【正文】 （系）教研室主任 2020 年 6 月 20 日 年 月 日 說明：畢業(yè)論文（設(shè)計(jì)）任務(wù)書由指導(dǎo)老師根據(jù)課題的具體情況填寫，經(jīng)系部審查，系主任簽字后生效。 近年來，隨著科技的飛速發(fā)展，電子器件也隨之廣泛應(yīng)用，其中單片機(jī)也不斷深入人民的生活當(dāng)中。 從一定程度上解決了交通路口堵塞、車輛停車等待時(shí)間不合理、急車強(qiáng)通等問題。 本模擬系統(tǒng)由單片機(jī)硬 /軟件系統(tǒng)，兩位 7 段數(shù)碼管和 LED 燈顯示系統(tǒng)。 關(guān)鍵字 ： 單片機(jī) 紅綠燈 AT89C51 Proteus 仿真 安徽工商職業(yè)學(xué)院 2020 屆畢業(yè)設(shè)計(jì) Abstract Since 1858 the British invented the original the mechanical wrench traffic lights after the next hundred years, the traffic lights changed traffic conditions, also occupies an important position in people39。s social activities, economic development, the number of cars increased dramatically, increasingly crowded urban roads, traffic lights more shows its function the traffic effectively control, have a significant effect on traffic control to improve the capacity of road conduction and reduce traffic accidents. In recent years, with the rapid development of science and technology, electronic devices widely used, which the microcontroller also continue deep into the lives of the people. The simulation traffic lights system AT89C51 microcontroller as the core ponent of the intelligent control of the signal lights on the road conditions. From a certain extent, to solve the problem of traffic intersection congestion, vehicle parking unreasonable waiting time, emergency vehicle pass. The system has a simple structure, high reliability, low cost, realtime, to install and easy to maintain, there is a wide range of application prospects. The analog system by the microcontroller hardware / software system, two 7segment digital tube display system and LED lights. And the reset circuit control circuit, etc., to better simulate the control of a traffic Keywords: Microcontroller traffic lights AT89c51 Proteus simulation 安徽工商職業(yè)學(xué)院 2020 屆畢業(yè)設(shè)計(jì) 目 錄 第一章 概要 ......................................................... 1 第一節(jié) 設(shè)計(jì)思路 ................................................................................................... 1 第二節(jié) 單片機(jī)交通控制系統(tǒng) 方案 的 比較、設(shè)計(jì)與論 證 ................................... 1 第二章 設(shè)計(jì)方案 ..................................................... 2 第一節(jié) 設(shè)計(jì)要求 ................................................................................................... 2 第二節(jié) 設(shè)計(jì)方案優(yōu)選 ......................................................................................... 2 第三節(jié) 系統(tǒng)框圖 ................................................................................................... 3 第三章 硬件方面 ..................................................... 4 第一節(jié) 芯片選擇及簡單介紹 ............................................................................... 4 第二節(jié) 晶振電路 ................................................................................................. 6 第三節(jié) 復(fù)位電路 ................................................................................................... 6 第四節(jié) 顯示部分 ................................................................................................... 7 第五節(jié) 信號(hào)燈部分 ............................................................................................... 7 第六節(jié) 單 片機(jī)最小系統(tǒng) ....................................................................................... 8 第四章 軟件方面 .................................................... 9 第一節(jié)流程圖 ......................................................................................................... 9 第二節(jié) 系統(tǒng)仿真電路圖 ..................................................................................... 10 第五章 畢業(yè)設(shè)計(jì)體會(huì) ................................................ 12 謝辭 .......................................................