USB serial procedures, efficient and relatively small, the drawback is that not many of the practical function, but left the interface, interested, please slowly changed!

Packet : 67506231usbchuankouzhuanbingkou.rar filelist
usb转串口方案\usb232at90s.pdf
usb转串口方案\usb232.hex
usb转串口方案\usb232.c
usb转串口方案\read.htm
usb转串口方案\readme.txt
usb转串口方案

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