1 /*
2 * Copyright (c) 2022 - 2024, Nordic Semiconductor ASA
3 * All rights reserved.
4 *
5 * SPDX-License-Identifier: BSD-3-Clause
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions are met:
9 *
10 * 1. Redistributions of source code must retain the above copyright notice, this
11 * list of conditions and the following disclaimer.
12 *
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * 3. Neither the name of the copyright holder nor the names of its
18 * contributors may be used to endorse or promote products derived from this
19 * software without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
22 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
25 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
26 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
27 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
29 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
30 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
31 * POSSIBILITY OF SUCH DAMAGE.
32 */
33
34 #include <nrfx_example.h>
35 #include <nrfx_rng.h>
36
37 #define NRFX_LOG_MODULE EXAMPLE
38 #define NRFX_EXAMPLE_CONFIG_LOG_ENABLED 1
39 #define NRFX_EXAMPLE_CONFIG_LOG_LEVEL 3
40 #include <nrfx_log.h>
41
42 /**
43 * @defgroup nrfx_rng_example Basic RNG example
44 * @{
45 * @ingroup nrfx_rng_examples
46 *
47 * @brief Example showing basic functionality of nrfx_rng driver.
48 *
49 * @details Application initializes nrfx_rng driver. The @ref rng_handler() is executed with relevant
50 * log message, until a number of generated numbers is equal to the value specified by the user.
51 */
52
53 /** @brief Symbol specifying number of random values to generate. */
54 #define RNG_ITERATIONS 5UL
55
56 /**
57 * @brief Function for handling RNG driver events.
58 *
59 * @param[in] rng_data Data passed to the event handler.
60 */
rng_handler(uint8_t rng_data)61 static void rng_handler(uint8_t rng_data)
62 {
63 static uint32_t i = 0;
64
65 if (i < RNG_ITERATIONS)
66 {
67 NRFX_LOG_INFO("Generated value: %d", rng_data);
68 i++;
69 }
70 else
71 {
72 nrfx_rng_stop();
73 }
74 }
75
76 /**
77 * @brief Function for application main entry.
78 *
79 * @return Nothing.
80 */
main(void)81 int main(void)
82 {
83 nrfx_err_t status;
84 (void)status;
85
86 #if defined(__ZEPHYR__)
87 IRQ_CONNECT(NRFX_IRQ_NUMBER_GET(NRF_RNG), IRQ_PRIO_LOWEST, nrfx_rng_irq_handler, 0, 0);
88 #endif
89
90 NRFX_EXAMPLE_LOG_INIT();
91
92 NRFX_LOG_INFO("Starting nrfx_rng example:");
93 NRFX_EXAMPLE_LOG_PROCESS();
94
95 nrfx_rng_config_t config = NRFX_RNG_DEFAULT_CONFIG;
96 status = nrfx_rng_init(&config, rng_handler);
97 NRFX_ASSERT(status == NRFX_SUCCESS);
98
99 nrfx_rng_start();
100
101 while (1)
102 {
103 NRFX_EXAMPLE_LOG_PROCESS();
104 }
105 }
106
107 /** @} */
108
