An OpenSesame Plug-in for sending stimulus synchronization triggers through the parallel port to data acquisition systems.

Copyright, 2013, Bob Rosbag

Contributions: Code is based on the work of Per Sederberg. Debugged and polished by Edwin Dalmaijer.

1. About

In EEG/ERP studies it is common to send triggers to mark the timestamp for significant events (e.g., the onset of a trial, presentation of a particular stimulus, etc.). Triggers are typically bytes that are sent via the parallel port to data acquisition systems.

The plug-in has three options:

• Value is a positive integer between 0-255 and specifies the trigger byte
• Duration (ms) is a positive integer, 'keypress', or 'mouseclick', to wait respectively for a specified interval in milliseconds, until a key has been pressed, or until a mouse button has been clicked. It specifies the time the trigger is active.
• Port adress (Windows only) is the hexadecimal value of the parallel port in Windows. This setting is ignored in Linux.

Linux and Windows are supported (possible also OSX, not tested). For Windows the DLPortIO.dll driver is used to access the parallel port. Install options are listed below.

Installation instructions: http://osdoc.cogsci.nl/devices/triggers/

2. LICENSE

Parallel Port Trigger is distributed under the terms of the GNU General Public License 3. The full license should be included in the file COPYING, or can be obtained from

• http://www.gnu.org/licenses/gpl.txt

Parallel Port Trigger contains works of others. For the full license information, please refer to debian/copyright.

3. Documentation

Installation instructions and documentation on OpenSesame are available on the documentation website:

• http://osdoc.cogsci.nl/