基于單片機(jī)的秒表系統(tǒng)設(shè)計(jì)

基于單片機(jī)的秒表系統(tǒng)設(shè)計(jì)工程學(xué)院：通信工程I要點(diǎn)是:計(jì)tractInthepresentera,isanewtechnologyemergeinanendlessstreamtime.Inthefieldofelectronics,especiallytheintelligentautomaticcontrolfield,thetraditionaldiscretecomponentsordigitallogiccircuitofthecontrolsystemisatanunprecedentedpacewasreplacedbyintelligentcontrolsystem.SCMhastheadvantagesofsmallvolume,strongfunction,lowcost,wideapplicationrangeandotheradvantages,cansay,intelligentcontrolandautomationisthecoreofscm.SCMistheemergenceofmodernscienceandtechnologydevelopmentofanimportantmilepost.Asthesingle-chiphighintegration,strongfunction,goodversatility,especiallyithastheadvantagesofsmallvolume,lightweight,lowenergyconsumption,lowprice,thesinglechipmicrocomputerrapidlyspreading,hasnowbecomethemeasurementcontrolintheapplicationsystemofoptimizationmodelsandthenewelectronicproductkeyparts.Thisdesignistheuseofasinglechipcomputercontrolledmulti-functionstopwatchsystem,whichisbasedonthe51seriessingle-chipsystemdesign.ItusesAT89C51microcontrollerasthecenterdevice,usethetimer/countertimingandcountingprinciples,combinedwithdisplaycircuit,powersupplycircuit,LEDdigitaltubeandakeyboardcircuittodesignthetimer.Thesoft,hardwarecombination,sothatthesystemcanachievefourLEDdisplay,maximumdisplaytimeis59.9seconds,eachMSadd1,astartbutton,apausebutton,aresetbutton,theutilitymodelhastheadvantagesofsmallvolume,off-siteoperations:,lowestpowerconsumption,tousethebatteryasapower,compacthardwarestructure,simpleandflexiblesoftwaredesign.Finallythroughthesimulationdebugging,intheProteusenvironmenttoestablishthesimulationmodel,thesimulationresultsshowthatthedesigniscorrect.Keywordssinglechipmicrocomputer;stopwatchclockcircuit;systemdesign 1鐘，數(shù)據(jù)存儲(chǔ)器(相當(dāng)于計(jì)算機(jī)的內(nèi)存)、輸入輸出端口等。雖然它的運(yùn)算速度無(wú)法和計(jì)機(jī)硬件電路的設(shè)計(jì)并進(jìn)行軟件編程利用單片機(jī)定時(shí)器/計(jì)數(shù)器中斷設(shè)計(jì)秒表，從而實(shí)秒2(1)利用單片機(jī)定時(shí)器/計(jì)數(shù)器中斷設(shè)計(jì)秒表，從而實(shí)現(xiàn)秒、十分之一秒的計(jì)知(3)通過(guò)本次系統(tǒng)設(shè)計(jì)加深對(duì)單片機(jī)掌握定時(shí)器、外部中斷的設(shè)置和編程原理應(yīng)計(jì)3及硬件設(shè)計(jì)總體方案單片機(jī)計(jì)思路本次實(shí)驗(yàn)設(shè)計(jì)的基本思路是要求借助AT89C51單片機(jī)做出一個(gè)0-59.9s的秒表從計(jì)4計(jì)要求(1)用單片機(jī)AT89C51實(shí)現(xiàn)；(2)以0.1秒為最小單位進(jìn)行顯示；(3)秒表量程為0.0-59.9秒，用LED顯示；(4)有清零、開始、停止功能、每到一秒有聲音提示。 5主要性能(1)與MCS-51兼容。(2)4K字節(jié)可編程閃爍存儲(chǔ)器。HzHz。(4)三級(jí)程序存儲(chǔ)器鎖定。RAM(8)6個(gè)中斷源。(9)可編程串行通道。(10)片內(nèi)振蕩器和時(shí)鐘電路。.2引腳功能說(shuō)明HP6于外部下拉為低電平，P3口將輸出電流(ILL)這是由于上拉的緣故。EA/VPP：當(dāng)/EA保持低電平時(shí)，則在此期間外部程序存儲(chǔ)器(0000H-FFFFH)，不A程電源(VPP)。路設(shè)計(jì)7件電路設(shè)計(jì)8P3顯示電路9鍵盤電路以使用，為了使程序簡(jiǎn)化，我們采用按鍵電路，用部分P3口做開關(guān)，P3.0啟動(dòng)，NNYNN加一NNYNN加一流程圖YYYYYNNYN中斷、秒自動(dòng)增塊設(shè)計(jì)(1)啟動(dòng)/停止(2)清零MLLCALLDISPPCONTROL;PRYPML1PLOOP1HHHLJMPML1系統(tǒng)調(diào)試與仿真1仿真軟件簡(jiǎn)介E(1)全部滿足我們提出的單片機(jī)軟件仿真系統(tǒng)的標(biāo)準(zhǔn)，并在同類產(chǎn)品中具(2)具有模擬電路仿真、數(shù)字電路仿真、單片機(jī)及其外圍電路組成的系統(tǒng)D(4)支持大量的存儲(chǔ)器和外圍芯片。圖4-1Proteus啟動(dòng)畫面在Proteus繪制好原理圖后，調(diào)入已編譯好的目標(biāo)代碼文件：*.HEX，可以在Proteus的原理圖中看到模擬的實(shí)物運(yùn)行狀態(tài)和過(guò)程。Proteus不僅可將許多單片機(jī)實(shí)例功能形象化，也可將許多單片機(jī)實(shí)例運(yùn)行過(guò)程形象化。前者可在相當(dāng)程度上得到實(shí)物演示實(shí)驗(yàn)的效果，后者則是實(shí)物演示實(shí)驗(yàn)難以達(dá)到的效果。它的元器件、連接線路等卻和傳統(tǒng)的單片機(jī)實(shí)驗(yàn)硬件高度對(duì)應(yīng)。這在相當(dāng)程度上替代了傳統(tǒng)的單片機(jī)實(shí)驗(yàn)教學(xué)的功能。和一個(gè)功能強(qiáng)大的仿真調(diào)試器等在內(nèi)的完整開發(fā)方案，通過(guò)一個(gè)集成開發(fā)環(huán)境 WINXP等操作系統(tǒng)。如果你使用C語(yǔ)言編程，那么Keil就成為不二之選，即使Vision.2仿真調(diào)試es(4)當(dāng)按下“清零”時(shí)秒表無(wú)論是在計(jì)時(shí)還是在停止?fàn)顟B(tài)都一律清零各數(shù)5總結(jié)M2009.M010.M07.MJM.M社,2010.設(shè)計(jì)源程序:HAOMIAOEQU34HMIAOEQU35HSHIMIAOEQU6HGHAJMPSTARTGHSETBP1.6SETBP1.5MOVHAOMIAO#0MOVMIAO#0MOVSHIMIAO,#0MOVDPTR#TABLEMOVA#00HMOVCA@A+DPTRCLRP1.6MOVP2,AMOVA#00HMOVCA@A+DPTRMOVP2,AMOVDPTR#TABLE1MOVA#00HMOVCA@A+DPTRCLRP1.5MOVP2,AAISHIAINSHIWEI:SETBP1.5MOVDPTR#TABLEMOVMIAO#0NCSHIMIAOMOVASHIMIAOTJMPMAINTINGZHIMOVA0HMOVAP3ANLA#04HTMOVA#00HMOVAP3ANLA#02HNSHINGZHIRTLJMPSTARTEILJMPSHIWEIMAIN:SETBP1.5SETBP1.6MOVA#00HMOVAP3ANLA#04HRTMOVA#00HMOVAP3ANLA#02HHIMOVDPTR#TABLEMOVAHAOMIAOZHENANSHIJMPMAINIAOZHENMOVDPTR#TABLE1MOVHAOMIAO#0MOVAMIAOIWEILLSNDJMPMAINYANSHIMOVR#30DLMOVA,#00HMOVAP3ANLA#04HRTMOVDPTR#TABLEMOVASHIMIAOMOVCA@A+DPTRCLRP1.6MOVP2,ACALLYIHAOMIAOSETBP1.6MOVAHAOMIAOMOVCA@A+DPTRMOVP2,ACALLYIHAOMIAOMOVDPTR#TABLE1MOVAMIAOMOVCA@A+DPTRCLRP1.5MOVP2,ACALLYIHAOMIAOSETBP1.5DJNZR