contiki/platform/sky/dev/battery-sensor.c
2010-01-15 21:37:15 +00:00

110 lines
3.5 KiB
C

/*
* Copyright (c) 2006, Swedish Institute of Computer Science.
* 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.
*
* $Id: battery-sensor.c,v 1.7 2010/01/15 21:37:15 nifi Exp $
*
* -----------------------------------------------------------------
*
* Author : Adam Dunkels, Joakim Eriksson, Niclas Finne
* Created : 2005-11-01
* Updated : $Date: 2010/01/15 21:37:15 $
* $Revision: 1.7 $
*/
#include "dev/battery-sensor.h"
#include <io.h>
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 */
/* (in the case of the sky platform it is sensors_light_init that does it) */
P6SEL |= 0x80;
P6DIR = 0xff;
P6OUT = 0x00;
/* stop converting immediately */
ADC12CTL0 &= ~ENC;
ADC12CTL1 &= ~CONSEQ_3;
/* Configure ADC12_2 to sample channel 11 (voltage) and use */
/* the Vref+ as reference (SREF_1) since it is a stable reference */
ADC12MCTL2 = (INCH_11 + SREF_1);
ADC12CTL1 |= CONSEQ_3;
ADC12CTL0 |= ENC | ADC12SC;
/* Irq_adc12_activate(&battery_sensor, 6, (INCH_11 + SREF_1)); */
active = 1;
}
/*---------------------------------------------------------------------------*/
static void
deactivate(void)
{
active = 0;
}
/*---------------------------------------------------------------------------*/
static int
value(int type)
{
return ADC12MEM2/*battery_value*/;
}
/*---------------------------------------------------------------------------*/
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);