usb接口的80c51控制程序，包括上位机和单片机程序。调试通过，可以控制p1口的八位电平状态，p2口接收，状态在上位机程序可以显示。-usb interface 80c51 control procedures, including the host computer and microprocessor programs. Debugging through, you can control the level of p1 mouth of the eight states, p2 I re