单片机交通灯系统设计报告资料.doc

课程设计说明书 课程设计名称： 专业课程设计 课程设计题目： 交通灯模拟控制系统 学 院 名 称： 信息工程学院 专业： 电子信息工程 班级： 学号： 姓名： 评分： 教师： 20 13 年 7 月 2 日 由每位学生填写、由任教教师保存待查 摘 要 本论文是以十字路口交通灯的控制系统为研究对象，以交通控制基本理论为基础，运用单片机技术原理和应用，对智能交通的控制系统进行分析研究并做出模拟应用。文章论述了基于STC89C51单片机的交通灯控制系统，以STC89C51作为系统的控制元件，扩展一片8255芯片，8255的PA口作为基本输出，点亮发光二极管，即控制红黄绿等的亮灭。电路主要包括：单片机主控模块、8255扩展模块、红绿灯显示模块、紧急放行按键模块。本系统简单模拟现有的交通灯系统，实现十字路口南北方向和东西方向交替亮绿灯即放行，且有黄灯闪烁3秒提醒放行方向即将改变，红灯时间维持13秒，绿灯维持10秒。另外，系统还设计了紧急放行按键，可强行对相应的方向放行。本系统实用性强、操作简单、扩展功能强。 关键词：单片机、8255、交通灯 目 录 摘要·························································2 设计要求··············································4 1.1 设计要求···············································4 1.2 设计思路···············································4 系统组成及工作原理····································5 2.1 系统组成···············································5 2.1.1 单片机STC89C51介绍·································5 2.1.2 8255芯片介绍·······································7 2.1.3 发光二极管·········································9 2.1.4 紧急放行按键·······································9 2.2 交通灯系统工作原理·····································9 硬件电路方案设计·····································10 3.1 设计方案··············································10 3.2 单元电路设计··········································10 3.2.1 时钟电路模块······································10 3.2.2 单片机控制模块及紧急按键模块······················10 3.2.3 8255扩展模块······································12 3.2.4 LED红绿灯显示·····································13 软件设计·············································14 4.1 单片机和8255资源使用情况······························14 4.2 软件各模块介绍········································14 调试与结果···········································16 5.1 软件调试··············································16 5.2 硬件调试··············································18 结论·················································19 参考文献··