Contiki 2.6
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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: button-sensor.c,v 1.4 2010/01/14 20:01:19 nifi Exp $ 00032 */ 00033 #include "contiki.h" 00034 #include "lib/sensors.h" 00035 #include "dev/hwconf.h" 00036 #include "dev/button-sensor.h" 00037 #include "isr_compat.h" 00038 00039 const struct sensors_sensor button_sensor; 00040 00041 static struct timer debouncetimer; 00042 static int status(int type); 00043 00044 HWCONF_PIN(BUTTON, 2, 7); 00045 HWCONF_IRQ(BUTTON, 2, 7); 00046 00047 /*---------------------------------------------------------------------------*/ 00048 ISR(PORT2, irq_p2) 00049 { 00050 ENERGEST_ON(ENERGEST_TYPE_IRQ); 00051 00052 if(BUTTON_CHECK_IRQ()) { 00053 if(timer_expired(&debouncetimer)) { 00054 timer_set(&debouncetimer, CLOCK_SECOND / 4); 00055 sensors_changed(&button_sensor); 00056 LPM4_EXIT; 00057 } 00058 } 00059 P2IFG = 0x00; 00060 ENERGEST_OFF(ENERGEST_TYPE_IRQ); 00061 } 00062 /*---------------------------------------------------------------------------*/ 00063 static int 00064 value(int type) 00065 { 00066 return BUTTON_READ() || !timer_expired(&debouncetimer); 00067 } 00068 /*---------------------------------------------------------------------------*/ 00069 static int 00070 configure(int type, int c) 00071 { 00072 switch (type) { 00073 case SENSORS_ACTIVE: 00074 if (c) { 00075 if(!status(SENSORS_ACTIVE)) { 00076 timer_set(&debouncetimer, 0); 00077 BUTTON_IRQ_EDGE_SELECTD(); 00078 00079 BUTTON_SELECT(); 00080 BUTTON_MAKE_INPUT(); 00081 00082 BUTTON_ENABLE_IRQ(); 00083 } 00084 } else { 00085 BUTTON_DISABLE_IRQ(); 00086 } 00087 return 1; 00088 } 00089 return 0; 00090 } 00091 /*---------------------------------------------------------------------------*/ 00092 static int 00093 status(int type) 00094 { 00095 switch (type) { 00096 case SENSORS_ACTIVE: 00097 case SENSORS_READY: 00098 return BUTTON_IRQ_ENABLED(); 00099 } 00100 return 0; 00101 } 00102 /*---------------------------------------------------------------------------*/ 00103 SENSORS_SENSOR(button_sensor, BUTTON_SENSOR, 00104 value, configure, status);