STC89C52 single-chip platform and using outside communication with the PC to achieve USB communication is a keyboard function.

52USB
.....\Key.c
.....\Key.h
.....\Key.LST
.....\Key.OBJ
.....\mouse.h
.....\My_type.h
.....\PDIUSBD12.h
.....\UART.c
.....\UART.h
.....\UART.LST
.....\UART.OBJ
.....\USB.H
.....\UsbMouse
.....\UsbMouse.c
.....\UsbMouse.hex
.....\UsbMouse.lnp
.....\UsbMouse.LST
.....\UsbMouse.M51
.....\UsbMouse.OBJ
.....\UsbMouse.Opt
.....\UsbMouse.plg
.....\UsbMouse.Uv2
.....\UsbMouse_Opt.Bak
.....\UsbMouse_Uv2.Bak

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