max232部分程序，pdf文件，串口调试助手.-MAX232 some of the procedures, pdf file, serial debugging aides.

MEI（美国）/Conlux的MDB官方通讯协议Version3.最新版本。包含所有MDB命令收发的格式。英文pdf文件。-MEI (United States)/Conlux the MDB official communication protocol Version3. The latest version. Contains all commands sent and received MDB format. English pdf file.

基于vc++串口的开发，详细介绍了其原理以及其实例！ 里面为pdf文件。-Vc++ serial port on the development, details of its principles and its practice! Inside the pdf file.