USB鼠标的制作 K1:鼠标左移 K2:鼠标右移 K3:鼠标上移 K4:鼠标下移 K5:滚轮下滚 K6:滚轮上滚 K7:左鼠标键 K8:鼠标右键 程序下载完成后可以使用串口调试助手观察枚举过程。波特率为9600。-USB mouse, making K1: Mouse left K2: Mouse shifted to the right K3: Mouse Move K4: Mouse Down K5: Wheel Roll down K6: wheel on the rol