95 lines
3.4 KiB
C
95 lines
3.4 KiB
C
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/*
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* This file is part of the MicroPython project, http://micropython.org/
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2017 Scott Shawcroft for Adafruit Industries
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* Copyright (c) 2019 Lucian Copeland for Adafruit Industries
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "genhdr/mpversion.h"
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#include "py/mpconfig.h"
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#include "py/objstr.h"
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#include "py/objtuple.h"
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#include "py/mperrno.h"
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#include "py/runtime.h"
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#include "stm32f4xx_hal.h"
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#include "stm32f4/periph.h"
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STATIC const qstr os_uname_info_fields[] = {
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MP_QSTR_sysname, MP_QSTR_nodename,
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MP_QSTR_release, MP_QSTR_version, MP_QSTR_machine
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};
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STATIC const MP_DEFINE_STR_OBJ(os_uname_info_sysname_obj, "stm32f4");
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STATIC const MP_DEFINE_STR_OBJ(os_uname_info_nodename_obj, "stm32f4");
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STATIC const MP_DEFINE_STR_OBJ(os_uname_info_release_obj, MICROPY_VERSION_STRING);
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STATIC const MP_DEFINE_STR_OBJ(os_uname_info_version_obj, MICROPY_GIT_TAG " on " MICROPY_BUILD_DATE);
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STATIC const MP_DEFINE_STR_OBJ(os_uname_info_machine_obj, MICROPY_HW_BOARD_NAME " with " MICROPY_HW_MCU_NAME);
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STATIC MP_DEFINE_ATTRTUPLE(
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os_uname_info_obj,
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os_uname_info_fields,
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5,
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(mp_obj_t)&os_uname_info_sysname_obj,
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(mp_obj_t)&os_uname_info_nodename_obj,
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(mp_obj_t)&os_uname_info_release_obj,
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(mp_obj_t)&os_uname_info_version_obj,
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(mp_obj_t)&os_uname_info_machine_obj
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);
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mp_obj_t common_hal_os_uname(void) {
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return (mp_obj_t)&os_uname_info_obj;
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}
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#define RNG_TIMEOUT 5
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bool common_hal_os_urandom(uint8_t *buffer, uint32_t length) {
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#if (HAS_TRNG)
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//init the RNG
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__HAL_RCC_RNG_CLK_ENABLE();
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RNG_HandleTypeDef handle;
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handle.Instance = RNG;
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if (HAL_RNG_Init(&handle) != HAL_OK) mp_raise_ValueError(translate("RNG Init Error"));
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//Assign bytes
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for (uint i = 0; i < length; i++) {
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uint32_t temp;
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uint32_t start = HAL_GetTick();
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//the HAL function has a timeout, but it isn't long enough, and isn't adjustable
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while(!(__HAL_RNG_GET_FLAG(&handle,RNG_FLAG_DRDY)) && ((HAL_GetTick() - start) < RNG_TIMEOUT));
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//
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if (HAL_RNG_GenerateRandomNumber(&handle, &temp) != HAL_OK) {
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mp_raise_ValueError(translate("Random number generation error"));
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}
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*buffer = (uint8_t)temp;
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}
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//shut down the peripheral
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if (HAL_RNG_DeInit(&handle) != HAL_OK) mp_raise_ValueError(translate("RNG DeInit Error"));
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__HAL_RCC_RNG_CLK_DISABLE();
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return true;
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#else
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return false;
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#endif
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}
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