contiki/platform/esb/dev/temperature-sensor.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.
*
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* $Id: temperature-sensor.c,v 1.3 2010/02/08 00:00:45 nifi Exp $
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*
* -----------------------------------------------------------------
*
* Author : Adam Dunkels, Joakim Eriksson, Niclas Finne
* Created : 2005-11-01
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* Updated : $Date: 2010/02/08 00:00:45 $
* $Revision: 1.3 $
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*/
#include "dev/temperature-sensor.h"
#include "dev/ds1629.h"
const struct sensors_sensor temperature_sensor;
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static int active;
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/*---------------------------------------------------------------------------*/
static int
value(int type)
{
unsigned int temp;
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signed int t;
t = ds1629_temperature();
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temp = ((t / 128) * 50);
return temp;
}
/*---------------------------------------------------------------------------*/
static int
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configure(int type, int value)
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{
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switch(type) {
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case SENSORS_HW_INIT:
active = 0;
ds1629_init();
return 1;
case SENSORS_ACTIVE:
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if(value) {
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if(!active) {
active = 1;
ds1629_start();
}
} else {
active = 0;
}
return 1;
}
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return 0;
}
/*---------------------------------------------------------------------------*/
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static int
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status(int type)
{
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switch(type) {
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case SENSORS_ACTIVE:
case SENSORS_READY:
return active;
}
return 0;
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}
/*---------------------------------------------------------------------------*/
SENSORS_SENSOR(temperature_sensor, TEMPERATURE_SENSOR,
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value, configure, status);