DataAdapter

步进电机是将电脉冲信号转变为角位移或线位移的开环控制电机，是现代数字程序控制系统中的主要执行元件，应用极为广泛。。在非超载的情况下，电机的转速、停止的位置只取决于脉冲信号的频率和脉冲数，而不受负载变化的影响，当步进驱动器接收到一个脉冲信号，它就驱动步进电机按设定的方向转动一个固定的角度，称为“步距角”，它的旋转是以固定的角度一步一步运行的。可以通过控制脉冲个数来控制角位移量，从而达到准确定位的目的；同时可以通过控制脉冲频率来控制电机转动的速度和加速度，从而达到调速的目的。(Stepper motor is an open loop control motor which transforms electrical pulse signal into angular displacement or linear displacement. It is the main executive element in modern digital control system, and is widely applied. In the case of non overloaded, the motor speed and stop position depends only on the pulse frequency and pulse number, regardless of load changes, when the stepper driver receives a pulse signal, it drives stepper motor to set the direction of rotation of a fixed angle, called "step", it is the rotation of the fixed point of the operation step by step. We can control the angular displacement by controlling the number of pulses, so as to achieve the goal of accurate positioning. At the same time, we can control the speed and acceleration of motor rotation by controlling the pulse frequency, so as to achieve the purpose of speed regulation.)

锁相环用于电机转速精准检测，资料很不错，值得下载(Phase-locked loop for accurate detection of motor speed)

基于keil软件的51单片机程序，18B20测温及12864液晶显示的文件。晶振为12M(Based on the the keil software 51 microcontroller procedure 18B20 temperature measurement and 12864 LCD file. Crystal-12M)

说明：  描述了AD9850、AD9851、AD9854、AD9833的调试心得(Describes the AD9850, AD9851, AD9854, AD9833 debugging experience)

单片机内刻录程序，包含C语言和汇编语言两个版本。实现7455C5与单片机的串口通信，信息传输。(Microcontroller burning program, contains two versions of the C and assembly language. 7455C5 microcontroller serial communication, information transfer.)

12C5A60S2 EEPROM 的读写操作(12C5A60S2 EEPROM read_write)

一款webQQ登陆的小程序，可以登陆并发表文字说说，图文混合说说，设置说说可见权限。涉及WinHttp知识，spidermonkey脚本引擎知识(WebQQ landed a small program, you can log in and post text talk, text and graphics to talk about, talk about the visible set permissions. Involving WinHttp knowledge, spidermonkey scripting engine knowledge.)

c8051f020单片机的12864液晶显示 4行汉字 很简单的改变(c8051f020 microcontroller 12864 LCD 4 lines of Chinese characters is very simple change)

libimobiledevice VS2008 可编译代码 需要自行编译openssl-1.0.1l (libimobiledevice VS2008 code can be compiled Need to compile openssl-1.0.1l)

XListCtrl控件源码，一个很有用的列表扩展控件(CListCtrl control source, a useful list expansion control)