單片機搶答器畢業(yè)論文


摘  要
數(shù)字搶答器由主體電路與擴展電路組成。優(yōu)先編碼電路、鎖存器、譯碼電路將參賽隊的輸入信號在顯示器上輸出；用控制電路和主持人開關啟動報警電路，以上兩部分組成主體電路。通過定時電路和譯碼電路將秒脈沖產生的信號在顯示器上輸出實現(xiàn)計時功能，構成擴展電路。經(jīng)過布線、焊接、調試等工作后數(shù)字搶答器成形。單片機體積小價格低，應用方便，穩(wěn)定可靠。單片機將很多任務交給了軟件編程去實現(xiàn)，大大簡化了外圍硬件電路，使外圍電路的實現(xiàn)簡單方便。單片機系統(tǒng)的硬件結構給予了搶答系統(tǒng)“身軀”，而單片機的應用程序賦予了其新的“生命”，使其在傳統(tǒng)的搶答器面前具有電路簡單、成本低、運行可靠等特色。對于搶答器我們大家都知道那是用于選手做搶答題時用的，選手進行搶答，搶到題的選手來回答問題。搶答器不僅考驗選手的反應速度同時也要求選手具備足夠的知識面和一定的勇氣。選手們都站在同一個起跑線上，體現(xiàn)了公平公正的原則。

關鍵字： 搶答電路 定時電路 報警電路

 
a compendium

Digital vies to implement by corpus circuit and expansion circuit composed. Priority coding circuit, latches, decoder circuit will be the team's input signal on the display output, With the control circuit and the host switches on the alarming circuit, the above two parts subject circuit. Through the timing circuit and decoder circuit will seconds pulse signal on the display output of timing function, constitute expansion circuit. After wiring, welding, commissioning work digital vies to implement forming. In practical circuit design, need to go through the simulation software testing of circuit and programs compiled, check the periphery circuit design is reasonable, software compiler are proper and that the software and hardware circuit can normal work, can accurate realization design functions. If the test circuit emulation by, no problem can fully realize function words can actually do plate welding work.. SCM small volume low prices, easy application, it is stable and reliable. Microcontroller will many missions gave software programming to realize, greatly simplifying the peripheral hardware circuit, make the periphery the circuitry is simple and convenient.

Key word: scare-answering circuit timing circuit alarm circuit

 
目錄

第一章  數(shù)字搶答器的概述及制作要求 - 8 -
1.1  數(shù)字搶答器的概述 - 8 -
1.2  設計任務與要求 - 8 -
第二章 單片機芯片的選擇及搶答器方案 - 11 -
2.1單片機芯片的選擇 - 11 -
2.2模塊性能分析 - 14 -
第三章  硬件電路設計 - 16 -
3.1總體設計 - 16 -
3.2 外部振蕩電路 - 17 -
3.3  復位電路的設計 - 17 -
第四章  系統(tǒng)軟件設計 - 20 -
4.1 搶答器流程圖 - 20 -
4.2 主程序 - 22 -
4.3 中斷程序 - 25 -
第五章  產品的樣品 - 28 -
結束語 - 29 -
參考文獻 - 30 -
致　　謝 - 31 -