nes-proj/platform/esb/dev/radio-sensor.c

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/*
* Copyright (c) 2005, 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.
*
* This file is part of the Contiki operating system.
*
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* @(#)$Id: radio-sensor.c,v 1.5 2010/02/08 00:00:45 nifi Exp $
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*/
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#include "dev/radio-sensor.h"
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#include "dev/irq.h"
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#include "dev/tr1001.h"
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const struct sensors_sensor radio_sensor;
unsigned int radio_sensor_signal;
/*---------------------------------------------------------------------------*/
static int
irq(void)
{
radio_sensor_signal = ADC12MEM5;
return 0;
}
/*---------------------------------------------------------------------------*/
static int
value(int type)
{
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switch(type) {
case RADIO_SENSOR_LAST_PACKET:
return tr1001_sstrength();
case RADIO_SENSOR_LAST_VALUE:
default:
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return radio_sensor_signal;
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}
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}
/*---------------------------------------------------------------------------*/
static int
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configure(int type, int value)
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{
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switch(type) {
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case SENSORS_HW_INIT:
/* Initialization of ADC12 done by irq */
radio_sensor_signal = 0;
return 1;
case SENSORS_ACTIVE:
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if(value) {
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if(!irq_adc12_active(5)) {
irq_adc12_activate(5, (INCH_5 + SREF_0), irq);
}
} else {
irq_adc12_deactivate(5);
radio_sensor_signal = 0;
}
return 1;
}
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return 0;
}
/*---------------------------------------------------------------------------*/
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static int
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status(int type)
{
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switch(type) {
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case SENSORS_ACTIVE:
case SENSORS_READY:
return irq_adc12_active(5);
}
return 0;
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}
/*---------------------------------------------------------------------------*/
SENSORS_SENSOR(radio_sensor, RADIO_SENSOR,
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value, configure, status);