cc2420packetc.nc

来自「tinyos-2.0源代码！转载而已！要的尽管拿！」· NC 代码 · 共 87 行

/*
 * Copyright (c) 2005-2006 Arch Rock Corporation
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - 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.
 * - Neither the name of the Arch Rock Corporation 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 COPYRIGHT HOLDERS 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
 * ARCHED ROCK OR ITS 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
 */

/**
 * @author Jonathan Hui <[e-mail]>
 * @version $Revision: 1.1.2.2 $ $Date: 2006/06/20 18:56:04 $
 */

module CC2420PacketC {

  provides interface CC2420Packet;
  provides interface PacketAcknowledgements as Acks;

}

implementation {

  cc2420_header_t* getHeader( message_t* msg ) {
    return (cc2420_header_t*)( msg->data - sizeof( cc2420_header_t ) );
  }

  cc2420_metadata_t* getMetadata( message_t* msg ) {
    return (cc2420_metadata_t*)msg->metadata;
  }

  async command error_t Acks.requestAck( message_t* p_msg ) {
    getHeader( p_msg )->fcf |= 1 << IEEE154_FCF_ACK_REQ;
    return SUCCESS;
  }

  async command error_t Acks.noAck( message_t* p_msg ) {
    getHeader( p_msg )->fcf &= ~(1 << IEEE154_FCF_ACK_REQ);
    return SUCCESS;
  }

  async command bool Acks.wasAcked( message_t* p_msg ) {
    return getMetadata( p_msg )->ack;
  }

  async command void CC2420Packet.setPower( message_t* p_msg, uint8_t power ) {
    if ( power > 31 )
      power = 31;
    getMetadata( p_msg )->tx_power = power;
  }

  async command uint8_t CC2420Packet.getPower( message_t* p_msg ) {
    return getMetadata( p_msg )->tx_power;
  }
   
  async command int8_t CC2420Packet.getRssi( message_t* p_msg ) {
    return getMetadata( p_msg )->rssi;
  }

  async command error_t CC2420Packet.getLqi( message_t* p_msg ) {
    return getMetadata( p_msg )->lqi;
  }

}