Package com.diozero.api

Class DigitalOutputDevice

java.lang.Object

com.diozero.api.GpioDevice

com.diozero.api.DigitalOutputDevice

All Implemented Interfaces:

OutputDeviceInterface, Closeable, AutoCloseable

Direct Known Subclasses:

Buzzer, LED

public class DigitalOutputDevice
extends GpioDevice
implements OutputDeviceInterface

Provides generic digital (on/off) output control with support for active high and low logic.

Field Summary

Fields

Modifier and Type	Field	Description
static int	INFINITE_ITERATIONS

Fields inherited from class com.diozero.api.GpioDevice

gpio

Constructor Summary

Constructors

Constructor	Description
DigitalOutputDevice(int gpio)	Defaults to active high logic, initial value is off.
DigitalOutputDevice(int gpio, boolean activeHigh, boolean initialValue)
DigitalOutputDevice(GpioDeviceFactoryInterface deviceFactory, int gpio, boolean activeHigh, boolean initialValue)
DigitalOutputDevice(GpioDeviceFactoryInterface deviceFactory, PinInfo pinInfo, boolean activeHigh, boolean initialValue)

Method Summary

Modifier and Type	Method	Description
void	close()
boolean	isOn()	Get the device on / off status.
void	off()	Turn off the device.
void	on()	Turn on the device.
void	onOffLoop(float onTime, float offTime, int n, boolean background, Action stopAction)	Toggle the device on-off.
void	setOn(boolean on)	Turn the device on or off.
void	setValue(float value)	Set the output value to true if value != 0
void	setValueUnsafe(boolean value)	Unsafe operation that has no synchronisation checks and doesn't compensate for active low logic.
void	toggle()	Toggle the state of the device.

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

INFINITE_ITERATIONS

public static final int INFINITE_ITERATIONS

See Also:

Constant Field Values

Constructor Details

DigitalOutputDevice

public DigitalOutputDevice(int gpio)
                    throws RuntimeIOException

Defaults to active high logic, initial value is off.

Parameters:

gpio - GPIO to which the output device is connected.

Throws:

RuntimeIOException - If an I/O error occurred.

DigitalOutputDevice

public DigitalOutputDevice(int gpio,
boolean activeHigh,
boolean initialValue)
                    throws RuntimeIOException

Parameters:

gpio - GPIO to which the output device is connected.

activeHigh - If true then setting the value to true will turn on the connected device.

initialValue - Initial output value.

Throws:

RuntimeIOException - If an I/O error occurred.

DigitalOutputDevice

public DigitalOutputDevice(GpioDeviceFactoryInterface deviceFactory,
int gpio,
boolean activeHigh,
boolean initialValue)
                    throws RuntimeIOException

Parameters:

deviceFactory - Device factory to use to construct the device.

gpio - GPIO to which the output device is connected.

activeHigh - If true then setting the value to true will turn on the connected device.

initialValue - Initial output value.

Throws:

RuntimeIOException - If an I/O error occurred.

DigitalOutputDevice

public DigitalOutputDevice(GpioDeviceFactoryInterface deviceFactory,
PinInfo pinInfo,
boolean activeHigh,
boolean initialValue)
                    throws RuntimeIOException

Parameters:

deviceFactory - Device factory to use to construct the device.

pinInfo - Information about the GPIO pin to which the output device is connected.

activeHigh - If true then setting the value to true will turn on the connected device.

initialValue - Initial output value.

Throws:

RuntimeIOException - If an I/O error occurred.

Method Details

close

public void close()

Specified by:

close in interface AutoCloseable

Specified by:

close in interface Closeable

on

public void on()
        throws RuntimeIOException

Turn on the device.

Throws:

RuntimeIOException - If an I/O error occurred.

off

public void off()
         throws RuntimeIOException

Turn off the device.

Throws:

RuntimeIOException - If an I/O error occurred.

toggle

public void toggle()
            throws RuntimeIOException

Toggle the state of the device.

Throws:

RuntimeIOException - If an I/O error occurred.

isOn

public boolean isOn()
             throws RuntimeIOException

Get the device on / off status.

Returns:

Returns true if the device is currently on.

Throws:

RuntimeIOException - If an I/O error occurred.

setOn

public void setOn(boolean on)
           throws RuntimeIOException

Turn the device on or off.

Parameters:

on - New on/off value.

Throws:

RuntimeIOException - If an I/O error occurred.

setValueUnsafe

public void setValueUnsafe(boolean value)
                    throws RuntimeIOException

Unsafe operation that has no synchronisation checks and doesn't compensate for active low logic. Included primarily for performance tests.

Parameters:

value - The new value

Throws:

RuntimeIOException - If an I/O error occurs

setValue

public void setValue(float value)

Set the output value to true if value != 0

Specified by:

setValue in interface OutputDeviceInterface

Parameters:

value - The new value

onOffLoop

public void onOffLoop(float onTime,
float offTime,
int n,
boolean background,
Action stopAction)
               throws RuntimeIOException

Toggle the device on-off.

Parameters:

onTime - On time in seconds.

offTime - Off time in seconds.

n - Number of iterations. Set to <0 to blink indefinitely.

background - If true start a background thread to control the blink and return immediately. If false, only return once the blink iterations have finished.

stopAction - Action to perform when the loop finishes

Throws:

RuntimeIOException - If an I/O error occurs