Counter events under C++ and NI-DAQ 6.9

[Heuristics]

Hello,

I need to get every counter value (frequency about 6Khz) from a PCI-6052E by NI-DAQ interface (program must response quickly depending on each counter value). I can't use Config_DAQ_Event_Message() because it doesn't provide a callback event for counter, then windows thread is used with GPCTR_Watch(), but it brings polling (even with the use of Sleep(0)).

Another approch to eliminate my problem of polling?

Thanks a lot,
Heuristics

[Nick-W]

Heuristics,
One thing you should consider is using buffered event counting. (there are examples showing you how to implement it.) In buffered event counting, you have a hardware signal connected to the counter gate. Each time an active edge occurs on the gate, the couter value is saved into a buffer. You can then read this buffer once you are done, or continually while the program is running. You can use your second counter to generate the gate pulse train.

Nick W.
National Instruments
www.ni.com/ask