包含两篇关于FXO、FXS的文档，详细介绍了他们的区别和定义，是开发VOIP设备的很好的参考材料。这种材料可是很难找哦。...

该文件内含两个文件，一个是串口调试助手，另一个是用VC编写串口调试助手的源程序，对串口调试助手及其实现原理感兴趣的，是一个很有用的资料。-The document contains two papers, one is the serial debug assistant, and the other is used to prepare serial debug VC source assistants, assistant to the serial debug and realize the principle of interest is a very useful information.

关于串口通信的，用C++编写的代码，能够实现相关设备和计算机的通信，比如实现三维罗盘和计算机的通信，可以获得三个角度值

资源描述使用wechatpy登录微信企业号，实现部门获取，信息发送的简单示例，基于微信企业号。。

LDPC已经成为现在很流行的FEC码，这是一篇讲述QC-LDPC编码的经典论文，作者是IEEE终身会员林舒，对目前常用的QC-LDPC编码作了详尽的描述-LDPC has become very popular now FEC code, this is a QC-LDPC code on a classic paper, the author is IEEE Life Member LIN Shu, on the current commonly used QC-LDPC coding detailed description of

一套餐饮收费管理系统源代码，通过计算机串口读写IC卡设备。-a Food Management System source code, through the computer serial port IC card reader equipment.

自己写的记录AD值的一个小软件可以运行成功，用VB写的，对这方面有需要的人可以做个参考-himself wrote the record value of the AD a small software can run successfully, written in VB, these are people in need can be a reference

nothing to say! It is only the necessar file to be enabled to download other important file for my studies.

fd_set参数：一个用于检查可读性（readfds），一个用于检查可写性（writefds），另一个用于例外数据（exceptfds）。从根本上说， fd_set数据类型代表着一系列特定套接字的集合-fd_set parameters : a check for readability (readfds) one could write a check for (writefds) Another exception for the data (exceptfds). Fundamentally speaking, fd_set data types represent the range of specific set of socket

一篇详细介绍高速数据调制解调技术，主要以QPSK信号为例，包括解调和定时，挺好的-A detailed introduction of high-speed data modem technology, mainly as an example QPSK signals, including demodulation and timing, very good

功能丰富的串口通讯程序，界面类似Telix -Serial communication example with abundant functions, whichs ui is like to Telix