很完整的门禁系统原码，希望能帮助大家更好的学习学习一下...

51的键盘扫描程序,与原来的扫描方式不同,这种方式可以处理多键同时按下.-51 keyboard scanning procedures, with the original scan different ways, this approach can handle multi-button pressed together.

用ATMEL AVR单片机开发的MMC程式在SPI模式-with ATMEL AVR development programs in the MMC SPI mode

本款强排式热水器采用

keilc程序+proteus+vb+串口调试，非常适合单片机开发的人用-keilc procedures+ proteus+ vb+ serial debugging, very suitable for development with single-chip microcomputer

用msp430 对128×64的LCD的完全操作， -Controller with 128 64 LCD full operation,

MSP430f149的12864显示程序-MSP430F149 the 12864 display program

单串口8051内核单片机模拟双串口程序源代码-8051 single-core single-chip serial analog dual serial source code

周立功试验板上的一个程序-weeks meritorious pilot of a board procedures

P87C591的a/d 转换程序，可在keil 51下调试运行，也可将其参数修改后作为函数使用。-P87C591 the a/d conversion, in the next 51 c51 debugging operation, but also its parameters can be modified as a function use.

PS键盘的使用非常普遍,结合PS键盘很单片机,能借助键盘的按键非常丰富,在单片机拓展汉字输入提供了条件-PS very common use of the keyboard, the keyboard is very single-chip combination of PS can use the keyboard keys are very rich in Chinese character input in single-chip expansion has provided the conditions