Contiki 2.6

radio-sensor.c

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 Contiki operating system.
00030  *
00031  * @(#)$Id: radio-sensor.c,v 1.7 2010/08/25 19:30:53 nifi Exp $
00032  */
00033 
00034 #include "lib/sensors.h"
00035 #include "dev/cc2420.h"
00036 #include "dev/radio-sensor.h"
00037 
00038 const struct sensors_sensor radio_sensor;
00039 static int active;
00040 
00041 /*---------------------------------------------------------------------------*/
00042 static int
00043 value(int type)
00044 {
00045   switch(type) {
00046   case RADIO_SENSOR_LAST_PACKET:
00047     return cc2420_last_correlation;
00048   case RADIO_SENSOR_LAST_VALUE:
00049   default:
00050     return cc2420_last_rssi;
00051   }
00052 }
00053 /*---------------------------------------------------------------------------*/
00054 static int
00055 configure(int type, int c)
00056 {
00057   if(type == SENSORS_ACTIVE) {
00058     active = c;
00059     return 1;
00060   }
00061   return 0;
00062 }
00063 /*---------------------------------------------------------------------------*/
00064 static int
00065 status(int type)
00066 {
00067   switch(type) {
00068   case SENSORS_ACTIVE:
00069   case SENSORS_READY:
00070     return active;
00071   }
00072   return 0;
00073 }
00074 /*---------------------------------------------------------------------------*/
00075 SENSORS_SENSOR(radio_sensor, RADIO_SENSOR,
00076                value, configure, status);