I havd a BeagleBone Black(mark RevB6 on PCB), and use bone-debian-10.3-iot-armhf-2020-04-06-4gb.img.xz as OS.
I found the board will add a COM device in Windows after connected P4(USB PC connector) with my PC, and I can login Debian by this COM port.
Is it possible to add a new COM device for this USB interface? it may seem like COM* in Windows, /dev/tty* in Debian. And this COM doesn’t need login function, it just use for application communication between my PC and BeagleBone Black board.