PCF8574 input/output functions

Functions
bool	PCF::error ()
	Returns the last wrire or read status. More...
uint8_t	PCF::read ()
	Gets the corrent register information. More...
void	PCF::write (uint8_t value)
	Sets a value to a given register. More...
uint8_t	PCF::digitalRead (uint8_t port)
	Reads a given port content (HIGH or LOW) More...
void	PCF::digitalWrite (uint8_t port, uint8_t value)
	Writes HIGH or LOW in a given port (pin) More...

Detailed Description

Function Documentation

error()

bool PCF::error ( )

inline

Returns the last wrire or read status.

Return false when the last read or write operation is not ok

Returns

true or false

References PCF::io_error.

read()

uint8_t PCF::read

(

)

Gets the corrent register information.

Gets the current register content.

Returns

uint8_t current gpio value

References PCF::io_error.

write()

void PCF::write

(

uint8_t

value

)

Sets a value to a given register.

Sets a given 8 bit value to a given register.

Parameters

value

value (8 bits)

References PCF::io_error.

digitalRead()

uint8_t PCF::digitalRead

(

uint8_t

port

)

Reads a given port content (HIGH or LOW)

Returns the value or the bit in a given pin (port)

Parameters

port

Returns

uint8_t

digitalWrite()

void PCF::digitalWrite	(	uint8_t	port,
		uint8_t	value
	)

Writes HIGH or LOW in a given port (pin)

Turns a given port High or LOW

Parameters

port
value