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USB Device Problem.

Hi everybody;


I am writing a test program for USB device (CDC class) on STM32F407 With ARM MDK V5 IDE.
I'm using The USB-OTG-HS as FS (PB14 PB15); I used the deliverd examples by modifying the
PHY interface to ON chip full speed PHY.But no way to Make it Work: No enumeration
(Unrecognised Device IN Win10).Though the test works well with STM32CUBEIDE.
I tried evrything ; I need help.

Best regards
Chiali.