% Trigger test for EEG-FMRI BrainProducts system using NYUAD Vpixx system % Author: Hadi Zaatiti % A dictionary in the first cell gives all the codes for each type of % marker, you can use this dictionary in your experiment script clear all close all global screen; global tc; global isTerminationKeyPressed; global resReport; global totalTime; global VPIXX_USE; VPIXX_USE = true; %% % To make a marker S2 appear on the EEG data we must activate pin number 3 % on the 25-pin D-Sub as in Table 1 below % To activate the pin number 3, we need to activate the Digital Out 4 on % the Datapixx % To activate the Digital Out 4, we need to send this combination 00000100 -> 4 % Using Datapixx('SetDoutValues', 4); % Pinout of the trigger socket (digital port) on USB2 Adapter on the % EEG-FMRI trigger box % +-----------------------------------------------------+ % | Pin on 26-pin HD D-Sub | Function | 25-pin D-Sub/LPT on | BNC connector on | % | trigger socket (digital | | trigger cable | trigger cable | % | port) | | | | % +-----------------------------------------------------+ % | 1 | Ground | 25 | Ground | % | 2 | D01 (S 2) | 3 | | % | 3 | D03 (S 8) | 5 | | % | 4 | D05 (S 32) | 7 | | % | 5 | D07 (S128) | 9 | | % | 6 | D09 (R 2) | | | % | 7 | D11 (R 8) | | | % | 8 | D13 (R 32) | | | % | 9 | D15 (R128) | | Signal | % | 10 | Unused | | | % | 11 | Unused | | | % | 12 | VCC +3.3 V | | | % | 13 | Unused | | | % | 14 | D00 (S 1) | 2 | | % | 15 | D02 (S 4) | 4 | | % | 16 | D04 (S 16) | 6 | | % | 17 | D06 (S 64) | 8 | | % | 18 | D08 (R 1) | | | % | 19 | D10 (R 4) | | | % | 20 | D12 (R 16) | | | % | 21 | D14 (R 64) | | | % | 22 | Ground | 1 | | % | 23 | Block+ | | | % | 24 | Block- | | | % | 25 | 5 kHz out | | | % | 26 | Unused | | | % +-----------------------------------------------------+ % Table 3: Digital output pin assignment from Vpixx system towards EEG-FMRI % trigger Box % +--------------------+--------------------+--------------------+-------------------+ % | Pin | Description | Pin | Description | % +--------------------+--------------------+--------------------+-------------------+ % | 1 | Digital Out 0 | 14 | Digital Out 1 | % | 2 | Digital Out 2 | 15 | Digital Out 3 | % | 3 | Digital Out 4 | 16 | Digital Out 5 | % | 4 | Digital Out 6 | 17 | Digital Out 7 | % | 5 | Digital Out 8 | 18 | Digital Out 9 | % | 6 | Digital Out 10 | 19 | Digital Out 11 | % | 7 | Digital Out 12 | 20 | Digital Out 13 | % | 8 | Digital Out 14 | 21 | Digital Out 15 | % | 9 | Digital Out 16 | 22 | Digital Out 17 | % | 10 | Digital Out 18 | 23 | Digital Out 19 | % | 11 | Digital Out 20 | 24 | Digital Out 21 | % | 12 | Digital Out 22 | 25 | Digital Out 23 | % | 13 | GND | Shield * | Shield | % +--------------------+--------------------+--------------------+-------------------+ % * Shield is tied to the GND by a 0 Ohm resistor inside the DATAPixx system. %% Summary dictionary of trigger code trig_dict = containers.Map; trig_dict('S1') = 2^2; trig_dict('S2') = 2^4; trig_dict('S3') = 2^4+2^2; trig_dict('S4') = 2^6; trig_dict('S5') = 2^6+2^2; trig_dict('S8') = 2^8; trig_dict('S16') = 2^10; trig_dict('S32') = 2^12; trig_dict('S64') = 2^14; trig_dict('S128') = 2^16; trig_dict('S255') = 2^24-1; %% Saving