SpaIot::Pcf8574Mux

Multiplexer controlled by a PCF8574. More...

#include <pcf8574mux.h>

Inherits SpaIot::ButtonController.

Public Member Functions
	Pcf8574Mux (uint8_t slaveAddress=0x20, TwoWire &bus=Wire, uint8_t idleValue=0xFF)
	Pcf8574Mux (const String &name, uint8_t slaveAddress=0x20, TwoWire &bus=Wire, uint8_t idleValue=0xFF)
virtual void	begin ()
virtual void	end ()
	It close the PCF8574 chip.
virtual int	select (int button)
virtual void	deselect ()
virtual bool	isNull () const
virtual bool	operator== (const ButtonController &other) const
virtual int	selected () const
virtual bool	isOpened () const
virtual bool	isSelected () const
virtual const String &	name () const
virtual bool	operator!= (const ButtonController &other) const

Static Public Member Functions
static bool	addToRegister (const String &name, ButtonController &controller)
static ButtonController &	getFromRegister (const String &name)
static bool	registerContains (const String &name)

Detailed Description

Multiplexer controlled by a PCF8574.

Inheriting from the ButtonController class.

Constructor & Destructor Documentation

Pcf8574Mux() [1/2]

SpaIot::Pcf8574Mux::Pcf8574Mux	(	uint8_t	slaveAddress = 0x20,
		TwoWire &	bus = Wire,
		uint8_t	idleValue = 0xFF
	)

It creates a new Pcf8574Mux object.

Parameters

slaveAddress	The address of the PCF8574 chip.
bus	The TwoWire object that is used to communicate with the PCF8574.
idleValue	The value that the pins will be set to when the device is not in use.

Pcf8574Mux() [2/2]

SpaIot::Pcf8574Mux::Pcf8574Mux	(	const String &	name,
		uint8_t	slaveAddress = 0x20,
		TwoWire &	bus = Wire,
		uint8_t	idleValue = 0xFF
	)

It creates a new Pcf8574Mux object.

Parameters

name	controller name
slaveAddress	The address of the PCF8574 chip.
bus	The TwoWire object that is used to communicate with the PCF8574.
idleValue	The value that the pins will be set to when the device is not in use.

Member Function Documentation

addToRegister()

static bool SpaIot::ButtonController::addToRegister ( const String &  name, ButtonController &  controller  )

staticinherited

Parameters

name
controller

Returns

begin()

virtual void SpaIot::Pcf8574Mux::begin ( )

virtual

It opens the PCF8574 chip.

deselect()

virtual void SpaIot::Pcf8574Mux::deselect ( )

virtual

It deselects the mux.

getFromRegister()

static ButtonController & SpaIot::ButtonController::getFromRegister ( const String &  name )

staticinherited

Parameters

name

Returns

isNull()

virtual bool SpaIot::Pcf8574Mux::isNull ( ) const

virtual

This function returns true if the object is a null pointer

Returns

The return value is a boolean value. The return value is true if the device is null, and false if the device is not null.

isOpened()

virtual bool SpaIot::ButtonController::isOpened ( ) const

virtualinherited

Returns

isSelected()

virtual bool SpaIot::ButtonController::isSelected ( ) const

virtualinherited

Returns

name()

virtual const String & SpaIot::ButtonController::name ( ) const

virtualinherited

Returns

operator!=()

virtual bool SpaIot::ButtonController::operator!= ( const ButtonController &  other ) const

virtualinherited

Parameters

other

operator==()

virtual bool SpaIot::Pcf8574Mux::operator== ( const ButtonController &  other ) const

virtual

This function is called when the ButtonController is compared to another ButtonController

Parameters

other

The ButtonController to compare against.

Returns

true if equal

registerContains()

static bool SpaIot::ButtonController::registerContains ( const String &  name )

staticinherited

Parameters

name

Returns

select()

virtual int SpaIot::Pcf8574Mux::select ( int  button )

virtual

It writes the value of the button to the PCF8574 chip.

Parameters

button

the button to be selected.

Returns

the value return by selected()

selected()

virtual int SpaIot::ButtonController::selected ( ) const

virtualinherited

Returns