<div dir="ltr">Hello Forum,<div><br></div><div>I am having a little bit of trouble with my USB relay setup. Essentially, I have a USB 4-relay board which I using to communicate between E-prime and Biosemi.</div><div>My plan is to timestamp in the EEG recording when the stimulus event is being shown. My current script is the following (which just opens and closes the USB relay):<br></div><div><br></div><div>This in-line is immediately before the stimulus presentation:</div><div>----------------------------------</div><div><div>Dim arrDataa(2) As Integer</div><div><br></div><div>arrDatag(0) = 255</div><div>arrDatag(1) = 1</div><div>arrDatag(2) = 1 </div><div><br></div><div>Serial.WriteBytes arrDataa</div></div><div>---------------------------------</div><div><br></div><div>Following by the Stimulus presentation</div><div><br></div><div>Then, this in-line is immediately after the stimulus presentation:</div><div><br></div><div>----------------------------------<br></div><div><div><div>Dim arrDatab(2) As Integer</div><div><br></div><div>arrDatag(0) = 255</div><div>arrDatag(1) = 1</div><div>arrDatag(2) = 0 </div><div><br></div><div>Serial.WriteBytes arrDatab</div></div><div>---------------------------------</div></div><div><br></div><div>The script works nicely and is able to time-stamp into the Biosemi recording. The problem is that while it works perfectly for when the <span style="line-height: 18px;">trigger code is sent (lets say a 64 time-stamp appears in the trigger of Biosemi), when I 'stop' the trigger (after the stimulus is presented), there is a time-stamp of 64 with a zero underneath in the Biosemi recordings. This is problematic for when I try to analyse the EEG data because </span><span style="line-height: 18px;">all of the start and stop events are saved as the same 64 time-stamps (it ignores the zero
below the 64 in the 'stop' time-stamp condition) and therefore, the 'stop' is considered the same event as the initiation of the time-stamp. </span></div><div><span style="line-height: 18px;"><br></span></div><div><span style="line-height: 18px;">I contacted Biosemi and they told me that the issue is with the scripting in E-prime. I was wondering if anyone had any suggestions for how to fix this problem? </span></div><div><span style="line-height: 18px;">It would be much appreciated!!</span></div><div><span style="line-height: 18px;"><br></span></div><div><span style="line-height: 18px;">I hope I have been clear?</span></div><div><span style="line-height: 18px;"><br></span></div><div><span style="line-height: 18px;">Thank you for your help.</span></div><div><span style="line-height: 18px;"><br></span></div><div><span style="line-height: 18px;">Kind regards,</span></div><div><span style="line-height: 18px;">Jodie</span></div><div><br></div><div><br></div><p class="MsoPlainText"><o:p></o:p></p></div>
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