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/*
* Copyright (C) 2015 Kaspar Schleiser <kaspar@schleiser.de>
*
* 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 timer test application
*
* @author Kaspar Schleiser <kaspar@schleiser.de>
*
* @}
*/
#include <stdio.h>
#include "xtimer.h"
#include "periph_conf.h"
#ifndef NUMOF
#define NUMOF (256)
#endif
int32_t res[NUMOF];
int main(void)
{
puts("xtimer_periodic_wakeup test application.\n");
uint32_t interval = NUMOF;
int32_t max_diff = INT32_MIN;
int32_t min_diff = INT32_MAX;
for (int i = 0; i < NUMOF; i++) {
xtimer_ticks32_t now = xtimer_now();
printf("Testing interval %" PRIu32 "... (now=%" PRIu32 ")\n", interval, xtimer_usec_from_ticks(now));
xtimer_ticks32_t last_wakeup = xtimer_now();
xtimer_ticks32_t before = last_wakeup;
xtimer_periodic_wakeup(&last_wakeup, interval);
now = xtimer_now();
res[i] = (xtimer_usec_from_ticks(now) - xtimer_usec_from_ticks(before)) - interval;
interval -= 1;
}
for (int i = 0; i < NUMOF; i++) {
printf("%4d diff=%" PRIi32 "\n", NUMOF - i, res[i]);
if (res[i] > max_diff) {
max_diff = res[i];
}
if (res[i] < min_diff) {
min_diff = res[i];
}
}
printf("\nMin/max error: %" PRId32 "/%" PRId32 "\n", min_diff, max_diff);
if (min_diff < -1000 || max_diff > 1000) {
puts("too large difference.\n");
puts("Test Failed.\n");
return 1;
}
printf("\nTest complete.\n");
return 0;
}