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This test checks, if the timer returns the correct time (xtimer_now_usec() is called), when interrupts are disabled. Specifically tested is if the time is correct after a low-level timer overflow.
48 lines
1.0 KiB
C
48 lines
1.0 KiB
C
/*
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* Copyright (C) 2020 Freie Universität Berlin,
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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 testing xtimer_now_usec function with irq disabled
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*
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*
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* @author Julian Holzwarth <julian.holzwarth@fu-berlin.de>
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*
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*/
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#include <stdio.h>
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#include "xtimer.h"
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#include "irq.h"
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#define TEST_COUNT 4
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int main(void)
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{
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puts("xtimer_now_irq test application.\n");
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uint8_t count = TEST_COUNT;
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while (count) {
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unsigned int state = irq_disable();
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uint32_t t1 = xtimer_now_usec();
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xtimer_spin(xtimer_ticks((uint32_t)(~XTIMER_MASK) / 2));
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uint32_t t2 = xtimer_now_usec();
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irq_restore(state);
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if (t2 < t1) {
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puts("ERROR: wrong time with interrupts disabled");
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return -1;
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}
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puts("OK");
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count --;
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}
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puts("SUCCESS");
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return 0;
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}
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