摘要随着经济的发展，人们生活水平的提高，汽车的数量激增，交通拥堵成了日益显著的社会问题，交通控制系统使城市交通变得安全、有序的运行。对交通的疏导起着决定性作用，因此交通灯的合理设计显得尤为重要。此外，为了更好地解决拥堵问题，更加有效的利用道路资源，对交通灯的设计也提出了新的要求。75810

本设计使用STC公司的AT89C51单片机作为控制核心，综合应用微机原理，单片机原理及接口技术等方面的知识，设计出符合要求的的系统，同时结合单片机仿真系统，通过软硬件结合不断调试，使系统能够正常的运行。

该系统模拟现实中十字路口的通行指示，倒计时和紧急车辆强行通过等功能。结合七段共阴极数码管显示时间的模块，交通灯显示模块，晶振电路，复位电路以及按键电路等模块组成。通过软件仿真与硬件调试，实现红、黄、绿灯燃亮时间以及双位数码管显示倒计时，三种颜色灯交替点亮以及紧急情况下的中断处理功能。本系统性价比高，实用性强，操作简单，功能全面，有广泛的应用前景

该论文有图17幅，表4个，参考文献20篇。

毕业论文关键词: 单片机  交通灯 AT89C51 

Traffic Light Control System Based On Single Chip       Microcomputer

Abstract  With the development of economy, the improvement of people's living standard, the number of vehicles, traffic congestion has become increasingly prominent social problem, traffic control system, makes the urban traffic safety and orderly operation。 Plays an decisive role in the traffic guidance, so it is particularly important to the reasonable design of traffic lights。 In addition, in order to better solve the problem of congestion, more efficient use of road resources, also puts forward new requirements for the design of traffic lights。

    Hold this design using STC company AT89C51 as the control core, the integrated application of microcomputer principle, single-chip microcomputer principle and interface technology knowledge, design systems that meet the requirements, combined with single chip microcomputer simulation system at the same time, combining software and hardware debugging unceasingly, make the system to normal operation。

    The system simulation of real traffic intersection in the instructions, the countdown and emergency vehicle force through etc。 Function。 Combined with common cathode seven segment digital tube display time module, traffic lights display module, crystals circuit, reset circuit and key circuit modules。 Through software simulation and hardware debugging, red, yellow, green light burning time and on-off digital tube display the countdown, 3 kinds of color lamp lit alternately and interrupt processing function of the case of an emergency。 This system is cost-effective, strong practicability, simple operation, comprehensive functions, have broad application prospects

The paper has a figure 17, table 4, 20references。

 Key Words: single chip microcomputer  traffic light  AT89C51 

目录

摘  要 I

Abstract II

1 绪论 1

1。1课题研究背景及意义 1

1。2国内外研究现状 2

1。3本论文的主要工作 2

2 总体方案的选定 4

2。1总体通行方案的设计 4

2。2总体设计思路 5

3 硬件设计