基于cpld的交通灯控制器设计____学士学位论文.doc

本 科 毕 业 设 计 论 文 题 目 基于CPLD的交通灯控制器设计 摘 要 当今时代是一个自动化时代，交通灯控制等很多行业的设备都与计算机密切相关。因此，一个好的交通灯控制系统，将给道路拥挤、违章控制等方面给予技术革新。随着大规模集成电路及计算机技术的迅速发展，以及人工智能在控制技术方面的广泛运用，智能设备有了很大的发展，是现代科技发展的主流方向。本文介绍了一个交通灯系统的设计。 本文介绍的是基于EDA技术设计交通灯系统的一种方案。EDA技术的一个重要特征就是使用硬件描述语言(HDL)来完成系统的设计文件，应用VHDL的数字电路实验降低了数字系统的设计难度,这在电子设计领域已得到设计者的广泛采用。本设计就是针对交通信号灯控制器的设计问题，提出了基于VHDL语言的交通信号灯系统的硬件实现方法。 本设计利用VHDL语言来实现交通灯控制器。通过对系统进行结构分析，采用自顶向下的层次化设计方法，分别给出了用于控制交通灯明灭和倒计时功能的控制模块，用于紧急情况的分频模块，以及控制各个方向数码管的译码显示模块，最终形成用于自动控制十字路口的交通灯和计时器的交通灯控制器。从本文最后给出的仿真结果可知，该交通灯控制器实现了预期目标。 关键词：交通信号灯，VHDL语言，仿真  ABSTRACT The modern age is an era of automation, traffic light control equipment for many industries are closely related with the computer. Therefore, a good traffic light control system, will bring technical innovations for road congestion, illegal control, etc. With the rapid development of large scale integrated circuits and computer technology and the extensive use of intelligent devices in the control of artificial intelligence technology, intelligent devices have gotten great progress and become the mainstream of the development of modern science . This paper describes the system design of traffic lights . Traditional traffic light control system is mostly achieved by a single chip or PLC, this paper introduces a scheme of the design of traffic signal systems based on EDA technology . An important feature of EDA technology is the use of hardware description language (HDL) to complete the system design documents, the experiment applied VHDL digital circuit reduces the difficulty of digital system design, which has been widely adopted by the designers of electronic area. This design puts forward a method of hardware implementation for traffic lights system based on VHDL language to resolve the design problem of traffic signal controller . Each module is given VHDL program by analyzing the structure of the system and using a hierarchical design method, and it applies Max