Contiki 2.6

light-sensor.c

00001 /*
00002  * Copyright (c) 2005-2010, 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: light-sensor.c,v 1.7 2010/08/25 19:30:53 nifi Exp $
00032  */
00033 
00034 #include "contiki.h"
00035 #include "lib/sensors.h"
00036 #include "dev/sky-sensors.h"
00037 #include "dev/light-sensor.h"
00038 
00039 /* Photodiode 1 (P64) on INCH_4 */
00040 /* Photodiode 2 (P65) on INCH_5 */
00041 #define INPUT_CHANNEL      ((1 << INCH_4) | (1 << INCH_5))
00042 #define INPUT_REFERENCE     SREF_0
00043 #define PHOTOSYNTHETIC_MEM  ADC12MEM4
00044 #define TOTAL_SOLAR_MEM     ADC12MEM5
00045 
00046 const struct sensors_sensor light_sensor;
00047 
00048 /*---------------------------------------------------------------------------*/
00049 static int
00050 value(int type)
00051 {
00052   switch(type) {
00053     /* Photosynthetically Active Radiation. */
00054   case LIGHT_SENSOR_PHOTOSYNTHETIC:
00055     return PHOTOSYNTHETIC_MEM;
00056 
00057     /* Total Solar Radiation. */
00058   case LIGHT_SENSOR_TOTAL_SOLAR:
00059     return TOTAL_SOLAR_MEM;
00060   }
00061   return 0;
00062 }
00063 /*---------------------------------------------------------------------------*/
00064 static int
00065 status(int type)
00066 {
00067   return sky_sensors_status(INPUT_CHANNEL, type);
00068 }
00069 /*---------------------------------------------------------------------------*/
00070 static int
00071 configure(int type, int c)
00072 {
00073   return sky_sensors_configure(INPUT_CHANNEL, INPUT_REFERENCE, type, c);
00074 }
00075 /*---------------------------------------------------------------------------*/
00076 SENSORS_SENSOR(light_sensor, "Light", value, configure, status);