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PI数据库标签查询、快照查询、历史数据查询 时间格式转换(pi demo)

文件为上位机开发实例，用C#进行编程实现。(The file is an example of the development of the host computer, and is implemented by programming in C#.)

说明：  LInux下SJA1000 CAN设备驱动(LInux SJA1000 CAN Device Driver)

基于TI例程，自己编写的交流异步电机矢量控制源代码——adc模块(Based on the TI routines, their AC asynchronous motor vector control program source code-- ADC module)

通过Prodave 6.0对西门子S7-300控制器（以太网）的I,Q,PI,PQ，M,DB，C,T等寄存器进行读写操作(Through Prodave 6.0 control Siemens S7-300 s (Ethernet) I, Q, PI, PQ, M, DB, C, T registers, read and write operations)

C++程序设计（谭浩强） C++程序设计（谭浩强）(C++ program C++ program)

说明：  实现了快速排序、随机排序以及中位排序查找第k小元素(Fast sorting, random sorting and median sorting are realized to find the k-th small element)

基于Winsock的网络编程小程序，可以实现FTP的上传和下载。(Winsock-based network programming applets, can be achieved FTP upload and download.)

//有机会下载安装了mapwingis，试图利用MFC对其二次开发利用，可惜网上能够查到的资料多为C#，VC资料太少。 //经过几天的研究，参考了网上网友的资料，利用VC实现了mapwingis部分功能的开发，为了和我有相同需求的码农们着想， //少走弯路，特开发部分示例代码，以抛砖引玉。 // 禾呈 && 博士 2019-5-30(After several days of research, referring to the information of netizens on the internet, the development of some functions of mapwingis has been realized by VC, for the sake of farmers who have the same needs as me.)

界面漂亮的VC++计时器源码 界面漂亮的VC++计时器源码，发愁界面设计的VC++初学者可以参考一下本例中的界面处理方法。点击开始计时，数字会按时间慢慢变校(VC++ interface pretty nice interface, the timer source VC++ timer source code, to worry about interface design of the VC++ Beginners can refer to this case, the interface approach. Click to start running, the figure will gradually change over time the school)