osd-contiki/platform/iris/dev/sensors/mts300.c

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2011-06-04 14:42:19 +02:00
/*
* Copyright (c) 2009, University of Colombo School of Computing
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* This file is part of the Contiki operating system.
*
* @(#)$$
*/
/**
* \file
* Device drivers implementation for MTS300 sensor board.
* \author
* Kasun Hewage <kasun.ch@gmail.com>
*/
#include "mts300.h"
/*---------------------------------------------------------------------------*/
void
sounder_on()
{ SOUNDER_DDR |= SOUNDER_MASK;
SOUNDER_PORT &= ~SOUNDER_MASK;
SOUNDER_PORT |= SOUNDER_MASK;
}
/*---------------------------------------------------------------------------*/
void
sounder_off()
{
SOUNDER_PORT &= ~(SOUNDER_MASK);
SOUNDER_DDR &= ~(SOUNDER_MASK);
}
/*---------------------------------------------------------------------------*/
void
adc_init()
{
ADMUX = 0;
/* AVCC with external capacitor at AREF pin. */
//ADMUX |= _BV(REFS0)
/* Disable ADC interrupts. */
ADCSRA &= ~( _BV(ADIE) | _BV(ADIF) );
/* Set ADC prescaler to 64 and clear interrupt flag. */
ADCSRA |= _BV(ADPS2) | _BV(ADPS1) | _BV(ADIE);
}
/*---------------------------------------------------------------------------*/
/* Poll based approach. The interrupt based adc is currently not used.
The ADC result is right adjusted. First 8 bits(from left) are in ADCL and
other two bits are in ADCH. See Atmega128 datasheet page 228. */
uint16_t
get_adc(int channel)
{
uint16_t reading;
ADMUX |= (channel & 0x1F);
/* Disable ADC interrupts. */
ADCSRA &= ~_BV(ADIE);
/* Clear previous interrupts. */
ADCSRA |= _BV(ADIF);
/* Enable ADC and start conversion. */
ADCSRA |= _BV(ADEN) | _BV(ADSC);
/* Wait until conversion is completed. */
while ( ADCSRA & _BV(ADSC) );
/* Get first 8 bits. */
reading = ADCL;
/* Get last two bits. */
reading |= (ADCH & 3) << 8;
/* Disable ADC. */
ADCSRA &= ~_BV(ADEN);
return reading;
}
/*---------------------------------------------------------------------------*/
uint16_t
get_light()
{
uint16_t reading;
/* Enable light sensor. */
LIGHT_PORT |= LIGHT_PIN_MASK;
LIGHT_PORT_DDR |= LIGHT_PIN_MASK;
/* Disable temperature sensor. */
TEMP_PORT_DDR &= ~TEMP_PIN_MASK;
TEMP_PORT &= ~TEMP_PIN_MASK;
/* Read ADC. */
reading = get_adc(LIGHT_ADC_CHANNEL);
/* Disable light sensor. */
LIGHT_PORT &= ~LIGHT_PIN_MASK;
LIGHT_PORT_DDR &= ~LIGHT_PIN_MASK;
return reading;
}
/*---------------------------------------------------------------------------*/
uint16_t
get_temp()
{
uint16_t reading;
/* Disable light sensor. */
LIGHT_PORT &= ~LIGHT_PIN_MASK;
LIGHT_PORT_DDR &= ~LIGHT_PIN_MASK;
/* Enable temperature sensor. */
TEMP_PORT_DDR |= TEMP_PIN_MASK;
TEMP_PORT |= TEMP_PIN_MASK;
/* Read ADC. */
reading = get_adc(TEMP_ADC_CHANNEL);
/* Disable temperature sensor. */
TEMP_PORT_DDR &= ~TEMP_PIN_MASK;
TEMP_PORT &= ~TEMP_PIN_MASK;
return reading;
}
/*---------------------------------------------------------------------------*/
uint16_t
get_accx()
{
uint16_t reading;
/* Enable accelerometer. */
ACCEL_PORT_DDR |= ACCEL_PIN_MASK;
ACCEL_PORT |= ACCEL_PIN_MASK;
/* Read ADC. */
reading = get_adc(ACCELX_ADC_CHANNEL);
/* Enable accelerometer. */
ACCEL_PORT_DDR &= ~ACCEL_PIN_MASK;
ACCEL_PORT &= ~ACCEL_PIN_MASK;
return reading;
}
/*---------------------------------------------------------------------------*/
uint16_t
get_accy()
{
uint16_t reading;
/* Enable accelerometer. */
ACCEL_PORT_DDR |= ACCEL_PIN_MASK;
ACCEL_PORT |= ACCEL_PIN_MASK;
/* Read ADC. */
reading = get_adc(ACCELY_ADC_CHANNEL);
/* Enable accelerometer. */
ACCEL_PORT_DDR &= ~ACCEL_PIN_MASK;
ACCEL_PORT &= ~ACCEL_PIN_MASK;
return reading;
}
/*---------------------------------------------------------------------------*/
uint16_t
get_magx()
{
uint16_t reading;
/* Enable magnetometer. */
MAGNET_PORT_DDR |= MAGNET_PIN_MASK;
MAGNET_PORT |= MAGNET_PIN_MASK;
/* Read ADC. */
reading = get_adc(MAGNETX_ADC_CHANNEL);
/* Enable magnetometer. */
MAGNET_PORT_DDR &= ~MAGNET_PIN_MASK;
MAGNET_PORT &= ~MAGNET_PIN_MASK;
return reading;
}
/*---------------------------------------------------------------------------*/
uint16_t
get_magy()
{
uint16_t reading;
/* Enable magnetometer. */
MAGNET_PORT_DDR |= MAGNET_PIN_MASK;
MAGNET_PORT |= MAGNET_PIN_MASK;
/* Read ADC. */
reading = get_adc(MAGNETY_ADC_CHANNEL);
/* Enable magnetometer. */
MAGNET_PORT_DDR &= ~MAGNET_PIN_MASK;
MAGNET_PORT &= ~MAGNET_PIN_MASK;
return reading;
}
/*---------------------------------------------------------------------------*/
uint16_t
get_mic()
{
uint16_t reading;
/* Enable mic. */
MIC_PORT_DDR |= MIC_PIN_MASK;
MIC_PORT |= MIC_PIN_MASK;
/* Read ADC. */
reading = get_adc(MIC_ADC_CHANNEL);
/* Enable mic. */
MIC_PORT_DDR &= ~MIC_PIN_MASK;
MIC_PORT &= ~MIC_PIN_MASK;
return reading;
}
/*---------------------------------------------------------------------------*/