Windows Management Instrumentation

[menchar]

Does anyone have experience using WMI to enumerate com ports from CVI?

Thanks for any info anyone can provide.

Menchar

[Shawn_S.]

Hi menchar,

I looked for some example code to accomplish this, but unfortunately I could not find anything.  However, other engineers here may have experience with WMI and C or LabWindows CVI, so I would check this forum again after some time. Ultimately, WMI is Microsoft's product and your best bet is to contact them to find out the correct commands in C.  Their forums may quickly be able to explain the commands you will need.

All the best on your project!

[menchar]

Well, getting info on a C interface from Microsoft isn't always easy.

This would seem to be a general issue for any CVI app that needs to interact with the PC HW, is there some other way to enumerate the installed com ports from a CVI application?

Thanks.

Menchar

[Wolfgang]

Hi,

I assume you are aware of the code snippet by msaxon given here 

and the possibility to use viFindRsrc ( resource_manager_handle, "ASRL[0-9]*::?*INSTR", &find_handle, &return_count, instrument_descriptor );

But somehow I missed why these approaches don't work in yor case?

Wolfgang

[menchar]

We're trying to port some existing VB code that is set up to use WMI - otherwise we wouldn't bother with it.

[menchar]

And we're looking for a string returned from WMI that identifies a particular port as being a USB to UART bridge (Silicon Labs CP210x), we have code that can retrieve this string from WMI but not any other way that we know of now.

[Wolfgang]

Bob,

sorry if I am wasting your time, but would it be possible to use VISA with viGetAttribute (,VI_ATTR_MANF_ID,)?

[menchar]

I'll forward this and see if it works, it's another engineer that has the problem ...

Thanks for your interest.

Bob