circuitpython/ports/stm/common-hal/os/__init__.c

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/*
* This file is part of the MicroPython project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2017 Scott Shawcroft for Adafruit Industries
* Copyright (c) 2019 Lucian Copeland for Adafruit Industries
*
* 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 "genhdr/mpversion.h"
#include "py/mpconfig.h"
#include "py/objstr.h"
#include "py/objtuple.h"
#include "py/mperrno.h"
#include "py/runtime.h"
#include STM32_HAL_H
#include "peripherals/periph.h"
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STATIC const qstr os_uname_info_fields[] = {
MP_QSTR_sysname, MP_QSTR_nodename,
MP_QSTR_release, MP_QSTR_version, MP_QSTR_machine
};
STATIC const MP_DEFINE_STR_OBJ(os_uname_info_sysname_obj, STM32_SERIES_LOWER);
STATIC const MP_DEFINE_STR_OBJ(os_uname_info_nodename_obj, STM32_SERIES_LOWER);
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STATIC const MP_DEFINE_STR_OBJ(os_uname_info_release_obj, MICROPY_VERSION_STRING);
STATIC const MP_DEFINE_STR_OBJ(os_uname_info_version_obj, MICROPY_GIT_TAG " on " MICROPY_BUILD_DATE);
STATIC const MP_DEFINE_STR_OBJ(os_uname_info_machine_obj, MICROPY_HW_BOARD_NAME " with " MICROPY_HW_MCU_NAME);
STATIC MP_DEFINE_ATTRTUPLE(
os_uname_info_obj,
os_uname_info_fields,
5,
(mp_obj_t)&os_uname_info_sysname_obj,
(mp_obj_t)&os_uname_info_nodename_obj,
(mp_obj_t)&os_uname_info_release_obj,
(mp_obj_t)&os_uname_info_version_obj,
(mp_obj_t)&os_uname_info_machine_obj
);
mp_obj_t common_hal_os_uname(void) {
return (mp_obj_t)&os_uname_info_obj;
}
#define RNG_TIMEOUT 5
bool common_hal_os_urandom(uint8_t *buffer, uint32_t length) {
#if (HAS_TRNG)
//init the RNG
__HAL_RCC_RNG_CLK_ENABLE();
RNG_HandleTypeDef handle;
handle.Instance = RNG;
if (HAL_RNG_Init(&handle) != HAL_OK) mp_raise_ValueError(translate("RNG Init Error"));
//Assign bytes
for (uint i = 0; i < length; i++) {
uint32_t temp;
uint32_t start = HAL_GetTick();
//the HAL function has a timeout, but it isn't long enough, and isn't adjustable
while(!(__HAL_RNG_GET_FLAG(&handle,RNG_FLAG_DRDY)) && ((HAL_GetTick() - start) < RNG_TIMEOUT));
//
if (HAL_RNG_GenerateRandomNumber(&handle, &temp) != HAL_OK) {
mp_raise_ValueError(translate("Random number generation error"));
}
*buffer = (uint8_t)temp;
}
//shut down the peripheral
if (HAL_RNG_DeInit(&handle) != HAL_OK) mp_raise_ValueError(translate("RNG DeInit Error"));
__HAL_RCC_RNG_CLK_DISABLE();
return true;
#else
return false;
#endif
}