| /* Copyright (c) 2019, Nordic Semiconductor ASA |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are met: |
| * |
| * 1. Redistributions of source code must retain the above copyright notice, this |
| * list of conditions and the following disclaimer. |
| * |
| * 2. Redistributions in binary form must reproduce the above copyright notice, |
| * this list of conditions and the following disclaimer in the documentation |
| * and/or other materials provided with the distribution. |
| * |
| * 3. Neither the name of Nordic Semiconductor ASA nor the names of its |
| * contributors may be used to endorse or promote products derived from |
| * this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE |
| * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
| * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER |
| * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| * |
| */ |
| |
| /** |
| * @file |
| * This file implements the pseudo-random number generator abstraction layer. |
| * |
| * This pseudo-random number abstraction layer uses standard library rand() function. |
| * |
| */ |
| |
| #include "nrf_802154_random.h" |
| |
| #include <stdlib.h> |
| #include <stdint.h> |
| |
| #include "nrf.h" |
| |
| #if RAAL_SOFTDEVICE |
| #include <softdevice.h> |
| #endif // RAAL_SOFTDEVICE |
| |
| void nrf_802154_random_init(void) |
| { |
| uint32_t seed; |
| |
| #if RAAL_SOFTDEVICE |
| uint32_t result; |
| |
| do |
| { |
| result = sd_rand_application_vector_get((uint8_t *)&seed, sizeof(seed)); |
| } |
| while (result != NRF_SUCCESS); |
| #else // RAAL_SOFTDEVICE |
| NRF_RNG->TASKS_START = 1; |
| |
| while (!NRF_RNG->EVENTS_VALRDY); |
| NRF_RNG->EVENTS_VALRDY = 0; |
| |
| seed = NRF_RNG->VALUE; |
| #endif // RAAL_SOFTDEVICE |
| |
| srand((unsigned int)seed); |
| } |
| |
| void nrf_802154_random_deinit(void) |
| { |
| // Intentionally empty |
| } |
| |
| uint32_t nrf_802154_random_get(void) |
| { |
| return (uint32_t)rand(); |
| } |