YH_F28335一体开发板套件光盘资料YH_F28335一体开发板套件光盘资料 part2DSP__28335_教程__13_BIOS

DSP/BIOS,Copyright2009TexasInstruments.Allrightsreserved.,Module12TMS320C28xMCUWorkshop,LearningObjectives,IntroductiontoDSP/BIOSDSP/BIOSConfigurationToolSchedulingDSP/BIOSthreadsPeriodicFunctionsReal-timeAnalysisToolsFlashProgrammingwithDSP/BIOS,LearningObjectives,IntroductiontoDSP/BIOSDSP/BIOSConfigurationToolSchedulingDSP/BIOSthreadsPeriodicFunctionsReal-timeAnalysisToolsFlashProgrammingwithDSP/BIOS,WhatisDSP/BIOS?,Afull-featured,scalablereal-timekernelSystemconfigurationtoolsPreemptivemulti-threadingschedulerReal-timeanalysistools,WhyUseDSP/BIOS?,HelpsManagecomplexsystemresourcesnoneedtodevelopormaintaina“home-brew”kernelfastertimetomarketEfficientdebuggingofreal-timeapplicationsReal-TimeAnalysisCreaterobustapplicationsindustryprovenkerneltechnologyReducecostofsoftwaremaintenancecodereuseandstandardizedsoftwareIntegratedwithCodeComposerStudioIDErequiresnoruntimelicensefeesfullysupportedbyTIUsesminimalMipsandMemory(2-8Kw)scalableuseonlywhatisneededeasilyfitsinlimitedmemoryspace,LearningObjectives,IntroductiontoDSP/BIOSDSP/BIOSConfigurationToolSchedulingDSP/BIOSthreadsPeriodicFunctionsReal-timeAnalysisToolsFlashProgrammingwithDSP/BIOS,DSP/BIOSConfigurationTool(file.tcf),SystemSetupToolsHandlesmemoryconfiguration(builds.cmdfile),run-timesupportlibraries,interruptvectors,systemsetupandreset,etc.Real-TimeAnalysisToolsAllowsapplicationtorununinterruptedwhiledisplayingdebugdataReal-TimeSchedulerPreemptivetreadmanagerkernelconfiguresDSP/BIOSschedulingReal-TimeI/OAllowstwowaycommunicationbetweenthreadsorbetweentargetandPChost,MemorySectionManager(MEM),GeneratesthemainlinkercommandfileforyourcodeprojectCreatememoriesPlacesectionsTocreateanewmemoryarea:Right-clickonMEMandselectinsertmemoryEnteryourchoiceofanameforthememoryRight-clickonthememory,andselectPropertiesfillinbase,length,space,MemorySectionManagerProperties,Toplaceasectionintoamemoryarea:Right-clickonMEMandselectPropertiesSelectthedesiredtab(e.g.Compiler)Selectthememoryyouwouldliketolinkeachsectionto,HardwareInterruptManager(HWI),ConfigToolusedtoassigninterruptvectorsVectorsareplacedinthesection.hwi_vecUseMEMmanagertolink.hwi_vectothepropermemory,FilesCreatedbytheConfigurationTool,*.tcf,Configtoolgeneratesfivedifferentfiles.cmdfileisgeneratedfromyourMEMsettingsVectorsputinto*cfg_c.c,save,tocompiler,Lab12a:ConfigurationTool,LabObjective:UseDSP/BIOSConfigurationToolto:HandlesystemmemoryandinterruptvectorsCreatea.tcffile,F28335,Memory,on-chipmemory,SystemDescription:TMS320F28335Allinternalmemoryblocksallocated,LearningObjectives,IntroductiontoDSP/BIOSDSP/BIOSConfigurationToolSchedulingDSP/BIOSthreadsPeriodicFunctionsReal-timeAnalysisToolsFlashProgrammingwithDSP/BIOS,DSP/BIOSThreadTypes,Priority,UseSWItoperformHWIfollow-upactivitySWIsarepostedbysoftwareMultipleSWIsateachof15prioritylevels,UseTSKtorundifferentprogramsconcurrentlyunderseparatecontextsTSKsenabledbypostingsemaphore(asignal),RunswhennoserviceroutinesarependingRunsasaninfiniteloop,liketraditionalwhileloopAllBIOSdatatransferstohostoccurhere,Usedtoimplementurgentpartofreal-timeeventTriggeredbyhardwareinterruptHWIprioritiesfixedinhardware,SWISoftwareInterrupts,HWIHardwareInterrupts,TSKTasks,IDLBackground,EnablingDSP/BIOSinmain(),BIOSwillenableglobalinterruptsforyouMustdeletetheendlessloopatendofmain()main()returnstoBIOSandgoestotheIDLEthread,allowingBIOStoscheduleevents,transferdatatothehost,etc.Anendlessloopinmain()willkeepBIOSfromrunning,voidmain(void)/*Initialization./*Enableglobalinterrupts/asm(“CLRCINTM”);/*MainLoop/while(1);/endofmain(),UsingHardwareInterrupts-HWI,Interruptpriorityfixedbyhardware,interruptvoidMyHwi(void),TheHWIDispatcher,Fornon-BIOScode,usetheinterruptkeywordtodeclareanISRtellsthecompilertoperformcontextsave/restore,ForDSP/BIOScode,usetheDispatchertoperformthesave/restoreRemovetheinterruptkeywordfromtheMyHwi()Checkthe“UseDispatcher”boxwhenyouconfiguretheinterruptvectorintheDSP/BIOSconfigurationtoolThisisnecessaryifyouwanttouseanyDSP/BIOSfunctionalityinsidetheISR,UsingSoftwareInterrupts-SWI,MakeeachalgorithmanindependentsoftwareinterruptSWIschedulingishandledbyDSP/BIOSHWIfunctiontriggeredbyhardwareSWIfunctiontriggeredbysoftwaree.g.acalltoSWI_post()WhyuseaSWI?NolimitationonnumberofSWIs,andprioritiesforSWIsareuser-definedSWIcanbescheduledbyhardwareorsoftwareevent(s)DeferprocessingfromHWItoSWI,SWIProperties,ManagingSWIPriority,DragandDropSWIstochangepriorityEqualprioritySWIsrunintheorderthattheyareposted,PriorityBasedThreadScheduling,HWI2HWI1SWI3SWI2SWI1MAINIDLE,int1,rtn,post2,rtn,int2,post3,rtn,post1,rtn,rtn,rtn,Usersetsthepriority.BIOSdoesthescheduling,(highest),(lowest),SWI_post(,UsingTasks(TSK)SWIvs.TSK,Similartohardwareinterrupt,buttriggeredbySWI_post()SWIsmustruntocompletionAllSWIsusesystemstackfastercontextswitchingsmallercodesize,SWI,SWI_post,start,end,“mustruntocompletion”,SEM_post()readiestheTSKwhichpendsonaneventTSKscanbeterminatedbyS/WEachTSKhasitsownstackslowercontextswitchinglargercodesize,TSK,start,end,Pause,SEM_post,(blockedstate),SEM_pend,LearningObjectives,IntroductiontoDSP/BIOSDSP/BIOSConfigurationToolSchedulingDSP/BIOSthreadsPeriodicFunctionsReal-timeAnalysisToolsFlashProgrammingwithDSP/BIOS,UsingPeriodicFunctions-PRD,PeriodicfunctionsareaspecialtypeofSWIthataretriggeredbyDSP/BIOSPeriodicfunctionsrunatauserspecifiedrate:-e.g.LEDblinkrequires0.5HzUsetheCLKManagertospecifytheDSP/BIOSCLKrateinmicrosecondsper“tick”UsethePRDManagertospecifytheperiod(forthefunction)inticksAllowsmultipleperiodicfunctionswithdifferentrates,CreatingaPeriodicFunction,LearningObjectives,IntroductiontoDSP/BIOSDSP/BIOSConfigurationToolSchedulingDSP/BIOSthreadsPeriodicFunctionsReal-timeAnalysisToolsFlashProgrammingwithDSP/BIOS,Built-inReal-TimeAnalysisTools,Gatherdataontarget(3-10CPUcycles)SenddataduringBIOSIDL(100sofcycles)Formatdataonhost(1000sofcycles)DatagatheringdoesNOTstoptargetCPU,ExecutionGraph,ShowsamountofCPUhorsepowerbeingconsumed,CPULoadGraph,SoftwarelogicanalyzerDebugeventtimingandpriority,Built-inReal-TimeAnalysisTools,Profileroutinesw/ohaltingtheCPU,StatisticsView,SenddebugmsgstohostDoesnthalttheDSPDeterministic,lowDSPcyclecountMoreefficientthantraditionalprintf(),MessageLOG,LOG_printf(,Lab12b:DSP/BIOS,Objective:ChangeDMADINTCH1_ISRHWItoSWIReplaceLEDblinkroutinewithaPeriodicFunction,ADC,RESULT0,ePWM2,connectorwire,ADCINA0,TBCounterCompareActionQualifier,ePWM1,ePWM2triggeringADConperiodmatchusingSOCAtriggerevery20.833s(48kHz),datamemory,Pointerrewind,DisplayusingCCS,DMA,ping,CPUrunsdatathroughfilterduringDMAISR,pong,datamemory,LearningObjectives,IntroductiontoDSP/BIOSDSP/BIOSConfigurationToolSchedulingDSP/BIOSthreadsPeriodicFunctionsReal-timeAnalysisToolsFlashProgrammingwithDSP