CSerialIO实现一个对串口读写的类，有一个线程负责处理对串口数据的读写，只需要简单调用CSerialIO提供的API就可以侦听串口的数据。 -CSerialIO implement a class to read and write the serial port, there is a thread responsible for handling read and write data to the serial port, simply provide the API call