text: /*
   * 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.
   *
   * @(#)$Id: radio-sensor.c,v 1.5 2010/02/08 00:00:45 nifi Exp $
   */
  
  #include "contiki.h"
  #include "dev/radio-sensor.h"
  #include "dev/irq.h"
  #include "dev/tr1001.h"
  
  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)
  {
    switch(type) {
    case RADIO_SENSOR_LAST_PACKET:
      return tr1001_sstrength();
    case RADIO_SENSOR_LAST_VALUE:
    default:
      return radio_sensor_signal;
    }
  }
  /*---------------------------------------------------------------------------*/
  static int
  configure(int type, int value)
  {
    switch(type) {
    case SENSORS_HW_INIT:
      /* Initialization of ADC12 done by irq */
      radio_sensor_signal = 0;
      return 1;
    case SENSORS_ACTIVE:
      if(value) {
        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;
    }
    return 0;
  }
  /*---------------------------------------------------------------------------*/
  static int
  status(int type)
  {
    switch(type) {
    case SENSORS_ACTIVE:
    case SENSORS_READY:
      return irq_adc12_active(5);
    }
    return 0;
  }
  /*---------------------------------------------------------------------------*/
  SENSORS_SENSOR(radio_sensor, RADIO_SENSOR,
                 value, configure, status);
  