mts300.c

Go to the documentation of this file.
00001 /*
00002  * Copyright (c) 2009, 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 
00034 /**
00035  * \file
00036  *         Device drivers implementation for MTS300 sensor board.
00037  * \author
00038  *         Kasun Hewage <kasun.ch@gmail.com>
00039  */
00040 
00041 #include "mts300.h"
00042 /*---------------------------------------------------------------------------*/
00043 void
00044 sounder_on()
00045 {
00046   SOUNDER_DDR |= SOUNDER_MASK;
00047   SOUNDER_PORT &= ~SOUNDER_MASK;
00048   SOUNDER_PORT |= SOUNDER_MASK;
00049 }
00050 /*---------------------------------------------------------------------------*/
00051 void 
00052 sounder_off()
00053 {
00054   SOUNDER_PORT &= ~(SOUNDER_MASK);
00055   SOUNDER_DDR &= ~(SOUNDER_MASK);
00056 }
00057 /*---------------------------------------------------------------------------*/
00058 void 
00059 adc_init()
00060 {
00061   ADMUX = 0;
00062   /* AVCC with external capacitor at AREF pin. */
00063   //ADMUX |= _BV(REFS0)
00064   /* Disable ADC interrupts. */   
00065   ADCSRA &= ~( _BV(ADIE) | _BV(ADIF) );
00066   /* Set ADC prescaler to 64 and clear interrupt flag. */
00067   ADCSRA |= _BV(ADPS2) | _BV(ADPS1) | _BV(ADIE);
00068   
00069 }
00070 /*---------------------------------------------------------------------------*/
00071 /* Poll based approach. The interrupt based adc is currently not used.
00072    The ADC result is right adjusted. First 8 bits(from left) are in ADCL and
00073    other two bits are in ADCH. See Atmega128 datasheet page 228. */
00074 uint16_t 
00075 get_adc(int channel)
00076 {
00077   uint16_t reading;
00078 
00079   ADMUX |= (channel & 0x1F);
00080 
00081   /* Disable ADC interrupts. */
00082   ADCSRA &= ~_BV(ADIE);
00083   /* Clear previous interrupts. */
00084   ADCSRA |= _BV(ADIF);
00085   /* Enable ADC and start conversion. */
00086   ADCSRA |= _BV(ADEN) | _BV(ADSC);
00087   /* Wait until conversion is completed. */
00088   while ( ADCSRA & _BV(ADSC) );
00089   /* Get first 8 bits.  */
00090   reading = ADCL;
00091   /* Get last two bits. */
00092   reading |= (ADCH & 3) << 8;
00093   /* Disable ADC. */
00094   ADCSRA &= ~_BV(ADEN);
00095   return reading;
00096 }
00097 /*---------------------------------------------------------------------------*/
00098 uint16_t 
00099 get_light()
00100 {
00101   uint16_t reading;
00102 
00103   /* Enable light sensor. */
00104   LIGHT_PORT |= LIGHT_PIN_MASK;       
00105   LIGHT_PORT_DDR |= LIGHT_PIN_MASK;
00106   /* Disable temperature sensor. */
00107   TEMP_PORT_DDR &= ~TEMP_PIN_MASK;
00108   TEMP_PORT &= ~TEMP_PIN_MASK;
00109   /* Read ADC. */
00110   reading = get_adc(LIGHT_ADC_CHANNEL);
00111   /* Disable light sensor. */
00112   LIGHT_PORT &= ~LIGHT_PIN_MASK;       
00113   LIGHT_PORT_DDR &= ~LIGHT_PIN_MASK;
00114     return reading;
00115 }
00116 /*---------------------------------------------------------------------------*/
00117 uint16_t 
00118 get_temp()
00119 {
00120   uint16_t reading;
00121 
00122   /* Disable light sensor. */
