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/*
* 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 tests
* @{
*
* @file
* @brief Low-level random number generator driver test
*
* @author Hauke Petersen <hauke.petersen@fu-berlin.de>
*
* @}
*/
#include <stdio.h>
#include <string.h>
#include "xtimer.h"
#include "periph/hwrng.h"
#define LIMIT (20U)
int main(void)
{
uint8_t buf[LIMIT];
puts("\nHWRNG peripheral driver test\n");
printf("This test will print from 1 to %u random bytes about every "
"second\n\n", LIMIT);
puts("Initializing the HWRNG driver.\n");
hwrng_init();
while (1) {
/* zero out buffer */
memset(buf, 0, sizeof(buf));
/* create random numbers */
for (unsigned i = 1; i <= LIMIT; i++) {
printf("generating %u random byte(s)\n", i);
hwrng_read(buf, i);
printf("Got:");
for (unsigned j = 0; j < i; j++) {
printf(" 0x%02x", (unsigned char)buf[j]);
}
printf("\n");
}
xtimer_usleep(1000 * 1000);
}
return 0;
}