这个是8253芯片的两个实例程序，对学习接口的人是有一定帮助的...

计算机接口技术系列 Visual C++串口通信技术与工程实践 在编译本章程序后，请将winio.dll、winio.vxd和winio.sys文件复制到可执行文件所在目录下, 否则WinIo库初始化函数initializeWinIO调用将会失败。-computer interface technology Series Visual C serial communications technology and engineering practice in compiling this chapter procedures, I would be grateful if winio.dll, winio.vxd winio.sys reproduction of documents and executable files to the directory, otherwise WinIo library initialization function initializeWinIO call will fail.

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windows串口编程入门-entry windows Serial Programming

非常好的串口通信程序,VC工程,只需要在此基础上稍做修改就可以加入到你自己的程序中-very good serial communication program, VC works only on this basis can be tailored to your own accession process

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一个串口通信的源码，以2进制形式实现传输，可以传输图像等各种文件。-a serial communication source to the form of two-band transmission, transfer images and other documents.

非常好用的一个串口通讯包,里面有完整的例程,用起来非常方便,本程序由网上得来,与大家共享,我很少用VS自带的串口控件-very handy in a serial communications package, which has complete routines, very convenient for them to use the procedures come from the Internet, and share, I seldom use VS onboard Serial Control

visual c6.0实现的窜口通讯，窜口输入输出接受程序简单测试，可以运用到工程中-visual c6.0 I realize the channeling communications, input and output channeling I accept the simple test procedure can be applied to engineering

串行通信C语言代码,用于DOS下编程,比较完整-serial communication C language code for DOS programming, a more comprehensive

SIM300 TCPIP Application Notes 英文手册，希望对您有用 -SIM300 TCPIP Application Notes English manual, want to be useful for you