for global use in other script of the trigger dictionary % Save the dictionary to a .mat file after any modification of the above or % adding new marker save('trig_dict.mat', 'trig_dict'); %% Disable Vpixx Pixel Model incase it is already enabled Datapixx('Open') Datapixx('SetPropixxDlpSequenceProgram', 0) Datapixx('DisablePixelMode') Datapixx('RegWr') %% if VPIXX_USE % datapixx init datapixx = 1; AssertOpenGL; % We use PTB-3; isReady = Datapixx('Open'); Datapixx('StopAllSchedules'); Datapixx('RegWrRd'); % Synchronize DATAPixx registers to local register cache end %% Get TTL number of bits it should be 24 bits % Show how many TTL output bits are in the Datapixx HitKeyToContinue('Press any key to see the Datapixx TTL output number of bits'); nBits = Datapixx('GetDoutNumBits'); fprintf('\nDATAPixx has %d TTL output bits\n\n', nBits); Datapixx('SetDoutValues', 0); Datapixx('RegWrRd'); %% All Triggers test % Bring 1 output high HitKeyToContinue('Hit any key to bring all digital output to 1:'); Datapixx('SetDoutValues', (2^nBits) - 1); Datapixx('RegWrRd'); % Bring 1 output high HitKeyToContinue('Hit any key to bring all digital output to 0:'); Datapixx('SetDoutValues', 0); Datapixx('RegWrRd'); % In MRI we have a 25-pin D-Sub cable so we care about this column % Trigger S2 marker by activating the 3rd pin of the 25-pin D-sub cable % The 3rd pin corresponds to digital output 4 on the vpixx system % 4 in binary is 0100 % In MRI we have a 25-pin D-Sub cable so we care about this column % Trigger S2 marker by activating the 3rd pin of the 25-pin D-sub cable % The 3rd pin corresponds to digital output 4 on the vpixx system % 4 in binary is 0100 % Binary numbers with a single 1 over 8 bits and their decimal equivalents: % 00000001 -> 1 % 00000010 -> 2 % 00000100 -> 4 % 00001000 -> 8 % 00010000 -> 16 % 00100000 -> 32 % 01000000 -> 64 % 10000000 -> 128 % EEG Marker trigger script % DOUTValues = 0 % DOUTValues = 1 % DOUTValues = 2 --> nothing active % DOUTValues = 4 --> bit number 0 is activated % DOUTValues = 5 --> bit number 0 is activated coz 5 = 101 % DOUTValues = 8 --> nothing active % DOUTVALUES = 16 --> bit 1 is activated % Bits on Vpixx % Bit 0 on BP needs bit 2 on Vpixx % Bit 1 on BP needs bit 4 on Vpixx % Bit 2 on BP needs bit 6 on Vpixx % Bit 3 on BP needs bit 8 on Vpixx % Bit 4 on BP needs bit 10 on Vpixx % Bit 5 on BP needs bit 12 on Vpixx % Bit 6 on BP needs bit 14 on Vpixx % Bit 7 on BP needs bit 16 on Vpixx %% Marker test % Set total duration (in seconds) to run the loop totalDuration = 10; % e.g., 30 seconds % Set pause duration (in seconds) between each instruction pauseDuration = 2; % e.g., 2 seconds %% S1 Marker Works % Should trigger S1 marker on EEG %HitKeyToContinue('\nHit any key to bring the EEG S2 marker on:'); tic; Datapixx('SetDoutValues', 0); Datapixx('RegWrRd'); while toc < totalDuration Datapixx('SetDoutValues', trig_dict('S1')); Datapixx('RegWrRd'); disp('S1 Marker On'); pause(pauseDuration); Datapixx('SetDoutValues', 0); Datapixx('RegWrRd'); disp('triggers off'); pause(pauseDuration); end %% S2 Marker Works tic; Datapixx('SetDoutValues', 0); Datapixx('RegWrRd'); while toc < totalDuration Datapixx('SetDoutValues', trig_dict('S2')); Datapixx('RegWrRd'); disp('S2 