Package com.diozero.api

Class DigitalInputDevice

java.lang.Object

com.diozero.api.GpioDevice

com.diozero.api.GpioInputDevice<DigitalInputEvent>

com.diozero.api.AbstractDigitalInputDevice

com.diozero.api.DigitalInputDevice

All Implemented Interfaces:

DigitalInputDeviceInterface, InputEventListener<DigitalInputEvent>, java.io.Closeable, java.lang.AutoCloseable

Direct Known Subclasses:

Button, WaitableDigitalInputDevice

public class DigitalInputDevice
extends AbstractDigitalInputDevice

Represents a generic digital input device.

Field Summary

Fields

Modifier and Type	Field	Description
protected GpioDigitalInputDeviceInterface	device

Fields inherited from class com.diozero.api.AbstractDigitalInputDevice

activeHigh

Fields inherited from class com.diozero.api.GpioDevice

gpio

Constructor Summary

Constructors

Constructor	Description
DigitalInputDevice(int gpio)
DigitalInputDevice(int gpio, GpioPullUpDown pud, GpioEventTrigger trigger)
DigitalInputDevice(GpioDeviceFactoryInterface deviceFactory, int gpio, GpioPullUpDown pud, GpioEventTrigger trigger)

Method Summary

Modifier and Type	Method	Description
void	close()
GpioPullUpDown	getPullUpDown()	Get pull up / down configuration.
GpioEventTrigger	getTrigger()	Get event trigger configuration.
boolean	getValue()	Read the current underlying state of the input pin.
boolean	isActive()	Read the current on/off state for this device taking into account the pull up / down configuration.
protected void	removeListener()
protected void	setListener()

Methods inherited from class com.diozero.api.AbstractDigitalInputDevice

disableDeviceListener, enableDeviceListener, isActiveHigh, valueChanged, whenActivated, whenDeactivated

Methods inherited from class com.diozero.api.GpioInputDevice

addListener, removeAllListeners, removeListener

Methods inherited from class com.diozero.api.GpioDevice

getGpio

Methods inherited from class java.lang.Object

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

Field Details

device

protected GpioDigitalInputDeviceInterface device

Constructor Details

DigitalInputDevice

public DigitalInputDevice(int gpio) throws RuntimeIOException

Parameters:

gpio - GPIO to which the device is connected.

Throws:

RuntimeIOException - If an I/O error occurs.

DigitalInputDevice

public DigitalInputDevice(int gpio, GpioPullUpDown pud, GpioEventTrigger trigger) throws RuntimeIOException

Parameters:

gpio - GPIO to which the device is connected.

pud - Pull up/down configuration, values: NONE, PULL_UP, PULL_DOWN.

trigger - Event trigger configuration, values: NONE, RISING, FALLING, BOTH.

Throws:

RuntimeIOException - If an I/O error occurs.

DigitalInputDevice

public DigitalInputDevice(GpioDeviceFactoryInterface deviceFactory, int gpio, GpioPullUpDown pud, GpioEventTrigger trigger) throws RuntimeIOException

Parameters:

deviceFactory - Device factory to use to provision this digital input device.

gpio - GPIO to which the device is connected.

pud - Pull up/down configuration, values: NONE, PULL_UP, PULL_DOWN.

trigger - Event trigger configuration, values: NONE, RISING, FALLING, BOTH.

Throws:

RuntimeIOException - If an I/O error occurs.

Method Details

close

public void close()

getPullUpDown

public GpioPullUpDown getPullUpDown()

Get pull up / down configuration.

Returns:

Pull up / down configuration.

getTrigger

public GpioEventTrigger getTrigger()

Get event trigger configuration.

Returns:

Event trigger configuration.

getValue

public boolean getValue() throws RuntimeIOException

Read the current underlying state of the input pin. Does not factor in active high logic.

Returns:

Device state.

Throws:

RuntimeIOException - If an I/O error occurred.

isActive

public boolean isActive() throws RuntimeIOException

Read the current on/off state for this device taking into account the pull up / down configuration. If the input is pulled up isActive() will return true when when the value is false.

Returns:

Device active state.

Throws:

RuntimeIOException - If an I/O error occurred.

setListener

protected void setListener()

Specified by:

setListener in class AbstractDigitalInputDevice

removeListener

protected void removeListener()

Specified by:

removeListener in class AbstractDigitalInputDevice