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STM32F103C8 USB Unknown Device Problem

Question asked by Mucit23 on Jul 27, 2017
Latest reply on Aug 2, 2017 by Imen D

Hi friends

 

I am trying to make usb hid connection with STM32F103C8. I was able to compile the USB Library via the KEIL Compiler. The processor is running. After the USB init routines, the processor goes to the main program. And when I make the USB connection, I get the error that the "USB Unknown Device"

USB connection as shown

STM32F103 USB Connection

 

My project file is attached.  Can someone review the project?

What causes this problem?

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