com.sun.spot.sensorboard.io
Class IOPin

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

All Implemented Interfaces:

IInputPin, IIOPin, IOutputPin

public class IOPin
extends Object
implements IIOPin

Constructor Summary

IOPin(PinDescriptor idx, IGPIOController cntrl)

Method Summary

void	addIInputPinListener(IInputPinListener who) Adds the specified input pin listener to receive callbacks from this input pin.
boolean	equals(Object obj) Indicates whether some other object is "equal to" this iopin.
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	getState() Return the current state of this (output) pin.
int	hashCode() Returns a hash code value for the object.
boolean	isHigh() Return true if the input bit is high.
boolean	isLow() Return true if the input bit is low.
boolean	isOutput() Ask if this pin is an output.
void	notifyIInputPinListeners(boolean nowHigh) Called by pin's IGPIOController when pin state changes.
void	removeIInputPinListener(IInputPinListener who) Removes the specified input pin listener so that it no longer receives callbacks from this input pin.
void	setAsOutput(boolean b)
void	setHigh() Sets pin output high
void	setHigh(boolean high)
void	setLow() Sets pin output low
void	waitForChange() Block the current thread until the pin's state changes.

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

IOPin

public IOPin(PinDescriptor idx,
             IGPIOController cntrl)

Method Detail

setHigh

public void setHigh()

Description copied from interface: IOutputPin

Sets pin output high

Specified by:

setHigh in interface IOutputPin

setLow

public void setLow()

Description copied from interface: IOutputPin

Sets pin output low

Specified by:

setLow in interface IOutputPin

setHigh

public void setHigh(boolean high)

Specified by:

setHigh in interface IOutputPin

Parameters:

high - boolean. If true, output is set high, otherwise output is set low.

isLow

public boolean isLow()

Description copied from interface: IInputPin

Return true if the input bit is low.

Specified by:

isLow in interface IInputPin

Returns:

true if the input bit is low.

isHigh

public boolean isHigh()

Description copied from interface: IInputPin

Return true if the input bit is high.

Specified by:

isHigh in interface IInputPin

Returns:

true if the input bit is high.

getState

public boolean getState()

Return the current state of this (output) pin.

Specified by:

getState in interface IOutputPin

Returns:

current state of this pin

waitForChange

public void waitForChange()

Description copied from interface: IInputPin

Block the current thread until the pin's state changes. (This now uses interrupts and no longer polls.) Note: waitForChange does not inhibit deep sleep.

Specified by:

waitForChange in interface IInputPin

isOutput

public boolean isOutput()

Description copied from interface: IIOPin

Ask if this pin is an output. Pins are initially inputs. Note that it is possible to query the current pin setting of an output pin using isHigh() and isLow().

Specified by:

isOutput in interface IIOPin

Returns:

true if this pin is currently set to be an output

setAsOutput

public void setAsOutput(boolean b)

Specified by:

setAsOutput in interface IIOPin

Parameters:

b - if b is true the pin becomes an output, if false it becomes an input

getIndex

public PinDescriptor getIndex()

Return the PinDescriptor associated with this input pin.

Specified by:

getIndex in interface IInputPin

Specified by:

getIndex in interface IOutputPin

Returns:

the PinDescriptor associated with this input pin.

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.

notifyIInputPinListeners

public void notifyIInputPinListeners(boolean nowHigh)

Called by pin's IGPIOController when pin state changes. Spawns threads to notify any registered IInputPinListeners.

Parameters:

nowHigh - true if pin is currently set to high state.

equals

public boolean equals(Object obj)

Indicates whether some other object is "equal to" this iopin.

Overrides:

equals in class Object

Parameters:

obj - the reference object with which to compare.

Returns:

true if this iopin is the same as the obj argument; false otherwise.

See Also:

Boolean.hashCode(), Hashtable

hashCode

public int hashCode()

Returns a hash code value for the object.

Overrides:

hashCode in class Object

Returns:

a hash code value for this object.

See Also:

Object.equals(java.lang.Object), Hashtable