Marker On'); pause(pauseDuration); Datapixx('SetDoutValues', 0); Datapixx('RegWrRd'); disp('triggers off'); pause(pauseDuration); end %% S3 Marker Works tic; Datapixx('SetDoutValues', 0); Datapixx('RegWrRd'); while toc < totalDuration Datapixx('SetDoutValues', trig_dict('S3')); Datapixx('RegWrRd'); disp('S3 Marker On'); pause(pauseDuration); Datapixx('SetDoutValues', 0); Datapixx('RegWrRd'); disp('triggers off'); pause(pauseDuration); end %% S4 Marker Works tic; Datapixx('SetDoutValues', 0); Datapixx('RegWrRd'); while toc < totalDuration Datapixx('SetDoutValues', trig_dict('S4')); Datapixx('RegWrRd'); disp('S4 Marker On'); pause(pauseDuration); Datapixx('SetDoutValues', 0); Datapixx('RegWrRd'); disp('triggers off'); pause(pauseDuration); end %% S5 Marker Works tic; Datapixx('SetDoutValues', 0); Datapixx('RegWrRd'); while toc < totalDuration Datapixx('SetDoutValues', trig_dict('S5')); Datapixx('RegWrRd'); disp('S5 Marker On'); pause(pauseDuration); Datapixx('SetDoutValues', 0); Datapixx('RegWrRd'); disp('triggers off'); pause(pauseDuration); end %% S8 Marker Works tic; Datapixx('SetDoutValues', 0); Datapixx('RegWrRd'); while toc < totalDuration Datapixx('SetDoutValues', trig_dict('S8')); Datapixx('RegWrRd'); disp('S8 Marker On'); pause(pauseDuration); Datapixx('SetDoutValues', 0); Datapixx('RegWrRd'); disp('triggers off'); pause(pauseDuration); end %% S16 Marker Works tic; Datapixx('SetDoutValues', 0); Datapixx('RegWrRd'); while toc < totalDuration Datapixx('SetDoutValues', trig_dict('S16')); Datapixx('RegWrRd'); disp('S16 Marker On'); pause(pauseDuration); Datapixx('SetDoutValues', 0); Datapixx('RegWrRd'); disp('triggers off'); pause(pauseDuration); end %% S32 Marker Works tic; Datapixx('SetDoutValues', 0); Datapixx('RegWrRd'); while toc < totalDuration Datapixx('SetDoutValues', trig_dict('S32')); Datapixx('RegWrRd'); disp('S32 Marker On'); pause(pauseDuration); Datapixx('SetDoutValues', 0); Datapixx('RegWrRd'); disp('triggers off'); pause(pauseDuration); end %% S64 Marker Works tic; Datapixx('SetDoutValues', 0); Datapixx('RegWrRd'); while toc < totalDuration Datapixx('SetDoutValues', trig_dict('S64')); Datapixx('RegWrRd'); disp('S64 Marker On'); pause(pauseDuration); Datapixx('SetDoutValues', 0); Datapixx('RegWrRd'); disp('triggers off'); pause(pauseDuration); end %% S128 Marker Works tic; Datapixx('SetDoutValues', 0); Datapixx('RegWrRd'); while toc < totalDuration Datapixx('SetDoutValues', trig_dict('S128')); Datapixx('RegWrRd'); disp('S128 Marker On'); pause(pauseDuration); Datapixx('SetDoutValues', 0); Datapixx('RegWrRd'); disp('triggers off'); pause(pauseDuration); end %% S255 Marker Working tic; Datapixx('SetDoutValues', 0); Datapixx('RegWrRd'); while toc < totalDuration Datapixx('SetDoutValues', trig_dict('S255')); Datapixx('RegWrRd'); disp('S255 Marker On'); pause(pauseDuration); Datapixx('SetDoutValues', 0); Datapixx('RegWrRd'); disp('triggers off'); pause(pauseDuration); end if VPIXX_USE if ~parameters.isDemoMode % datapixx shutdown Datapixx('RegWrRd'); Datapixx('StopAllSchedules'); Datapixx('Close'); end if ~parameters.isDemoMode % datapixx shutdown Datapixx('RegWrRd'); Datapixx('StopAllSchedules'); Datapixx('Close'); end end