Contiki 2.6

button-sensor.c

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00001 /*
00002  * Copyright (c) 2010, STMicroelectronics.
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
00011  *    copyright notice, this list of conditions and the following
00012  *    disclaimer in the documentation and/or other materials provided
00013  *    with the distribution.
00014  * 3. The name of the author may not be used to endorse or promote
00015  *    products derived from this software without specific prior
00016  *    written permission.
00017  *
00018  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
00019  * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
00020  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
00021  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
00022  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
00023  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
00024  * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
00025  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
00026  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
00027  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
00028  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
00029  *
00030  * This file is part of the Contiki OS
00031  *
00032  * $Id: button-sensor.c,v 1.1 2010/10/25 09:03:39 salvopitru Exp $
00033  */
00034 /*---------------------------------------------------------------------------*/
00035 /**
00036 * \file
00037 *                       Button sensor.
00038 * \author
00039 *                       Salvatore Pitrulli <salvopitru@users.sourceforge.net>
00040 */
00041 /*---------------------------------------------------------------------------*/
00042 
00043 #include "dev/button-sensor.h"
00044 #include "hal.h"
00045 #include "hal/micro/micro-common.h"
00046 #include "hal/micro/cortexm3/micro-common.h"
00047 
00048 #include BOARD_HEADER
00049 
00050 #define DEBOUNCE 1
00051 
00052 #if DEBOUNCE
00053 static struct timer debouncetimer;
00054 #endif
00055 
00056 #define FALSE 0
00057 #define TRUE  1
00058 
00059 uint8_t button_flags = 0;
00060 
00061 #define BUTTON_ACTIVE_FLG 0x01
00062 #define BUTTON_PRESSED_FLG 0x02
00063 
00064 #define BUTTON_HAS_BEEN_PRESSED() (button_flags & BUTTON_PRESSED_FLG)
00065 #define BUTTON_HAS_BEEN_RELEASED() (!(button_flags & BUTTON_PRESSED_FLG))
00066 #define BUTTON_SET_PRESSED() (button_flags |= BUTTON_PRESSED_FLG)
00067 #define BUTTON_SET_RELEASED() (button_flags &= ~BUTTON_PRESSED_FLG)
00068 
00069 /*---------------------------------------------------------------------------*/
00070 static void
00071 init(void)
00072 {
00073   #if DEBOUNCE
00074   timer_set(&debouncetimer, 0);
00075   #endif
00076   
00077   /* Configure GPIO for BUTTONSs */
00078   halInitButton();
00079   
00080 }
00081 /*---------------------------------------------------------------------------*/
00082 static void
00083 activate(void)
00084 {
00085   button_flags |= BUTTON_ACTIVE_FLG;
00086 }
00087 /*---------------------------------------------------------------------------*/
00088 static void
00089 deactivate(void)
00090 {
00091   button_flags &= ~BUTTON_ACTIVE_FLG;
00092 }
00093 /*---------------------------------------------------------------------------*/
00094 static int
00095 active(void)
00096 {
00097   return (button_flags & BUTTON_ACTIVE_FLG)? 1 : 0;
00098 }
00099 /*---------------------------------------------------------------------------*/
00100 static int
00101 value(int type)
00102 {
00103   if(!active()){
00104     return 0;
00105   }
00106 
00107 
00108 #if DEBOUNCE
00109   if(timer_expired(&debouncetimer)) {
00110 
00111     if(halGetButtonStatus(BUTTON_S1) == BUTTON_PRESSED){
00112 
00113       timer_set(&debouncetimer, CLOCK_SECOND / 10);
00114       if(BUTTON_HAS_BEEN_RELEASED()){ // Button has been previously released.
00115         sensors_changed(&button_sensor);
00116       }
00117       BUTTON_SET_PRESSED();
00118 
00119       return 1;
00120     }
00121     else {
00122       BUTTON_SET_RELEASED();
00123       return 0;
00124     }
00125   }
00126   else {
00127     return 0;
00128   }
00129 #else
00130   if(halGetButtonStatus(BUTTON_S1) == BUTTON_PRESSED){
00131     sensors_changed(&button_sensor);
00132     return 1;
00133   }
00134   else {
00135     return 0;
00136   }
00137 #endif
00138 
00139 }
00140 /*---------------------------------------------------------------------------*/
00141 static int
00142 configure(int type, int value)
00143 {
00144   switch(type){
00145     case SENSORS_HW_INIT:
00146       init();
00147       return 1;
00148     case SENSORS_ACTIVE:
00149       if(value)        
00150         activate();
00151       else
00152         deactivate();
00153       return 1;
00154   }
00155        
00156   return 0;
00157 }
00158 /*---------------------------------------------------------------------------*/
00159 static int
00160 status(int type)
00161 {
00162   switch(type) {
00163     
00164     case SENSORS_READY:
00165       return active();
00166   }
00167   
00168   return 0;
00169 }
00170 /*---------------------------------------------------------------------------*/
00171 #if 0
00172 void BUTTON_S1_ISR(void)
00173 {
00174   
00175   ENERGEST_ON(ENERGEST_TYPE_IRQ);
00176   
00177   //sensors_handle_irq(IRQ_BUTTON);
00178   
00179    if(INT_GPIOFLAG & BUTTON_S1_FLAG_BIT) {
00180     
00181 #if DEBOUNCE
00182     if(timer_expired(&debouncetimer)) {
00183       timer_set(&debouncetimer, CLOCK_SECOND / 5);
00184       sensors_changed(&button_sensor);
00185     }
00186 #else
00187     sensors_changed(&button_sensor);
00188 #endif
00189     
00190   }
00191   
00192   INT_GPIOFLAG = BUTTON_S1_FLAG_BIT;  
00193   
00194   ENERGEST_OFF(ENERGEST_TYPE_IRQ);  
00195 }
00196 #endif
00197 /*---------------------------------------------------------------------------*/
00198 SENSORS_SENSOR(button_sensor, BUTTON_SENSOR,
00199                value, configure, status);
00200