ds1629.h

00001 /*
00002  * Copyright (c) 2005, Swedish Institute of Computer Science.
00003  * All rights reserved.
00004  *
00005  * Redistribution and use in source and binary forms, with or without
00006  * modification, are permitted provided that the following conditions
00007  * are met:
00008  * 1. Redistributions of source code must retain the above copyright
00009  *    notice, this list of conditions and the following disclaimer.
00010  * 2. Redistributions in binary form must reproduce the above copyright
00011  *    notice, this list of conditions and the following disclaimer in the
00012  *    documentation and/or other materials provided with the distribution.
00013  * 3. Neither the name of the Institute nor the names of its contributors
00014  *    may be used to endorse or promote products derived from this software
00015  *    without specific prior written permission.
00016  *
00017  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
00018  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
00019  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
00020  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
00021  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
00022  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
00023  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
00024  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
00025  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
00026  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
00027  * SUCH DAMAGE.
00028  *
00029  * This file is part of the Configurable Sensor Network Application
00030  * Architecture for sensor nodes running the Contiki operating system.
00031  *
00032  * $Id: ds1629.h,v 1.1 2006/06/18 07:49:33 adamdunkels Exp $
00033  *
00034  * -----------------------------------------------------------------
00035  *
00036  * Author  : Adam Dunkels, Joakim Eriksson, Niclas Finne
00037  * Created : 2005-11-08
00038  * Updated : $Date: 2006/06/18 07:49:33 $
00039  *           $Revision: 1.1 $
00040  */
00041 
00042 #ifndef __DS1629_H__
00043 #define __DS1629_H__
00044 
00045 /**
00046  * DS1629 initialization function.
00047  *
00048  * This function should be called at startup to initialize the DS1629
00049  * and its clock.
00050  */
00051 void ds1629_init(void);
00052 
00053 /**
00054  * DS1629 start conversion function.
00055  *
00056  * This function should be called before requesting the temperature
00057  * the first time.
00058  */
00059 void ds1629_start(void);
00060 
00061 /**
00062  * Get the temperature.
00063  *
00064  * This function will return the current temperature as a signed 9 bit
00065  * value in terms of a 0.5 degree Celsius least significant bit.
00066  *
00067  * MSB Sign  2^6   2^5   2^4   2^3   2^2   2^1   2^0
00068  * LSB 2^-1  0     0     0     0     0     0     0
00069  */
00070 signed int ds1629_temperature(void);
00071 
00072 #endif /* __DS1629_H__ */

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