基于单片机AT89C52控制的交通灯　.doc

PAGE 　　　 　 电子信息工程系毕业论文　 　　 　 　　　 　　 江阴职业技术学院　 毕业论文　　　 课题： 基于单片机AT89C52控制的交通灯设计与仿真 　 　 　　 　　 　 专 业 　 学生姓名 　　 班 级 　　 学 号 　 指导教师 　 完成日期 　　　 - PAGE I -　　　 摘 要　　 十字路口车辆穿梭，行人熙攘，车行车道，人行人道，有条不紊。那么靠什么来实现这井然秩序呢？靠的是交通信号灯的自动指挥系统。交通信号灯控制方式很多。本设计主要分为五大模块输入控制电路、时钟控制电路、片内外程序切换控制、显示电路。以MSC-51系列单片机IntelAT89C52为中心器件来设计交通灯控制器，实现了AT89C52芯片的P1口设置红、绿灯、黄灯燃亮时间的功能；为了系统稳定可靠采用了74LS14施密特触发器芯片的消抖电路，避免了系统因输入信号抖动产生误操作；显示时间直接通过AT89C52的P3口输出，由NPN驱动LED数码管显示红灯燃亮时间。　 　　 　　 　　 　 　　　 Abstract　 The intersections vehicle wears shuttle, pedestrian Xi Rang, garage driveway, persons sidewalk, orderly. So depend what to carry out this well arranged order? What to depend is a traffic sign light of automatic conductor system. The control method of the traffic sign light is a lot of. This design is mainly divided into five greatest molds a piece the electric circuit, clock of the importation control a control outside procedure inside the electric circuit, slice to cut over a control and shows electric circuit. Take single slice the machine IntelAT89 C52of the serieses MSC-51s as a center spare part to design transportation light controller, carried out the AT89 C52s Ps 1 peoples constitution of the chips red, the function in bright time of green light, Huang2 Deng Ran2;For the sake of system stability the credibility adopted a 74 LS14 airtight trigger eliminate of machine chip to tremble electric circuit especially, avoided system because of importation the signal tremble movable property to living a mistake operation; The P 3 people who shows that time directly passes the AT89 C52 output, is driven LED figures a tube by the NPN to show red-light Ran bright time.　 　 　 目 录 TOC \o 1-3 \h \z \u 　　　 HYPERLINK \l _Toc312180882 摘 要 PAGEREF _Toc312180882 \h I　　 HYPERLINK \l _Toc312180883 Abstract PAGEREF _Toc312180883 \h I　 HYPERLINK \l _Toc312180884 目 录 PAGEREF _Toc312180884 \h II　　　 HYPERLINK \l _Toc31218088