counter32khz32c.nc

tinyos2.0版本驱动

// $Id: Counter32khz32C.nc,v 1.4 2006/12/12 18:23:42 vlahan Exp $
/*
 * Copyright (c) 2005-2006 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.
 */
/**
 * 32-bit 32kHz Counter component as per TEP102 HAL guidelines. The mica
 * family 32kHz clock is built on hardware timer 1, and actually runs at
 * CPU frequency / 256. You can use the MeasureClockC.cyclesPerJiffy()
 * command to figure out the exact frequency.
 *
 * @author David Gay <[e-mail]>
 */

#include <MicaTimer.h>

configuration Counter32khz32C
{
  provides interface Counter<T32khz, uint32_t>;
}
implementation
{
  components CounterOne16C as Counter16, 
    new TransformCounterC(T32khz, uint32_t, T32khz, uint16_t,
			  MICA_DIVIDE_ONE_FOR_32KHZ_LOG2,
			  counter_one_overflow_t) as Transform32;

  Counter = Transform32;
  Transform32.CounterFrom -> Counter16;
}