这是一个对ARM9通用的LINUX ARM QT串口初始化设置,只要在自己的程序打开这个程序,及初始化数据结构,就可以读写出N个字节的串口数据-This is an ARM9 general-purpose LINUX ARM QT serial port initialization settings, as long as in their own program to open this program, and initialize data structures, you can read and write out the N bytes of serial data