【正文】 越來越高。目前嵌入式單片機(jī)滲透到我們生活的各個領(lǐng)域，由于它具有功能強(qiáng)大，體積小，功耗低，可靠性高，易擴(kuò)展，性價(jià)比高，使用方便等特點(diǎn)，因此它廣泛應(yīng)用于工業(yè)控制，智能儀表等有關(guān)系統(tǒng)設(shè)備。 系統(tǒng)設(shè)計(jì)完成后應(yīng)有成本 低廉、性能穩(wěn)定、高準(zhǔn)確度顯示、操作方便且易攜帶等特點(diǎn)。 關(guān)鍵詞： 籃球 賽 計(jì)分 器 ； AT89C51； 74LS247； 七段數(shù)碼管； 仿真 Abstract Entering the twentyfirst Century, along with the more and more popularization application of the electronics, information and munication technology, people’s requirement is more and more high in the electronic technology, The embedded microcontroller is perating into every aspect of our lives with its strong function, small volume, low power consumption, high liability, easy expansion, high performanceprice ratio, use convenient and so on , so it is widely used in industrial controlment, smart instrumentation and related system equipment. The core element of the design is AT89C51, 3 groups of 4 bit mon anode digital tube is display devices. The design is using C language, simulating in a software simulation platform between Proteus and Keil, the design included the AT89C51Series MCU minimum system, and at the same time the design expanded some practical peripheral interface to deeply understand the application of 74LS247, LED seven digital tube structure and its working principle, and the display interface design mainly finished the timing and displaying A / B team scores and timely points, deduction, the alarming function etc. After finishing system design,it should be low cost, stable performance, high accuracy to display, convenient to operate easy to carry and so on. Suitable for all kinds of schools and small groups as the tournament scoring. Keywords: Basketball scoring screen。74LS247。Simulation 目 錄 第一章 緒 論 ..................................................................................................................... 6 引言 ............................................................................................................................. 6 國內(nèi)外研究現(xiàn)狀及發(fā)展趨勢 ..................................................................................... 6 第二章 系統(tǒng)總體方案設(shè)計(jì) ................................................................................................. 8 系統(tǒng)硬件方案設(shè)計(jì) ..................................................................................................... 8 系統(tǒng)軟件方案設(shè)計(jì) ..................................................................................................... 9 本章小結(jié) ................................................................................................................... 10 第三章 系統(tǒng)硬件設(shè)計(jì) ....................................................................................................... 11 硬件設(shè)計(jì)原理 ........................................................................................................... 11 AT89C51 簡介 [2] ......................................................................................................... 11 數(shù)碼管動態(tài)掃描顯示原理 [4] .................................................................................. 13 BCD—— 七段數(shù)碼管驅(qū)動 /譯碼器 [3] ...................................................................... 14 按鍵接口原理 ......................................................................................................... 15 硬件電路設(shè)計(jì) ........................................................................................................... 16 元器件的選擇 [3] ........................................................................................................ 17 計(jì)時顯示屏的設(shè)計(jì) ................................................................................................... 17 計(jì)分顯示屏的設(shè)計(jì) .................................................................................................... 18 鳴笛器的設(shè)計(jì) ........................................................................................................... 18 本章小結(jié) ................................................................................................................... 19 第四章 系統(tǒng)軟件設(shè)計(jì) ...................................................................................................... 20 軟件設(shè)計(jì)原理 ........................................................................................................... 20 定時器 /計(jì)數(shù)器 [2] ....................................................................................................... 20 發(fā)音原理及音樂知識 [4] ............................................................................................. 22 系統(tǒng)軟件設(shè)計(jì) [6] ........................................................................................................ 23 系統(tǒng)主程序設(shè)計(jì) ....................................................................................................... 23 時間顯示設(shè)計(jì) ........................................................................................................... 23 計(jì)分顯示設(shè)計(jì) ........................................................................................................... 26 鳴笛器設(shè)計(jì) ............................................................................................................... 27 本章小結(jié) ................................................................................................................... 28 第五章 Keil C 與 Protues 聯(lián)調(diào)及 仿真 .......................................................................... 29 Keil C 與 Protues 簡介 [7] ....................................................................................... 29 Keil C 與 Protues 聯(lián)調(diào)及仿真 [7] ........................................................................... 29 本章小結(jié) ................................................................................................................... 32 第六章 總 結(jié) ................................................................................................................... 33 參考文獻(xiàn) .............................................................................................