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Adding battery sensor

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kasunch 2010-02-24 09:05:40 +00:00
parent ea53e5b845
commit 0c9612b7b9
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platform/micaz/dev/sensors/battery-sensor.c Executable file
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/*
* Copyright (c) 2010, 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
* Battery sensor driver.
* \author
* Kasun Hewage <kasun.ch@gmail.com>
*/
#include <avr/io.h>
#include "dev/battery-sensor.h"
#include "dev/adc.h"
#define BAT_MONITOR_PORT PORTF
#define BAT_MONITOR_PIN_MASK _BV(1)
#define BAT_MONITOR_PORT_DDR DDRF
#define BAT_MONITOR_ADC_CHANNEL 30
const struct sensors_sensor battery_sensor;
static uint8_t active;
/*---------------------------------------------------------------------------*/
static void
activate(void)
{
/* This assumes that some other sensor system already did setup the ADC */
adc_init();
/* Enable battery sensor. */
BAT_MONITOR_PORT |= BAT_MONITOR_PIN_MASK;
BAT_MONITOR_PORT_DDR |= BAT_MONITOR_PIN_MASK;
active = 1;
}
/*---------------------------------------------------------------------------*/
static void
deactivate(void)
{
active = 0;
}
/*---------------------------------------------------------------------------*/
static int
value(int type)
{
return get_adc(BAT_MONITOR_ADC_CHANNEL);
}
/*---------------------------------------------------------------------------*/
static int
configure(int type, int c)
{
switch(type) {
case SENSORS_ACTIVE:
if (c) {
activate();
} else {
deactivate();
}
}
return 0;
}
/*---------------------------------------------------------------------------*/
static int
status(int type)
{
switch (type) {
case SENSORS_ACTIVE:
case SENSORS_READY:
return active;
}
return 0;
}
/*---------------------------------------------------------------------------*/
SENSORS_SENSOR(battery_sensor, BATTERY_SENSOR,
value, configure, status);