Data Acquisition Idea Exchange

It would be great to develop software on 64bit Linux sytem using DAQmx.

Since we`re developing software for 64bit Linux this is a must for us - this means a 64bit Kernelmodule as well as 64bit libraries.

It has come up a few times from customers, and I wanted to gauge interest and solicit ideas on how this should work.

Currently, with the built-in TDMS logging support, if you want to change to a new file in the middle of logging, you need to stop the task and start again.  For some use cases, this isn't practical (for example, http://forums.ni.com/t5/LabVIEW/Why-the-TDMS-file-is-larger-than-it-should-be/m-p/1176139#M511099).

The question is: How would you like to specify the "new file" behavior and what are your use cases?

For instance, a couple ideas to get the ball rolling:

1. Add an interval attribute like "Change file after n samples".   We would then auto-increment the file name and change to that file when we have logged "n" samples.
2. Make file path attribute changeable at runtime.  We have a file path attribute for logging.  The idea here would be to support changing the file path "on the fly" without stopping and starting the task.  The problem here is that it would not suit very well a use case where you want a specific file size.  Additionally, it wouldn't be as easy to use as #1; it would be more flexible though.
3. (Any additional ideas/use cases?)

Thank you for your input!

Andy McRorie

NI R&D