C8051F020双串口使用程序，可实现单片机与PC或其他设备间串行交互通信,C8051F020 dual serial port to use the program can achieve single-chip microcomputer with the PC or other serial interactive communication between devices

本程序是基于单片机C8051F020上使用SL811 USB 总线接口实现检测U 盘的功能。插上U 盘，能正确识别U盘,在串口调试助手上观察结果。,This procedure is based on the C8051F020 to use single-chip bus interface SL811 USB detection U disk function. Plug U disk, U disk to correctly identify the serial debugging as