获取当前机器的COM口的数量，包括usb转换的串口

一个基于VC++的串口通讯的 小程序，有代码。可以作为串口通讯编程的入门程序。也可作为研究用。-a VC-based serial communications small program code. As serial communication programming entry procedures. Also can be used as research.

三菱PLC与PC通讯程序，只是简单做了试验，结果较好。-Mitsubishi PLC and PC communication program, but simply to do a test with satisfactory results.

上传个考勤系统,希望别人也能用.该代码只能算初级的东东,软件代码复用性不高,重复代码比较多.唯一感觉有点取鉴的可能就是端口和dll的连接,还有线程的使用,本想改一改,但是手头没有考勤机了,对应考勤机是890C的.-From a performance appraisal system, I hope others can use. The code can only count the primary Dongdong, software, code reusability is not high, repeat the code more. The only feeling a little check Kam is probably dll ports and connections, There are threads to use, simply wanted to, but do not have attendance machine, and the corresponding attendance machine is the 890C.

Delphi下串口通讯源代码(本人用的测试程序)-serial communication source codes based on Delphi(Test Program for myself)

串口通信的东东 串口通信的东东串口通信的-Dongdong serial communications serial communications serial communications Dongdong

usb通讯程序，用c语言实现，简单易懂,看完以后马上就能写出你自己的程序-USB program,c language realization,

串口编程（中文翻译版）----绝对经典书籍

DOS下，异步串口通信C代码，根据具体需要可裁减-DOS, asynchronous serial communication C code, according to the specific needs can be trimmed

fxa-interface 接口的vb程序plc-fxa-interface interface vb procedures plc

Symbian S603串口通信引擎程序-Serial port engine based on Symbian S60 3nd