expyfun.ParallelTrigger

class expyfun.ParallelTrigger(mode='dummy', address=None, trigger_duration=0.01, ec=None, verbose=None)

Parallel port and dummy triggering support.

Warning

When using the parallel port, calling expyfun.ExperimentController.start_stimulus() will automatically invoke a stamping of the 1 trigger, which will in turn cause a delay equal to that of trigger_duration. This can effect e.g. EyelinkController timing.

Parameters:

modestr

‘parallel’ for real use. ‘dummy’, passes all calls.

addressstr | int | None

The address to use. On Linux this should be a string path like '/dev/parport0' (equivalent to None), on Windows it should be an integer address like 888 or 0x378 (equivalent to None). The config variable TRIGGER_ADDRESS can be used to set this permanently.

trigger_durationfloat

Amount of time (seconds) to leave the trigger high whenever sending a trigger.

ecinstance of ExperimentController

The ExperimentController.

verbosebool, str, int, or None

If not None, override default verbose level.

Notes

Parallel port activation is enabled by using the trigger_controller argument of expyfun.ExperimentController.

close()

Release hardware interfaces.

stamp_triggers(triggers, delay=None, wait_for_last=True, is_trial_id=False)

Stamp a list of triggers with a given inter-trigger delay.

Parameters:

triggerslist

No input checking is done, so ensure triggers is a list, with each entry an integer with fewer than 8 bits (max 255).

delayfloat | None

The inter-trigger-onset delay (includes “on” time). If None, will use twice the trigger duration (50% duty cycle).

wait_for_lastbool

If True, wait for last trigger to be stamped before returning.

is_trial_idbool

No effect for this trigger controller.