contiki/examples/esb/beeper.c

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/*
* Copyright (c) 2005, Swedish Institute of Computer Science
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* This file is part of the Contiki operating system.
*
*/
#include "contiki-esb.h"
PROCESS(beeper_process, "Beeper");
AUTOSTART_PROCESSES(&beeper_process);
static struct etimer etimer;
static struct pt beeper_pt;
static
PT_THREAD(beeper_thread(struct pt *pt))
{
PT_BEGIN(pt);
while(1) {
PT_WAIT_UNTIL(pt, etimer_expired(&etimer));
etimer_reset(&etimer);
leds_invert(LEDS_RED);
beep();
PT_WAIT_UNTIL(pt, etimer_expired(&etimer));
etimer_reset(&etimer);
leds_invert(LEDS_RED);
}
PT_END(pt);
}
PROCESS_THREAD(beeper_process, ev, data)
{
PROCESS_EXITHANDLER(goto exit);
PROCESS_BEGIN();
etimer_set(&etimer, CLOCK_SECOND / 2);
PT_INIT(&beeper_pt);
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button_sensor.configure(SENSORS_ACTIVE, 1);
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while(1) {
beeper_thread(&beeper_pt);
PROCESS_WAIT_EVENT();
if(ev == sensors_event && data == &button_sensor) {
leds_invert(LEDS_YELLOW);
}
}
exit:
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;
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PROCESS_END();
}