主程序检测有按键按下则通过USB端口发送"This is BW-DK5483" , 可将开发板USB接口与PC连接，PC上运行串口大师等串口调试软件，　打开USB串口接收并观察开发板发送数据，也可由PC端发送数据至开发板,开发板将接收数据发回PC(The main program detects a button press through the USB port to send "This is BW-DK5483", the USB development board is connected with the PC interface, PC serial port operation master serial debugging software, open the USB serial port to receive and observe the development board to send data, but also by the end of the PC to send data to the development board, the board will receive data back to the PC)