some pdf files describing about PLC concepts and components.

WINCC OPC VB开发通信方式 ,读取其中的变量和改变变量内容,根据变量名和分组名,服务器名字-WINCC OPC VB to develop means of communication, read them the contents of variables and changes in variables, grouped under the variable name and the name, server name

此代码用于磅秤的无线数据传输。秤将无线发送数据。该装置将接收无线数据并在七段式显示器上显示。基本上是无线数据终端的称重。

常用的窜口调试器，方便，好用。大家快下啊。-common channeling mouth debugging for the convenience and ease of use. Members Express under ah.

STM32搭载嵌入式实时操作系统μC/OS-II，使用外设RTC,超声波测距模块，摄像头0V7725，彩色触摸屏TFT，实现超级日历功能，超声波测距，摄像头等多种功能。

avr下最小化的printf函数，可以输出八进制与十六进制数值。-avr小printf 私 十

应用背景主要应用于51单片机的SD卡操作，完美适用于STC12c60s2单片机，现在的这方面的资源比较少，适用于51的更少，所以如果有需要这方面的资源，可以参考下，个人觉得很不错，已调通。关键技术51单片机的SD卡操作，完美适用于STC12c60s2单片机，函数有点大，住要是ZNFAT.C文件，里面是文件系统的主要函数，不过有些函数还未有待实验，SD.H文件的4个引脚可以根据自己的单片机自己定义，串口函数波特率为2400；

一个TCPIP应用于MSP430的源程序-a source for MSP430

天嵌的Qt使用手册，挺详细的，刚接触Qt的可以仔细-Days embedded in the Qt manual, very detailed, new to Qt that can take a closer look

EEPROM存储器AT45DB642驱动程序，供大家分享。-EEPROM memory AT45DB642 driver for the share.

应用背景The leading developers of Marlin are currently (January 2015) EvdZ and bkubicek, though many others contribute with their patches. This is a firmware for reprap single-processor electronics setups. It also works on the Ultimaker PCB. It supports printing from SD card+Folders, and look-ahead trajectory planning. This work is licensed under the GNU GPL v3 or (at the user"s discretion) any later version. It is based on Sprinter firmware, which was licensed under GPL v2 or later.关键技术 Features: Interrupt based movement with real linear acceleration. High steprate. Look ahead (Keep the speed high when possible. High cornering speed). Interrupt based temperature protection. preliminary sup