m16c62pcounter16c.nc

tinyos-2.x.rar

/*
 * Copyright (c) 2009 Communication Group and Eislab at
 * Lulea University of Technology
 *
 * Contact: Laurynas Riliskis, LTU
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/**
 * Build a TEP102 16bits Counter from an M16c/62p hardware timer.
 *
 * @author Henrik Makitaavola <[e-mail]>
 */

generic module M16c62pCounter16C(typedef precision_tag)
{
  provides interface Counter<precision_tag, uint16_t> as Counter;
  uses interface HplM16c62pTimer as Timer;
}
implementation
{
  async command uint16_t Counter.get()
  {
    // The timer counts down so the time needs to be inverted.
    return (0xFFFF) - call Timer.get();
  }

  async command bool Counter.isOverflowPending()
  {
    return call Timer.testInterrupt();
  }

  async command void Counter.clearOverflow()
  {
    call Timer.clearInterrupt();
  }

  async event void Timer.fired()
  {
    signal Counter.overflow();
  }
}