Parallel port communication - need help

[Daniela Pfabigan]

Hi,

try the following lines

Stimulus.OnsetSignalEnabled = True
 
Stimulus.OnsetSignalPort = &H378
  
Instruktion.OnsetSignalData = c.GetAttrib("Type") 




Place this inline just before the object 'Stimulus'.

Cheers,
Daniela



Shivani R schrieb:
> Hi,
>
> I am designing an experiment using E Prime. In this experiment an
> image comes up on the screen, the subject has to make a decision if
> the image was a target or distractor. I need to send a trigger at the
> instant when the picture comes up on the screen. Also I need to send a
> trigger to say if it was a target or distractor image. I have been
> trying to do this but not getting it the way I want. The trigger is
> coming at the instant the fixation comes up on the screen whereas I
> want the trigger at the instant the picture comes up on the screen. I
> read some previous posts on the same topic and tried putting my logic
> in the same way but to no use.
>
> Right now I am using the following code:
>
> "Fixation" is the object which displays the fixation and "Stimulus" is
> the object which displays the picture. I have two parallel ports
> avaialble in my PC - &H378 and &HCCE0. In the TrialList I have an
> attribute named as "Type" which tells if the image is a target or
> distractor.
>
> Inline1 is as follows:
>
> Stimulus.OnsetSignalEnabled = True
> Stimulus.OnsetSignalPort = &H378
> Stimulus.OnsetSignalData = &H01
>
> Inline2 is as follows:
>
> If c.GetAttrib("Type") = Target Then
> WritePort &HCCE0, 1
> ElseIf c.GetAttrib("Type") = Distractor Then
> WritePort &HCCE0, 2
> End If
>
> The main problem I am facing is regarding the position of the inline
> script. Right now I have placed the Inline1 just before the Stimulus
> object and Inline2 just after the Stimulus object. Please let me know
> where I am going wrong in the placement of the  inline script. Any
> help is really appreciated.
>
>
> Regards
> Shivani
>
>   




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