How to generate a TDM file from embedded C application

[UKCraig]

Hi all,

I'm working on an embedded C application that will have logging capabilities.

Having worked with TDM files in the past I might like to use that rather than text/csv or a proprietary binary format.

Does a library of TDM functions exist in source form?
I've seen there's a DLL C API for Visual Studio but this isn't compatible for my embedded C application.

Thanks,

Craig

PS Feel free to move this topic to a more appropriate board but this seem most fitting

[AndreasK]

What does embedded mean in your case?

[UKCraig]

Hi AndreasK,

Thanks for the reply.

In my case I mean a microcontroller which is performing some closed loop control function.

I wish to collect data from it's inputs onto an sdcard for later analysis.

Regards,

Craig

[Brad_Turpin]

Hi UKCraig,

You could just write an interleaved (set of) binary file(s) with your embedded program, then create a matching TDM header file beforehand and/or afterwards with a Windows program.  We have TDM header file writing functions in DLL form.

Brad Turpin

DIAdem Product Support Engineer

National Instruments

[UKCraig]

Thanks Brad, that seems like a reasonable way forward, if no C library source exists.

I can find plenty of documentation for TDMS, but very little for TDM. Is there something like the TDMS File Format Internal Structure whitepaper for TDM?

Can you point me towards an example of pre/post TDM header writing?

Thanks,

Craig

[Brad_Turpin]

Hi Craig,

Shoot me an email.  I can send you an unsupported C++ library that will create TDM Header files.

Brad Turpin

DIAdem Product Support Engineer

National Instruments

brad.turpin@ni.com