第12章（/12/）BasicUSB.SchDoc电路原理图FX2Test/FX2Test.Uv2KeilC51工程FX2Test/EZUSB.LIBEZ-USB库文件FX2Test/dscr.a51USB描述符FX2Test/USBJmpTb.OBJUSB中断跳转表FX2Test/syncdly.h同步延时FX2Test/lpregs.h寄存器声明FX2Test/lp.hEZ-USB头文件FX2Test/fw.cC51主程序FX2Test/periph.c