[solved] Parallel port trigger stopping

Comments

• sebastiaan

  March 2016 edited March 2016

  HI Kobi,

  You need to specify the device that corresponds to the parallel port. You have specified /dev/parport0 (the default on non-Windows systems), but this device apparently doesn't exist on your system. So you will need to find out what the parallel port is called. What operating system are you using?

  Cheers,
  Sebastiaan

  
  
  Check out SigmundAI.eu for our OpenSesame AI assistant!
  
• kobi

  March 2016 edited March 2016

  Hi Sebastiaan,

  thanks for Your fast response!

  My operating system is Ubuntu 12.04 . I didn't specify the port as it was said in the instructions that the value for port in the parallel_port_trigger is ignored under Linux. If I do specify the port the error-text remains the same.

  UPDATE: TestBench (my EEG scanning software) listens to serial port triggers not parallel port if I understand it correctly (I can choose only from ttyS0 - ttyS31).
  Is there another way to produce serial port triggers in OpenSesame?

  UPDATE2:
  I tried to execute an inline_script item with following code:

  import serial
  exp.serial_port = serial.Serial('/dev/ttyS1',baudrate=19200, bytesize=serial.EIGHTBITS,stopbits=1)
  print(exp.serial_port.name)
  exp.serial_port.write(chr(1))
  exp.serial_port.close
  

  I can see /dev/ttyS0 in debug output window,
  but I can't see any trigger events in the EEG-software.

  any other ttySX return following error-text:

  Stopped
  
  The experiment did not finish normally for the following reason:
  
  Error while executing inline script
  
  Details
  
  - item-stack: `experiment[run].new_inline_script[run]`
  - exception type: `SerialException`
  - exception message: `Could not configure port: (5, 'Input/output error')`
  - item: `new_inline_script`
  - time: `Thu Mar 31 15:10:34 2016`
  - phase: `run`
  
  Traceback (also in debug window)
  
  .traceback
    File "/home/nkobelev/pythonTest/OpenSesame-release-3.0.7/libopensesame/inline_script.py", line 102, in run
      self.experiment.python_workspace._exec(self.crun)
    File "/home/nkobelev/pythonTest/OpenSesame-release-3.0.7/libopensesame/python_workspace.py", line 159, in _exec
      exec(bytecode, self._globals)
    File "", line 5, in 
    File "/usr/local/lib/python2.7/site-packages/serial/serialutil.py", line 177, in __init__
      self.open()
    File "/usr/local/lib/python2.7/site-packages/serial/serialposix.py", line 300, in open
      self._reconfigure_port(force_update=True)
    File "/usr/local/lib/python2.7/site-packages/serial/serialposix.py", line 332, in _reconfigure_port
      raise SerialException("Could not configure port: {}".format(msg))
  SerialException: Could not configure port: (5, 'Input/output error')
  
  
  

  Cheers,
  Niklas
• kobi

  April 2016 edited April 2016

  I think I've found a solution. Now I can send trigger events to serial port from OpenSesame and see them in TestBench. For the case someone else has same difficulties with TestBench and OpenSesame on Ubuntu:

  Step1: open terminal and create a pair of virtual ports with socat

  sudo socat PTY,link=/dev/ttyS10,b19200 PTY,link=/dev/ttyS11,b19200
  

  Step2: open another terminal and grant a read/write permissions for the new ports:

  sudo chmod o+rw /dev/ttyS10
  sudo chmod o+rw /dev/ttyS11
  

  Step3: open OpenSesame and create an inline_script item.
  in that item write:

  import serial
  s = serial.Serial('/dev/ttyS10',baudrate=19200,
        bytesize=serial.EIGHTBITS,stopbits=1)
  s.write(chr(1))
  s.close()
  

  Step4: open TestBench, go to marker->configure serial port and select the same port as You created with socat (ttyS11 in my case) and set bit per seconds to the same rate as you specified in socat (19200 in my case).

  That's It! Now as You execute the inline_script in OpenSesame You should see an event with a value=1 in TestBench.

  I hope it works for You too!

  Cheers,
  Niklas