osd-contiki/platform/jcreate/dev/acc-sensor.c

122 lines
3.6 KiB
C

/*
* Copyright (c) 2010, 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: acc-sensor.c,v 1.1 2010/05/03 21:57:35 nifi Exp $
*
* -----------------------------------------------------------------
*
* Author : Adam Dunkels, Joakim Eriksson, Niclas Finne
* Created : 2005-11-01
* Updated : $Date: 2010/05/03 21:57:35 $
* $Revision: 1.1 $
*/
#include "dev/acc-sensor.h"
#include "dev/sky-sensors.h"
#include <io.h>
const struct sensors_sensor acc_sensor;
static uint8_t active;
/*---------------------------------------------------------------------------*/
static void
activate(void)
{
P2DIR |= 0x48;
P2OUT |= 0x48;
/* stop converting immediately */
ADC12CTL0 &= ~ENC;
ADC12CTL1 &= ~CONSEQ_3;
while(ADC12CTL1 & ADC12BUSY);
/* Configure ADC12_2 to sample channel 4, 5, 6 and use */
/* the Vref+ as reference (SREF_1) since it is a stable reference */
ADC12MCTL2 = (INCH_4 + SREF_1);
ADC12MCTL3 = (INCH_5 + SREF_1);
ADC12MCTL4 = (INCH_6 + SREF_1);
/* internal temperature can be read as value(3) */
ADC12MCTL5 = (INCH_10 + SREF_1);
active = 1;
sky_sensors_activate(0x70);
}
/*---------------------------------------------------------------------------*/
static void
deactivate(void)
{
sky_sensors_deactivate(0x70);
active = 0;
}
/*---------------------------------------------------------------------------*/
static int
value(int type)
{
switch(type) {
case 0:
return ADC12MEM2;
case 1:
return ADC12MEM3;
case 2:
return ADC12MEM4;
case 3:
return ADC12MEM5;
}
return 0;
}
/*---------------------------------------------------------------------------*/
static int
configure(int type, int c)
{
switch(type) {
case SENSORS_ACTIVE:
if (c) {
if(!active) {
activate();
}
} else if(active) {
deactivate();
}
}
return 0;
}
/*---------------------------------------------------------------------------*/
static int
status(int type)
{
switch (type) {
case SENSORS_ACTIVE:
case SENSORS_READY:
return active;
}
return 0;
}
/*---------------------------------------------------------------------------*/
SENSORS_SENSOR(acc_sensor, ACC_SENSOR, value, configure, status);