DigitalIO Class Reference

Digital I/O operations on a device. More...

Public Member Functions
bool	read_input_bit (self, int port)
	Reads a single input port from the device.
int	read_input_group (self, int group)
	Reads a group of input ports from the device.
bool	read_output_bit (self, int port)
	Reads a single output port from the device.
int	read_output_group (self, int group)
	Reads a group of output ports from the device.
None	write_output_bit (self, int port, bool value)
	Writes a single output port to the device.
None	write_output_group (self, int port, int value, int mask=0xFFFFFFFF)
	Writes the output group to the device.

Properties
	input_count = property
	int: Gets the number of digital input ports of the device.
	output_count = property
	int: Gets the number of digital output ports of the device.

Detailed Description

Digital I/O operations on a device.

Member Function Documentation

read_input_bit()

bool read_input_bit	(		self,
		int	port )

Reads a single input port from the device.

Parameters

port : int Port index to read.

Returns

bool True for input high state, false for low.

read_input_group()

int read_input_group	(		self,
		int	group )

Reads a group of input ports from the device.

Parameters

group : int Group index to read.

Returns

int State of the requested ports mapped to a 32 bit integer.

read_output_bit()

bool read_output_bit	(		self,
		int	port )

Reads a single output port from the device.

Parameters

port : int Port index to read.

Returns

bool True for output high state, false for low.

read_output_group()

int read_output_group	(		self,
		int	group )

Reads a group of output ports from the device.

Parameters

group : int Group index to read.

Returns

int State of the requested ports mapped to a 32 bit integer.

write_output_bit()

None write_output_bit	(		self,
		int	port,
		bool	value )

Writes a single output port to the device.

An output group consists of 32 single ports. Non existent ports are ignored. Therefore there is more than one output group, if the output_count is larger than 32.

Parameters

port : int Port index to write.

value : bool Value of port state.

write_output_group()

None write_output_group	(		self,
		int	port,
		int	value,
		int	mask = 0xFFFFFFFF )

Writes the output group to the device.

An output group consists of 32 single ports. Non existent ports are ignored. Therefore there is more than one output group, if output_count is larger than 32.

Parameters

port : int Port index to write.

value : int Bits of port states.

mask : int Bit mask for the bits being actually set to the ports (by default all bits are set).