The virtual power source based on TCP/IP protocol is implemented by C8051F020. C8051F020 is connected to LCD, keyboard, USB interface, Ethernet and LXI bus. The USB interface uses CH372 chip. On the computer side, the supporting software of CH372 provides a simple and easy-to-use operation interface. The general Windows driver provides a device-level interface and provides an API application layer interface through DLL. Communication with the local microcontroller is just like reading and writing files. The Ethernet interface uses W3100A to implement the functions of the transport layer, network layer, and data link layer, and uses RTL8201BL to implement the functions of the physical layer.
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