通过正则表达式，对自定义的公式进行解析，允许公式中有自定义变量...

多线程下载工具（有悬浮窗），VC++开源代码下载，多线程下载工具的源码。(Multi-threaded downloading tool (with floating windows), VC++ source code download, multi-threaded downloading tool for source code.)

说明：  基于GMAP.CORE,GMAP.DATA进行自定义改造。 增加了图层处理，测试工具，下载工具。(gmap customize version, layer, tools, download)

VC++编写的聊天程序。可在局域网内进行聊天。界面清晰(VC++ to prepare the chat program. Can be carried out in the local area network chat. Clear interface)

Windows画图白板源码 C#-whiteboard drawing Windows source code C#

STM32单片机，采用数字相关法测量两路波的相位差，内含工程，进行了模拟数据测试通过，稍微修改即可使用，并附上了理论文档。(STM32 microcontroller, using digital Correlation Method for Measuring the phase difference between two waves, including engineering, tested by simulated data, you can use slightly modified, with a theoretical document.)

data structur stack, implementation in C language

http通信包，提供上传和下载的处理接口(http communications package that provides the processing interface to upload and download)

说明：  14芯和20芯的JTAG的原理图设计说明.(14 core and 20 core schematic design of the JTAG.)

利用DSPF28335实现单相桥式PWM整流器的双闭环PI控制，用到AD7606和数字锁相(Double-closed-loop PI control of single-phase bridge PWM rectifier using DSPF28335, using AD7606 and digital phase lock)

RS232串口通信接收发送数字发送：从单片机P1、P2口输入按键信号， PC机RS232C口接收。 接收：PC机由RS232C口发送数字时，P4口连接的数码管显示。需要发送十六进制数，例如， 十进制数3，应该发送03(RS232 serial communication to send digital receiving )