单片机的同步/异步通信，包括发送部分程序、接收部分程序、主控制程序，针对不同单片机，有着极高的学习意义...

自动交通管理系统 用红、绿、黄三支共两组发光二极管表示交通信号灯，利用单片机模拟有时间显示的定时交通信号灯控制管理。信号灯的变化规律可如下： 1）放行线：绿灯亮放行25秒，黄灯亮警告5秒，然后红灯亮禁止。 2）禁止线：红灯亮禁止30秒，然后绿灯亮放行。 3）当某一方向的红灯亮时，若该方向有车通过，则用扬声器声报警。（撞红灯信号可用3-5V模拟量表示） 同时用2位数码管进行30秒钟递减时间显示。-automatic traffic management system using red, green, yellow a total of three light-emitting diodes, said two traffic lights, using SCM time simulation shows the regular traffic signal control. Signal changes in the law to be as follows : 1) Release Line : green clearance 25 seconds, bright yellow warning five seconds, and then the red-ban. 2) prohibit the lines : red-Ban 30 seconds, then green clearance. 3) When the red light in one direction- that if the direction of a car passed, the use of loudspeakers sound alarm. (Red light signals can hit 3- 5V analog said), while using two digital tube for 30 seconds decreasing time displayed.

protel元器件TQFP-44封装。做好的封装，可以直接用于PCB的绘制！-protel components TQFP-44 package. Do a good job of packaging, can be directly used for PCB drawing!

LCD字库生成 ；-LCD font generation

Tea5767的3线控制程序，M8单片机，采用3线控制，内有电路原理图，可手动指定频率，也可以上下搜索-TEA5767 the 3-wire control procedures, M8 MCU, using 3-wire control with a circuit schematic can be manually specified frequency, can also be upper and lower search

该文档包含了keilc常用的子程序，共有２５个运算类代码，非常实用．-This document contains commonly used keilc subprogram, a total of 25 computing category code, very useful.

多路数据采集 +lcd +菜单功能显示 max485通信-Multi-channel Data Acquisition+ Lcd+ Menu features show MAX485 communication

DDS芯片ad9854的单片机（C8051F020)控制及其外围原理图和PCB图-DDS chip AD9854 microcontroller (C8051F020) and its peripheral control schematic and PCB diagram

这是本人做的一个仿真软件的例子，keil c51语言写的，编译调试环境为keil7+proteus67sp3-This is the one I do simulation software examples keil c51 language was written. Debugging Environment compiler for keil7 proteus67sp3

单片机开发-Single-chip development

atmel at89c51snd1 做mp3的源代码-ATMEL at89c51snd1 do mp3 source code