use TCPIP achieve Chat function procedures, sub

本文主要阐述了DTMF的原理及如何在MATLAB上产生DTMF信号，主要涉及到电话拨号音合成的基本原理及识别的主要方法，利用 MATLAB 软件以及 FFT 算法实现对电话通信系统中拨号音的合成与识别。并进一步利用 MATLAB 中的图形用户界面 GUI 制作简单直观的模拟界面。 能够利用矩阵不同的基频合成 0 － 9 不同按键的拨号音，并能够对不同的拨号音加以正确的识别，实现由拨号音解析出电话号码的过程，完成对电话拨号音系统的简单的实验仿真。-This paper described the principle and how DTMF in MATLAB to generate DTMF signals, mainly related to the telephone dial tone of the basic principles of synthesis and identification of the main methods, the use of MATLAB software and the FFT algorithm on the telephone communication system dial tone Synthesis and Recognition . And further the use of MATLAB in the production of graphical user interface simple and intuitive GUI interface simulation. Able to take advantage of matrix synthesis of different fundamental frequency 0- 9 different keys of the dial tone and be able to different dial tone to be the correct identification, the dial tone from a telephone number to resolve the process of completion of the telephone dial tone system, a simple experiment simulation

Comunicacion serial con la computadora para el PIC.

提供一个Socket封装接口,支持多线程及业务回调功能.-provide a package Socket interface, and supports multi-threaded business callback function.

基于MAX274的有源带通滤波器设计。有需要的朋友请下载-MAX274-based active bandpass filter design. Friend in need, please download

此文档是对WINDOWS核心编程进行了详细的补充介绍，希望对大家有所帮助-This document is the core programming WINDOWS carried out a detailed additional information on the hope that help to everyone

SECS I, SECS II协议通讯源码-SECS I, SECS II agreement communication source code

QAM星座图的原理和应用 QAM星座图的原理和应用-QAM constellation diagram of the principle and application of the principle of QAM constellation diagram and applications

P2P穿越防火墙 代码 ,作为P2P开发中的配套代码.-P2P Firewall traversal code, P2P development as the matching code. xxxxxxxxxxxxxxxxxxxxxxxxxx

gm2621的寄存器说明表及调试用到的gprobe-gm2621 register and gProbe file

某监控系统通过该OPC程序与SLC500/LOGIX5000 PLC通讯。有截图配置RSLinx Gateway方法。-A monitoring system with the adoption of the OPC procedure SLC500/LOGIX5000 PLC communications. There are screenshots to configure RSLinx Gateway method.