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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 * $Id: temperature-sensor.c,v 1.3 2010/02/08 00:00:45 nifi Exp $ 00030 * 00031 * ----------------------------------------------------------------- 00032 * 00033 * Author : Adam Dunkels, Joakim Eriksson, Niclas Finne 00034 * Created : 2005-11-01 00035 * Updated : $Date: 2010/02/08 00:00:45 $ 00036 * $Revision: 1.3 $ 00037 */ 00038 00039 #include "dev/temperature-sensor.h" 00040 #include "dev/ds1629.h" 00041 00042 const struct sensors_sensor temperature_sensor; 00043 static int active; 00044 00045 /*---------------------------------------------------------------------------*/ 00046 static int 00047 value(int type) 00048 { 00049 unsigned int temp; 00050 signed int t; 00051 00052 t = ds1629_temperature(); 00053 temp = ((t / 128) * 50); 00054 return temp; 00055 } 00056 /*---------------------------------------------------------------------------*/ 00057 static int 00058 configure(int type, int value) 00059 { 00060 switch(type) { 00061 case SENSORS_HW_INIT: 00062 active = 0; 00063 ds1629_init(); 00064 return 1; 00065 case SENSORS_ACTIVE: 00066 if(value) { 00067 if(!active) { 00068 active = 1; 00069 ds1629_start(); 00070 } 00071 } else { 00072 active = 0; 00073 } 00074 return 1; 00075 } 00076 return 0; 00077 } 00078 /*---------------------------------------------------------------------------*/ 00079 static int 00080 status(int type) 00081 { 00082 switch(type) { 00083 case SENSORS_ACTIVE: 00084 case SENSORS_READY: 00085 return active; 00086 } 00087 return 0; 00088 } 00089 /*---------------------------------------------------------------------------*/ 00090 SENSORS_SENSOR(temperature_sensor, TEMPERATURE_SENSOR, 00091 value, configure, status);