Package com.diozero.devices

Class PCF8574

java.lang.Object

com.diozero.internal.spi.AbstractDeviceFactory

com.diozero.devices.PCF8574

All Implemented Interfaces:

GpioExpander, DeviceFactoryInterface, GpioDeviceFactoryInterface, Closeable, AutoCloseable

public class PCF8574
extends AbstractDeviceFactory
implements GpioDeviceFactoryInterface, GpioExpander

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	PCF8574.PCF8574BoardPinInfo

Field Summary

Fields inherited from class com.diozero.internal.spi.AbstractDeviceFactory

closed, deviceStates

Constructor Summary

Constructors

Constructor	Description
PCF8574(int controller, int address)
PCF8574(I2CDeviceFactoryInterface deviceFactory, int controller, int address)

Method Summary

Modifier and Type	Method	Description
void	close()	Close this device factory including all devices that have been provisioned by it.
void	closePin(int gpio)
GpioDigitalInputDeviceInterface	createDigitalInputDevice(String key, PinInfo pinInfo, GpioPullUpDown pud, GpioEventTrigger trigger)
GpioDigitalInputOutputDeviceInterface	createDigitalInputOutputDevice(String key, PinInfo pinInfo, DeviceMode mode)
GpioDigitalOutputDeviceInterface	createDigitalOutputDevice(String key, PinInfo pinInfo, boolean initialValue)
BoardPinInfo	getBoardPinInfo()	Get information about pins that can be provisioned by this device factory.
String	getName()	Get the name of this device factory
boolean	getValue(int gpio)
byte	getValues(int port)
void	setDirections(int port, byte directions)	Set the directions for all pins on this port using the specified directions bit mask.
void	setInputMode(int gpio)
void	setOutputMode(int gpio)
void	setValue(int gpio, boolean value)
void	setValues(int port, byte values)	Set the output value for a pins on this port.

Methods inherited from class com.diozero.internal.spi.AbstractDeviceFactory

createI2CKey, createPinKey, createSerialKey, createSpiKey, deviceClosed, deviceOpened, getDevice, isClosed, isDeviceOpened, reopen

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.diozero.internal.spi.DeviceFactoryInterface

createI2CKey, createPinKey, createSerialKey, createSpiKey, deviceClosed, deviceOpened, getDevice, isClosed, isDeviceOpened, reopen, start

Methods inherited from interface com.diozero.internal.spi.GpioDeviceFactoryInterface

provisionDigitalInputDevice, provisionDigitalInputOutputDevice, provisionDigitalOutputDevice

Constructor Details

PCF8574

public PCF8574(int controller,
int address)

PCF8574

public PCF8574(I2CDeviceFactoryInterface deviceFactory,
int controller,
int address)

Method Details

createDigitalInputDevice

public GpioDigitalInputDeviceInterface createDigitalInputDevice(String key,
PinInfo pinInfo,
GpioPullUpDown pud,
GpioEventTrigger trigger)
                                                         throws RuntimeIOException

Specified by:

createDigitalInputDevice in interface GpioDeviceFactoryInterface

Throws:

RuntimeIOException

createDigitalOutputDevice

public GpioDigitalOutputDeviceInterface createDigitalOutputDevice(String key,
PinInfo pinInfo,
boolean initialValue)
                                                           throws RuntimeIOException

Specified by:

createDigitalOutputDevice in interface GpioDeviceFactoryInterface

Throws:

RuntimeIOException

createDigitalInputOutputDevice

public GpioDigitalInputOutputDeviceInterface createDigitalInputOutputDevice(String key,
PinInfo pinInfo,
DeviceMode mode)
                                                                     throws RuntimeIOException

Specified by:

createDigitalInputOutputDevice in interface GpioDeviceFactoryInterface

Throws:

RuntimeIOException

setDirections

public void setDirections(int port,
byte directions)

Description copied from interface: GpioExpander

Set the directions for all pins on this port using the specified directions bit mask. 0 = output, 1 = input

Specified by:

setDirections in interface GpioExpander

Parameters:

port - the bank of up to 8 GPIOs

directions - bit mask specifying the directions for up to 8 GPIOs. 0 = output, 1 = input

getValues

public byte getValues(int port)

setValues

public void setValues(int port,
byte values)

Description copied from interface: GpioExpander

Set the output value for a pins on this port.

Specified by:

setValues in interface GpioExpander

Parameters:

port - the bank of up to 8 GPIOs

values - bit mask specifying on/off values. 1 = on, 0 = off

getValue

public boolean getValue(int gpio)

setValue

public void setValue(int gpio,
boolean value)

close

public void close()

Description copied from interface: DeviceFactoryInterface

Close this device factory including all devices that have been provisioned by it.

Specified by:

close in interface AutoCloseable

Specified by:

close in interface Closeable

Specified by:

close in interface DeviceFactoryInterface

Specified by:

close in interface GpioExpander

Overrides:

close in class AbstractDeviceFactory

setInputMode

public void setInputMode(int gpio)

setOutputMode

public void setOutputMode(int gpio)

getName

public String getName()

Description copied from interface: DeviceFactoryInterface

Get the name of this device factory

Specified by:

getName in interface DeviceFactoryInterface

Returns:

the name of this device factory

closePin

public void closePin(int gpio)

getBoardPinInfo

public BoardPinInfo getBoardPinInfo()

Description copied from interface: DeviceFactoryInterface

Get information about pins that can be provisioned by this device factory.

Specified by:

getBoardPinInfo in interface DeviceFactoryInterface

Returns: