Black Box IEEE 1284 Guía de usuario descargar pdf (Pagina 53)

The Black Box Toolkit Page 53 of 98

We have now defined an event on the remote PC which we will “watch” for. If we see this

stimulus event occur, DSCAR will wait 300ms before simulating a response.

Finally we need to associate this stimulus event with a predefined response event from our

bank. To do this we simply choose a response event from the drop down box.

In this case we have chosen event one from our bank of possible responses. The first

number refers to the response ID, the next is the binary state of the four digital output

lines, the next is the port value in decimal and the final number is the response duration in

milliseconds. Once we are happy with the definition we click on “Append”. Again we are

free to edit rows as we see fit.

In the example shown we have pressed the “Append Row” button 10 times. In this case

we are going to look for a sequence of 10 bitmap presentations on the remote PC using

the opto-detector on line 3, wait 300ms after detecting the image onset and respond to

each one with a mouse down event that lasts for 150ms. As we detect each stimulus we

will move through the list of event IDs in the sequence.

It is important to remember that we are free to change both what we “look for” and what

response we make on an event by event basis. We are also free to add up to four SPMs

on any single presentation. For example we may decide to respond to detecting either a

bitmap presentation OR an auditory tone. We would do this by selecting “On” for line 1 as

well.

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Black Box IEEE 1284 Guía de usuario Pagina 53