头件的中的#ifndef，这是一个很关键的东西。比如你有两个C文件，这两个C文件都include了同一个头文件。而编译时，这两个C文件要一同编译成一个可运行文件...

什么都有,是大杂烩来的.电子专业不错的资料.电子电路 电路图 电子资料下载 单片机学习 电子制作 电子技术应用-What has, is to stew. Electronic professional good information. Electronic circuit schematics download electronic data to study the electronic production of electronic single-chip technology

基于MCS-51的温度测量程序 温度程序-MCS-51 based on the temperature measurement procedure

本人从网上收集的关于Keil-C51的相关教程,对初学者很有帮助-I gathered from the Internet on the Keil-C51 related tutorials, very helpful for beginners

这是一个AVR单片机的头文件，有关引脚的位选，可BOOL输出输入，非常好用。我一直在用着。主要针对芯片ATMEGA128的头文件，其它的芯片也可向下兼容。-This is an AVR MCU header files, the pin-bit elections BOOL input-output, very easy to use. I have been using. ATmega128 chip aimed at the header files, other chips can also be backward compatible.

利用单片机设计一个显示温度的系统，主要采用的是静态显示的方式-The use of microcontroller design a show that the temperature of the system, mainly in a static display mode

监控矩阵系统视频字符叠加,128路视频输入/32路视频输出.-Surveillance video characters superimposed matrix system, 128 video input/video output 32.

STC单片机大量电路实例，有电源电路，通信电路，含原理图-STC Singlechip a large number of circuit examples, have the power circuits, communication circuits, including schematic diagram

PC机和智能型仪表通过RS485进行异步通信-PC and intelligent instrument for asynchronous communication through the RS485

这是我自己写的18B20驱动程序，不需修改，做的温度计精度很高。大家在做温度采集明无需修改，只需添加上既可使用。-This is what I wrote it myself, 18B20 driver without modification to do high precision thermometer. We do no need to modify the temperature acquisition out, simply add the can use.

芯片at89s52，在上面完成一些如led 点阵 PS键盘 串口 等基本操作 对于初学51的有参考价值-Chip at89s52, in the above example, the completion of some led dot matrix keyboard PS serial basic operation such as 51 for the beginner has reference value