00123   LIGHT_PORT &= ~LIGHT_PIN_MASK;       
00124   LIGHT_PORT_DDR &= ~LIGHT_PIN_MASK;
00125   /* Enable temperature sensor. */
00126   TEMP_PORT_DDR |= TEMP_PIN_MASK;
00127   TEMP_PORT |= TEMP_PIN_MASK;
00128   /* Read ADC. */
00129   reading = get_adc(TEMP_ADC_CHANNEL);
00130   /* Disable temperature sensor. */
00131   TEMP_PORT_DDR &= ~TEMP_PIN_MASK;
00132   TEMP_PORT &= ~TEMP_PIN_MASK;
00133 
00134   return reading;
00135 }
00136 /*---------------------------------------------------------------------------*/
00137 uint16_t 
00138 get_accx()
00139 {
00140   uint16_t reading;
00141 
00142   /* Enable accelerometer. */
00143   ACCEL_PORT_DDR |= ACCEL_PIN_MASK;
00144   ACCEL_PORT |= ACCEL_PIN_MASK;
00145   /* Read ADC. */
00146   reading = get_adc(ACCELX_ADC_CHANNEL);
00147   /* Enable accelerometer. */
00148   ACCEL_PORT_DDR &= ~ACCEL_PIN_MASK;
00149   ACCEL_PORT &= ~ACCEL_PIN_MASK;
00150 
00151   return reading;
00152 }
00153 /*---------------------------------------------------------------------------*/
00154 uint16_t 
00155 get_accy()
00156 {
00157   uint16_t reading;
00158 
00159   /* Enable accelerometer. */
00160   ACCEL_PORT_DDR |= ACCEL_PIN_MASK;
00161   ACCEL_PORT |= ACCEL_PIN_MASK;
00162   /* Read ADC. */
00163   reading = get_adc(ACCELY_ADC_CHANNEL);
00164   /* Enable accelerometer. */
00165   ACCEL_PORT_DDR &= ~ACCEL_PIN_MASK;
00166   ACCEL_PORT &= ~ACCEL_PIN_MASK;
00167 
00168   return reading;
00169 }
00170 /*---------------------------------------------------------------------------*/
00171 uint16_t 
00172 get_magx()
00173 {
00174   uint16_t reading;
00175 
00176   /* Enable magnetometer. */
00177   MAGNET_PORT_DDR |= MAGNET_PIN_MASK;
00178   MAGNET_PORT |= MAGNET_PIN_MASK;
00179   /* Read ADC. */
00180   reading = get_adc(MAGNETX_ADC_CHANNEL);
00181   /* Enable magnetometer. */
00182   MAGNET_PORT_DDR &= ~MAGNET_PIN_MASK;
00183   MAGNET_PORT &= ~MAGNET_PIN_MASK;
00184 
00185   return reading;
00186 }
00187 /*---------------------------------------------------------------------------*/
00188 uint16_t 
00189 get_magy()
00190 {
00191   uint16_t reading;
00192 
00193   /* Enable magnetometer. */
00194   MAGNET_PORT_DDR |= MAGNET_PIN_MASK;
00195   MAGNET_PORT |= MAGNET_PIN_MASK;
00196   /* Read ADC. */
00197   reading = get_adc(MAGNETY_ADC_CHANNEL);
00198   /* Enable magnetometer. */
00199   MAGNET_PORT_DDR &= ~MAGNET_PIN_MASK;
00200   MAGNET_PORT &= ~MAGNET_PIN_MASK;
00201 
00202   return reading;
00203 }
00204 /*---------------------------------------------------------------------------*/
00205 uint16_t 
00206 get_mic()
00207 {
00208   uint16_t reading;
00209 
00210     /* Enable mic. */
00211   MIC_PORT_DDR |= MIC_PIN_MASK;
00212   MIC_PORT |= MIC_PIN_MASK;
00213   /* Read ADC. */
00214   reading = get_adc(MIC_ADC_CHANNEL);
00215   /* Enable mic. */
00216   MIC_PORT_DDR &= ~MIC_PIN_MASK;
00217   MIC_PORT &= ~MIC_PIN_MASK;
00218 
00219   return reading;
00220 }
00221 /*---------------------------------------------------------------------------*/
00222 

Generated on Mon Apr 11 14:23:44 2011 for Contiki 2.5 by  doxygen 1.6.1