【正文】 ，電路中晶振并沒有采用 ，而采用的是，這樣做的好處是使串行口波特率為 。而 七 段數(shù)碼管是一種常用的顯示器件，它 僅用七個(gè)豎線就能顯示從零到九 共 10個(gè)數(shù)字，加上一個(gè)小數(shù)點(diǎn)共 8 個(gè) 顯示段，他的每一個(gè)豎線都是發(fā)光二極管，二極管發(fā)光的位置不同，顯示不同的數(shù)字。因此想改善交通問題則需另辟蹊徑。 關(guān)鍵詞：?jiǎn)纹瑱C(jī)； Proteus 7 Professional； LED Abstract Nowadays， Traffic lights can’t country is stronger and sronger,for Instead walk,cars are are rapidly alternative bike appeared mushroomed in the city ,traffic light has a very important significance in paper microcontroller as the core, LED display signals simultaneously applied to the timer to the design and production of traffic lights. According to the actual traffic analysis hardware design, and its software programming. Further simulation with Proteus 7 Professional, and more intuitive to observe the deficiencies of its improvement. 目錄 第一章 緒論 .................................................................................................................... 1 意義 ...................................................................................................................... 1 交通燈研究的發(fā)展概況 ...................................................................................... 1 主要內(nèi)容 .............................................................................................................. 1 第二章 整體設(shè)計(jì)方案 ..................................................................................................... 1 整體分析 ............................................................................................................... 1 功能要求分析 ....................................................................................................... 1 方案比較 .............................................................................................................. 2 方案選定 .............................................................................................................. 2 最終方案 .............................................................................................................. 2 第三章 硬件設(shè)計(jì) ............................................................................................................ 2 整體分析 ............................................................................................................... 2 AT89S52 ...................................................................................................... 2 七段數(shù)碼管 ................................................................................................ 4 發(fā)光二極管 .................................................................................................... 6 單元電路設(shè)計(jì) .................................................................................................... 7 CPU 最小系統(tǒng)電路圖 ...................................................................................... 7 串行口通信模塊 ............................................................................................ 7 顯示模塊 ....................................................................................................... 8 元件清單 ............................................................................................................ 8 第 四章 軟件設(shè)計(jì) ............................................................................................................ 9 設(shè)計(jì)思路 ............................................................................................................ 9 倒計(jì)時(shí)的理論 ................................................................................................. 9 狀態(tài)燈的理論 ................................................................................................. 9 流程設(shè)計(jì) ............................................................................................................ 9 控制流程設(shè)計(jì)圖 ............................................................................................ 9 主程序流程設(shè)計(jì)圖 ...................................................................................... 10 模塊化的程序設(shè)計(jì) .......................................................................................... 11 設(shè)計(jì)的必要性 .............................................................................................. 11 設(shè)計(jì)步驟 ..................................................................................................... 11 第五章 仿真及調(diào)試 ....................................................................................................... 12 調(diào)試步驟 ................................................................................................................ 12 仿真 ....................................................................................................................... 13 聯(lián)調(diào) ....................................................................................................................... 15 總結(jié) ............................................................................................................................... 15 參考文獻(xiàn) ....................................................................................................................... 16 附錄 ............................................................................................................................... 17 第一章 緒論 意義 當(dāng)今社 會(huì) ,隨著我國(guó)的逐漸強(qiáng)大 ,百姓生活質(zhì)量逐年提高 ,私家車可謂如雨后春筍般出現(xiàn)在大街小巷，因此城市交通問題越來越引起大