123 lines
3.6 KiB
C
123 lines
3.6 KiB
C
/*
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* Copyright (c) 2010, Swedish Institute of Computer Science.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $Id: acc-sensor.c,v 1.7 2010/03/15 23:37:01 nifi Exp $
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*
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* -----------------------------------------------------------------
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*
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* Author : Adam Dunkels, Joakim Eriksson, Niclas Finne
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* Created : 2005-11-01
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* Updated : $Date: 2010/03/15 23:37:01 $
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* $Revision: 1.7 $
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*/
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#include "dev/acc-sensor.h"
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#include "dev/sky-sensors.h"
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#include <io.h>
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const struct sensors_sensor acc_sensor;
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static uint8_t active;
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/*---------------------------------------------------------------------------*/
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static void
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activate(void)
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{
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P2DIR |= 0x48;
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P2OUT |= 0x48;
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/* stop converting immediately */
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ADC12CTL0 &= ~ENC;
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ADC12CTL1 &= ~CONSEQ_3;
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while(ADC12CTL1 & ADC12BUSY);
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/* Configure ADC12_2 to sample channel 4, 5, 6 and use */
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/* the Vref+ as reference (SREF_1) since it is a stable reference */
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ADC12MCTL2 = (INCH_4 + SREF_1);
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ADC12MCTL3 = (INCH_5 + SREF_1);
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ADC12MCTL4 = (INCH_6 + SREF_1);
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/* internal temperature can be read as value(3) */
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ADC12MCTL5 = (INCH_10 + SREF_1);
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active = 1;
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sky_sensors_activate(0x70);
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}
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/*---------------------------------------------------------------------------*/
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static void
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deactivate(void)
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{
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sky_sensors_deactivate(0x70);
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active = 0;
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}
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/*---------------------------------------------------------------------------*/
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static int
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value(int type)
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{
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switch(type) {
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case 0:
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return ADC12MEM2;
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case 1:
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return ADC12MEM3;
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case 2:
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return ADC12MEM4;
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case 3:
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return ADC12MEM5;
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}
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return 0;
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}
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/*---------------------------------------------------------------------------*/
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static int
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configure(int type, int c)
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{
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switch(type) {
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case SENSORS_ACTIVE:
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if (c) {
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if(!active) {
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activate();
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}
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} else if(active) {
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deactivate();
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}
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}
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return 0;
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}
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/*---------------------------------------------------------------------------*/
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static int
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status(int type)
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{
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switch (type) {
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case SENSORS_ACTIVE:
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case SENSORS_READY:
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return active;
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}
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return 0;
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}
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/*---------------------------------------------------------------------------*/
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SENSORS_SENSOR(acc_sensor, ACC_SENSOR,
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value, configure, status);
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