Contiki-NG
random.c
Go to the documentation of this file.
1 /*
2  * Copyright (c) 2016, University of Bristol - http://www.bristol.ac.uk
3  * All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  * 1. Redistributions of source code must retain the above copyright
9  * notice, this list of conditions and the following disclaimer.
10  * 2. Redistributions in binary form must reproduce the above copyright
11  * notice, this list of conditions and the following disclaimer in the
12  * documentation and/or other materials provided with the distribution.
13  * 3. Neither the name of the copyright holder nor the names of its
14  * contributors may be used to endorse or promote products derived
15  * from this software without specific prior written permission.
16  *
17  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
18  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
19  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
20  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
21  * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
22  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
23  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
24  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
26  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
27  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
28  * OF THE POSSIBILITY OF SUCH DAMAGE.
29  */
30 /*---------------------------------------------------------------------------*/
31 /**
32  * \addtogroup cc26xx-trng
33  * @{
34  *
35  * \file
36  *
37  * This file overrides os/lib/random.c and calls SoC-specific RNG functions
38  */
39 /*---------------------------------------------------------------------------*/
40 #include "contiki.h"
41 #include "dev/soc-trng.h"
42 /*---------------------------------------------------------------------------*/
43 /**
44  * \brief Generates a new random number using the hardware TRNG.
45  * \return The random number.
46  */
47 unsigned short
49 {
50  return (unsigned short)soc_trng_rand_synchronous() & 0xFFFF;
51 }
52 /*---------------------------------------------------------------------------*/
53 /**
54  * \brief Function required by the API
55  * \param seed Ignored.
56  */
57 void
58 random_init(unsigned short seed)
59 {
60  soc_trng_init();
61 }
62 /*---------------------------------------------------------------------------*/
63 /**
64  * @}
65  */
void soc_trng_init()
Initialise the CC13xx/CC26xx TRNG driver.
Definition: soc-trng.c:298
Header file for the CC13xx/CC26xx TRNG driver.
void random_init(unsigned short seed)
Seed the cc2538 random number generator.
Definition: random.c:84
uint64_t soc_trng_rand_synchronous()
Returns a minimum entropy random number.
Definition: soc-trng.c:145
unsigned short random_rand(void)
Generates a new random number using the cc2538 RNG.
Definition: random.c:58