[solved] Problems with sending EEG triggers

Comments

• Daniel

  February 2016 edited 5:37AM

  Hi Lison,
  In this case it also helps to post the stack trace that is output when your program crashes. This can be found in the debug window of OpenSesame en is a history modules that were called and at which lines of code. This way, we have a more accurate estimate of where in the program things went wrong. With the information you provide above, it could be anything!

  
• Lison

  February 2016 edited 5:37AM

  Hi dschreij,
  Thank you for your answer. Here is the output found in the debug window when I used the parallel_port_trigger plug-in :

  In [1]: Starting experiment as ExperimentProcess-3

  FreeType import Failed: Freetype library not found
  openexp._canvas.psycho.init_display(): waitblanking = True
  openexp._canvas.psycho.init_display(): monitor = testMonitor
  openexp._canvas.psycho.init_display(): screen = 0
  openexp.sampler._legacy.init_sound(): sampling freq = 48000, buffer size = 1024
  openexp.sampler._legacy.init_sound(): mixer already initialized, closing
  experiment.run(): experiment started at Tue Feb 16 16:11:00 2016
  Sending value 0 for 500 ms to the parallel port on address: 0x378

  Unexpected error

  item-stack: experiment[run].new_loop[run].new_sequence[run].new_parallel_port_trigger_1[run]

  exception message: kb not found
  time: Tue Feb 16 16:11:00 2016
  exception type: AttributeError

  Traceback:

  File "dist\libqtopensesame\misc\process.py", line 140, in run
  File "dist\libopensesame\experiment.py", line 390, in run
  File "dist\libopensesame\item_store.py", line 95, in execute
  File "dist\libopensesame\item_store.py", line 110, in run
  File "dist\libopensesame\sequence.py", line 50, in run
  File "dist\libopensesame\item_store.py", line 110, in run
  File "dist\libopensesame\loop.py", line 144, in run
  File "dist\libopensesame\item_store.py", line 95, in execute
  File "dist\libopensesame\item_store.py", line 110, in run
  File "dist\libopensesame\sequence.py", line 50, in run
  File "dist\libopensesame\item_store.py", line 110, in run
  File "C:\Program Files\OpenSesame\plugins\parallel_port_trigger\parallel_port_trigger.py", line 122, in run
  File "dist\libopensesame\item.py", line 280, in getattr
  AttributeError: kb not found

  And when I use the inline_code :

  In [1]: Starting experiment as ExperimentProcess-4

  FreeType import Failed: Freetype library not found
  openexp._canvas.psycho.init_display(): waitblanking = True
  openexp._canvas.psycho.init_display(): monitor = testMonitor
  openexp._canvas.psycho.init_display(): screen = 0
  openexp.sampler._legacy.init_sound(): sampling freq = 48000, buffer size = 1024
  openexp.sampler._legacy.init_sound(): mixer already initialized, closing
  experiment.run(): experiment started at Tue Feb 16 16:12:51 2016
  experiment.run(): experiment finished at Tue Feb 16 16:12:57 2016
  done!

  In both cases, no trigger appeared in the Brain Recorder window, even if the experiment seemed to run normally when we used the inline_code. By the way, triggers worked with an E-Prime experiment with the same port address.

  Thanks a lot for your help !
• Daniel

  February 2016 edited 5:37AM

  If you check https://github.com/smathot/opensesame_plugin_parallel-port-trigger/blob/master/parallel_port_trigger/parallel_port_trigger.py at line 122 there is no instance of kb there that is incorrectly called, but I see kb being referenced at line 146. Given this discrepancy, I am wondering if you are using the latest version of the parallel port plugins or maybe still have an older one. Have you tried updating them with latest repository snapshot from https://github.com/smathot/opensesame_plugin_parallel-port-trigger/ Do that first and see if it helps. If not, we can look on.

  
• Lison

  February 2016 edited 5:37AM

  Thank you for your answer. We didn't found out how to make it work with the parallel port plug-in, even if we changed the parallel port plug-in version.
  The engineer of my lab found out a solution using the dportio.dll as it was described on OpenSesame tutorial, but this needed some modifications in the Brain Recorder system, and did not depend on Opensesame.
  In any case, thanks for your help !