Contiki 2.6

sensors.h

00001 /*
00002  * Copyright (c) 2009, 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 Contiki operating system.
00030  *
00031  * @(#)$Id: sensors.h,v 1.9 2010/02/23 18:27:04 adamdunkels Exp $
00032  */
00033 
00034 #ifndef __SENSORS_H__
00035 #define __SENSORS_H__
00036 
00037 #include "contiki.h"
00038 
00039 /* some constants for the configure API */
00040 #define SENSORS_HW_INIT 128 /* internal - used only for initialization */
00041 #define SENSORS_ACTIVE 129 /* ACTIVE => 0 -> turn off, 1 -> turn on */
00042 #define SENSORS_READY 130 /* read only */
00043 
00044 #define SENSORS_ACTIVATE(sensor) (sensor).configure(SENSORS_ACTIVE, 1)
00045 #define SENSORS_DEACTIVATE(sensor) (sensor).configure(SENSORS_ACTIVE, 0)
00046 
00047 #define SENSORS_SENSOR(name, type, value, configure, status)        \
00048 const struct sensors_sensor name = { type, value, configure, status }
00049 
00050 #define SENSORS_NUM (sizeof(sensors) / sizeof(struct sensors_sensor *))
00051 
00052 #define SENSORS(...) \
00053 const struct sensors_sensor *sensors[] = {__VA_ARGS__, NULL};       \
00054 unsigned char sensors_flags[SENSORS_NUM]
00055 
00056 struct sensors_sensor {
00057   char *       type;
00058   int          (* value)     (int type);
00059   int          (* configure) (int type, int value);
00060   int          (* status)    (int type);
00061 };
00062 
00063 const struct sensors_sensor *sensors_find(const char *type);
00064 const struct sensors_sensor *sensors_next(const struct sensors_sensor *s);
00065 const struct sensors_sensor *sensors_first(void);
00066 
00067 void sensors_changed(const struct sensors_sensor *s);
00068 
00069 extern process_event_t sensors_event;
00070 
00071 PROCESS_NAME(sensors_process);
00072 
00073 #endif /* __SENSORS_H__ */