expyriment.io.MarkerOutput

class expyriment.io.MarkerOutput(interface, default_code=None, default_duration=None)

A class implementing a marker output.

__init__(interface, default_code=None, default_duration=None)

Create a marker output.

If a default code is specified, it will automatically be applied when send() is called without a code. If a default duration is specified, a 0 is sent automatically after the specified duration when send() is called without a duration.

Parameters:

interfaceexpyriment.io.SerialPort or expyriment.io.ParallelPort

the interface to use

default_codeint, optional

default code

default_durationint, optional

default duration (in ms) for sending 0 after a code

Notes

EEG/MEG systems: if the system is receiving the markers on a parallel port, the duration between sending a code an the subsequent 0 should be at least 1000/samplerate!

property default_code

Getter for default_code

property default_duration

Getter for default_duration

property interface

Getter for interface

property logging

Getter for logging.

send(code=None, duration=None)

Send a marker.

This sends a marker via the specified interface. If a duration is given, a 0 will be sent automatically after each code.

Parameters:

codeint, optional

a specific code

durationint, optional

duration (in ms) for sending a 0 after a code

Notes

For EEG/MEG systems: if the system is receiving the markers on a parallel port, the duration between sending a code an the subsequent 0 should be at least 1000/samplerate!

set_logging(onoff)

Set logging of this object on or off

Parameters:

onoffbool

set logging on (True) or off (False)

See also

expyriment.design.Experiment.set_log_level