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1、河南工業(yè)職業(yè)技術(shù)學(xué)院畢業(yè)論文摘要單片機自20世紀(jì)70年代問世以來,以其極高的性能價格比,受到人們的重視和關(guān)注,應(yīng)用很廣、發(fā)展很快。單片機體積小、重量輕、抗干擾能力強、環(huán)境要求不高、價格低廉、可靠性高、靈活性好、開發(fā)較為容易。由于具有上述優(yōu)點,在我國,單片機已廣泛地應(yīng)用在工業(yè)自動化控制、自動檢測、智能儀器儀表、家用電器、電力電子、機電一體化設(shè)備等各個方面,而51單片機是各單片機中最為典型和最有代表性的一種。這次畢業(yè)設(shè)計通過對它的學(xué)習(xí)、應(yīng)用,以AT89S51芯片為核心,輔以必要的電路,設(shè)計了一個簡易的電子時鐘,它由4.5V直流電源供電,通過數(shù)碼管能
2、夠準(zhǔn)確顯示時間,調(diào)整時間,從而到達學(xué)習(xí)、設(shè)計、開發(fā)軟、硬件的能力。電子時鐘是采用數(shù)字電路實現(xiàn)對“時”、“分”、“秒”數(shù)字顯示的計時裝置。電子時鐘的精度、穩(wěn)定度遠(yuǎn)遠(yuǎn)超過老式機械鐘。在這次設(shè)計中,我們采用LED數(shù)碼管顯示時、分、秒,以24小時計時方式,根據(jù)數(shù)碼管動態(tài)顯示原理來進行顯示,用12MHz的晶振產(chǎn)生振蕩脈沖,定時器計數(shù)。在此次設(shè)計中,電路具有顯示時間的其本功能,還可以實現(xiàn)對時間的調(diào)整。電子時鐘是其小巧,價格低廉,走時精度高,使用方便,功能多,便于集成化而受廣大消費的喜愛,因此得到了廣泛的使用。關(guān)鍵詞:單片機;AT89S5131河南工業(yè)職業(yè)技
3、術(shù)學(xué)院畢業(yè)論文ABSTRACTSincethe1970schipsincetheadvent,withitshighcostperformanceandattentionbypeopleandattention,itiswidelyusedandfastdevelopment.SCMsmallvolume,lightweight,stronganti-jammingcapability,environmentaldemandisnothigh,lowcost,highreliability,flexibilityisgood,developme
4、ntmoreeasy.Becauseoftheabovefeatures,inourcountry,themicrocontrolleriswidelyusedinindustrialautomationcontrol,automaticdetection,intelligentinstrumentandapparatus,householdappliances,powerelectronics,mechanicalandelectricalequipment,andotheraspects,and51SCMisthemosttypicalch
5、ipandmostrepresentativeone.Thegraduationdesignthroughtoitsstudy,applicationtoAT89S51chipsasthecore,withthenecessarycircuit,designofasimpleelectronicclock,itby4.5Vdcpowersupply,throughtheelectronictubecanshowtime,adjustthetime,thustolearning,thedesign,thedevelopmentofsoftware
6、andhardwareintheability.ElectronicClockisaelectroniccircuitimplementationofthe"when","sub","seconds"Thefiguresshowthetimingdevice.Electronicclockprecision,stability,farmorethantheoldmechanicalclock.Inthisdesign,weuseLEDelectronicdisplayhours,minutes,seconds,to24-hourtimemode
7、,accordingtoelectroniccontroltheorytodynamicdisplaytodisplay,usethe12MHzcrystaloscillation31河南工業(yè)職業(yè)技術(shù)學(xué)院畢業(yè)論文pulse,thetimercount.Inthisdesign,thecircuithasadisplaytimeofthethisfunction,youcanalsorealizethetimeadjustment.Electronicclockisitscompact,lowcost,traveltimeandhighpreci
8、sion,easytouse,featuresandmore,easyintegrationandlovedbythegeneralconsumer,