IntroductiontoKeil-MDK-ARMUpdated:Thursday,February15,2018

Outline

• WhatareARMtools• WhatisKeil• WhatareKeil Components• InstallingKeil Lite• CreateanewprojectusingKeil• Steppingthroughasimpleassemblyprogram• Understandinganassemblyprogram

WhatisKeil MDK-ARM?

• Keil isaCortex-MDevelopmentplatform• Therearemanyotherplatforms

• MDK-ARMstandsforMicrocontrollerDevelopmentKitforARM• Keil’s latestversionis5:www2.keil.com/mdk5(watchthevideo)• TherearemanycomponentstoKeil MDK-ARM• uVision IntegratedDevelopmentEnvironment(IDE)• Compilationtools(C/C++)• Assembler• Linkunities(usedtoprogramthephysicaldevice)• Simulator(whennohardwareisavailable)• Etc.

AsidefromKeil therearemanyotheropensourceandcommercialtools:https://en.wikipedia.org/wiki/List_of_ARM_Cortex-M_development_tools

WhatisKeil MDK-ARM?

Keil MDK-ARMEditionsSeehttp://www.keil.com/mdk5/selector

• MDK-ProfessionalcontainsallfeaturesofMDK-Plus.Inaddition,itsupportsIPv4/IPv6dual-stacknetworking,IoT connectivity,andaUSBHoststack.Onceavailable,MDK-ProfessionalincludesARMv8-MarchitecturesupportandalicenseforDS-MDK.• MDK-PluscontainsmiddlewarelibrariesforIPv4networking,USBDevice,FileSystem,andGraphics.ItsupportsARMCortex-M,selectedARMCortex-R,ARM7,andARM9processorbasedmicrocontrollers.• MDK-Cortex-MsupportsCortex-Mprocessor-basedmicrocontrollers.• MDK-Lite iscodesizerestrictedto32KByte andintendedforproductevaluation,smallprojects,andtheeducationalmarket.

CompilationFlowinKeil

CortexMicrocontrollerSoftwareInterfaceStandard(CMSIS)• CMSISprovidestheinterfacebetweenthemicrocontrollerperipheralsandtheMDKMiddleware• ForourprojectsweneedtohaveCMSISCOREandDEVICESStartupfilesaddedtoourcode

InstallingKeil-1

• visitwww2.keil.com/mdk5/• DownloadMDK-Lite• Afterthedownloadhasfinished,doubleclickthe .exetoinstalltheprogram.• Once installed,clickfinish• Thepackinstallerwillload,andittakessometimeforittofindallthenewpackagesavailableforinstall.• Allowthepackinstallertofinishsearching(shownbytheactionbaratthebottomofthescreen)

visitwww2.keil.com/mdk5/

InstallingKeil - 2

• OntheleftsideofthewindowunderDevices,clicktoexpandSTMicroelectronics.

• Find STM32F4Seriesandexpandit

• DoubleclickonSTM32F401REanditshouldaddittothepackslistontherightside.

• ClickallthebuttonsthatsayInstallorUpdatetogetallthefeatures/packagesthatKeil offers.

StartANewProject• OpenKeil uVision 5fromyourWindows• Makesureallprojectsareclosed:

• Projectà CloseProject

• ClickonProjectà newuVision Project…• InthewindowclickonNewFolder[1]• Typethenameoftheproject:ASM_NewProject [2]• Gotothenewfolderthatyoujustcreated[3]

[1]

[2]

[3]

StartANewProject-2• TheSelectDevicewindowpopsup• Inthesearchtype:STM32F401RETx• Clickonthedevice(STM32F401RETx)thatshowedupandthenclickOK

StartANewProject-3• AtthispointtheManageRunwindowpopsup• CHECKCMSISà COREandDEVICEàSTARTUPboxes–notethatthecolorchanges• ThenclickOK

IfDevicesAreMarkedasX

StartANewProject-4• AttispointyourProjectwindowshouldshowthe

CMSISandDEVICE– thesearetheCMSISsysteminitializationfilesandstartupfilesinorderfortheRUNTIMEtooperate [1]

• ClickontheOPTIONSFORTARGET[2]

• ClickonDEBUGtab[3]

• CHECKtheSIMULATOR[4]

• ClickonOK

• InthePROJECTwindowclickonSourceGroup1andselectADDNEWITEM….

• Inthenewwindowselect

[1]

[2][3][4]

StartANewProject-5• InthePROJECTwindowclickonSourceGroup1and

selectADDNEWITEM….

• InthenewwindowselectASMfiles

• ThentypethenameoftheASMfile:ASM_NewProject.s

• ClickonADD

StartANewProject-6• IntheprojectwindowclickonASM_NewProject.s

undertheSourceGroup1folder

• Openthefile

• Typeinthefollowingcode

• Savethefile

• PressF7andmakesuretherearenoerrors(asshownbelow)

• Clickonthedebugbutton– shownabove

• MakesuretherearenoerrorsandstepthroughthecodeasyouclickontheSTEPINbuttonshownabove

***UsingCompiler'V5.06update5(build528)',folder:'C:\Keil_v5\ARM\ARMCC\Bin'Build target'Target1'assemblingchange_register.s...linking...ProgramSize:Code=188RO-data=404RW-data=0ZI-data=1536".\Objects\NewProject.axf"- 0Error(s),0Warning(s).BuildTimeElapsed:00:00:00

StartANewProject-7• Setupyourprojectwindowsareshownbelow

• Todoso,clickonVIEWandselecttheappropriatewindow

FILESAssembly&Startup)

Disassembler

REGISTERS

PROJECT

MEMORYCOMMAND

Let’sExamineTheCode• Whatarethevaluesoftheregistersafteryoustepthroughtheentirecode?

• WhatisthevalueofP?

• Whathappensifwechange#PtoPandremove#?

• IntheDisassemblernotehowthecodesaredisplayed.Whatisthestartingmemorylocationfortheassemblycode?

• WhatistheOPCODEforMOVinstruction?

• WhatistheOPCODEforADDinstruction?

• Howlarge(intermsofbits)isregisterR0?

• Whatexactlythefollowingcommandachieves?ADDr2,r0,r1

Example1:Addition

DoThis:

• Trythefollowingandshowthevaluesoftheregistersaftertheprogramiscompleted:

MOVr1,#Q;loadQintor1MOVr2,#R;loadRintor2MOVr3,#S;loadSintor3ADDr0,r1,r2;AddQtoRADDr0,r0,r3;AddSto(Q+R)

References

• TheDefinitiveGuidetoARM®Cortex®-M3andCortex®-M4Processors– Chapter15

IfYouExperienceAnyIssues….

PotentialIssues

IfYouHavethiserror

IfYouGetCompilingIssue• AttispointyourProjectwindowshouldshowthe

CMSISandDEVICE– thesearetheCMSISsysteminitializationfilesandstartupfilesinorderfortheRUNTIMEtooperate [1]

• ClickontheOPTIONSFORTARGET[2]

• ClickonDEBUGtab[3]

• CHECKtheSIMULATOR[4]

• ClickonOK

• InthePROJECTwindowclickonSourceGroup1andselectADDNEWITEM….

• Inthenewwindowselect

[1]

[2][3][4]

IfDevicesAreMarkedasXRe-dothissection