Urgent !! How to set PCI-DIO-6533 to unstroded mode and use Ack1&2 as extra general purpose I/O lines??

[gon_no1]

Dear Experts:

How do I set PCI-DIO-6533 to unstroded mode, via either traditional NI-DAQ or DAQmx (I have version 7.1 and 8.0) and C ??

I need to use Ack1&2, Req1&2 and Stoptrig1&2 etc as extra general purpose I/O lines.

Please answer me at your earliest convenience.

Thank you very very much~

Best wishes,

David

[Otis]

Hi David,

I did a quick search online to see if I could find what you were looking for and I found the following KnowledgeBase which I think addresses the issues that you mentioned in your post:
KnowledgeBase 37GDGJMV: Using Control Lines of 653X Device as Extra Unstrobed Data Lines

Here is another that might be relevant:
KnowledgeBase 2V6EPM85 : Can I Perform Multiple Strobed And Unstrobed Operations Simultaneously On

Regards,

[gon_no1]

Dear Experts:

Thanks for your reply.

Port 4 did work as expected !!

However, I was wondering, do we need to set any registers or anything to explicitly tell the board that we are using "UNSTROBED MODE"?

please let me know, thanks a lot.  cheers

Best wishes,

David

[Otis]

Hi David,

When you set up your operations in software they automatically handle all of the lower level commands so that you don't have to spend as much time worrying about which bits and registers to set. 

Regards,

[Odd_Modem]

How do I do this with DAQmx? Each time I try it errors with resource already allocated. I am using NI-DAQ 7.5 and HSDIO 1.40. It seems like the user manual for the PXI-6534 refers only to traditional DAQ. Actually, I think there is a lot of room for improvement in national instruments documentation for this card. There are three different schemes for refering to ports, 0 based, 1 based and letter based. Too many spoons in the soup...

[Otis]

Hi,

With DAQmx there is no real worrying about configuration.  If you are using Unstrobed (Software Timing) Mode, then you can use Port 4 as a 4 bit read port and Port 5 as a 4 bit write port. 

If you attempt to configure anything with having clocks, then it will make those lines go into their regular PCLK, settings and Port 4 and Port 5 will not be available as read and write ports.  If you are using DAQmx then you do not have to worry about any of the tricks that you do with Traditional DAQ.  Once again proving that DAQmx is better and easier to use.

Have fun,