基于单片机的十字路口交通灯设计--大学毕业设计（论文）.doc

摘 要 近年来随着科技的飞速发展，单片机的应用正在不断深入，同时带动传统控制检测。在实时检测和自动控制的单片机应用系统中，单片机往往作为一个核心部件来使用，仅单片机方面知识是不够的，还应根据具体硬件结构软件结合，加以完善。 十字路口车辆，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。 关键词：单片机；交通灯 Abstract In recent years, with the rapid development of science and technology, the application of SCM is going deep, driving the traditional detection techniques to renew day by day. In the real-time examination and in the automatic control monolithic integrated circuit application system, the monolithic integrated circuit often took a core part uses. The monolithic integrated circuit aspect knowledge is only insufficient, but should also act according to the concrete hardware architecture software and hardware union, to be improved. The intersection vehicles shuttle, the pedestrian is bustling, car dealership traffic lane, person sidewalk, methodical. Then depending on what to realizes this orderly order? the traffic lights on the automatic control system. There are great number kinds of modes to control the traffic lights. The system uses a series of MCS-51 as the center AT89C51 single-chip device designed to control the traffic lights, so as to realize the function of setting red, green light time by 8051 chip’s P3 port according to the actual traffic flows, lighting the red-light and green-light by turn and lighting the yellow-light to warm while 5 seconds left(outputting the traffic light signal by P1,outpuing the time by P0 and showing the time on double-digits nixie tube). Short of the design cycle, high reliability, practical, simple operation, easy maintenance, the expansion of powerful is this system. Key words: SCM; MCU; traffic light 目 录 中 英 文 摘 要 2 1　设计要求 4 ２　设计目的 4 3　方案比较、设计与论证 4 4　原理分析 5 4.1 交通灯显示时序的理论分析 5 4.2 交通灯显示的理论分析 7 5　程序设计流程图 7 6　总体设计与电路图 9 6.1　芯片选择 9 6.2　设计电路图 10 6.3　PROTEUS仿真图： 11 6.4　交通灯程序 12 7 仿真测试、数据及结果分析 18 8 总结与展望 18 致谢 20 参考文献： 21 附 录 22 1　设计要求 1.1　程序开始运行先南北段通行、东西段禁止60s，后东西段通行、南北段禁止60s，依此循环。 1.2　系统分三种工作模式：正常模式、繁忙模式、特殊模式，并且通过三个按钮“正常”、“繁忙”、“特