ds1629.h

Contiki是一个开源

/*
 * 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 Configurable Sensor Network Application
 * Architecture for sensor nodes running the Contiki operating system.
 *
 * $Id: ds1629.h,v 1.1 2006/06/18 07:49:33 adamdunkels Exp $
 *
 * -----------------------------------------------------------------
 *
 * Author  : Adam Dunkels, Joakim Eriksson, Niclas Finne
 * Created : 2005-11-08
 * Updated : $Date: 2006/06/18 07:49:33 $
 *           $Revision: 1.1 $
 */

#ifndef __DS1629_H__
#define __DS1629_H__

/**
 * DS1629 initialization function.
 *
 * This function should be called at startup to initialize the DS1629
 * and its clock.
 */
void ds1629_init(void);

/**
 * DS1629 start conversion function.
 *
 * This function should be called before requesting the temperature
 * the first time.
 */
void ds1629_start(void);

/**
 * Get the temperature.
 *
 * This function will return the current temperature as a signed 9 bit
 * value in terms of a 0.5 degree Celsius least significant bit.
 *
 * MSB Sign  2^6   2^5   2^4   2^3   2^2   2^1   2^0
 * LSB 2^-1  0     0     0     0     0     0     0
 */
signed int ds1629_temperature(void);

#endif /* __DS1629_H__ */