I'm trying to use CubeMX to generate code for a STM32L4 Discovery board. I'm trying to get a virtual com port working over the user usb port, not the usb st-link. I can't manage to get this to work. I have the drivers installed on my PC host, and it recognizes the st-link as a VCP, but not the user usb port. In my CubeMX project I have enabled the USB_DEVICE as a Communication Device Class (Virtual Port Com). I've also enabled USART3, and set up the solder bridges per the user manual (SB24 and 25. What am I missing? Is there an existing example for the STM32L4?