Labeling EEG Triggers
Peter Quain
pquain at une.edu.au
Thu Feb 7 01:40:45 UTC 2013
An example using native parallel port (Decimal address = 88,
therefore Hex address 378) to send bytes to a NeuroScan system using
Hex notation (&H...), which would appear in NeuroScan .cnt file as
trigger codes 1 to 10:
' assess item level and send appropriate trigger code to NuAmps
If c.GetAttrib ("numobs") = 1 then
WritePort &H378, &H1
elseif c.GetAttrib ("numobs") = 2 then
WritePort &H378, &H2
elseif c.GetAttrib ("numobs") = 3 then
WritePort &H378, &H3
elseif c.GetAttrib ("numobs") = 4 then
WritePort &H378, &H4
elseif c.GetAttrib ("numobs") = 5 then
WritePort &H378, &H5
elseif c.GetAttrib ("numobs") = 6 then
WritePort &H378, &H6
elseif c.GetAttrib ("numobs") = 7 then
WritePort &H378, &H7
elseif c.GetAttrib ("numobs") = 8 then
WritePort &H378, &H8
elseif c.GetAttrib ("numobs") = 9 then
WritePort &H378, &H9
elseif c.GetAttrib ("numobs") = 10 then
WritePort &H378, &HA
End If
... here is a conversion tool:
http://easycalculation.com/hex-converter.php
At 12:23 PM 7/02/2013, you wrote:
>Hi All,
>
>I am using inline code (WritePort) in Eprime2 to send triggers from
>the test computer to an EEG computer.
>
>I would like to add a label to each trigger that specifies what type
>of trial that specific trigger is associated with (there are several
>levels to several variables). Does anyone have any insight for how I
>might go about doing this?
>
>Thank you in advance!
>M
>
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