115 lines
3.7 KiB
C
115 lines
3.7 KiB
C
/**
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* Copyright (c) 2014 - 2020, Nordic Semiconductor ASA
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*
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* 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, except as embedded into a Nordic
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* Semiconductor ASA integrated circuit in a product or a software update for
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* such product, must reproduce the above copyright notice, this list of
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* conditions and the following disclaimer in the documentation and/or other
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* 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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* 4. This software, with or without modification, must only be used with a
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* Nordic Semiconductor ASA integrated circuit.
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*
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* 5. Any software provided in binary form under this license must not be reverse
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* engineered, decompiled, modified and/or disassembled.
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*
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* THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS
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* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA 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 SUBSTITUTE
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* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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/** @file
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* @defgroup rng_example_main main.c
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* @{
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* @ingroup rng_example
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* @brief Random Number Generator Example Application main file.
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*
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*/
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#include <stdio.h>
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#include <stdint.h>
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#include "nrf_delay.h"
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#include "app_error.h"
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#include "nrf_drv_rng.h"
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#include "nrf_assert.h"
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#include "nrf_log.h"
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#include "nrf_log_ctrl.h"
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#include "nrf_log_default_backends.h"
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#define RANDOM_BUFF_SIZE 16 /**< Random numbers buffer size. */
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/** @brief Function for getting vector of random numbers.
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*
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* @param[out] p_buff Pointer to unit8_t buffer for storing the bytes.
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* @param[in] length Number of bytes to take from pool and place in p_buff.
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*
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* @retval Number of bytes actually placed in p_buff.
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*/
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static uint8_t random_vector_generate(uint8_t * p_buff, uint8_t size)
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{
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uint32_t err_code;
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uint8_t available;
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nrf_drv_rng_bytes_available(&available);
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uint8_t length = MIN(size, available);
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err_code = nrf_drv_rng_rand(p_buff, length);
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APP_ERROR_CHECK(err_code);
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return length;
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}
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/** @brief Function for main application entry.
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*/
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int main(void)
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{
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uint32_t err_code;
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err_code = NRF_LOG_INIT(NULL);
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APP_ERROR_CHECK(err_code);
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NRF_LOG_DEFAULT_BACKENDS_INIT();
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err_code = nrf_drv_rng_init(NULL);
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APP_ERROR_CHECK(err_code);
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NRF_LOG_INFO("RNG example started.");
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while (true)
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{
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uint8_t p_buff[RANDOM_BUFF_SIZE];
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uint8_t length = random_vector_generate(p_buff,RANDOM_BUFF_SIZE);
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NRF_LOG_INFO("Random Vector:");
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NRF_LOG_HEXDUMP_INFO(p_buff, length);
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NRF_LOG_INFO("");
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NRF_LOG_FLUSH();
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nrf_delay_ms(100);
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}
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}
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/** @} */
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