net.happybrackets.device.sensors.gpio

Class GPIOInput

java.lang.Object

net.happybrackets.device.sensors.gpio.GPIO

net.happybrackets.device.sensors.gpio.GPIOInput

All Implemented Interfaces:

GPIOInputListener

Direct Known Subclasses:

GPIOInputSimulator, RaspbianGPIOInput

public abstract class GPIOInput
extends GPIO
implements GPIOInputListener

Class for detecting GPIO input changes

Field Summary

Fields inherited from class net.happybrackets.device.sensors.gpio.GPIO

gpioNumber, pinType

Method Summary

Modifier and Type	Method and Description
void	addStateListener(GPIOInputListener listener) Add a listener to be notified when a state change occurs
static GPIOInput	getInputPin(int gpio_number) Get a GPIO input pin.
static GPIOInput	getInputPin(int gpio_number, com.pi4j.io.gpio.PinPullResistance pinPullResistance) Get a GPIO input pin.
void	removeStateListener(GPIOInputListener listener) Remove a specific listener
void	stateChanged(GPIOInput sensor, boolean new_state)

Methods inherited from class net.happybrackets.device.sensors.gpio.GPIO

clearPinAssignment, getGpioNumber, resetAllGPIO, resetGpioListeners

Methods inherited from class java.lang.Object

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

Method Detail

stateChanged

public void stateChanged(GPIOInput sensor,
                         boolean new_state)

Specified by:

stateChanged in interface GPIOInputListener

addStateListener

public void addStateListener(GPIOInputListener listener)

Add a listener to be notified when a state change occurs

Parameters:

listener - the listener to be notified

removeStateListener

public void removeStateListener(GPIOInputListener listener)

Remove a specific listener

Parameters:

listener - the listener to remove

getInputPin

public static GPIOInput getInputPin(int gpio_number)

Get a GPIO input pin. There will be no Pullup resistance defined

Parameters:

gpio_number - the GPIO number

Returns:

the GPIO Pin if it is available, otherwise null

getInputPin

public static GPIOInput getInputPin(int gpio_number,
                                    com.pi4j.io.gpio.PinPullResistance pinPullResistance)

Get a GPIO input pin.

Parameters:

gpio_number - the Pin Number

pinPullResistance - the Pullup type for the input. Will only count if the pin has not already been created in another sketch

Returns:

If an input pin already exists for that pin number or we were able to create it, will return the GPIOInput. If not, will retrun null