contiki/platform/esb/dev/pir-sensor.c
2010-02-08 00:00:45 +00:00

98 lines
3.0 KiB
C

/*
* 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.
*
* @(#)$Id: pir-sensor.c,v 1.4 2010/02/08 00:00:45 nifi Exp $
*/
#include "dev/pir-sensor.h"
#include "dev/irq.h"
#include "dev/hwconf.h"
const struct sensors_sensor pir_sensor;
static unsigned int pir;
#define PIR_IRQ() 3
HWCONF_PIN(PIR, 1, PIR_IRQ());
HWCONF_IRQ(PIR, 1, PIR_IRQ());
/*---------------------------------------------------------------------------*/
static int
irq(void)
{
++pir;
sensors_changed(&pir_sensor);
return 1;
}
/*---------------------------------------------------------------------------*/
static int
value(int type)
{
return pir;
}
/*---------------------------------------------------------------------------*/
static int
configure(int type, int value)
{
switch(type) {
case SENSORS_HW_INIT:
pir = 0;
PIR_SELECT();
PIR_MAKE_INPUT();
return 1;
case SENSORS_ACTIVE:
if(value) {
if(!PIR_IRQ_ENABLED()) {
irq_port1_activate(PIR_IRQ(), irq);
PIR_ENABLE_IRQ();
}
} else {
PIR_DISABLE_IRQ();
irq_port1_deactivate(PIR_IRQ());
}
return 1;
}
return 0;
}
/*---------------------------------------------------------------------------*/
static int
status(int type)
{
switch(type) {
case SENSORS_ACTIVE:
case SENSORS_READY:
return PIR_IRQ_ENABLED();
}
return 0;
}
/*---------------------------------------------------------------------------*/
SENSORS_SENSOR(pir_sensor, PIR_SENSOR,
value, configure, status);