交通灯课程设计内容.doc

PAGE PAGE 1 PAGE 1 郑州华信学院 课程设计说明书 题目： 姓 名： 院 （系）： 专业班级： 学 号： 指导教师： 成 绩： 时间： 年 月 日至 年 月 日 目 录 1 前言 ······································2 1.1课程设计目的 ·····································2 1.2任务和要求 ·······································2 2 硬件电路的描述和设计 ·························3 2.1单片机的简述 ······································3 2.2电源电路 ·········································3 2.3芯片的选择与简单介绍 ·····························4 2.4单片机的最小系统 ·································4 2.5 显示电路 ········································5 2.6 信号灯电路 ······································5 2.7电路原理图 ······································6 3 软件设计流程及描述 ··························7 3.1设计方案思想 ·····································7 3.2设计要求流程图 ···································7 3.3主程序流程图 ·····································8 4 仿真效果 ·····································9 4.1仿真软件 ·········································9 4.2系统仿真效果图····································9 4.3仿真结果分析·····································11 5 源程序代码 ·································11 6 参考文献 ···································17 7电路原理图及元器件表 ·······················18 7．1电路原理 ·········································18 7．2元器件表 ·········································18 8心得体会 ···········································20 1序言 1.1课程设计目的 1.巩固和加深课堂所学知识； 2.学习掌握一般的软硬件的设计方法和查阅、运用资料的能力； 3.通过对交通灯实时控制系统的设计与制作，掌握MCS-51单片机的中断系统、定时/计数器及并行I/O口的综合应用和编程方法，掌握七段数码管的显示原理和方法。 1.2任务和要求 设计一个交通灯系统，通过单片机如AT89C51并接数码管及发光二极管来模拟交通灯的变化规律，8个数码管用来显示秒值，东西南北各两个，12个发光二极管，东西南北各三个，分为红绿黄三种颜色。设计思路，首先东西方向绿灯亮，南北方向红灯亮，同时开始计时20s，在7段数码管上显示时间。当20s倒计时结束后，开始3s倒计时，并且东西方向绿灯开始闪烁，南北方向红灯亮。当3s倒计时结束后再开始2s倒计时，并且东西方向黄灯亮，南北方向还是红灯亮。当2s倒计时结束后开始20s的倒计时，此时是南北方向绿灯亮，东西方向红灯亮。接下来就是南北方向绿灯闪烁3s，再南北方向黄灯闪烁2s，接着又开始循环。要求设计出电气原理图、要求设计出程序流程图、要求设计出程序。 2硬件电路的描述和设计 2.