Philips PCF8574 [Other]

Files
file	PCF8574-driver.h
	Philips PCF8574 IO MUX driver.
Defines
#define	PCF8574_I2C_ADDR   0x70
Functions
bool	PCF8574sendBytes (tSensors link, ubyte _byte)
bool	PCF8574readBytes (tSensors link, ubyte &_byte)
Variables
tByteArray	PCF8574_I2CRequest
tByteArray	PCF8574_I2CReply

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Detailed Description

Philips PCF8574

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Define Documentation

#define PCF8574_I2C_ADDR   0x70

HDMMUX I2C device address

Definition at line 40 of file PCF8574-driver.h.

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Function Documentation

bool PCF8574readBytes	(	tSensors	link,
		ubyte &	_byte
	)

Read the current state of the ports on the PCF8574

Parameters:

link	the PCF8574 port number
_byte	the byte thats been read

Returns:

true if no error occured, false if it did

Definition at line 75 of file PCF8574-driver.h.

bool PCF8574sendBytes	(	tSensors	link,
		ubyte	_byte
	)

Send a byte to the PCF8574 to set the IO ports

Parameters:

link	the PCF8574 port number
_byte	the byte to be sent

Returns:

true if no error occured, false if it did

Examples:

PCF8574-test1.c.

Definition at line 57 of file PCF8574-driver.h.

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Variable Documentation

tByteArray PCF8574_I2CReply

Array to hold I2C reply data

Definition at line 44 of file PCF8574-driver.h.

tByteArray PCF8574_I2CRequest

Array to hold I2C command data

Definition at line 43 of file PCF8574-driver.h.