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Merge pull request #1607 from haukepetersen/add_nrf_random

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cpu/nrf51822: added random number generator driver
This commit is contained in:
Thomas Eichinger 2014-08-25 14:51:18 +02:00
commit 6f83609107
3 changed files with 71 additions and 0 deletions
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7
boards/pca10000/include/periph_conf.h
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@ -85,6 +85,13 @@
#define UART_0_PIN_CTS 10
/** @} */
/**
* @name Random Number Generator configuration
* @{
*/
#define RANDOM_NUMOF (1U)
/** @} */
/**
* @name GPIO configuration
* @{

7
boards/pca10005/include/periph_conf.h
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@ -70,6 +70,13 @@
#define UART_0_PIN_TX 9
/** @} */
/**
* @name Random Number Generator configuration
* @{
*/
#define RANDOM_NUMOF (1U)
/** @} */
/**
* @name GPIO configuration

57
cpu/nrf51822/periph/random.c Normal file
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@ -0,0 +1,57 @@
/*
* Copyright (C) 2014 Freie Universität Berlin
*
* This file is subject to the terms and conditions of the GNU Lesser General
* Public License v2.1. See the file LICENSE in the top level directory for more
* details.
*/
/**
* @ingroup cpu_nrf51822
* @{
*
* @file
* @brief Driver for the NRF51822 random number generator
*
* @author Hauke Petersen <hauke.petersen@fu-berlin.de>
*
* @}
*/
#include "cpu.h"
#include "periph_conf.h"
#include "periph/random.h"
/* guard file in case no random device was specified */
#if RANDOM_NUMOF
void random_init(void)
{
NRF_RNG->POWER = 1;
NRF_RNG->TASKS_START = 1;
}
int random_read(char *buf, unsigned int num)
{
unsigned int count = 0;
while (count < num) {
while (NRF_RNG->EVENTS_VALRDY == 0);
NRF_RNG->EVENTS_VALRDY = 0;
buf[count++] = (char)NRF_RNG->VALUE;
}
return count;
}
void random_poweron(void)
{
NRF_RNG->POWER = 1;
}
void random_poweroff(void)
{
NRF_RNG->POWER = 0;
}
#endif /* RANDOM_NUMOF */