Contiki 2.6
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00001 /* 00002 * Copyright (c) 2010, University of Colombo School of Computing. 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 00032 /** 00033 * \file 00034 * Battery sensor driver. 00035 * \author 00036 * Kasun Hewage <kasun.ch@gmail.com> 00037 */ 00038 00039 #include <avr/io.h> 00040 #include "dev/battery-sensor.h" 00041 #include "dev/adc.h" 00042 00043 00044 #define BAT_MONITOR_PORT PORTF 00045 #define BAT_MONITOR_PIN_MASK _BV(1) 00046 #define BAT_MONITOR_PORT_DDR DDRF 00047 #define BAT_MONITOR_ADC_CHANNEL 30 00048 00049 const struct sensors_sensor battery_sensor; 00050 static uint8_t active; 00051 /*---------------------------------------------------------------------------*/ 00052 static void 00053 activate(void) 00054 { 00055 /* This assumes that some other sensor system already did setup the ADC */ 00056 adc_init(); 00057 00058 /* Enable battery sensor. */ 00059 BAT_MONITOR_PORT |= BAT_MONITOR_PIN_MASK; 00060 BAT_MONITOR_PORT_DDR |= BAT_MONITOR_PIN_MASK; 00061 00062 active = 1; 00063 } 00064 /*---------------------------------------------------------------------------*/ 00065 static void 00066 deactivate(void) 00067 { 00068 active = 0; 00069 } 00070 /*---------------------------------------------------------------------------*/ 00071 static int 00072 value(int type) 00073 { 00074 return get_adc(BAT_MONITOR_ADC_CHANNEL); 00075 } 00076 /*---------------------------------------------------------------------------*/ 00077 static int 00078 configure(int type, int c) 00079 { 00080 switch(type) { 00081 case SENSORS_ACTIVE: 00082 if (c) { 00083 activate(); 00084 } else { 00085 deactivate(); 00086 } 00087 } 00088 return 0; 00089 } 00090 /*---------------------------------------------------------------------------*/ 00091 static int 00092 status(int type) 00093 { 00094 switch (type) { 00095 case SENSORS_ACTIVE: 00096 case SENSORS_READY: 00097 return active; 00098 } 00099 return 0; 00100 } 00101 /*---------------------------------------------------------------------------*/ 00102 SENSORS_SENSOR(battery_sensor, BATTERY_SENSOR, 00103 value, configure, status);