5自动化专业 单片机 外文文献 英文文献 外文翻译中英对照大学毕业论文Word格式.docx

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Analyseitsscopeofapplication,provideandusethecircuitconcretly;

Combinetheinstance,analysethecharacteristicofthehardwareandsoftwaredesignunderthesekindofoperationway.

Keyword:

One-chipcomputerRestoretothethrone/dormancyanti-interferenceForeword

Introduction:

Withthedevelopmentatfullspeedofthemicroelectrictechnique,theperformanceoftheone-chipcomputerimprovesrapidly,demonstratetheoutstandingadvantageintheoperation,logiccontrol,intelligentrespect,replacedandenlargedthemeasuringthatthecircuitmadeup,controlcircuitbydigitallogicalcircuit,operationoriginallytoagreatextent,useveryextensivly.Butbecauseithavesystemhalted,procedureruncriticaldefectofflyingetc,makeitlimitinalotofimportantapplicationofoccasion.Alotoftechnologyinanti-interference,forexamplesetupthesoftwaretrap,addthehardwaretoguardthegateindog'

scircuitetc,canmakethisproblemhavebettersettlement,butstilltheexistingproblem:

①Guardthegatedogatthemovement,meanandappearmistakealreadyandrunsometime,thisisnotallowedinsomeoccasions;

②Procedureappearcirculationmistakeverymuchsometimes,butjustguardthegatedogcontrollinkincludeandenter,adoptandguardthegateastosuchamistakedogunabletodiscern;

③Inmeasureandcontrolcycleamongthelongsystem,one-chipcomputerspendwaitfortheperipheralhardwarealargeamountoftime,willbeinterferedtoowhencarryoutandwaitfortheorder.Tothesesituations,wehavetriedthemethodrestoredtothethronevoluntarilyinpractice,alternatepulseofadoptingetcorrestoretothethronewakingaccordingtoexternaltermstotheone-chipcomputerup.Afterbeingrestoredtothethroneeachtime,theone-chipcomputercarriesoutthecorrespondingprocedure,entersdormancyintimeafterfinishingcarryingoutthetask,waittoberestoredtothethronenextly.Havesolvedabove-mentionedproblemswellwiththismethod,andhasgotbetterresultintheagriculturalvoltagetransformercomprehensiveprotectorexperiment.Nowtake51serialone-chipcomputersasanexampleandprobeintotheconcreteprincipleandimplementationmethod,restoredtothethronethesignalasthehighlevel.

1.Aprincipleandimplementationmethod

1.1Restoredtothethronethelawregularlyunconditionally

Usetimer,special-purposeclockchiporotherpulsegenerator,producesignalofrestoringtothethroneregularlyaccordingtointervalthatsetfor.Thiskindofmethodisespeciallysuitableforthemeasuringinstrument.Innotrunningactually,sampletheanalogquantityofintroductionwithA/Dconverteroften,thenstoreshowing.Thiscourseisveryfast,butsteadyforreading,thedatapersecondareonlyupgraded1-2times,alargeamountoftimeofCPUisusedforwaiting.LetCPUcarryoutandenterdormancydirectlyafterthetask,restoretothethroneandwakebyexternalworldupItcarryoutthenextoperation,thisistorestoretothethronethelawregularlyInthiswaycanmakeanti-interferenceabilitystrengthengreatly,have2pointsmainly:

①.Atthedormancy,procedurestoprun,canappearPCindicatordisorderlyprocedurethatcausesrunandfly.Worktimeindormancyproportion1:

9,thatistosay1shave0.1timeofsusedformeasuring,sendingoffshowing,thereistimedormancyof0.9s,theprobabilitythattheprocedureisinterferedis1/10whilerunningatfullspeed,wholeanti-interferenceabilityraiseby10times.②Becauseevery1sisrestoredtothethroneonceunconditionally,oncepresentthesystemhaltedduringajob,cancertainlyresumewhenrestoredtothethronenexttime.Astoonlyinstrumentthatshow,somereadingmistakethat1sappearaccidentallythereisnomemorytothenextmeasurement,becouldbear,belongto“pass”mistake.Thiskindisrestoredtothethronetheadvantageofdog'

scircuitforguardingthegateregularly,first,changewaitingtimeintoadormancystate,timetoshortenandmaybeinterfered;

Second,avoidedhappenningthatthedogcontrolsthedeathcirculationofthelinktoincludeguardingthegate.

