STM32GENERIC/docs.md/usb_cdc.md

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## USB: Serial
There are two implementations of Serial communication: UART and USB.
This page describes the USB based.
Please check the [Menu option](menu_options#automatic-serial) to see which one is selected as `Serial`.
If the [USB menu](menu_options) is set to include Serial, SerialUSB is set as a virtual COM port, and can be used just like a regular UART based.
TODO explain windows 7 driver
Please refer to the [official documentation](https://www.arduino.cc/en/reference/serial) for
the description of Serial functions.