Unknown USB Device in Windows - VISA does not see it

Hello,
I'm trying to connect my STM microcontroller to my computer using USB protocol and VISA software. When I plug STM USB device into USB port Windows sees it as unknown device and can not find any driver for it. I assume that this is situation VISA was created for. So I want to use a driver wizard to create driver for this device, but VISA does not display it in a device list. I tried to create and install driver for my device as if it was not connected, and installed created driver manually but it did not work.
Is it possible that Windows detects a USB device and VISA can't see it?

It actually depends what sort of USB device it should be. If it is a COMM USB class device, Windows should be able to pick it up directly as serial port, if it is some proprietary USB class, then you either have to get a driver installed and access that driver somehow, or create an INF file with the VISA driver wizard for it and write the driver yourself in LabVIEW using the VISA USB Raw interface. Without a very good description of the low level USB protocol however this last option is a complete no go.
If the VISA driver wizard doesn't display the device in the list then Windows has already claimed it somehow.
Rolf Kalbermatter
CIT Engineering Netherlands
a division of Test & Measurement Solutions

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