1.2Theexternalconditionisrestoredtothethronethelaw

Somearrivalthatexportormeasureiscontrolledbytheoutside.Forinstance,thehotform.ofheating,rotatethepulseproducedandcalculateheatbyhotwaterwaterwheels,thereisnohotwatertoflow,thereisnoheattoexport,CPUonlyneedinfactkeepnumbervalue,donotneedtocount.Canimaginehotwaterwaterwheelsrotatewhenparkingwarm,CPUidleinwillitbewillitbeoneseasonautumnspringandsummer,Ifletdormancyits,measurehavewaterwheelspulseconstantly,anti-interferenceabilitycanstrengthengreatly.So,solongaslinkuptherestoringtothethroneofthepulseofthewaterwheelsandCPU,thewaterwheelsrotateacircleeachtime,CPUisrestoredtothethroneonce,hotform.canworknormally,thisisrestoredtothethronethelawbytheexternalcondition.Similarapplicationhavehalfelectronkilowatt-hourmeter,goononecountjustwhenthemachinerydegreewheelsandtransferstoacircle,usersdonotneedtheelectricity,CPUhasbeenknowingthedormancyallthetime.Therestoringtothethroneintheintervalnottoberegular,butconfirmedaccordingtotheexternalconditionofthismethod.Insomeoccasions,thetimeofthedormancywillbeverylong,veryeffectivetoimprovinganti-interferenceability.

2.Thehardwarerealizesthemainpoint

2.1Restoredtothethroneregularlyunconditionally

Generallyhave2kindsofmethods.①Usetheitimerorthespecial-purposeclockchiptoberestoredtothethrone.Fig1,inordertousethetimingcircuitthat555circuitmakesup;

CanusetheclockchipsofX1126,etctoo,wakeCPUupwiththealarmsignalaftersettingupwarningtime.Thiskindofmethodissuitablewhenthelongintervalismade,canalsofollowtheresultofthisoperation，determinetowaketimeupinalarmnexttimetemporarily,veryflexibleandconvenient.②Thesignalofusingthesystemtobeinherentisasreducingthepulseregularly.Use50Hzworkerpowermakereducingafterhavingafaceliftfrequently,alreadyomitthetimer,gatheredthecorrespondingsignalforthephaseplacewhichmeasuredtheelectriccurrentsignalatthesametime,asFig.2shows.

2.2Externalconditionsarerestoredtothethrone

Sendexternalconditionpulsetoandisrestoredtothethronetheendsonafterhavingafacelift.Tothatabove-mentionedwaterwheelsortheammeterspendapulseproduced,canuseSchmitt'

striggertohaveafacelift;

Forwritingdowntheinstrumentofthebiggestorminimum，canusethewindowcomparator.Inordertorealizetheelectronizationthatisregulated，canusetheelectronicelectricpotentialdevice,establishupperandlowerlimitswiththeorderoftheone-chipcomputer.

2.3Reducecycleandrestoredtothethronethehighelectricityatordinarytimes

InFig3,restoredtothethronethesignalduringhighlevelTr,theone-chipcomputerisinthestateofrestoringtothethrone,theproceduredoesnotrun,anti-interferenceabilityisthestrongest;

Afterthehighlevel,theone-chipcomputerbeginstoholdtheconductprocedure.Thatistosay,arerestoredtothethroneandsuitableforthetimethattheprocedurecarriesoutduringthelowlevelTdofthesignal,thistimeshouldbegreaterthantheexecutioncycleoftheprocedureeachtime.Itisrestoretothethronecycleandrestoretothethronehighlevelofsignaltakeemptythanverymuchimportanttochooserationally.Astosimpletoshowinstrument,restoretothethronecycledeterminedatabreakcycle,lowelectricityisitmeasure,hancloveralltimeshowntogreaterthantowantatordinarytimes;

Otherwise,cantpresentforeverthemistakeoftheintactexecutiveprogram.MonolithicintegratedcircuitinTsandTrperiodallcaneffectivelytheantijamming,butisbesttheunnecessarytimearrangementinTr.Whentheprogramtimeislong,whenasfaraspossibletherequestreducesTr,mayjointhedifferentiatingcircuit,likechart1centerC30,R26,D9.

2.4Treatmentofoutputendsons

（1）Restoretothethronestraightpulse

DuringallI/Omouthofone-chipcomputerturnintothehighlevelwhenrestoringtothethrone.Thatistosayoutputforlowpinnormally,willaccordingtorestoretothethronecycleappearthewidthforthestraightpulseofTr.Thisstraightpulsewillinfluencethenormaloutput,2methodsaredealtwith:

① 

Connectinparallelelectriccapacitysuppress,capacityconfirmaccordingtoTrtimethatrestoretothethroneonthesoninend.ReducingTrcanbereducedandconnectedtheelectriccapacityinparallel.②Itisinvalidtodesigntheperipheralcircuitintothehighlevel.

（2）Fault-tolerant

Choosethecapacitythattheoutputendconnectstheelectriccapacityinparallelfault-tolerantlyandproperly,canrealizefault-tolerantcontrol.Reducedcycleinacertain,becauseinterferedexportingthewronglevel.Becausethekeepingfunctionofelectriccapacity,can'

tstillenableexportingthechangetothevalidlevelwithinthiscycle;

Nextcycle,themistakeiscorrected.So,solongasdoesnotmakemistakesin2cyclesinsuccession,itisveryfault-toleranttoexportCertainly,thiskindofmethodwillmakethenormaloutputchangelagbehindforonecycle,justreallyreflecttheoutputendson.

2.5hastheelectricitytomeasureandre