一个串口通讯类和用这个类编写的一个例子程序, 一个很好的串口例子， 可以一窥串口编程的奥秘， 希望对大家有帮助。-A serial communication class and use this type of an example of the preparation process, a very good example of the serial port, you can learn about the mysteries of serial programming, I h