USB Device no recognized

[Syed_Haque]

I have diymore stm32f407vgt6 board , I connect usb  give DEVICE NOT RECOGNIZED  if i try DFU mode BOOT0 >3.3V, BOOT1 > GND, I try  every thing  but nothing . please  help mee

[Gyessine]

Hello @Syed_Haque , and welcome to the ST Community,

First, you can refer to this article to improve your chances of finding a solution.
Could you provide more details about your schematic and the context of your project?
Gyessine

[Syed_Haque]

 I use stm32f407vgt6 board by DIYMORE  this is schematic. I try to make remote controller EDGETX radio transmitter.  the problem is when i pluged  usb and connect with microcontroller  desktop give warning notification  ( USB device not recognized) and check in device manager> Universal Serial Bus controllers  section showing Unkown USB device(Device descriptor request failed). try many thing and download many driver .still not work

 

 

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[TDK · Accepted solution]

This board has issues.

You'd be better off getting a nucleo board with a built-in programmer. Programming over the USB DFU connector is a recipe for disaster and unproductiveness.

Especially problematic:

PDR_ON shorted to both 3V3 and GND. (Pictures show both R6 and R7 are fitted.)

Also:

VDD not tied directly to VDDA.

ID pin of USB connector not tied to GND.

VCPA typo in schematic.

And my favorite, they have a typo in the silkscreen in the company name