_CMPM(FURI_HAL_OS_TIMER);
}
}
static inline uint32_t furi_hal_os_sleep(TickType_t expected_idle_ticks) {
// Stop ticks
furi_hal_os_timer_reset();
LL_SYSTICK_DisableIT();
// Start wakeup timer
furi_hal_os_timer_single(expected_idle_ticks * FURI_HAL_OS_CLK_PER_TICK);
#ifdef FURI_HAL_OS_DEBUG
LL_GPIO_ResetOutputPin(LED_SLEEP_PORT, LED_SLEEP_PIN);
#endif
// Go to sleep mode
furi_hal_power_sleep();
#ifdef FURI_HAL_OS_DEBUG
LL_GPIO_SetOutputPin(LED_SLEEP_PORT, LED_SLEEP_PIN);
#endif
// Calculate how much time we spent in the sleep
uint32_t after_cnt = furi_hal_os_timer_get_cnt() + furi_hal_os_skew;
uint32_t after_tick = after_cnt / FURI_HAL_OS_CLK_PER_TICK;
furi_hal_os_skew = after_cnt % FURI_HAL_OS_CLK_PER_TICK;
bool cmpm = LL_LPTIM_IsActiveFlag_CMPM(FURI_HAL_OS_TIMER);
bool arrm = LL_LPTIM_IsActiveFlag_ARRM(FURI_HAL_OS_TIMER);
if(cmpm && arrm) after_tick += expected_idle_ticks;
// Prepare tick timer for new round
furi_hal_os_timer_reset();
// Resume ticks
LL_SYSTICK_EnableIT();
furi_hal_os_timer_continuous(FURI_HAL_OS_CLK_PER_TICK);
return after_tick;
}
void vPortSuppressTicksAndSleep(TickType_t expected_idle_ticks) {
if(!furi_hal_power_sleep_available()) {
__WFI();
return;
}
// Limit mount of ticks to maximum that timer can count
if(expected_idle_ticks > FURI_HAL_OS_MAX_SLEEP) {
expected_idle_ticks = FURI_HAL_OS_MAX_SLEEP;
}
// Stop IRQ handling, no one should disturb us till we finish
__disable_irq();
// Confirm OS that sleep is still possible
if(eTaskConfirmSleepModeStatus() == eAbortSleep) {
__enable_irq();
return;
}
// Sleep and track how much ticks we spent sleeping
uint32_t completed_ticks = furi_hal_os_sleep(expected_idle_ticks);
// Notify system about time spent in sleep
if(completed_ticks > 0) {
if(completed_ticks > expected_idle_ticks) {
vTaskStepTick(expected_idle_ticks);
} else {
vTaskStepTick(completed_ticks);
}
}
// Reenable IRQ
__enable_irq();
}
void vApplicationStackOverflowHook(TaskHandle_t xTask, char* pcTaskName) {
furi_crash("StackOverflow");
}
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