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d3d3c1c036
This avoids false test failures when the RTT retains its old counter value across reboots/resets.
65 lines
1.3 KiB
C
65 lines
1.3 KiB
C
/*
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* Copyright (C) 2014 Freie Universität Berlin
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*
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* This file is subject to the terms and conditions of the GNU Lesser General
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* Public License v2.1. See the file LICENSE in the top level directory for more
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* 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 Test for low-level Real Time Timer drivers
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*
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* This test will initialize the real-time timer and trigger an alarm printing
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* 'Hello' every 10 seconds
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*
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* @author Hauke Petersen <hauke.petersen@fu-berlin.de>
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*
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* @}
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*/
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#include <stdio.h>
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#include <stdint.h>
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#include <inttypes.h>
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#include "cpu.h"
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#include "periph_conf.h"
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#include "periph/rtt.h"
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#define TICKS_TO_WAIT (10 * RTT_FREQUENCY)
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static volatile uint32_t last;
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void cb(void *arg)
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{
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(void)arg;
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last += TICKS_TO_WAIT;
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last &= RTT_MAX_VALUE;
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rtt_set_alarm(last, cb, 0);
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puts("Hello");
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}
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int main(void)
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{
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puts("\nRIOT RTT low-level driver test");
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puts("This test will display 'Hello' every 10 seconds\n");
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puts("Initializing the RTT driver");
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rtt_init();
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uint32_t now = rtt_get_counter();
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printf("RTT now: %" PRIu32 "\n", now);
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last = (now + TICKS_TO_WAIT) & RTT_MAX_VALUE;
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printf("Setting initial alarm to now + 10 s (%" PRIu32 ")\n", last);
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rtt_set_alarm(last, cb, 0);
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puts("Done setting up the RTT, wait for many Hellos");
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return 0;
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}
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