byte_triggers.ParallelPortTrigger

class byte_triggers.ParallelPortTrigger(address, port_type=None, delay=10)

Trigger using a parallel port (also called LPT port).

Parameters:

addressint (hex) | str

The address of the parallel port on the system. If an Arduino to Parallel Port converter is used, the address must be the serial port address or "arduino" for automatic detection.

port_typestr | None

Either 'arduino' or 'pport' depending on the connection. If None, attempts to infers the type of port from the address.

delayint

Delay in milliseconds until which a new trigger cannot be sent. During this time, the pins of the LPT port remain in the same state.

Attributes

address	The address of the parallel port on the system.
delay	Delay (ms) to wait between two signal().
port_type	Type of connection port.

Methods

close()	Disconnect the parallel port.
signal(value)	Send a trigger value.

Notes

The address is specific to the system. Typical parallel port addresses are:

• On Linux:

  LPT1 = /dev/parport0
  LPT2 = /dev/parport1
  LPT3 = /dev/parport2
  

• On Windows:

  LPT1 = 0x0378 or 0x03BC
  LPT2 = 0x0278 or 0x0378
  LPT3 = 0x0278
  

• macOS does not have support for built-in parallel ports.

close()

Disconnect the parallel port.

This method should free the parallel or serial port and let other application or python process use it.

signal(value)

Send a trigger value.

Parameters:

valueint

Value of the trigger, between 1 and 255.

property address

The address of the parallel port on the system.

Type:

int | str

property delay

Delay (ms) to wait between two signal().

Type:

float

property port_type

Type of connection port.

Type:

str