Contiki 2.6
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00001 /* 00002 * Copyright (c) 2006, 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 * $Id: button-sensor.c,v 1.6 2010/01/14 19:12:31 nifi Exp $ 00030 */ 00031 00032 #include "lib/sensors.h" 00033 #include "dev/button-sensor.h" 00034 #include "lib/simEnvChange.h" 00035 00036 const struct simInterface button_interface; 00037 const struct sensors_sensor button_sensor; 00038 static struct timer debouncetimer; 00039 00040 // COOJA variables 00041 char simButtonChanged; 00042 char simButtonIsDown; 00043 char simButtonIsActive; 00044 /*---------------------------------------------------------------------------*/ 00045 static int 00046 value(int type) 00047 { 00048 return simButtonIsDown || !timer_expired(&debouncetimer); 00049 } 00050 /*---------------------------------------------------------------------------*/ 00051 static int 00052 configure(int type, int c) 00053 { 00054 if(type == SENSORS_ACTIVE) { 00055 simButtonIsActive = c; 00056 return 1; 00057 } else if(type == SENSORS_HW_INIT) { 00058 simButtonIsActive = 1; 00059 timer_set(&debouncetimer, 0); 00060 return 1; 00061 } 00062 return 0; 00063 } 00064 /*---------------------------------------------------------------------------*/ 00065 static int 00066 status(int type) 00067 { 00068 return (type == SENSORS_ACTIVE) ? simButtonIsActive : 0; 00069 } 00070 /*---------------------------------------------------------------------------*/ 00071 static void 00072 doInterfaceActionsBeforeTick(void) 00073 { 00074 // Check if button value has changed 00075 if(simButtonChanged && simButtonIsActive && simButtonIsDown) { 00076 if(timer_expired(&debouncetimer)) { 00077 timer_set(&debouncetimer, CLOCK_SECOND / 10); 00078 sensors_changed(&button_sensor); 00079 } 00080 } 00081 simButtonChanged = 0; 00082 } 00083 /*---------------------------------------------------------------------------*/ 00084 static void 00085 doInterfaceActionsAfterTick(void) 00086 { 00087 } 00088 /*---------------------------------------------------------------------------*/ 00089 00090 SIM_INTERFACE(button_interface, 00091 doInterfaceActionsBeforeTick, 00092 doInterfaceActionsAfterTick); 00093 00094 SENSORS_SENSOR(button_sensor, BUTTON_SENSOR, 00095 value, configure, status);