How to enable VBus pin sensing on STM32F479I Eval board ?

[Sankalp Agarwal]

I have the concerned evaluation board and working with the USB Device FS example.

I would like to know how to enable the VBus sensing pin on this board.

As per the page 36 of the user's guide of this board, SB72 needs to be removed to use PA9 as VBus for USB_FS1:

https://www.st.com/content/ccc/resource/technical/document/user_manual/group0/13/58/70/d6/78/da/4f/20/DM00219352/files/DM00219352.pdf/jcr:content/translations/en.DM00219352.pdf

But this does not help.

We probed PA9 pin and observed that the voltage is remaining at 5 v when USB is not connected and the voltage is getting reduced to 0 v when USB is connected.

Can you please provide some suggestions regarding it ?

Thanks

[Tesla DeLorean]

You'll need to trace the circuit on the board, checking the JP14 jumpers, thru D5 and CN13

Not a board I have. Discuss with the FAE supporting your account.