flipperzero-firmware/firmware/targets/f4/api-hal/api-hal-delay.c
あく 5d08b35b54
[FL-1009, FL-1118] Better initialization sequence and V8 hardware support (#406)
* Interrupt manager: add memory barriers.
* ISRs: remove TIM17 dead code.
* API HAL Delay: rename initialization routine and move to API-HAL
* Main: move FURI initialization to the start.
* API HAL GPIO: drop CC1101 shenanigans, COMP inversion for new boards.
* IButton: migrate Cyfral and Metakom to RFID comp routine, make it compatible with new boards.
* RFID: Better keyboard handling and shutdown routines
2021-04-11 16:47:36 +03:00

30 lines
756 B
C

#include "api-hal-delay.h"
#include <furi.h>
#include <cmsis_os2.h>
static uint32_t clk_per_microsecond;
void api_hal_delay_init(void) {
CoreDebug->DEMCR |= CoreDebug_DEMCR_TRCENA_Msk;
DWT->CTRL |= DWT_CTRL_CYCCNTENA_Msk;
DWT->CYCCNT = 0U;
clk_per_microsecond = SystemCoreClock / 1000000.0f;
}
void delay_us(float microseconds) {
uint32_t start = DWT->CYCCNT;
uint32_t time_ticks = microseconds * clk_per_microsecond;
while((DWT->CYCCNT - start) < time_ticks) {
};
}
// cannot be used in ISR
// TODO add delay_ISR variant
void delay(float milliseconds) {
uint32_t ticks = milliseconds / (1000.0f / osKernelGetTickFreq());
osStatus_t result = osDelay(ticks);
(void)result;
furi_assert(result == osOK);
}