Send Trigger to EEG using E-Prime Professional 2.0

[David McFarlane]

Paul,

Good catch on the screenshot -- more importantly, it shows they use 
EP2.0.10 Pro (as you know, Task Events got introduced with that 
version).  Yes, in that case they should use Task Events instead of 
Onset/OffsetSignal, and the thread linked earlier goes into that a 
bit.  Moreover, if they want to reset the bit based on an offset from 
the OnsetTime, then they should use an event of 
<stimulus>.OffSetTime, and an appropriate value for Delay.

Good catch on the If..Then line, I completely overlooked that!

Finally, I find the new default of "(same as duration)" a great 
improvement, once properly understood and managed.  But there is room 
for a difference of opinion on that :).

Best regards,
-- David McFarlane


At 10/21/2013 01:43 PM Monday, Paul Groot wrote:
>PS. The screendump shows that you are using EP2 pro. This version 
>allows you to specify triggers using Task Events on Trigger1 instead 
>of the OnsetSignal-properties. In that case you SHOULD define a 
>ParallelPort device first.
>
>PS2: David also pinpoints an annoying issue with EP2: PreRelease is 
>set to 'same as duration', which might result in zero-duration triggers...
>
>Paul
>
>
>On 21 October 2013 19:37, Paul Groot 
><<mailto:pfc.groot at gmail.com>pfc.groot at gmail.com> wrote:
>The script looks fine, but are you sure that c.GetAttrib("Target")=1 
>evaluates to true? Just add a debug line to check if the 
>if-statements runs as expected:
>
>Debug.print "Target"
>
>Also notice that value 128 corresponds to the highest bit of the 8 
>datalines. Also, adding the ParallelPort device is not required when 
>using this trigger mechanism because you directly send data to the 
>data register of the printer port. I'm not sure, but this might even 
>give problems when the the LPT mode is not correctly set.
>
>cheers
>Paul
>
>
>
>
>
>On 21 October 2013 12:43, Piercarlo Mauri 
><<mailto:piercarlo.mauri at gmail.com>piercarlo.mauri at gmail.com> wrote:
>Hi,
>I need E-Prime to send triggers to my EEG signal recorded with 
>BrainAmp. The trigger cable is connected from the parallel port to 
>the BrainAmp (in windows the resource tab of the LPT1 port says: 
>Interval I/O 0378-037F, Interval I/O 0778-077F). In E-Prime I added 
>the parallel port on LPT1 to the devices used. I need that in a 
>series of numbers (with attribute "Target") that will be shown for 
>100ms in the slide "Target1", when will appear the number 1, a 
>trigger should be send to my EEG recording... I created an Inline 
>script (the one called Trigger) with this command:
>
>----------------------
>If c.GetAttrib("Target")=1 Then
>    Target1.OnsetSignalEnabled=True
>    Target1.OnsetSignalPort=&H378
>    Target1.OnsetSignalData=128
>
>    Target1.OffsetSignalEnabled=True
>    Target1.OffsetSignalPort=&H378
>    Target1.OffsetSignalData=0
>
>End if
>---------------------
>
>But it doesn't work, anyone can help me? I attached a screen of the 
>sequence of my exp.
>Thank you
>PM

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