bsl.triggers.ParallelPortTrigger

class bsl.triggers.ParallelPortTrigger(address, delay=50, *, verbose=True)

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

Parameters

• address (int (hex) | str) – The address of the parallel port on the system. If 'arduino', uses an Arduino to LPT converter. Design of the converter can be found here Arduino to ParallelPort converter.

• delay (int) – Delay in milliseconds until which a new trigger cannot be sent. During this time, the pins remains in the same state.

• verbose (bool) – If True, display a logger.info message when a trigger is sent.

Notes

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

• On Linux:

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

• On Windows, common port addresses:

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

• macOS does not have support for parallel ports.

Attributes

address

Port address.

delay

Delay to wait between two signal() call in milliseconds.

verbose

Methods

close()	Disconnects the parallel or serial port.
signal(value)	Send a trigger value.

property address

Port address.

Type

int | str

close()

Disconnects the parallel or serial port.

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

property delay

Delay to wait between two signal() call in milliseconds.

Type

float

signal(value)

Send a trigger value.

Parameters

value (int) – Value of the trigger.

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