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96 lines
2.4 KiB
C
96 lines
2.4 KiB
C
/*
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* Copyright (C) 2017 Inria
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* 2017 Freie Universität Berlin
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* 2018 Josua Arndt
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*
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* This file is subject to the terms and conditions of the GNU Lesser
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* General Public License v2.1. See the file LICENSE in the top level
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* directory for more details.
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*/
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/**
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* @ingroup tests
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* @{
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*
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* @file
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* @brief xtimer_usleep test application
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*
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* @author Francisco Acosta <francisco.acosta@inria.fr>
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* @author Martine Lenders <m.lenders@fu-berlin.de>
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* @author Josua Arndt <jarndt@ias.rwth-aachen.de>
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* @}
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*/
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#include <inttypes.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include "xtimer.h"
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#include "timex.h"
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#define RUNS (5U)
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#define SLEEP_TIMES_NUMOF ARRAY_SIZE(sleep_times)
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static const uint32_t sleep_times[] = { 10000, 50000, 10234, 56780, 12122, 98765, 75000 };
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#define ERROR_US 70
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/*
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* To use a pin to probe the sleep times enable the gpio module and define
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* SLEEP_PORT and SLEEP_PIN in the makefile, the port information can be found
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* in the enum in `cpu/include/periph_cpu.h`.
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*
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* FEATURES_REQUIRED += periph_gpio
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* CFLAGS += -DSLEEP_PIN=7
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* CFLAGS += -DSLEEP_PORT=PORT_F
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* */
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#ifdef SLEEP_PIN
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#include "board.h"
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#include "periph/gpio.h"
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#endif
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int main(void)
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{
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uint32_t start_test, testtime;
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#ifdef SLEEP_PIN
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printf("Debug port 0x%02x pin %d\n", SLEEP_PORT, SLEEP_PIN);
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gpio_t sleep_pin = GPIO_PIN(SLEEP_PORT, SLEEP_PIN);
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gpio_init(sleep_pin, GPIO_OUT);
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#endif
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printf("Running test %u times with %u distinct sleep times\n", RUNS,
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(unsigned)SLEEP_TIMES_NUMOF);
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start_test = xtimer_now_usec();
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for (unsigned m = 0; m < RUNS; m++) {
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for (unsigned n = 0;
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n < ARRAY_SIZE(sleep_times);
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n++) {
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uint32_t start_sleep, diff;
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int32_t err;
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start_sleep = xtimer_now_usec();
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#ifdef SLEEP_PIN
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gpio_set(sleep_pin);
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#endif
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xtimer_usleep(sleep_times[n]);
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#ifdef SLEEP_PIN
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gpio_clear(sleep_pin);
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#endif
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diff = xtimer_now_usec() - start_sleep;
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err = diff - sleep_times[n];
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printf("Slept for %" PRIu32 " us (expected: %" PRIu32 " us) "
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"Offset: %" PRIi32 " us\n", diff, sleep_times[n], err);
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}
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}
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testtime = xtimer_now_usec() - start_test;
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printf("Test ran for %" PRIu32 " us\n", testtime);
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return 0;
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}
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