Contiki-NG
potentiometer-sensor.c
1 /*
2  * Copyright (c) 2011 Zolertia(TM) is a trademark by Advancare,SL
3  * All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  * 1. Redistributions of source code must retain the above copyright
9  * notice, this list of conditions and the following disclaimer.
10  * 2. Redistributions in binary form must reproduce the above copyright
11  * notice, this list of conditions and the following disclaimer in the
12  * documentation and/or other materials provided with the distribution.
13  * 3. Neither the name of the Institute nor the names of its contributors
14  * may be used to endorse or promote products derived from this software
15  * without specific prior written permission.
16  *
17  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20  * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27  * SUCH DAMAGE.
28  *
29  *
30  * -----------------------------------------------------------------
31  *
32  * Author : Enric M. Calvo (based on work by A. Dunkels, J. Eriksson, N. Finne)
33  * Created : 2011-02-22
34  * $Revision: 1.0 $
35  */
36 
37 #include "dev/potentiometer-sensor.h"
38 #include "dev/sky-sensors.h"
39 #include "contiki.h"
40 
41 /* Configure ADC12_2 to sample channel 11 (voltage) and use */
42 /* the Vref+ as reference (SREF_1) since it is a stable reference */
43 #define INPUT_CHANNEL (1 << INCH_4)
44 #define INPUT_REFERENCE SREF_0
45 #define POTENTIOMETER_MEM ADC12MEM4
46 
47 const struct sensors_sensor potentiometer_sensor;
48 /*---------------------------------------------------------------------------*/
49 static int
50 value(int type)
51 {
52  return POTENTIOMETER_MEM;
53 }
54 /*---------------------------------------------------------------------------*/
55 static int
56 configure(int type, int c)
57 {
58  return sky_sensors_configure(INPUT_CHANNEL, INPUT_REFERENCE, type, c);
59 }
60 /*---------------------------------------------------------------------------*/
61 static int
62 status(int type)
63 {
64  return sky_sensors_status(INPUT_CHANNEL, type);
65 }
66 /*---------------------------------------------------------------------------*/
67 SENSORS_SENSOR(potentiometer_sensor, POTENTIOMETER_SENSOR, value, configure, status);