ds2401toieeeeui64c.nc

来自「tinyos-2.x.rar」· NC 代码 · 共 64 行

// $Id: Ds2401ToIeeeEui64C.nc,v 1.1 2008/10/31 17:02:55 sallai Exp $
/*
 * Copyright (c) 2007, Vanderbilt University
 * All rights reserved.
 *
 * Permission to use, copy, modify, and distribute this software and its
 * documentation for any purpose, without fee, and without written agreement is
 * hereby granted, provided that the above copyright notice, the following
 * two paragraphs and the author appear in all copies of this software.
 *
 * IN NO EVENT SHALL THE VANDERBILT UNIVERSITY BE LIABLE TO ANY PARTY FOR
 * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT
 * OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF THE VANDERBILT
 * UNIVERSITY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * THE VANDERBILT UNIVERSITY SPECIFICALLY DISCLAIMS ANY WARRANTIES,
 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
 * AND FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS
 * ON AN "AS IS" BASIS, AND THE VANDERBILT UNIVERSITY HAS NO OBLIGATION TO
 * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
 *
 * Author: Janos Sallai
 */

#include "Ds2401.h"
#include "IeeeEui64.h"
#include "PlatformIeeeEui64.h"

/**
 * Convert silicon serial ID to IEEE EUI 64, according to Application Note
 * 186 - Creating Global Identifiers Using 1-Wire Devices from Dallas/Maxim.
 */
module Ds2401ToIeeeEui64C {
  uses interface HplDs2401 as Hpl;
  provides interface LocalIeeeEui64;
} implementation {

  command ieee_eui64_t LocalIeeeEui64.getId() {
    ds2401_serial_t rom;
    ieee_eui64_t eui;
    
    atomic {
      call Hpl.read(&rom);
    }

    // company ID
    eui.data[0] = IEEE_EUI64_COMPANY_ID_0;
    eui.data[1] = IEEE_EUI64_COMPANY_ID_1;
    eui.data[2] = IEEE_EUI64_COMPANY_ID_2;

    // 16 bits of the ID is generated by software
    // could be used for hardware model id and revision, for example
    eui.data[3] = IEEE_EUI64_SERIAL_ID_0;
    eui.data[4] = IEEE_EUI64_SERIAL_ID_1;

    // 24 least significant bits of the serial ID read from the DS2401
    eui.data[5] = rom.data[3];
    eui.data[6] = rom.data[2];
    eui.data[7] = rom.data[1];

    return eui;
  }
}