contiki/platform/sky/dev/ext-sensor.c

150 lines
4.7 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: ext-sensor.c,v 1.1 2009/08/25 16:24:49 adamdunkels Exp $
*
* -----------------------------------------------------------------
*
* Author : Adam Dunkels, Joakim Eriksson, Niclas Finne, Marcus Lundén
* Created : 2005-11-01
* Updated : $Date: 2009/08/25 16:24:49 $
* $Revision: 1.1 $
*/
#include "dev/ext-sensor.h"
#include <io.h>
#include "dev/irq.h"
#include <stdio.h>
const struct sensors_sensor ext_sensor;
/*---------------------------------------------------------------------------*/
static void
init(void)
{
}
/*---------------------------------------------------------------------------*/
static int
irq(void)
{
return 0;
}
/*---------------------------------------------------------------------------*/
static void
activate(void)
{
/* This assumes that some other sensor system already did setup the ADC */
/* (in the case of the JCreate platform it is sensors_light_init before */
/* acc.meter that does it) */
/* P6.0 and P6.1 are inputs and peripheral function (A0, A1) selected */
/* P6SEL |= (1<<P6.0)|(1<<P6.1);*/
P6SEL |= 0x03;
P6DIR = 0x00;
P6OUT = 0x00;
/* stop converting immediately in order to be able to write to registers */
ADC12CTL0 &= ~ENC;
ADC12CTL1 &= ~CONSEQ_3;
/* Make sure that previous ADCMEM isn't EOS */
ADC12MCTL5 &= ~(EOS);
/* We want full voltage range, therefore +ref=Vcc and -ref=GND */
/* MemReg6 == P6.0/A0 == port "under" logo */
ADC12MCTL6 = (INCH_0 | SREF_0);
/* MemReg7 == P6.1/A1 == port "over" logo , End Of (ADC-)Sequence */
ADC12MCTL7 = (INCH_1 | SREF_0 | EOS);
/* Start ADC again */
ADC12CTL1 |= CONSEQ_3;
ADC12CTL0 |= ENC | ADC12SC;
/* Irq_adc12_activate(&ext_sensor, 6, (INCH_11 + SREF_1)); */
}
/*---------------------------------------------------------------------------*/
static void
deactivate(void)
{
/* stop converting immediately in order to be able to write to registers */
ADC12CTL0 &= ~ENC;
ADC12CTL1 &= ~CONSEQ_3;
/* Prev ADCMEM == EOS */
ADC12MCTL5 |= EOS;
/* Start ADC again */
ADC12CTL1 |= CONSEQ_3;
ADC12CTL0 |= ENC | ADC12SC;
/* irq_adc12_deactivate(&ext_sensor, 6);
ext_value = 0;*/
}
/*---------------------------------------------------------------------------*/
static int
active(void)
{
/* If previous ADCmem (5) has not EOS set, then extension ports are active */
if ((ADC12MCTL5&&EOS) == 0)
{
return 1;
}
else return (0); /* irq_adc12_active(6);*/
}
/*---------------------------------------------------------------------------*/
static unsigned int
value(int type)
{
/* value(0) corresponds to the port under the logo, value(1) to the port over the logo */
switch(type) {
case 0:
return ADC12MEM6;
case 1:
return ADC12MEM7;
}
return 0;
}
/*---------------------------------------------------------------------------*/
static int
configure(int type, void *c)
{
return 0;
}
/*---------------------------------------------------------------------------*/
static void *
status(int type)
{
return NULL;
}
/*---------------------------------------------------------------------------*/
SENSORS_SENSOR(ext_sensor, EXT_SENSOR,
init, irq, activate, deactivate, active,
value, configure, status);