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本程序可以在MFC中打开并显示一张图片，代码比较简单基础(Open and display a picture in MFC)

利用机智云的STM32带ESP8266开发板接入贝壳物联，再通过贝壳物联的APP进行数据下发，最终由STM32按接收到的数据对LED灯进行控制

说明：  LED1以500ms的频率闪烁(定时器 TIM2 产生定时)(LED1 flashes at 500ms (timer TIM2 generates timing))

语法分析，和编译原理课程配套，可以输出错误原因。输入通过读文件。(Syntax analysis, and compiler theory course package, you can output the wrong reasons. Input by reading the file.)

光电式编码器程序,此程序可实现光电式编码器的位置读取(Photoelectric encoder program, which can read the position of photoelectric encoder)

实现了melpe的简单功能实现,可以根据这个来实现melpe源码的基本功能

脱机通讯开发包.可以支持VC,VB及多种编程语言.(err)

键盘扫描,4*4矩阵键盘,外接89s51串行口输出-keyboard scan, 4* 4 matrix keyboard, external serial port output 89s51

基于DEM的三维地形绘制，通过四叉树实现LOD细节层次结构(DEM-based three-dimensional terrain rendering by Quadtree LOD hierarchy details)

双音多频 DTMF（Dual Tone Multi Frequency），双音多频，由高频群和低频群组成，高低频群各包含4个频率。(Dual-tone multi-frequency signaling (DTMF) is used for telecommunication signaling over analog telephone lines in the voice-frequency band between telephone handsets and other communications devices and the switching center. The version of DTMF that is used in push-button telephones for tone dialing is known as Touch-Tone. It was developed by Western Electric and first used by the Bell System in commerce, using that name as a registered trademark. DTMF is standardized by ITU-T Recommendation Q.23. It is also known in the UK as MF4.)