101 lines
2.8 KiB
C
101 lines
2.8 KiB
C
/*
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* Copyright (c) 2017 - 2021, Nordic Semiconductor ASA
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* All rights reserved.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. Neither the name of Nordic Semiconductor ASA nor the names of its
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* contributors may be used to endorse or promote products derived from this
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* software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY, AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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/**
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* @file
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* This file implements the pseudo-random number generator abstraction layer.
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*
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* This pseudo-random number abstraction layer uses standard library rand() function.
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*
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*/
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#include "nrf_802154_random.h"
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#include <stdlib.h>
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#include <stdint.h>
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#include "nrf.h"
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#if RAAL_SOFTDEVICE
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#if defined (__GNUC__)
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_Pragma("GCC diagnostic push")
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_Pragma("GCC diagnostic ignored \"-Wreturn-type\"")
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_Pragma("GCC diagnostic ignored \"-Wunused-parameter\"")
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_Pragma("GCC diagnostic ignored \"-Wpedantic\"")
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#endif
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#include <nrf_soc.h>
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#if defined (__GNUC__)
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_Pragma("GCC diagnostic pop")
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#endif
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#endif // RAAL_SOFTDEVICE
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void nrf_802154_random_init(void)
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{
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uint32_t seed;
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#if RAAL_SOFTDEVICE
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uint32_t result;
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do
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{
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result = sd_rand_application_vector_get((uint8_t *)&seed, sizeof(seed));
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}
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while (result != NRF_SUCCESS);
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#else // RAAL_SOFTDEVICE
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NRF_RNG->TASKS_START = 1;
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while (!NRF_RNG->EVENTS_VALRDY);
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NRF_RNG->EVENTS_VALRDY = 0;
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NRF_RNG->TASKS_STOP = 1;
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seed = NRF_RNG->VALUE;
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#endif // RAAL_SOFTDEVICE
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srand((unsigned int)seed);
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}
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void nrf_802154_random_deinit(void)
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{
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// Intentionally empty
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}
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uint32_t nrf_802154_random_get(void)
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{
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return (uint32_t)rand();
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}
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