DSP28335教程3专业知识讲座

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TOModule2TMS320C28x™MCUWorkshop第1页LearningObjectivesUseCodeComposerStudioto:CreateaProjectSetBuildOptionsCreateauserlinkercommandfilewhich:Describesasystem’savailablememoryIndicateswheresectionswillbeplacedinmemory第2页LearningObjectivesUseCodeComposerStudioto:CreateaProjectSetBuildOptionsCreateauserlinkercommandfilewhich:Describesasystem’savailablememoryIndicateswheresectionswillbeplacedinmemory第3页CodeComposerStudioCodeComposerStudioincludes:IntegratedEdit/DebugGUICodeGenerationToolsDSP/BIOSAsmLinkEditorDebugCompileGraphs,ProfilingCodeSimulatoreZdsp™ExternalEmulatorMCUBoardLibrarieslnk.cmdBuild第4页CodeComposerStudio:IDEIntegrates:edit,codegeneration,anddebugSingle-clickaccessusingbuttonsPowerfulgraphing/profilingtoolsAutomatedtasksusingGELscriptsandCCSscriptingBuilt-inaccesstoBIOSfunctionsSupportsTIand3rdpartyplug-ins第5页TheCCSProjectListoffiles:Source(C,assembly)LibrariesDSP/BIOSconfigurationfileLinkercommandfilesProjectsettings:Buildoptions(compiler,Linker,assembler,andDSP/BIOS)BuildconfigurationsProject(.pjt)filescontain:第6页BuildOptionsGUI-CompilerGUIhas8pagesofcategoriesforcodegenerationtoolsControlsmanyaspectsofthebuildprocess,suchas:OptimizationlevelTargetdeviceCompiler/assembly/linkoptions第7页BuildOptionsGUI-LinkerGUIhas3categoriesforlinkingSpecifyvariouslinkoptions.\DebugmeansthedirectorycalledDebugonelevelbelowthe.pjtfiledirectory$(Proj_dir)\Debugisanequivalentexpression第8页DefaultBuildConfigurationsAdd/RemoveyourowncustombuildconfigurationsusingProjectConfigurationsEditaconfiguration:SetitactiveModifybuildoptionsSaveprojectFornewprojects,CCSautomaticallycreatestwobuildconfigurations:Debug (unoptimized)Release (optimized)Usethedrop-downmenutoquicklyselectthebuildconfiguration第9页LearningObjectivesUseCodeComposerStudioto:CreateaProjectSetBuildOptionsCreateauserlinkercommandfilewhich:Describesasystem’savailablememoryIndicateswheresectionswillbeplacedinmemory第10页SectionsAllcodeconsistsofdifferentpartscalledsectionsAlldefaultsectionnamesbeginwith“.”Thecompilerhasdefaultsectionnamesforinitializedanduninitializedsectionsint x=2;int y=7;voidmain(void){longz;z=x+y;}Globalvars(.ebss)Initvalues(.cinit)Localvars(.stack)Code(.text)第11页CompilerSectionNamesName Description LinkLocation.text code FLASH.cinit initializationvaluesfor FLASH globalandstaticvariables.econst constants(e.g.constintk=3;) FLASH.switch tablesforswitchstatements FLASH.pinit tablesforglobalconstructors(C++)FLASHInitializedSectionsName Description LinkLocation.ebssglobalandstaticvariables RAM.stackstackspace low64KwRAM.esysmemmemoryforfarmallocfunctions RAMUninitializedSectionsNote: DuringdevelopmentinitializedsectionscouldbelinkedtoRAMsince theemulatorcanbeusedtoloadtheRAM第12页PlacingSectionsinMemory.ebss.cinit.textMemoryM0SARAM(0x400)0x0000000x3000000x000400M1SARAM(0x400)FLASH(0x40000)Sections.stack第13页LinkingLinkerLink.cmd.map.obj.out

Memorydescription

Howtoplaces/wintoh/w第14页LinkerCommandFileMEMORY{PAGE0:/*ProgramMemory*/FLASH:origin=0x300000,length=0x40000PAGE1:/*DataMemory*/M0SARAM:origin=0x000000,length=0x400M1SARAM:origin=0x000400,length=0x400}第15页LinkerCommandFileMEMORY{PAGE0:/*ProgramMemory*/FLASH:origin=0x300000,length=0x40000PAGE1:/*DataMemory*/M0SARAM:origin=0x000000,length=0x400M1SARAM:origin=0x000400,length=0x400}SECTIONS{.text:>FLASHPAGE=0.ebss:>M0SARAMPAGE=1.cinit:>FLASHPAGE=0 .stack:> M1SARAM PAGE=1}第16页Exercise2GenericF28xdeviceM0SARAM(0x400)M1SARAM(0x400)L0SARAM(0x1000)L1SARAM(0x1000)0x0000000x0004000x0080000x009000FLASH(0x40000)0x300000Createthelinkercommandfileforthegivenmemorymapbyfillingintheblanksonthefollowingslide第17页MEMORY{PAGE__:/*ProgramMemory*/_____:origin=____

___,length=___

_________:/*DataMemory*/_______:origin=__

____,length=____________:origin=____

___,length=____________:origin=___

____,length=__

__________:origin=___

____,length=_

____}SECTIONS{.text:>FLASHPAGE=0.ebss:>M0SARAMPAGE=1.cinit:>FLASHPAGE=0.stack:>M1SARAMPAGE=1}Exercise2-CommandFile第18页MEMORY{PAGE0:/*ProgramMemory*/

FLASH:origin=0x300000,length=0x40000

PAGE1:/*DataMemory*/

M0SARAM:origin=0x000000,length=0x400

M1SARAM:origin=0x000400,length=0x400

L0SARAM:origin=0x008000,length=0x1000

L1SARAM:origin=0x009000,length=0x1000}SECTIONS{.text:>FLASHPAGE=0.ebss:>M0SARAMPAGE=1.cinit:>FLASHPAGE=0.stack:>M1SARAMPAGE=1}Exercise2-Solution第19页LinkerCommandFileSummaryMemoryMapDescriptionNameLocationSizeSectionsDescriptionDirectssoftwaresectionsintonamedmemoryregionsAllowsper-filediscriminationAllowsseparateload/runlocations第20页Lab2:LinkerCommandFileSystemDescription:

TMS320F28335AllinternalRAMblocksallocatedPlacementofSections:

.textintoRAMBlockL0123SARAMonPAGE0(programmemory).cinitintoRAMBlockL0123SARAMonPAGE0(programmemory).ebssintoRAMBlockL4SARAMonPAGE1(datamemory).stackintoRAMBlockM1SARAMonPAGE1(datamemory)F28335Memoryon-chipmemory0x008000L0SARAM(0x1000)0x000400M1SARAM(0x400)0x00C000L4SARAM(0x1000)0x00B000L3SARAM(0x1000)0x000000M0SARAM(0x400)0x009000L1SARAM(0x1000)0x00A000L2SARAM(0x1000)0x00D000L5SARAM(0x1000)0x00E000L6SARAM(0x1000)0x00F000L7SARAM(0x1000)第21页Lab2:Solution