Does anyone have some examples of Psychopy experiments that can generate EEG triggers on the viewpixx 3d system. Note - this is not the Viewpixx EEG system (which can generate TTL triggers if you put little rectangles in the corner of the screen). But instead we are trying to write to the EEG system (ANT Neuroscan) using the built in pypixlib functions. We have this working flawlessly in Matlab/Psychtoolbox using the Viewpixx-supplied function regwrrd but we’d like to transition to Psychopy if possible. We think we might be being bamboozled by the various possible combinations of python 2.x, 3.x / psychopy 2.x, 3.x / pypixlib 1.x 2.x etc - hence if someone can tell us about a configuration that definitely works it would be very helpful. OSX High Sierra Psychopy3 (we would also accept anything that worked under 2.7!). Standard Trying to achieve: Writing triggers to EEG amplifier using the datapixx interface on the Viewpixx 3D Some examples of things we have tried (and failed) #### Beginning of the first script #### import sys sys.path.append('/Users/tyrion/Documents/HaoTing/nbackmindwandering/src/pypixxlib-2.0.3917') from pypixxlib.datapixx import DATAPixx # **<<<<< We get an error here:** my_device = DATAPixx() din_state = my_device.din.getValue() # Start your experiment experiement_is_running = True while experiement_is_running: old_state = din_state my_device.updateRegisterCache() din_state = my_device.din.getValue() if old_state is not din_state: # Something triggered. # Now we want to check, for example, if pin 6 triggered. if (old_state & 2**6) is not (din_state & 2**6): print 'Pin 6 triggered!' experiement_is_running = False else: print 'Pin 6 is in the same state as before' # Finish your experiment #### End of the first script #### This is the error message we got: Exception has occurred: AttributeError dlsym(0x7fda9b9295d0, DPxSetPPxLedMask): symbol not found File “/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/ctypes/init.py”, line 383, in getitem func = self._FuncPtr((name_or_ordinal, self)) File “/Users/tyrion/Library/Python/2.7/lib/python/site-packages/pypixxlib/_libdpx.py”, line 7313, in setPPxLedMask = DPxDll[‘DPxSetPPxLedMask’] File “/Users/tyrion/Library/Python/2.7/lib/python/site-packages/pypixxlib/dpxDevice.py”, line 1, in from _libdpx import DPxUpdateRegCache, DPxSelectDevice, DPxGetID, \ File “/Users/tyrion/Library/Python/2.7/lib/python/site-packages/pypixxlib/datapixx.py”, line 1, in from dpxDevice import DpxDevice File “/Users/tyrion/Documents/MATLAB/VPixx_Software_Tools/pypixxlib/pypixxlib-3.4.4448/pypixxlib/dpxDevice.py”, line 5, in from pypixxlib.datapixx import DATAPixx File “/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/runpy.py”, line 72, in _run_code exec code in run_globals File “/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/runpy.py”, line 82, in _run_module_code mod_name, mod_fname, mod_loader, pkg_name) File “/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/runpy.py”, line 240, in run_path return _run_module_code(code, init_globals, run_name, path_name) This is the second script that we run in PsychoPy 2 (working with Python 2.7; the script is also attached to the letter as a separate .txt file). #### Start of the second script #### import sys sys.path.append('/Users/tyrion/Documents/HaoTing/nbackmindwandering/src/pypixxlib-2.0.3917') from pypixxlib.datapixx import DATAPixx import numpy as np myDevice = DATAPixx() # <<<<< We get an error here # However, in the error message, no line number was indicated. myDevice.writeRegisterCache() # Writes the registers with local register cache. myDevice.dout.setBitValue(0, 1) # 0 for instruction myDevice.writeRegisterCache() myDevice.close() #### End of the second script #### This was the error message we got: ERROR: Invalid device for current operation ERROR: Invalid device for current operation ERROR: Invalid device for current operation

[image] Please surround python code with backticks Other When you include python code on this forum please put triple “backticks” like this ``` on the line before and the line after your code. If you’ve done it correctly then your code will appear in a grey box with correct indentation like this (check the preview of your post on the right hand side before posting it) and other people will be better able to work out what might be right/wrong with your code. if myVal==True: break If you’ve already posted something that didn’t follow this rule th…

VPixx Viewpixx 3d - EEG triggers

Coding

Michael April 3, 2019, 12:19am 2

Topic		Replies	Views
Sending EEG triggers with viewpixx Builder vpixx	2	817	November 3, 2018
Send triggers using Display++ Builder screen , eeg	0	59	October 3, 2024
Sending triggers to brainvision EEG system from Psychopy coderview Coding	12	9282	September 20, 2023
How to send triggers to EEG (Neuroscan system)? Coding	7	5105	May 23, 2026
Adding EEG triggers to experiment Coding	9	10354	June 2, 2021

VPixx Viewpixx 3d - EEG triggers

Related topics