这个程序是四通道的串口通信代码，点击通信开始时，自动从指定串口接收并显示数据，可实现串口的切换-This procedure is four-channel serial communication code, click on the beginning of communication, automatic from the specified serial port receive and display data, enabling the switch serial

MATLAB通过串口进行图像接收并显示，将图像灰度保存为.txt格式数据-MATLAB through the serial port receive and display the image