数字通信仿真，BPSK AM QPSK等通信方式的仿真源程序。

串口通讯的MFC类 -MFC class for serial communication

mscomm组件问题的FAQ-FAQ MSComm component issues

ppi协议分析，整理了ppi协议的读写格式，强制IO，一次读多条数据等内容-ppi protol

symbian中询问对话框生成的源代码 适合初学者使用。-symbian ask dialog box to generate the source code for beginners to use.

viterbi 约束长度为7的仿真，适用于DAB等卷积编码译码的仿真-viterbi constraint length 7 of the simulation, applicable to DAB decoding such as convolutional coding simulation

通信原理的所有公式 考研用的，大家可以下来参考-Communication principle of all formulas used in PubMed, we can down the reference

软电话 从功能分为：服务器端和客户端 服务器：记录所有客户的信息，对客户的登陆、注销等请求进行响应 客户端：利用UDP协议与服务器和被叫或主叫客户端进行通讯 点对点通讯中的请求和响应消息是通过SIP协议来完成传输的，音频信息（压缩后）是同构RTP协议来完成传输的-Soft phone functionality is divided into: server-side and client-server: a record of all customer information, customer landing, write-offs, such as in response to client requests: the use of UDP protocol with the server and the called or caller client communication point of point communication in the request and response messages through the SIP protocol to complete the transmission, audio information (compressed) is isomorphic RTP protocol to complete the transmission

二维码生成的源码，包含所用的库，自动生成二维码，以bmp格式保存于c盘下，可修改所需要生成的信息，测试可用~

/*CHECKED * Function: time.c Project: DNP * * * * DESCRIPTION: * * This file contains functions for converting between * DNP time format and RTU time format (rtc counter type). * * DNP format is to express the time in the number of milliseconds * since the start of 1970. * * * REVISION HISTORY: * * Num Modified by Date Reason * --- ----------------------- --------- ------------------------------- * * */ -/*CHECKED * Function: time.c Project: DNP * * * * DESCRIPTION: * * This file contains functions for converting between * DNP time format and RTU time format (rtc counter type). * * DNP format is to express the time in the number of milliseconds * since the start of 1970. * * * REVISION HISTORY: * * Num Modified by Date Reason * --- ----------------------- --------- ------------------------------- * * */