【正文】 nd not easy to realize, and the stability is not very high. This design uses 51 microcontroller as the core ponent, and the buzzer and the digital tube and other ponents eight responder, the use of singlechip clock circuit, reset circuit, key circuit design, can show the player answer number and answer time features. Here we use AT59C51 as the microcontroller design, stable performance, simple manufacture. Key words: responder, AT89C51, digital tube 目錄 摘要 .................................................................................................. I Abstract ........................................................................................... II 目錄 ................................................................................................. 1 1 緒論 ............................................................................................. 1 設(shè)計(jì)背景 及意義 ...................................................................................... 1 本設(shè)計(jì)的主要內(nèi)容 .................................................................................. 1 2 系統(tǒng)總體概述 ............................................................................. 2 系統(tǒng)主要功能 .......................................................................................... 2 方案論證 ............................................................................................... 3 方案比較 與選擇 ..................................................................................... 4 3 硬件設(shè)計(jì) ...................................................................................... 4 搶答器的工作原理 .................................................................................. 4 主控芯片的介紹 — AT89C51 ................................................................... 5 單片機(jī)內(nèi)部結(jié)構(gòu) ........................................................................... 5 單片機(jī)的引腳定義 ....................................................................... 6 功能電路的介紹 ...................................................................................... 7 時(shí)鐘頻率電路的設(shè)計(jì) ................................................................... 7 復(fù)位電路的設(shè)計(jì) ........................................................................... 7 顯示電路的設(shè)計(jì) ........................................................................... 8 鍵盤掃描電路的設(shè)計(jì) ................................................................... 8 報(bào)警電路的設(shè)計(jì) ........................................................................... 9 4 軟件設(shè)計(jì) ................................................................................... 10 主程序流程圖 ........................................................................................ 10 搶答流程圖 ............................................................................................ 11 子程序設(shè)計(jì) ............................................................................................ 12 定時(shí)中斷 子程序 ......................................................................... 12 外部中斷 子程序 ........................................................................ 13 報(bào)警 子程序 ................................................................................ 14 控制 子程序 ................................................................................ 15 5 調(diào)試 ............................................................................................ 16 硬件調(diào)試 ................................................................................................ 16 軟件調(diào)試 ................................................................................................ 17 調(diào)試結(jié)果及分析 .................................................................................... 17 總結(jié) ............................................................................................... 19 致謝 ............................................................................................... 20 參考文獻(xiàn) ....................................................................................... 21 附錄： ........................................................................................... 22 1 1 緒論 設(shè)計(jì)背景 及意義 如今 搶答器是 作為一種 很 普遍 的電子產(chǎn)品，在 很多比賽類場(chǎng) 合中，它能比較快速且客觀公正地辨別出最先獲得發(fā)言的參賽者和選手。在51 系列單片機(jī)中 采用 比較常用的 AT59C51 作為本設(shè)計(jì)的單片機(jī)，性能穩(wěn)定，制作簡(jiǎn)易。 學(xué)號(hào) 147308226 蘇州市職業(yè)大學(xué) 畢業(yè)設(shè)計(jì) 題目 基于 AT89C51 單片機(jī)的八 路 搶答 器的設(shè)計(jì)與實(shí)現(xiàn) 學(xué)生姓名：