浙江工業大學浙西分校信電系系畢業論文(中英文資料)Modelingmicro-controllerperipheralsforhigh-levelco-simulationandsynthesisMappingabehavioronanembeddedsysteminvolveshardware-softwarepartitioningandassignmentofsoftwareandhardwaretaskstodifferentcomponents.Inparticular,softwaretasksinembeddedcontrollersaremostlyassignedtoamicro-controller.However,somemicro-controllerperipheralsareimplementedwithpartlyprogrammablecomponentsthatcanberegardedasverysimpleco-processorswithlimitedinstructionsetsandcapabilities.Embeddedsystemdesignersareusedtomappingsomesimplesoftwaretasksontothesesimpleco-processors,obtainingoverallperformancesthatcanbeordersofmagnitudesuperiortotheonesobtainedmappingallsoftwaretaskstothemicro-controlleritself.Inthispaper,weproposeamethodologytospecify,simulate,andpartitiontasksthatcanbeimplementedonprogrammablemicro-controllerperipheralssuchasTimingProcessingUnitsPUS).Followingourgeneralphilosophy,weletthedesignerproposeapartition,andweprovideanenvironment0toefficientlysimulateandevaluateaparticularimplementationchoice0toautomatedownstreamsynthesisforsoftware,hardware,aswellasperipheralprogrammingroutines.1ImplementationandCaseStudyWehaveimplementedsuchalibraryforthe68hcllfamilyofmicro-controllersfromMotorola.Itincludes:0Thetimerunit,implementinginputcaptureandoutputcomparefunctions,thatmeasuretimebetweeninputand0TheALIIconvertoutputeventsusinga16bitfreerunningcounter.0ThePWMgeneratorspresentonaspecificfamilymembertargetedforautomotiveapplications.EachfunctionofthetimerunitandofthePWMgeneratorisdescribedbothatthebehaviorallevel,usingthesimulatortimingfunctionstoimplementtime,andattheRegisterTransferlevel,usingacycle-accuratemodelofthehardware.Thelatterisalsousedforhardwareandsoftwaresynthesis,iftheperipheralisnotused.Croutinesareusedtointerfacetotheperipheral.TheprecisionoftheRTLmodelcanbescaled,bydividingtheclock.Asinglesimulationparametercontrolsthisscalingwithoutaffectingtheoverallbehavior(apartfromthelossofprecision).Wehavespecifiedthefunctionalityofacompletedashboardcontroller,thatusesthe68hcl1peripherals.Note,withthestandardco-designmethods,usingonlyfullyprogrammableprocessorsorhardware,allthetasksimplementedbytheperipheralscouldbeimplementedonlyassoftwaretasks,thusyieldingalessperformingsolution,orashardwaretasks,thusyieldingahighercostandlessflexiblesolution.Hencethemethodpresentedhereisrequiredinordertoobtainasolutionqualitycomparable浙江工業大學浙西分校信電系系畢業論文(中英文資料)withmanualdesign.Thespeedofthebehavioralsimulationwasabout260,000clockcyclespersecond.ThespeedoftheRTLsimulationrangedalmostlinearlyfrom2,000clockcyclespersecondto50,000clockcyclesdependingontheclockscalingfactor,from1to32.Theexperimentswereperformedona60MHzULTRAsparc.Atsynthesistime,theappropriateU0driversareextractedfromthelibraryandcustomizedbytheco-designtools.WealsosynthesizedahardwareimplementationforthePWMgeneratorsofthedashboardcontroller,becausetheyarenotavailableonallmembersofthe68hcllfamily.Weanalyzedthecosttrade-offsofusingsomesmallASICtoimplementthatfunction.Ahardwareimplementation,usingXILINXFPGAsforrapidprototypingpurposesrequired374CLBs(with203flip-flops)and60U0pads,thatwouldfitonaXILINX4010chip.2ConclusionTheproposedsolutionforhigh-levelspecificationofmicro-controllerperipheralsretainsmostoftheadvantagesandflexibilityofhardwaresoftwareco-design(uniformmodeling,fastco-simulation,formalverification,flexibilityintargetimplementation,.Thelimitisthatthedesignerhastodecideonwhetherornotafunctionisimplementableusingaparticularperipheral,andsometimessuchadecisionmustbemadeaboutperipheralsthatmaybeonlyslightlydifferentbetweendifferentmicro-controllers.Furtherresearchisstillneededtodevelopmappingtechniquesfromanunbiasedspecificationtopartiallyprogrammabledevices.浙江工業大學浙西分校信電系系畢業論文(中英文資料)模擬單片機外設的高級共仿真和綜合映射在一個嵌入系統上的行為包括硬件-軟件區分和對于不同成分上硬件和軟件的任務。特別的,在嵌入控制上的軟件任務由單片機執行。但是,一些單片機外圍設備一起實現部分可設計的成分,這些成分被當作限制性的指令組合和能力的非常簡單的共處理器。嵌入系統設計者習慣于把一些簡單的軟件工作映射到這些簡單的共處理器,以獲得把大規模指令轉向獲得映射所有軟件任務的單片機本身。本文,我們打算一種方法去敘述,仿真,和區分那些可能是被用于可設計的單片機外圍設備,比如時間處理單元(TPUs)。通過我們的一般原理,我們讓設計者計劃分割,且我們提供一個環境去有效仿真和評估一個特殊執行選擇。為軟件,硬件和外圍設備規劃常式自動化下游的綜合。1、落實和個案研究我們已經實現了來自摩托羅拉的單片機68hcll系列。它包括:定時單元,實現輸入攝入輸出比較功能,使用16位自由運行計算器的輸入和輸出兩者間的測試時間。A/D轉換器PWM產生器在一個特定的系列成員上為汽車的申請對準。我們已經敘述完全的儀表板控制器的功能性,這些控制器使用68hcl1外圍設備。注意共設計方法的標準,使用只有完全可設計的處理器或硬件,所有的被外設實現的工作能僅僅如軟件工作那樣實現,如此產生一個更高的成本和更少靈活的方法。因此,在這里呈現的方法被要求為了獲得一個解決特性相比較手動設計。行為模擬速度大約是260000時鐘循環每秒。RTL模擬速度范圍從2000時鐘循環每秒到5000時鐘循環每秒線性變化,依靠時鐘計數因素，從1到32。試驗在60MHZ的ULTRAsparc上被運行。綜合時間,適當的I/O驅動從圖書館和有共設計工具的客戶上被修改。我們也為儀表板控制器的PWM產生器綜合硬件實現,因為他們在68hcll單片機系列所有成員不是適當的