基于51单片机实现的交通灯毕业论文.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。本系统采用MSC-51系列单片机为中心器件来设计交通灯控制器，实现了设置红、绿灯燃亮时间的功能实用性强操作简单。 With the rapid development of science and technology in recent years, SCM applications are deepening at the same time promote more traditional control detection update. SCM applications in automatic control systems, SCM is often used as a core component, only the MCU is not enough knowledge, but also hardware and software based on specific hardware combination to be improved. Crossroads shuttle vehicles, pedestrians bustling, car dealers Drive, people walkways, orderly. Then rely on to achieve the discipline of the order then? Rely on the automatic traffic light is the chain of command. Many ways to control traffic lights. In this system, MSC-51 Series MCU devices designed STC89C52 center traffic light controller, use light-emitting diode and digital control to achieve a set of red, green kindle function of time, traffic light cycle light, countdown 5 seconds left when the yellow light flashes warning, use of keys makes the system has countdown time setting, emergency treatment, according to manual control and other functions specific circumstances. The system practical, simple, powerful extensions. Key words：STC89C52，LED，Digital tube，key-press 目录 第一章 绪 论 - 1 - 1.1引言 - 1 - 1.2 概述 - 2 - 第二章 芯片简介 - 3 - 2.1 MSC-51芯片简介 - 3 - 2.1.1 MCS-51单片机内部结构 - 3 - 2.1.2 中央处理器 - 3 - 2.1.3 数据存储器(RAM) - 3 - 2.1.4 程序存储器(ROM) - 4 - 2.1.5 定时/计数器(ROM) - 4 - 2.1.6 并行输入输出(I/O)口 - 4 - 2.1.7 全双工串行口 - 4 - 2.1.8 中断系统 - 4 - 2.1.9 时钟电路 - 4 - 2.2 MCS-51的引脚说明 - 5 - 第三章 交通灯系统方案论证与硬件设计 - 7 - 3.1设计目的和要求 - 7 - 3.1.1 交通灯工作状态分析 - 7 - 3.2 方案比较与论证 - 8 - 3.2．1硬件系统设计具备的原则 - 8 - 3.2.2 程序选择方案 - 8 - 3.2.3 显示界面方案 - 8 - 3．2.4 输入方案 - 9 - 3.3 硬件电路设计 - 9 - 3.3.1交通灯控制系统的硬件要求 - 9 - 3.3.2硬件结构框图 - 9 - 3.3.3交通灯流程图 - 10 - 3.3.4 交通灯控制系统的原理框图 - 10 - 3.3.5 电路原理框图的解释与说明 - 11 - 3.3.6 基于交通灯电路原理图