E-prime 2 -trigger
Posted: Mon May 12, 2014 10:09 pm
I'm new to BIOSEMI and I'm just about to start an experiment using E-prime 2 Professional. I'm using the Task Event feature in E-prime, sending inputs through the parallel port.
I have used the task "writebyte" so far , and I can see the triggers tags in the "status" channel in Activeview. However, I can see that few ms before the tag, the "Status" channel shows activity, falling and then rising just before the tag. What I want to be sure is that the tag correspond to the time where the display computer is sending the input, i.e., to the onset of the stimulus that sends the trigger.
should I use the task "setbit" at the moment of the stimulus onset, i.e., set the pin to "high", and then "resetbit" at the end of the stimulus, i.e., set the pin to "low"?
thanks
I have used the task "writebyte" so far , and I can see the triggers tags in the "status" channel in Activeview. However, I can see that few ms before the tag, the "Status" channel shows activity, falling and then rising just before the tag. What I want to be sure is that the tag correspond to the time where the display computer is sending the input, i.e., to the onset of the stimulus that sends the trigger.
should I use the task "setbit" at the moment of the stimulus onset, i.e., set the pin to "high", and then "resetbit" at the end of the stimulus, i.e., set the pin to "low"?
thanks