Using Port C I/O lines in handshaking mode

[Mike_Swann]

I am trying to use the spare I/O lines of port C as unstrobed output lines on a PXI6508, while using port A and B for block read inputs. The manual says it is possible, but I read that NI-DAQ 6.9 did not support that function. I have upgraded to NI-DAQ 7 but still do not seem to be able to to it. Is there an easy solution?

[Russell]

This is technically possible in that the 8255 chip supports it, but this functionality is not supported through the NI-DAQ driver. 7.0 or previous. I don't believe there are any plans to add support for it either. The easiest thing is just to add another DIO board to your system. The only other route involves register-level programming which is certainly not easy! We also do not support register-level programming. There is only documentation which you can look into if you like. See the Measurement Hardware DDK.

http://sine.ni.com/apps/we/nioc.vp?cid=11737〈=US

Russell
Applications Engineer
National Instruments
http://www.ni.com/support

[Mike_Swann]

Thank you Russell.
Your suggestion of using another DIO board is probably the easiest solution.

Regards

Mike