利用python开发一款跨平台的串口通讯程序，基于串口线程的异步通讯。实现自动查找可用串口，数据帧的异步接收，数据分析和图形显示，可作为硬件调试用的上位机软件。(Using Python to develop a cross platform serial communication program, asynchronous communication based on serial thread. Automatic lookup of available serial ports, asy