DIO-96 callback

[davew]

The PCI-DIO-96 allows enabling each 82C55 chip to generate an interrupt on a positive-going transition on one of two C-port I/O lines configured for input. Is it possible to get NI-DAQ (or Visa?) to call my app's callback function (or send a message) when these interrupts occur? I don't want to do any block transfers, which is all I found in the documentation for getting NI-DAQ to call my callback. I just want my app to be notified of the positive transition event. Thanks!

Dave W.

[Bill B]

Unfortunately, the interrupt functionality of the PCI-DIO-96 is not supported through NI-DAQ or VISA. The functionality is only accessible via Register Level Programming. Please see Appendix B of the PCI-DIO-96 User Manual.

[davew]

So, that means I have to write my own device driver? Yuck! Seems like NI should add this capability to NI-DAQ.