USBFS not enumerating as VCP

[PShri.1]

Hello,

I m using an STM32F249I DISC1 board. I'm trying to start-off with a basic USB VCP loopback functionality. I generated the code for USBFS as a CDC Device (VCP) using CubeMx. I set the clock to 168MHz (so that USBFS is clocked at 48 MHz). I have also given appropriate Stack and Heap sizes. And I am using Windows 10.

However, the board doesn't enumerate as a VCP, in fact it isn't even detected on the bus (i.e. I don't see any activity on my PC).

What else can be the issue? Any code examples that I should refer to?

Thanks

[FBL · Accepted solution]

Hi @PShri.1 

According to the user manual, USB OTG host operation is realized once the Discovery is connected to the PC via the ST-LINK cable (mini USB). Once the USB OTG host device is detected and identified, then the USB ST-LINK cable can be removed.

You may try the example provided in Cube firmware dedicated to other classes just to make sure it's working.