Class Pcx857x

Namespace

Iot.Device.Pcx857x

Assembly

Iot.Device.Pcx857x.dll

Base class for PCx857x GPIO expanders

public abstract class Pcx857x : GpioDriver

Inheritance

object

GpioDriver

Pcx857x

Derived

Pcx8574

Pcx8575

Constructors

Pcx857x(I2cDevice, int, GpioController, bool)

Remote I/O expander for I2C-bus with interrupt.

public Pcx857x(I2cDevice device, int interrupt = -1, GpioController gpioController = null, bool shouldDispose = true)

Parameters

device I2cDevice

The I2C device.

interrupt int

The interrupt pin number, if present.

gpioController GpioController

The GPIO controller for the interrupt. If not specified, the default controller will be used.

shouldDispose bool

True to dispose the Gpio Controller

Properties

Device

I2C device used for communication with the device

protected I2cDevice Device { get; }

Property Value

I2cDevice

Methods

AddCallbackForPinValueChangedEvent(int, PinEventTypes, PinChangeEventHandler)

Adds a handler for a pin value changed event.

protected override void AddCallbackForPinValueChangedEvent(int pinNumber, PinEventTypes eventTypes, PinChangeEventHandler callback)

Parameters

pinNumber int

The pin number in the driver's logical numbering scheme.

eventTypes PinEventTypes

The event types to wait for.

callback PinChangeEventHandler

Delegate that defines the structure for callbacks when a pin value changed event occurs.

ClosePin(int)

Closes an open pin.

protected override void ClosePin(int pinNumber)

Parameters

pinNumber int

The pin number in the driver's logical numbering scheme.

ConvertPinNumberToLogicalNumberingScheme(int)

Converts a board pin number to the driver's logical numbering scheme.

protected override int ConvertPinNumberToLogicalNumberingScheme(int pinNumber)

Parameters

pinNumber int

The board pin number to convert.

Returns

int

The pin number in the driver's logical numbering scheme.

Dispose(bool)

Disposes this instance

protected override void Dispose(bool disposing)

Parameters

disposing bool

True if explicitly disposing, false if in finalizer

GetPinMode(int)

Gets the mode of a pin.

protected override PinMode GetPinMode(int pinNumber)

Parameters

pinNumber int

The pin number in the driver's logical numbering scheme.

Returns

PinMode

The mode of the pin.

InternalReadUInt16()

Reads 16-bit unsigned integer from the device

protected ushort InternalReadUInt16()

Returns

ushort

16-bit unsigned integer read from the device

InternalWriteUInt16(ushort)

Writes 16-bit unsigned integer to the device

protected void InternalWriteUInt16(ushort value)

Parameters

value ushort

16-vit unsigned integer to be written to the device

IsPinModeSupported(int, PinMode)

Checks if a pin supports a specific mode.

protected override bool IsPinModeSupported(int pinNumber, PinMode mode)

Parameters

pinNumber int

The pin number in the driver's logical numbering scheme.

mode PinMode

The mode to check.

Returns

bool

The status if the pin supports the mode.

OpenPin(int)

Opens a pin in order for it to be ready to use. The driver attempts to open the pin without changing its mode or value.

protected override void OpenPin(int pinNumber)

Parameters

pinNumber int

The pin number in the driver's logical numbering scheme.

Read(PinValuePair[])

Reads multiple pins from the device

public void Read(PinValuePair[] pinValues)

Parameters

pinValues PinValuePair[]

Pins and values to be read

Read(int)

Reads the current value of a pin.

protected override PinValue Read(int pinNumber)

Parameters

pinNumber int

The pin number in the driver's logical numbering scheme.

Returns

PinValue

The value of the pin.

ReadByte()

Reads byte from the device

public byte ReadByte()

Returns

byte

Byte read from the device

RemoveCallbackForPinValueChangedEvent(int, PinChangeEventHandler)

Removes a handler for a pin value changed event.

protected override void RemoveCallbackForPinValueChangedEvent(int pinNumber, PinChangeEventHandler callback)

Parameters

pinNumber int

The pin number in the driver's logical numbering scheme.

callback PinChangeEventHandler

Delegate that defines the structure for callbacks when a pin value changed event occurs.

SetPinMode(int, PinMode)

Sets the mode to a pin.

protected override void SetPinMode(int pinNumber, PinMode mode)

Parameters

pinNumber int

The pin number in the driver's logical numbering scheme.

mode PinMode

The mode to be set.

Write(PinValuePair[])

Writes a value to a set of pins.

public void Write(PinValuePair[] pinValues)

Parameters

pinValues PinValuePair[]

Write(int, PinValue)

Writes a value to a pin.

protected override void Write(int pinNumber, PinValue value)

Parameters

pinNumber int

The pin number in the driver's logical numbering scheme.

value PinValue

The value to be written to the pin.

WriteByte(byte)

Writes byte to the device

public void WriteByte(byte value)

Parameters

value byte

Byte to be written to the device