com.sun.spot.sensorboard.io
Class InvertingInputPin

java.lang.Object
  com.sun.spot.sensorboard.io.InvertingInputPin

All Implemented Interfaces:

IInputPin, IInputPinListener

public class InvertingInputPin
extends Object
implements IInputPin, IInputPinListener

Class implementing single bit input with inversion of values read, i.e. low signal is returned as high and high signal is returned as low.

Author:

jn151271 11-Mar-2005

Constructor Summary

InvertingInputPin(IInputPin input)
Constructor.

Method Summary

void	addIInputPinListener(IInputPinListener who) Adds the specified input pin listener to receive callbacks from this input pin.
IInputPinListener[]	getIInputPinListeners() Returns an array of all the input pin listeners registered on this input pin.
PinDescriptor	getIndex() Return the PinDescriptor associated with this input pin.
boolean	isHigh() Return true if the actual input bit is low.
boolean	isLow() Return true if the actual input bit is high.
void	pinSetHigh(IInputPin pin) Callback from associated InputPin to when switch released.
void	pinSetLow(IInputPin pin) Callback from associated InputPin to when switch pressed.
void	removeIInputPinListener(IInputPinListener who) Removes the specified input pin listener so that it no longer receives callbacks from this input pin.
void	waitForChange() Blocks until there is a change, either way, in the input, as defined for the interface IInputPin

Methods inherited from class java.lang.Object

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

Constructor Detail

InvertingInputPin

public InvertingInputPin(IInputPin input)

Constructor. Stores the single-bit input to be used.

Parameters:

input - single-bit input to be used

Method Detail

getIndex

public PinDescriptor getIndex()

Return the PinDescriptor associated with this input pin.

Specified by:

getIndex in interface IInputPin

Returns:

the PinDescriptor associated with this input pin.

isLow

public boolean isLow()

Return true if the actual input bit is high.

Specified by:

isLow in interface IInputPin

Returns:

true if the input is high, false if the input is low, i.e. the exact opposite of the returned value as described for the interface SingleBitInput

See Also:

IInputPin.isLow()

isHigh

public boolean isHigh()

Return true if the actual input bit is low.

Specified by:

isHigh in interface IInputPin

Returns:

true if the input is low, false if the input is high, i.e. the exact opposite of the returned value as described for the interface SingleBitInput

See Also:

IInputPin.isHigh()

waitForChange

public void waitForChange()

Blocks until there is a change, either way, in the input, as defined for the interface IInputPin

Specified by:

waitForChange in interface IInputPin

See Also:

IInputPin.waitForChange()

addIInputPinListener

public void addIInputPinListener(IInputPinListener who)

Adds the specified input pin listener to receive callbacks from this input pin.

Specified by:

addIInputPinListener in interface IInputPin

Parameters:

who - the input pin listener to add.

removeIInputPinListener

public void removeIInputPinListener(IInputPinListener who)

Removes the specified input pin listener so that it no longer receives callbacks from this input pin. This method performs no function, nor does it throw an exception, if the listener specified by the argument was not previously added to this input pin.

Specified by:

removeIInputPinListener in interface IInputPin

Parameters:

who - the input pin listener to remove.

getIInputPinListeners

public IInputPinListener[] getIInputPinListeners()

Returns an array of all the input pin listeners registered on this input pin.

Specified by:

getIInputPinListeners in interface IInputPin

Returns:

all of this input pin's listeners or an empty array if no input pin listeners are currently registered.

pinSetLow

public void pinSetLow(IInputPin pin)

Callback from associated InputPin to when switch pressed. Spawns threads to notify any registered IInputPinListener.

Specified by:

pinSetLow in interface IInputPinListener

pinSetHigh

public void pinSetHigh(IInputPin pin)

Callback from associated InputPin to when switch released. Spawns threads to notify any registered IInputPinListener.

Specified by:

pinSetHigh in interface IInputPinListener

Parameters:

pin - the pin that has changed state to high.