【正文】 ...................................................1 單片機概述 ..................................................................................................................2 芯片簡介 ......................................................................................................................2 AT89S52 芯片簡介 ...............................................................................................2 中斷系統(tǒng) ...............................................................................................................3 AT89S52 的引腳說明 ...........................................................................................3 8255 芯片簡介 .......................................................................................................4 功能描述 ......................................................................................................................52 方案比較、設(shè)計與論證 ....................................................................................................6 電源提供方案 ..............................................................................................................6 顯示界面方案 ..............................................................................................................6 輸入方案： ..................................................................................................................6 理論分析與計算 ..........................................................................................................7 交通燈顯示時序的理論分析與計算 ...................................................................7 交通燈顯示時間的理論分析與計算 ...................................................................8 交通管理的方案論證 ..................................................................................................93 硬件電路設(shè)計 ..................................................................................................................10 硬件設(shè)計流程圖 ........................................................................................................10 交通燈控制電路設(shè)計 ................................................................................................10 倒計時顯示電路設(shè)計 ................................................................................................12 中斷電路設(shè)計 ............................................................................................................12 語音電路設(shè)計 ............................................................................................................13 智能交通燈系統(tǒng)的總設(shè)計 ........................................................................................19 系統(tǒng)工作原理 ............................................................................................................19 交通燈硬件線路總圖 ................................................................................................204 系統(tǒng)軟件程序設(shè)計 ..........................................................................................................21 主程序流程圖 ............................................................................................................21 通行規(guī)則如下 ............................................................................................................23 每秒鐘的設(shè)定 ............................................................................................................23 計數(shù)器硬件延時 ........................................................................................................23 計數(shù)器初值計算 .................................................................................................23 計算公式 .............................................................................................................23 １秒的方法 .........................................................................................................24 相應(yīng)程序代碼 ......................................................................................................24沈陽航空工業(yè)學(xué)院北方科技學(xué)院畢業(yè)設(shè)計（論文） I 軟件延時 ....................................................................................................................24 時間切換 ....................................................................................................................25 相應(yīng)的程序代碼 ..................................................................................................255 軟硬件聯(lián)合調(diào)試 ..............................................................................................................27 軟硬件調(diào)試 ................................................................................................................27 紅綠交通燈控制程序 .........................................................................................27 交通燈電路的調(diào)試 .............................................................................................27 特殊車輛通行時緊急停止電路的調(diào)試 .............................................................27 交通燈時間切換電路的調(diào)試 .............................................................................28 語音電路調(diào)試 .....................................................................................................28 結(jié)果分析 ..............................................................................................................286 結(jié)論 ..................................................................................................................................30參考文獻 ..............................................................................................................................31致 謝 ..................................................................................................................................32附錄Ⅰ交通燈硬件線路總圖 ..............................................................................................33附錄Ⅱ程序清單 ..................................................................................................................34沈陽航空工業(yè)學(xué)院北方科技學(xué)院畢業(yè)設(shè)計（論文）