【正文】 .................................................................................................. I ABSTRACT ..................................................................................................................... II 1 緒 論 ........................................................................................................................ 1 基于 AT89S52 單片機(jī)的搶答器的介紹 ......................................................... 1 國內(nèi)外發(fā) 展?fàn)顩r .............................................................................................. 1 本設(shè)計所要實現(xiàn)的目標(biāo) .................................................................................. 1 課題設(shè)計的意義 .............................................................................................. 2 2 主要器件介紹 ............................................................................................................ 3 主控芯片 (微處理器 )的選擇 ............................................................................ 3 AT89S52 單片機(jī)性能簡介 .................................................................... 3 AT89S52 單片機(jī)引腳功能說明 ............................................................ 4 顯示器的選擇 .................................................................................................. 7 七段數(shù)碼管性能簡介 ............................................................................ 7 七段數(shù)碼管驅(qū)動方式 ............................................................................ 8 七段數(shù)碼管引腳功能說明 .................................................................... 8 顯示器的驅(qū)動芯片的選擇 ............................................................................ 10 3 系統(tǒng)硬件構(gòu)成 ...........................................................................................................11 設(shè)計原理 .........................................................................................................11 外圍電路 ........................................................................................................ 12 電源電路 .............................................................................................. 12 晶振電路 .............................................................................................. 13 復(fù)位電路 .............................................................................................. 13 蜂鳴器電路及驅(qū)動電路 ...................................................................... 15 數(shù)碼管顯示電路及相應(yīng)的驅(qū)動電路 .................................................. 16 選手按鍵電路 ...................................................................................... 17 4 系統(tǒng)軟件設(shè)計 .......................................................................................................... 19 5 軟件調(diào)試及仿真 ...................................................................................................... 21 軟件編譯 ........................................................................................................ 21 工程的創(chuàng)建 .......................................................................................... 21 AT89S52 單片機(jī)的選擇 ...................................................................... 21 程序的編譯 .......................................................................................... 22 xx 大學(xué) 本科畢業(yè)設(shè)計（論文） Ⅳ 系統(tǒng)仿真測試 ................................................................................................ 25 6 結(jié) 論 ...................................................................................................................... 31 參考文獻(xiàn) ........................................................................................................................ 33 致 謝 ............................................................................................................................ 35 附錄 A ............................................................................................................................ 37 附錄 B............................................................................................................................. 39 xx 大學(xué) 本科畢業(yè)設(shè)計（論文） Ⅴ xx 大學(xué) 本科畢業(yè)設(shè)計（論文） 1 1 緒 論 基于 AT89S52 單片機(jī)的搶答器的介紹 搶答器是政府機(jī)關(guān)、金融單位、廣播電視系統(tǒng)或黨委、工會、團(tuán)委、企事業(yè)單位等部門舉辦競賽問答、各種知識測試、娛樂活動中一種常用的必備理想的設(shè)備。 關(guān)鍵詞： AT89S52；搶答器； LED；匯編語言 xx 大學(xué) 本科畢業(yè)設(shè)計（論文） Ⅱ The Design of Responder Rased on AT89S52 Microcontroller ABSTRACT Responder based on AT89S52 singlechip microputer is a product of simple circuit,low cost,convenient operation,reliability and sensitivity. This paper based on the singlechip microputer as the core technology developes a set of way of software bined with hardware to finish the responder design the aspect of hardware,microcontroller control chip selects the United States of America Atmel corporation’s AT89S52 design also uses the LED digital tube display, power supply circuit, c