kopia lustrzana https://github.com/micropython/micropython
70 wiersze
2.1 KiB
C
70 wiersze
2.1 KiB
C
/*
|
|
* This file is part of the Micro Python project, http://micropython.org/
|
|
*
|
|
* The MIT License (MIT)
|
|
*
|
|
* Copyright (c) 2013, 2014 Damien P. George
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
* of this software and associated documentation files (the "Software"), to deal
|
|
* in the Software without restriction, including without limitation the rights
|
|
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
* copies of the Software, and to permit persons to whom the Software is
|
|
* furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included in
|
|
* all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
|
* THE SOFTWARE.
|
|
*/
|
|
|
|
#include <string.h>
|
|
|
|
#include STM32_HAL_H
|
|
|
|
#include "py/obj.h"
|
|
#include "rng.h"
|
|
|
|
#if MICROPY_HW_ENABLE_RNG
|
|
|
|
/// \moduleref pyb
|
|
|
|
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);
|
|
}
|
|
|
|
/// \function rng()
|
|
/// Return a 30-bit hardware generated random number.
|
|
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
|