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毕业设计论文基于FPGA的交通控制系统的设计
37页1、摘 要通过分析现有的几种交通控制模式,讨论几种常用的交通控制系统技术,介绍了利用EDA技术基于FPGA芯片设计制作的交通控制系统,其优势是运行速度快、应用灵活及低功耗等。只需要修改FPGA芯片的程序即可修改整个系统的功能,最大限度的简化外围电路。本设计有几个独立模块,他们相互辅助工作。FPGA主控芯片控制程序运行,其中计数器进行减计时,主支干道控制器来控制主支干道减计数器的选择和信号灯的控制,数码管扫描控制部分控制每个数码管十位数及个位数计数的分配,七段显示译码器控制数码管显示相应数字;信号源提供系统所需扫描信号和秒脉冲; 74LS138译码器用来选通相应数码管进行工作,使主支干道互不影响,同一时间只有一组数码管工作;硬件外围电路进行显示,是整个系统功能的直接表现。关键词:交通控制、EDA、硬件描述语言、计数器、振荡器ABSTRACTBy analyzing several modes of traffic control,discussing several common traffic control system technology, introduces the use of
2、 EDA technology which is based on FPGA chip design for the traffic control system.Its advantages is the operational speed, application flexibility and low power consumption . It Only need to modify the FPGA chip program when need to modify the functions of the entire system ,which maximizes the simplified external circuit.This design has several independent modules, each of which supports their work. Master control program FPGA chip runs the whole system,and the counter is to reduce the time. Th
3、e main and branch trunk controller is to control the main roads by supporting the choice of the counter and signal control, the digital scan control part is to control every bits of each digital distribution. The seven-segment display decoder corresponding digital control digital display; THE signal source is to provide the necessary signal; The 74LS138 decoder is used to strobe the corresponding digital control work, affect each main branch roads and digital control work at the same time ;The h
4、ardware peripheral circuits is a direct function of the whole system performance.Keywords: traffic control, EDA, hardware description language, counters, oscillators目 录前 言VI第一章 交通灯控制技术的现状与发展11.1交通灯控制技术的发展过程11.2我国信号灯产品发展及标准情况11.3我国交通灯控制发展趋势21.4目前我国信号机产品存在主要问题21.5.软硬件结合原理31.6软硬件结合优势3第二章 交通灯控制系统设计32.1系统设计的性能指标和系统框图32.1.1性能指标32.1.2系统框图及工作原理32.2硬件设计52.2.1 设计框图52.2.2设计过程52.2.3信号源制作原理图52.2.4电路板制作电路图62.2.5数码管扫描控制电路72.2.6数码管显示部分72.2.7交通灯部分72.2.8信号源部分72.3软件系统设计8第三章 单元电路的设计93.1主支干道5进制减计数器电路93.2主支干道20进制减计数器
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