Qt编写串口通信程序全程图文讲解，首先说明我们的编程环境是windows xp下，在Qt Creator中进行，如果在Linux下或直接用源码编写，程序稍有不同，请自己改动-Qt graphics throughout the preparation of serial communication program to explain, first, our programming environment is under windows xp, carried out in the Qt Cr