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 1.5 2010/02/08 00:00:45 nifi Exp $
00032  */
00033 
00034 #include "dev/radio-sensor.h"
00035 #include "dev/irq.h"
00036 #include "dev/tr1001.h"
00037 #include <io.h>
00038 
00039 const struct sensors_sensor radio_sensor;
00040 
00041 unsigned int radio_sensor_signal;
00042 
00043 /*---------------------------------------------------------------------------*/
00044 static int
00045 irq(void)
00046 {
00047   radio_sensor_signal = ADC12MEM5;
00048   return 0;
00049 }
00050 /*---------------------------------------------------------------------------*/
00051 static int
00052 value(int type)
00053 {
00054   switch(type) {
00055   case RADIO_SENSOR_LAST_PACKET:
00056     return tr1001_sstrength();
00057   case RADIO_SENSOR_LAST_VALUE:
00058   default:
00059     return radio_sensor_signal;
00060   }
00061 }
00062 /*---------------------------------------------------------------------------*/
00063 static int
00064 configure(int type, int value)
00065 {
00066   switch(type) {
00067   case SENSORS_HW_INIT:
00068     /* Initialization of ADC12 done by irq */
00069     radio_sensor_signal = 0;
00070     return 1;
00071   case SENSORS_ACTIVE:
00072     if(value) {
00073       if(!irq_adc12_active(5)) {
00074         irq_adc12_activate(5, (INCH_5 + SREF_0), irq);
00075       }
00076     } else {
00077       irq_adc12_deactivate(5);
00078       radio_sensor_signal = 0;
00079     }
00080     return 1;
00081   }
00082   return 0;
00083 }
00084 /*---------------------------------------------------------------------------*/
00085 static int
00086 status(int type)
00087 {
00088   switch(type) {
00089   case SENSORS_ACTIVE:
00090   case SENSORS_READY:
00091     return irq_adc12_active(5);
00092   }
00093   return 0;
00094 }
00095 /*---------------------------------------------------------------------------*/
00096 SENSORS_SENSOR(radio_sensor, RADIO_SENSOR,
00097                value, configure, status);

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