potentiometer-sensor.c

00001 /*
00002  * Copyright (c) 2011 Zolertia(TM) is a trademark by Advancare,SL
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  *
00030  * -----------------------------------------------------------------
00031  *
00032  * Author  : Enric M. Calvo (based on work by A. Dunkels, J. Eriksson, N. Finne)
00033  * Created : 2011-02-22
00034  *           $Revision: 1.0 $
00035  */
00036 
00037 #include "dev/potentiometer-sensor.h"
00038 #include "dev/sky-sensors.h"
00039 #include <io.h>
00040 
00041 /* Configure ADC12_2 to sample channel 11 (voltage) and use */
00042 /* the Vref+ as reference (SREF_1) since it is a stable reference */
00043 #define INPUT_CHANNEL          (1 << INCH_4)
00044 #define INPUT_REFERENCE        SREF_0
00045 #define POTENTIOMETER_MEM      ADC12MEM4
00046 
00047 const struct sensors_sensor battery_sensor;
00048 /*---------------------------------------------------------------------------*/
00049 static int
00050 value(int type)
00051 {
00052   return POTENTIOMETER_MEM;
00053 }
00054 /*---------------------------------------------------------------------------*/
00055 static int
00056 configure(int type, int c)
00057 {
00058   return sky_sensors_configure(INPUT_CHANNEL, INPUT_REFERENCE, type, c);
00059 }
00060 /*---------------------------------------------------------------------------*/
00061 static int
00062 status(int type)
00063 {
00064   return sky_sensors_status(INPUT_CHANNEL, type);
00065 }
00066 /*---------------------------------------------------------------------------*/
00067 SENSORS_SENSOR(potentiometer_sensor, POTENTIOMETER_SENSOR, value, configure, status);

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