vib-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: vib-sensor.c,v 1.5 2010/02/08 00:00:45 nifi Exp $
00032  */
00033 
00034 #include "dev/vib-sensor.h"
00035 #include "dev/irq.h"
00036 #include "dev/hwconf.h"
00037 
00038 const struct sensors_sensor vib_sensor;
00039 
00040 static unsigned int vib;
00041 
00042 #define VIB_IRQ() 4
00043 HWCONF_PIN(VIB, 1, VIB_IRQ());
00044 HWCONF_IRQ(VIB, 1, VIB_IRQ());
00045 
00046 /*---------------------------------------------------------------------------*/
00047 static int
00048 irq(void)
00049 {
00050   ++vib;
00051   sensors_changed(&vib_sensor);
00052   return 1;
00053 }
00054 /*---------------------------------------------------------------------------*/
00055 static int
00056 value(int type)
00057 {
00058   return vib;
00059 }
00060 /*---------------------------------------------------------------------------*/
00061 static int
00062 configure(int type, int value)
00063 {
00064   switch(type) {
00065   case SENSORS_HW_INIT:
00066     vib = 0;
00067     VIB_SELECT();
00068     VIB_MAKE_INPUT();
00069     return 1;
00070   case SENSORS_ACTIVE:
00071     if(value) {
00072       if(!VIB_IRQ_ENABLED()) {
00073         irq_port1_activate(VIB_IRQ(), irq);
00074         VIB_ENABLE_IRQ();
00075       }
00076     } else {
00077       VIB_DISABLE_IRQ();
00078       irq_port1_deactivate(VIB_IRQ());
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 VIB_IRQ_ENABLED();
00092   }
00093   return 0;
00094 }
00095 /*---------------------------------------------------------------------------*/
00096 SENSORS_SENSOR(vib_sensor, VIB_SENSOR,
00097                value, configure, status);

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