com.dalsemi.system
Class ExternalInterrupt

java.lang.Object
  |
  +--com.dalsemi.system.ExternalInterrupt

public class ExternalInterrupt

extends java.lang.Object

This class allows an application to manage external interrupts received by TINI. External interrupts can be used to respond to external events such as a push button being pressed. The interrupt can be configured to be falling edge triggered or low level triggered. Resources for external interrupts are shared with TINI's external serial ports and the parallel port interrupt circuitry that may exist on some socket boards.

See Also:

ExternalInterruptEvent, ExternalInterruptEventListener, ExternalInterruptException

Field Summary

static int	TRIGGER_EDGE Interrupt triggering is falling edge triggered.
static int	TRIGGER_LEVEL Interrupt triggering is low level triggered.

Constructor Summary

ExternalInterrupt()

Method Summary

void	addEventListener(ExternalInterruptEventListener externalEventListener) Adds an event listener to TINI's external interrupt event chain.
static boolean	getTrigger() Gets the current trigger state.
void	removeEventListener(ExternalInterruptEventListener externalEventListener) Removes an event listener from TINI's external interrupt event chain.
static void	setTrigger(boolean edgeTrigger, ExternalInterruptEventListener owner) Sets the external interrupt trigger state to edge or level triggered.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

TRIGGER_LEVEL

public static final int TRIGGER_LEVEL

Interrupt triggering is low level triggered.

TRIGGER_EDGE

public static final int TRIGGER_EDGE

Interrupt triggering is falling edge triggered.

Constructor Detail

ExternalInterrupt

public ExternalInterrupt()

Method Detail

addEventListener

public void addEventListener(ExternalInterruptEventListener externalEventListener)
                      throws java.util.TooManyListenersException

Adds an event listener to TINI's external interrupt event chain.

Parameters:

externalEventListener - reference to the class that will be added to the listener chain

Throws:

java.util.TooManyListenersException - if no more listiners can be added

removeEventListener

public void removeEventListener(ExternalInterruptEventListener externalEventListener)

Removes an event listener from TINI's external interrupt event chain.

Parameters:

externalEventListener - reference to the class that will be removed from the listener chain

setTrigger

public static void setTrigger(boolean edgeTrigger,
                              ExternalInterruptEventListener owner)
                       throws ExternalInterruptException

Sets the external interrupt trigger state to edge or level triggered.

Parameters:

edgeTrigger - set to true for edge triggering or false for level triggering

Throws:

ExternalInterruptException - if triggering is owned by another listener in the current process, by another process or by the external serial ports

getTrigger

public static boolean getTrigger()

Gets the current trigger state.

Returns:

true if edge triggered and false if level triggered