C# voidSet

摘要 电能表作为用电量的测量工具广泛的应用于各种场合。在电能表校表系统中,需要的最基本的输入信号源是高精度双路正弦信号源,并要求可对其频率、相位、幅值进行调节,来对电能表进行校准。 基于单片机的程控信号源设计，运用数字调相、数字调幅和数字调频等技术，要求实现相位、幅度、频率的高精度程控调节。本文设计了一种利用锁相环频率合成技术和数字波形合成技术组成的程控低频正弦波信号发生器，并给出了调幅、调频、调相的实用电路，频率调节通过改变8253计数器的分频系数来实现；相位调节由51单片机预置计数器的计数初值来完成，幅度的调整通过改变DAC1210II的参考电压来实现，使频率分辨率达0.01Hz,相位调节精度达0.1°，并介绍电路中的主要芯的功能及使用。输出正弦波频率和幅值的精度高，稳定性好，失真度低，电路简单、可靠、便于程控。 关键词：数字合成信号源；程控；调幅；调频；移相； (Abstract Meter consumption as the size of the measurement tool is widely used in various occasions. In single-phase power meter verify system, the most basic needs of the input signal is the source of two-way high-precision sine signal source, and may request its frequency, phase, amplitude in a certain step to adjust to the imitate of the actual electricity load with a right meter calibration. Design of the programmable signal supply controlled source，which based on the MCU，including digital phase adjustment，distal amplitude adjustment，digital frequency adjustment etc．The system should achieve high quality digital adjustment of phase, amplitude and frequency. This paper describes the use of a PLL frequency synthesizer technology, and digital wave form synthesis technology consisting of program-controlled low-frequency sine wave signal issued devices, and applies the amplitude， frequency， phase of practical circuit. Frequency can be adjusted through a change in the 8253 counter-frequ)

OllyDBG 实例教程 入门教程 OD入门教程包含实例(Getting Started Tutorial Tutorial OllyDBG instance)

基于TCP/IP协议的MFC网络编程实例，适合windows网络编程的初学者(MFC network programming example based on TCP/IP protocol, adaptive for whose who starts to learn Windows network programming.)

VC++ 6.0 MFC for Stock

模拟QQ2013登陆器并实现登陆密码的获取

嵌套向量中断控制器(NVIC)和处理器核的接口紧密相连，可以实现低延迟的中断处理和有效处理地处理晚到的中断(The NVIC and the processor core interface are closely coupled, which enables low latency interrupt processing and efficient processing of late arriving interrupts.)

实现了一个简单的brick shader(umolement a simple brick shader)

说明：  MVVM架构，实现登录+增删改查图书管理。适合新手学习(MVVM login + add, delete, modify and check book management)

在使用单片机控制一些模块时，常常要用到矩阵键盘，矩阵键盘也是非常常用的一个模块，因此掌握它的原理和使用方法是非常有助于我们开发一些实用模块的，这里将提供LY-K4矩阵键盘的原理和例程，该矩阵键盘为一个4x4的矩阵键盘。

哈夫曼编码  C++ 实现   控制台程序