使用AVR Mega8单片机实现USB协议，将mega8单片机模拟成USB HID控制器，用以实现USB键盘功能。开发环境为WINAVR，文件包含硬件原理图及软件源程序。-The use of USB MCU AVR Mega8 agreement to mega8 microcontroller emulates USB HID controller to achieve the USB keyboard functionality.