串口自发自收，便于调试，使用vsap虚拟串口，mfc版。 有源代码和可执行程序以及汉化版的串口虚拟器安装软件(不需要真实串口连接也可以)，程序简单，有详细注释-Serial spontaneous self-closing, easy to debug, use vsap virtual serial port, mfc version. Source code and executable programs, as well as the finished version, seri