atm128alarmasyncc.nc

来自「tinyos-2.x.rar」· NC 代码 · 共 68 行

// $Id: Atm128AlarmAsyncC.nc,v 1.1 2007/11/05 20:36:42 sallai Exp $
/*
 * Copyright (c) 2007 Intel Corporation
 * All rights reserved.
 *
 * This file is distributed under the terms in the attached INTEL-LICENSE     
 * file. If you do not find these files, copies can be found by writing to
 * Intel Research Berkeley, 2150 Shattuck Avenue, Suite 1300, Berkeley, CA, 
 * 94704.  Attention:  Intel License Inquiry.
 */

/*
 * 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
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/**
 * Build a 32-bit alarm and counter from the atmega1281's 8-bit timer 2
 * in asynchronous mode. Attempting to use the generic Atm128AlarmC
 * component and the generic timer components runs into problems
 * apparently related to letting timer 2 overflow.
 * 
 * So, instead, this version (inspired by the 1.x code and a remark from
 * Martin Turon) directly builds a 32-bit alarm and counter on top of timer 2
 * and never lets timer 2 overflow.
 *
 * @author David Gay
 * @author Janos Sallai <[e-mail]>
 */
generic configuration Atm128AlarmAsyncC(typedef precision, int divider) {
  provides {
    interface Init @atleastonce();
    interface Alarm<precision, uint32_t>;
    interface Counter<precision, uint32_t>;
  }
}
implementation
{
  components new Atm1281AlarmAsyncP(precision, divider),
    HplAtm1281Timer2AsyncC;

  Init = Atm1281AlarmAsyncP;
  Alarm = Atm1281AlarmAsyncP;
  Counter = Atm1281AlarmAsyncP;

  Atm1281AlarmAsyncP.Timer -> HplAtm1281Timer2AsyncC;
  Atm1281AlarmAsyncP.TimerCtrl -> HplAtm1281Timer2AsyncC;
  Atm1281AlarmAsyncP.Compare -> HplAtm1281Timer2AsyncC;
  Atm1281AlarmAsyncP.TimerAsync -> HplAtm1281Timer2AsyncC;
}