【正文】 , traffic congestion has bee an international problem. Therefore, multifunction traffic light control system design of reliable, safe, convenient and of great practical necessity. According to the characteristics of traffic lights in the actual control, bined with the control function of single chip, this paper presents a simple method for automatic control of traffic lights with single chip microputer. In the design of hardware circuit design and program design includes two steps, on several important singlechip learning have to get involved in. The system centric devices to design the traffic light controller AT89C51, realizes the cycle traffic lights lit, countdown 5 seconds left when the yellow light flashing warning (traffic light signal output, display time through the output port P0 to two digital tube through the P1 port)。本系統(tǒng)采用AT89C51 單片機(jī)為中心器件來設(shè)計交通燈控制器，實現(xiàn)了紅綠燈循環(huán)點亮，倒計時剩 5 秒時黃燈閃爍警示（交通燈信號通過 P1口輸出，顯示時間通過 P0口輸出至雙位數(shù)碼管）；以及實現(xiàn) 3種工作模式：正常情況、繁忙情況、特殊情況及報警功能。根據(jù)交通燈在實際控制中的特點，結(jié)合單片機(jī)的控制功能，提出了一種用單片機(jī)自動控制交通燈的簡易方法。附件 1： 學(xué) 號： 0121018700XXX 課 程 設(shè) 計 題 目 交通燈控制系統(tǒng)模擬設(shè)計 學(xué) 院 物流工程 專 業(yè) 物流工程 班 級 物流工程卓越 1001 姓 名 XXX 指導(dǎo)教師 朱宏輝 2020 年 6 月 28 日 交通燈控制系統(tǒng)模擬設(shè)計 交通燈控制系統(tǒng)模擬設(shè)計 XXX 武漢理工大學(xué) 物流工程卓越 1001 摘要： 隨著經(jīng)濟(jì)發(fā)展，汽車數(shù)量急劇增加，城市道路日漸擁擠，交通擁塞已成為一個國際性的問題。因此，設(shè)計可靠、安全、便捷的多功能交通燈控 制系統(tǒng)有極大的現(xiàn)實必要性。設(shè)計中包括硬件電路的設(shè)計和程序設(shè)計兩大步驟，對單片機(jī)學(xué)習(xí)中的幾個重要內(nèi)容都有涉足。本系統(tǒng)實用性強、操作簡單、擴(kuò)展功能強。 3 work modes: normal, busy and implementation situation, special circumstances and alarm function. The system practical, simple operation, strong function expansion. Key words: raffic lights, AT89C51, LED, three work modes 交通燈控制系統(tǒng)模擬設(shè)計 目錄 課程設(shè)計任務(wù)書 .............................................................................................................................1 第 1章 前 言 ..............................................................................................................................2 交通燈發(fā)展概述 ................................................................................................................2 課題背景及意義 ...............................................................................................................2 課題任務(wù)及主要實現(xiàn)內(nèi)容 ..................................................................................................3 原理分析 ..........................................................................................................................4 交通燈顯示時序的理論分析 .....................................................................................4 交通燈顯示的理論分析 ..........................................................................................5 第 2章 設(shè)計方案分析 ....................................................................................................................6 單片機(jī)與外圍接口部件 .....................................................................................................6 倒計時顯示界面 ..............................................................................................................6 交通燈 ............................................................................................................................6 第 3章 硬件系統(tǒng)設(shè)計 ....................................................................................................................8 單片機(jī)的選擇 .................................................................................................................8 AT89C51 單片機(jī)簡介 ...............................................................................................8 AT89C51 單片機(jī)的主要特性 .....................................................................................8 主要引腳功能 ..........................................................................................................9 C51 的中斷源 ...................................................................................................... 11 硬件電路實現(xiàn) ................................................................................................................. 11 最小系統(tǒng)設(shè)計 ....................................................................................................... 11 顯示設(shè)計 .............................................................................................................. 13 發(fā)光二極管模擬紅綠燈 ........................................................................................ 16 按鍵模塊 ............................................................................................................. 16 第 4章 軟件電路設(shè)計 .................................................................................................................. 17 軟件編譯環(huán)境測試 ........................................................................................................ 17 C 語言介紹 ............................................................................................................ 17 Keil uVision4 介紹 .................................................................................................. 17 軟件總體設(shè)計 .................................................................................................................. 17 結(jié)論 ............................................................................................................................................ 20 參考文獻(xiàn) ...