通过串口实现pc跟开发板通信，开发板商店后会有一个界面，街面上有小键盘，点击小键盘输入数据，之后点击发送，会在pc端串口调试助手哪里收到数据，反之，会在开发板上接收到数据-Pc via serial port to communicate with the board, after the store will have a development board interface, the streets have a keypad, click on the keypad to enter d