gpiocapturec.nc

tinyos-2.x.rar

/* "Copyright (c) 2000-2003 The Regents of the University of California.
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 * IN NO EVENT SHALL THE UNIVERSITY OF CALIFORNIA BE LIABLE TO ANY PARTY FOR
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/**
 * @author Jonathan Hui
 * @author Joe Polastre
 */

generic module GpioCaptureC() @safe() {

  provides interface GpioCapture as Capture;
  uses interface Msp430TimerControl;
  uses interface Msp430Capture;
  uses interface HplMsp430GeneralIO as GeneralIO;

}

implementation {

  error_t enableCapture( uint8_t mode ) {
    atomic {
      call Msp430TimerControl.disableEvents();
      call GeneralIO.selectModuleFunc();
      call Msp430TimerControl.clearPendingInterrupt();
      call Msp430Capture.clearOverflow();
      call Msp430TimerControl.setControlAsCapture( mode );
      call Msp430TimerControl.enableEvents();
    }
    return SUCCESS;
  }

  async command error_t Capture.captureRisingEdge() {
    return enableCapture( MSP430TIMER_CM_RISING );
  }

  async command error_t Capture.captureFallingEdge() {
    return enableCapture( MSP430TIMER_CM_FALLING );
  }

  async command void Capture.disable() {
    atomic {
      call Msp430TimerControl.disableEvents();
      call GeneralIO.selectIOFunc();
    }
  }

  async event void Msp430Capture.captured( uint16_t time ) {
    call Msp430TimerControl.clearPendingInterrupt();
    call Msp430Capture.clearOverflow();
    signal Capture.captured( time );
  }

}