msp430interruptc.nc

tinyos-2.x.rar

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/**
 * Implementation of the GPIO interrupt abstraction for
 * the TI MSP430 microcontroller.
 *
 * @author Jonathan Hui
 * @author Joe Polastre
 * @see  Please refer to TEP 117 for more information about this component and its
 *          intended use.
 */

generic module Msp430InterruptC() @safe() {

  provides interface GpioInterrupt as Interrupt;
  uses interface HplMsp430Interrupt as HplInterrupt;

}

implementation {

  error_t enable( bool rising ) {
    atomic {
      call Interrupt.disable();
      call HplInterrupt.edge( rising );
      call HplInterrupt.enable();
    }
    return SUCCESS;
  }

  async command error_t Interrupt.enableRisingEdge() {
    return enable( TRUE );
  }

  async command error_t Interrupt.enableFallingEdge() {
    return enable( FALSE );
  }

  async command error_t Interrupt.disable() {
    atomic {
      call HplInterrupt.disable();
      call HplInterrupt.clear();
    }
    return SUCCESS;
  }

  async event void HplInterrupt.fired() {
    call HplInterrupt.clear();
    signal Interrupt.fired();
  }

}