main.c
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/*
* Copyright (C) 2014-2016 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 Test case for the low-level DAC driver
*
* @author Peter Kietzmann <peter.kietzmann@haw-hamburg.de>
* @author Hauke Petersen <hauke.petersen@fu-berlin.de>
*
* @}
*/
#include <stdio.h>
#include "xtimer.h"
#include "periph/dac.h"
#define DELAY (100U)
#define STEPS (1000U)
int main(void)
{
xtimer_ticks32_t last = xtimer_now();
uint16_t val = 0;
uint16_t step = 0xffff / STEPS;
puts("\nRIOT DAC peripheral driver test\n");
puts("This test application produces a saw tooth signal on each available\n"
"DAC line. The period of the signal should be around 100ms\n");
/* initialize all DAC lines */
for (int i = 0; i < DAC_NUMOF; i++) {
if (dac_init(DAC_LINE(i)) < 0) {
printf("Error initializing DAC_LINE(%i)\n", i);
return 1;
}
else {
printf("Successfully initialized DAC_LINE(%i)\n", i);
}
}
puts("");
/* create saw tooth signal */
while (1) {
for (int i = 0; i < DAC_NUMOF; i++) {
dac_set(DAC_LINE(i), val);
}
val += step;
xtimer_periodic_wakeup(&last, DELAY);
}
return 0;
}