Hand shaking between 2 6533 cards on one machine (as a test)

[N2STC]

Hi Folks and thanks for reading,

I have reached a frustration point with my 6533 DAQ cards. I have two cards installed in one machine, with windows NT. MAX does see and control them. I can make them talk to each other by connecting them together with a standard cable and using variations of the "Getting Started with Digital Input and Output" example. By incorporating two of these in one .vi, I can "walk 1s" through all 16 bits. "Buffered Pattern Input & output" also work.

However when I try the more sophisticated .vi's, such as "Write to One Digital Port on a 653x Device" (which I assume utilizes full hand shaking), I cannot read what I write. I have changed the polarity on the se
nding card's ACK & REQ lines.

Is there anything else I need to do?
Can I assume that since my walking 1s test works, that hand shaking is functioning?
Do you know of any .vi's that will help me other than the examples provided?

I would be most grateful for any help.

Best Regards,



Stan Cehonski KB2WEN
EP-5 Rm E5 MD49
Lockheed Martin http://www.lockheedmartin.com
PO Box 4840
Syracuse, NY 13221
Office 315 456-2412 fax 456-3363 home 829-2808
E'mail mailto:\\stan.cehonski@lmco.com

[Erin_B.]

Stan,

If you're referring to the "Write to One Digital Port..." example that ships with NI-DAQ, this VI does not implement handshaking. It uses the Port Write/Read VIs to perform static reads and writes to the 6533's digital ports.

For examples on how to use handshaking with this device, I would recommend investigating the Buffered Handshake I/O examples or the Word Handshake I/O examples. In general, you will need to implement the Group Write/Read VIs in order to perform any sort of timed or handshaked I/O with this board. For a good guide to Digital I/O in LabVIEW, I would suggest visiting www.ni.com/support/daq/devices/6533/.

Hope this helps.

Regards,
Erin