hplonoffm.nc

nesC写的heed算法

// $Id: HPLOnOffM.nc,v 1.3.4.2 2003/08/18 22:09:49 cssharp Exp $

/*									tab:4
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 * Copyright (c) 2002-2003 Intel Corporation
 * All rights reserved.
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/* 
 * $Id: HPLOnOffM.nc,v 1.3.4.2 2003/08/18 22:09:49 cssharp Exp $
 *
 */

includes onoff;

module HPLOnOffM
{
  provides {
    interface OnOff;
  }
  uses {
    interface ReceiveMsg;
    command result_t SetListeningMode(uint8_t power);
    command uint8_t GetListeningMode();
  }
}

implementation
{

  bool newmode;
  OnOff_Msg* onoffmsg;

  task void turnOff() {
    result_t retval = signal OnOff.requestOff();
    if (retval == SUCCESS)
      call OnOff.off();
  }

  task void turnOn() {
    result_t result;
    uint8_t prev_state = call GetListeningMode();

    if (prev_state == 0) {
	signal OnOff.on();
        return;
    }

    if (call SetListeningMode(0)) {
      result = signal OnOff.on();
      if (!result)
        call SetListeningMode(prev_state);
    }
  }
  
  command result_t OnOff.off() {
    result_t retval = call SetListeningMode(CC1K_LPL_STATES-1);
    if (retval)
      newmode = FALSE;
    return retval;
  }

  event TOS_MsgPtr ReceiveMsg.receive(TOS_MsgPtr m) {
    onoffmsg = (OnOff_Msg*)m->data;
    if (onoffmsg->action) {
      newmode = TRUE;
      post turnOn();
    }
    else {
      post turnOff();
    }
    return m;
  }

}