43 lines
870 B
C
43 lines
870 B
C
#include <string.h>
|
|
|
|
#include "stm32f4xx_hal.h"
|
|
|
|
#include "misc.h"
|
|
#include "mpconfig.h"
|
|
#include "qstr.h"
|
|
#include "obj.h"
|
|
#include "rng.h"
|
|
|
|
#if MICROPY_HW_ENABLE_RNG
|
|
|
|
STATIC RNG_HandleTypeDef RNGHandle = {.Instance = NULL};
|
|
|
|
void rng_init0(void) {
|
|
// reset the RNG handle
|
|
memset(&RNGHandle, 0, sizeof(RNG_HandleTypeDef));
|
|
RNGHandle.Instance = RNG;
|
|
}
|
|
|
|
void rng_init(void) {
|
|
__RNG_CLK_ENABLE();
|
|
HAL_RNG_Init(&RNGHandle);
|
|
}
|
|
|
|
uint32_t rng_get(void) {
|
|
if (RNGHandle.State == HAL_RNG_STATE_RESET) {
|
|
rng_init();
|
|
}
|
|
return HAL_RNG_GetRandomNumber(&RNGHandle);
|
|
}
|
|
|
|
STATIC mp_obj_t pyb_rng_get(void) {
|
|
if (RNGHandle.State == HAL_RNG_STATE_RESET) {
|
|
rng_init();
|
|
}
|
|
return mp_obj_new_int(HAL_RNG_GetRandomNumber(&RNGHandle) >> 2);
|
|
}
|
|
|
|
MP_DEFINE_CONST_FUN_OBJ_0(pyb_rng_get_obj, pyb_rng_get);
|
|
|
|
#endif // MICROPY_HW_ENABLE_RNG
|