TTL Signals - Problem to communicate with an external equipment

[jarvis24]

Aurelie,

I don't think you are doing anything wrong. I think the problem is coming from a limitation on DirectRT (as well as MediaLab) v2008 and prior. The limitation has been (and still is) that port addresses greater than ~32000 can not be read as valid and so the values don't get sent. This is an issue we are working to overcome in the next version due out very soon. I've contacted Trevor who is working on this section of the 2010 version now to see if we will have this resolved in the coming weeks. The beta version for 2010 is available now to v2008 users but I am not sure yet if this particular issue has been fixed. It is unfortunate that add-on parallel port cards do generally not come with addresses less than 32000 (decimal). If you can set this as a parameter of your card, that ought to resolve it as well. If you *can* do that please let us know because there are other users in the same boat right now and this would be a nice immediate fix.

[aurelie Dommes]

Thank you for this information.
It is unfortunate that I cannot use the add-on parallel port card (with an address greater than 32000 decimal)... maybe in the future....
I don't know how to set this as a parameter of my card... and I don't even know if it is possible.
many thanks for your answer.
ps: I'm returning to the solution of keyboard press instead of using TTL signals of my button box....
Aurélie

[JEC]

UPDATE: As of about April 2010, this issue has been resolved in DirectRT 2008. Parallel port cards with addresses between 0 and 65,535 now work perfectly.