RIOT/tests/xtimer_usleep_until/main.c

/*
 * 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"

#define NUMOF 1000

uint32_t res[NUMOF];

int main(void)
{
    puts("xtimer_usleep_until test application.\n");

    uint32_t interval = 1000;

    for (int i = 0; i < NUMOF; i++) {
        printf("Testing interval %u...\n", (unsigned)interval);
        uint32_t last_wakeup = xtimer_now();
        uint32_t before = last_wakeup;
        xtimer_usleep_until(&last_wakeup, (unsigned)interval);
        uint32_t diff = (xtimer_now()-before)-interval;
        res[i] = diff;
        interval -= 1;
    }

    for (int i = 0; i < NUMOF; i++) {
        printf("%4d diff=%i\n", i, (int)res[i]);
    }

    printf("\nTest complete.\n");
    return 0;
}