Add us delay

crypto-aes
Hierophect 3 years ago
parent 1006c5600c
commit 1a7060af25

@ -42,14 +42,30 @@
// This routine should work even when interrupts are disabled. Used by OneWire
// for precise timing.
void common_hal_mcu_delay_us(uint32_t delay) {
//TODO: implement equivalent of mp_hal_delay_us(delay);
//this is fairly annoying in the STM32 HAL
// sys freq is always a multiple of 2MHz, so division here won't lose precision
const uint32_t ucount = HAL_RCC_GetSysClockFreq() / 2000000 * delay / 2;
for (uint32_t count = 0; ++count <= ucount;) {
}
void common_hal_mcu_disable_interrupts() {
volatile uint32_t nesting_count = 0;
void common_hal_mcu_disable_interrupts(void) {
__disable_irq();
__DMB();
nesting_count++;
}
void common_hal_mcu_enable_interrupts() {
void common_hal_mcu_enable_interrupts(void) {
if (nesting_count == 0) {
// This is very very bad because it means there was mismatched disable/enables so we
// "HardFault".
HardFault_Handler();
}
nesting_count--;
if (nesting_count > 0) {
return;
}
__DMB();
__enable_irq();
}
void common_hal_mcu_on_next_reset(mcu_runmode_t runmode) {
@ -58,7 +74,7 @@ void common_hal_mcu_on_next_reset(mcu_runmode_t runmode) {
}
void common_hal_mcu_reset(void) {
filesystem_flush();
filesystem_flush(); //TODO: implement as part of flash improvements
NVIC_SystemReset();
}

@ -33,8 +33,6 @@
#include "lib/utils/interrupt_char.h"
#include "py/mpconfig.h"
//extern nrfx_uarte_t serial_instance;
extern volatile uint64_t ticks_ms;
#define mp_hal_ticks_ms() ((mp_uint_t) ticks_ms)

Loading…
Cancel
Save