Key up and Key down states not appearing in Matlab

[dinasherif]

Hello All,

I want to use the key up and down states in BCI2000 as I am trying to segment portions of the EEG signal based on user key presses. I have followed the instructions concerning "logging inputs" in the wiki: http://www.bci2000.org/wiki/index.php/U ... ging_Input which are:

1) rebuild the BCI2000 including the extensions
2) include in the batch file this option: --LogKeyboard=1

Now after running a session and storing the data in a .dat file, I tried opening it in Matlab to do some offline analysis, I use the load_bcidat function, the file is loaded successfully but in the states variable I can not find the key up and down states, Why is that? and is there something I am missing in the configuration??

Waiting for a reply and thanks,

-- Dina.

[mellinger]

Hello Dina,

for logging from the keyboard, it is not necessary to rebuild BCI2000 because the KeyboardLogger is included by default.

Please note that, when adding the --LogKeyboard=1 option to the batch file, it must be specified with the command that starts the source module. It will not work with other modules.

To make sure your configuration is correct, run the batch file, and choose View->States in the Operator module's main window menu. There, you should see whether the KeyUp and KeyDown states exist.

HTH,
Juergen

[dinasherif]

Thanks for your reply!

Actually it worked fine with me when I used the signal generator as the source module, but when I use the EMOTIV headset, the KeyUp and KeYDown states are not defined. I am using the same batch file but only changed the source module to emotiv.exe and the parameter file, that's it.
any idea why does this happen?

[mellinger]

This is really strange. I double-checked the configuration of the Emotiv source module, and found no difference to the SignalGenerator source module.

Could it be that you are using an older version of the Emotiv source module? Or did you compile it yourself, and accidentally removed the Keylogger component from the BCI2000FrameworkSrcModule project?

Unfortunately, the Emotiv module cannot be run without an Emotiv device, so I cannot try to reproduce your problem here.

Regards,
Juergen