单片机控制交通灯大学毕业设计论文

单片机控制交通灯

目 录 录

摘 要.......................................................................................................................................13 abstract .........................................................................................................................................13 引 言..........................................................................................................................................9

第一章 单片机的概述...........................................................................................................22

1.1 单片机的概述.................................................................................................................1

1.2 芯片简介..........................................................................................................................1

1.2.1 MSC-51芯片简介....................................................................................................4

1.2.2 8255芯片简介........................................................................................................5

1.2.3 74LS373简介..........................................................................................................6

第二章 系统硬件设计.............................................................................................................8

2.1 交通管理的方案论证...................................................................................................9

2.2 单片机系统硬件设计.................................................................................................13

2.2.1 单片机交通灯系统总框图................................................................................18

2.2.2 单片机交通灯硬件线路图................................................................................22

2.2.3 单片机交通灯系统工过程分析.........................................................................9

第三章 控制器的软件设计....................................................................................................13

3.1 1秒内各时间段的分析设定....................................................................................18

3.2 计数器硬件延时..........................................................................................................22

3.2.1 计数器初值计算.....................................................................................................9

3.2.2 计算公式................................................................................................................13

3.2.3 1秒时间分析法....................................................................................................18

3.2.4 单位时间法的相应程序代码............................................................................22

3.3 单片机交通灯的软件延时..........................................................................................9