程序为D12的USB测试程序 main.c为主程序 D12.c为PDIUSBD12芯片操作子程序 usb,c为usb协议部分 isr.c为中断处理程序 包括定时器中断（没用）/INT0中断（单片机INT0脚与PDIUSBD12中断脚相连） hard.c为硬件底层程序，读写端口 mydev.c为我的设备请求程序-procedures for the testing procedure main.c USB mainly procedure

The Recent increase in popularity of wireless networks means that in most homes and offices computers, laptops, Smart phones and many more devices can connect to your network and the internet with no need for cables. Wifi Printers or “Wireless Printe