STM32F411CE Black Pill USB example

in STM32CubeMX

RCC HSE Crystal
Connectivity : USB_OTG_FS, Mode Device_Only
Middleware : Class For FS IP, Virtual Port Com
GPIO PC13 as output for LED

Fixing ST-Link debug problem

Edit configuration / Debugger / Show generator options => Software System Reset

Fixing USB port error

Error : Unable to open connection to COMX Unable to configure serial port
Fix applied in this repo in USB_DEVICE\App\usbd_cdc_if.c : https://community.st.com/s/question/0D50X00009Xke3ESAR/usb-vcp-windows-10

References