contiki/platform/cooja/dev/button-sensor.c

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/*
* Copyright (c) 2006, 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.
*
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* $Id: button-sensor.c,v 1.6 2010/01/14 19:12:31 nifi Exp $
*/
#include "lib/sensors.h"
#include "dev/button-sensor.h"
#include "lib/simEnvChange.h"
const struct simInterface button_interface;
const struct sensors_sensor button_sensor;
static struct timer debouncetimer;
// COOJA variables
char simButtonChanged;
char simButtonIsDown;
char simButtonIsActive;
/*---------------------------------------------------------------------------*/
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static int
value(int type)
{
return simButtonIsDown || !timer_expired(&debouncetimer);
}
/*---------------------------------------------------------------------------*/
static int
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configure(int type, int c)
{
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if(type == SENSORS_ACTIVE) {
simButtonIsActive = c;
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return 1;
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} else if(type == SENSORS_HW_INIT) {
simButtonIsActive = 1;
timer_set(&debouncetimer, 0);
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return 1;
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}
return 0;
}
/*---------------------------------------------------------------------------*/
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static int
status(int type)
{
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return (type == SENSORS_ACTIVE) ? simButtonIsActive : 0;
}
/*---------------------------------------------------------------------------*/
static void
doInterfaceActionsBeforeTick(void)
{
// Check if button value has changed
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if(simButtonChanged && simButtonIsActive && simButtonIsDown) {
if(timer_expired(&debouncetimer)) {
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timer_set(&debouncetimer, CLOCK_SECOND / 10);
sensors_changed(&button_sensor);
}
}
simButtonChanged = 0;
}
/*---------------------------------------------------------------------------*/
static void
doInterfaceActionsAfterTick(void)
{
}
/*---------------------------------------------------------------------------*/
SIM_INTERFACE(button_interface,
doInterfaceActionsBeforeTick,
doInterfaceActionsAfterTick);
SENSORS_SENSOR(button_sensor, BUTTON_SENSOR,
value, configure, status);