单片机实现步进电机控制系统-计中英文

Modelingmicro-controllerperipheralsforhigh-levelco-simulationandsynthesisMapabehavioronanembeddedsysteminvolveshardware-softwarepartitioningandassignmentofsoftwareandhardwaretaskstodifferentcomponents.Inparticular,softwaretasksinembeddedcontrollersaremostlyassignedtoamicro-controller.However,somemicro-controllerperipheralsareimplementedwithpartlyprogrammablecomponentsthatcanberegardedasverysimpleco-processorswithlimitedinstructionsetsandcapabilities.Embeddedsystemdesignersareusedtomapsomesimplesoftwaretasksontothesesimpleco-processors,obtainingoverallperformancesthatcanbeordersofmagnitudesuperiortotheonesobtainedmapallsoftwaretaskstothemicro-controlleritself.Inthispr,roposeamethodologytospecify,simulate,andpartitiontasksthatcanbeimplementedonprogrammablemicro-controllerperipheralssuchasTimingProcessingUnitsPUS).Followingourgeneralphilosophy,weletthedesignerproposeapartition,andweprovideanenvironment0toefficientlysimulateandevaluateaparticularimplementationchoice0toautomatedownstreamsynthesisforsoftware,hardware,aswellasperipheralprogrammingroutines.ImplementationandCaseWehaveimplementedsuchalibraryforthe68hcllfamilyofmicro-controllersfromMotorola.Itincludes:0Thetimerunit,implementinginputcaptureandoutputcomparefunctions,thatmeasuretimebetweeninputand0TheALIIconvertoutputeventsusinga16bitfreerunningcounter.0The generatorspresentonaspecificfamilymemberedforautomotiveapplications.Eachfunctionofthetimerunitandofthe generatorisdescribedbothatthebehaviorallevel,usingthesimulatortimingfunctionstoimplementtime,andattheRegisterTransferlevel,usingacycle-accuratemodelofthehardware.Thelatterisalsousedforhardwareandsoftwaresynthesis,iftheperipheralisnotused.Croutinesareusedtointerfacetotheperipheral.TheprecisionoftheRTLmodelcanbescaled,bydividingtheclock.Asinglesimulationparametercontrolsthisscalingwithoutaffectingtheoverallbehavior(apartfromthelossofprecision).Wehavespecifiedthefunctionalityofacompletedashboardcontroller,thatusesthe68hcl1peripherals.Note,withthestandardco-designmethods,usingonlyfullyprogrammableprocessorsorhardware,allthetasksimplementedbytheperipheralscouldbeimplementedonlyassoftwaretasks,thusyieldingalessperformingsolution,orashardwaretasks,thusyieldingahighercostandlessflexiblesolution.HencethemethodpresentedhereisrequiredinordertoobtainasolutionqualitycomparablewithmanualThespeedofthebehavioralsimulationwasabout260,000clockcyclespersecond.ThespeedoftheRTLsimulationrangedalmostlinearlyfrom2,000clockcyclespersecondto50,000clockcyclesdependingontheclockscalingfactor,from1to32.Theexperimentswereperformedona60MHzULTRAsparc.Atsynthesistime,theappropriateU0driversareextractedfromthelibraryandcustomizedbytheco-designtools.Wealsosynthesizedahardwareimplementationforthegeneratorsofthedashboardcontroller,becausetheyarenotavailableonallmembersofthe68hcllfamily.Weyzedthecosttrade-offsofusingsomesmallASICtoimplementthatfunction.Ahardwareimplementation,usingXILINXFPGAsforrapidprototypurposesrequired374CLBs(with203flip-flops)and60U0pads,thatwouldfitonaXILINX4010chip.Theproposedsolutionforhigh-levelspecificationofmicro-controllerperipheralsretainsmostoftheadvantagesandflexibilityofhardwaresoftwareco-design(uniformmodeling,fastco-simulation,formalverification,flexibilityinimplementation,.Thelimitisthatthedesignerhastodecideonwhetherornotafunctionisimplementableusingaparticularperipheral,andsometimessuchadecisionmustbemadeaboutperipheralsthatmaybeonlyslightlydifferentbetweendifferentmicro-controllers.Furtherresearchisstillneededtodevelopmaptechniquesfromanunbiasedspecificationtopartiallyprogrammabledevices.模拟单片机外设的高级共仿真和综在一个嵌入系统上的行为包括硬件-区分和对于不同成分上硬件和的任务。特别的,在嵌入控制上的任务由单片机执行。但是,一些单片机简单的共处理器,以获得把大规模指令转向获得所有任务的单片机本身。本文,打算法去叙述,仿真,和区分那些可能是被用于可设计的单片机割,且提供一个环境去