contiki/platform/esb/dev/temperature-sensor.c

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2006-06-18 07:49:33 +00:00
/*
* 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.
*
* $Id: temperature-sensor.c,v 1.1 2006/06/18 07:49:33 adamdunkels Exp $
*
* -----------------------------------------------------------------
*
* Author : Adam Dunkels, Joakim Eriksson, Niclas Finne
* Created : 2005-11-01
* Updated : $Date: 2006/06/18 07:49:33 $
* $Revision: 1.1 $
*/
#include "dev/temperature-sensor.h"
#include "dev/ds1629.h"
const struct sensors_sensor temperature_sensor;
static unsigned char flags;
/*---------------------------------------------------------------------------*/
static void
init(void)
{
flags = 0;
ds1629_init();
}
/*---------------------------------------------------------------------------*/
static int
irq(void)
{
return 0;
}
/*---------------------------------------------------------------------------*/
static void
activate(void)
{
flags |= 1;
ds1629_start();
}
/*---------------------------------------------------------------------------*/
static void
deactivate(void)
{
flags &= ~1;
}
/*---------------------------------------------------------------------------*/
static int
active(void)
{
return (flags & 1);
}
/*---------------------------------------------------------------------------*/
static unsigned int
value(int type)
{
unsigned int temp;
signed int t = ds1629_temperature();
temp = ((t / 128) * 50);
return temp;
}
/*---------------------------------------------------------------------------*/
static int
configure(int type, void *c)
{
return 0;
}
/*---------------------------------------------------------------------------*/
static void *
status(int type)
{
return NULL;
}
/*---------------------------------------------------------------------------*/
SENSORS_SENSOR(temperature_sensor, TEMPERATURE_SENSOR,
init, irq, activate, deactivate, active,
value, configure, status);