精品-毕业设计(论文)-基于单片机的人行过马路智能交通灯系统.doc

摘要 纵观单片机的发展和应用， 51 单片机越来越无法满足用户的需求， ARM 高速32位单片机的出现，缔造了嵌入式系统的新纪元.　　嵌入式系统是指以应用为中心，以计算机技术为基础，软件，硬件可裁减，适应应用系统对功能、可靠性、成本、体积、和功耗严格要求的专用计算机系统。嵌入式系统已广泛地渗透到科学研究、工程设计、军事等各种领域、甚至商业、文化、艺术、及人们日常生活的方方面面。随着国内外各种嵌入式产品的进一步开发和推广，嵌入式技术的重要性日益凸显，使得我们不得不将注意力转移到它身上。ARM的应用已遍及工业控制、消费类电子产品、通信系统、网络系统、无线系统等各类产品市场。此设计采用了ARM7 微处理器LPC2103作为核心处理器。本文介绍了一个智能交通灯系统的设计。该智能交通灯控制系统可以实现的功能有：对某的交通路口进行；各路口有固定的工作周期。LPC2103来实现对红绿灯的控制。其中通过设置LPC2103的GPIO功能用定时器来实现LED灯的亮灭与闪亮。 关键词： ARM7 LPC2103 LED灯  Abstract Throughout the development and application of SCM, 51 SCM increasingly unable to satisfy the demand of users, ARM speed 32bit MCU embedded systems, creates the new era of embedded system. Refer to the application for the center to computer technology as the foundation, software, hardware, can adapt to function, application system reliability, cost, volume, and the power of the strict specialized computer system. The embedded system has been widely permeates scientific research and engineering design, military and other fields, or even commercial, culture, art, and all aspects of Peoples Daily life. With the further development of embedded products, and the importance of the embedded technology allows us to increasingly prominent, divert attention to it. The ARM of the application in industrial control, consumer electronics, communication system, network system, wireless systems and other kinds of product market. This design uses the LPC2103 ARM7 microprocessor core processors . This article describes an intelligent traffic light system. The intelligent traffic light control system functions can be achieved: the road trip against a person to control the traffic junctions and traffic lights to flash control; the intersection with a fixed duty cycle. Pedestrian crossing traffic light control system can not only ease traffic congestion, but also prevent a number of traffic accidents. It uses LPC2103 to realize the control of traffic lights. LPC2103s GPIO by setting them with a timer function to achi