M series DAQ change detection

[smehta]

I need help!

Does anyone know if NI has a version of the DAQmx driver(or any DAQ driver) that supports change detection/notification for M-Series(6259)?

My application needs to be notified when an edge occurs on a digital input, and then setup(one of 8 arbitrary waveforms) and trigger a function generator.

From reading other posts, I can see that Daqmx and traditional NI-DAQ 7.3 drivers dont support this feature on M-Series devices. Has a new version of these drivers been realeased? How can they sell DAQs that don't have software support for such an important feature?

Can anyone suggest a work around?

I need to somehow notify my software(DLL written in C++ running on a relatively fast XP machine) that an edge has occured. Speed is an issue. I have 15-25ms between when the edge occurs and the function generator output should be valid.


Any ideas would be appreciated

[Salvador_Santolucito]

Hi smetha,

Unfortunately, change detection is not yet available on the M-series boards. This is something that may be available in furture NI-DAQ drivers (however it is not yet supported in DAQ 7.4).

Depending on your application, you may be able to simply use the analog output or analog input's triggering capabilities to solve the problem. Both AI and AO can start or stop their tasks based on the edge of a digital trigger.

If you tell me more specific information about your application, I may be able help with a solution.

Thanks,
Sal