Practical 1Introduction to lab hardwaresoftware.docx

Practical 1Introduction to lab hardwaresoftware.docx

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Practical1Introductiontolabhardwaresoftware

Practical1:

IntroductiontoLabHardwareandSoftware

Introduction

ThisPracticalconsistsofanintroductiontocreatingsimplecircuitsonanFPGAusingVHDLandXilinxISE.FirstlyyouwillcreateanewprojectusingthewizardofXilinxISE.ThisPracticalconsistsofseveralstepsbrokendownoverthisdocument.

InthisPracticalexercise,wewillfirstlearnhowtocreateasimpleVHDLprojectofa2-to-1multiplexer（MUX）usingXilinxISE.Afterthedesignisfullyverified,wewilluseXilinxISEtosynthesizethedesignintoaSpartan3FPGAconfigurationdatafilewhichwillthenbedownloadedontoaSpartan3printedcircuitboard（PCB）wheretheimplementeddesignwillbeverified.YouwillsecondlylearnhowtodesignandimplementafewbasiclogicfunctionssoastobefamiliarwiththeXilinxISEdesigntoolandbasicVHDL.

Task1:

2-to-1multiplexer

The2-to-1multiplexerhasthreeinputs（twodatainputsandoneselectinput）andonedataoutputasbelow:

∙DataInputs:

Din0,Din1

∙SelectInput:

Sel

∙DataOutput:

Dout

ItsLogicFunctionis:

whenSel=0,Dout=Din0;whenSel=1,Dout=Din1.ItsBooleanLogicEquationis:

Dout=Din0*Sel+Din1*/Sel.Followthenextstepstocreate,designandimplementtheabove2-to-1multiplexer.

DesignSteps

Step1:

CreateanewprojectusingISE:

Clickthestartmenu,andtypeinProject.Thenlookfor"64-bitProjectNavigator"andclickonit.YoumayuseotherwayslaunchXilinxISE.

AfterISEislaunched,wewillcreateanewprojectinFile->NewProject…

Createanewprojectunderthedirectory“C:

\Tem"oranotherdirectoryofyourchoice,andgivetheprojectadescriptivenamesuchas\Lab0VHDL".Westronglyreckonyousaveallyourprojects.Alsosetthe“Top-levelsourcetype:

"to“HDL".Click“Next".

TheSpartan3StarterKitPCBboardusesaXilinxSpartan3XC3S200FPGAchipwhichispackagedinaflatthin256-pin（FT256）BallGridArray,somakethefollowingchanges.Click“Next"whenyouaredone.

Thenextpagedisplaysasummaryofthenewproject.Click“Finish"whenyou'redonetoexit.

Step2:

CreatecircuitusingVHDLfile

ClickonProject->NewSource...

SelectVHDLmoduleandgivethefileanameandclick“Next”.

Addtheportnamesanddirectionsasshown.

Click“Finish"toexitthewizard.

Addthefollowinglineofcode:

Dout<=（Din0andnotSel）or（Din1andSel）;

SavethefileandproceedtoSynthesize.

Selectthefiletobesynthesizedanddouble-clickon“Synthesize".Youcanalsoright-clickon“Synthesize"andselectRun.

Step3:

InputandOutputPinPlanning

Weneedaconstraintsfiletoensurethatinputsandoutputsgotothedesiredpins.

SelectProject->NewSource...

Click"ImplementationConstraintsFile"intheleftframeandtypeinthenamefortheconstraintsfile,forexample"mux21".Thenclick"Next"and"Finish".

Doubleclickonthe"I/OPinPlanning（PlanAhead）-Post-Synthesis"under"UnderConstraints"tolaunchPlanAhead.

Step4:

ImplementDesign

Doubleclickon“ImplementDesign”touseyourconstraint

Double-clickon“GenerateProgrammingFile"togenerateFPGAconfigurationdatafilesuchas“21MUX.bit”.

Step5:

ProgramFPGA

Connectthe5VDCpowercabletothepowerinputonthedemoboard（J4）.

ConnectthedownloadJTAG-USBcablebetweenthePCparallelportandthedemoboard（J7）.Carefullynotethepositionofthelabelonthecable.

Start“Adept”Software,whichcandownloadthebitfileontotheFPGAthroughJTAG-USBcable.

YoucaneitherchoosetoprogramFPGAforPROM.

VerifyyourimplementationandshowyourresulttotheTutorformarkingwhenyouareready.

Task2:

Implementthenextbasiclogicfunctionsfollowingthesamestepsabove.Youneedtodefineindependentprojectforeachofthefunctionsbelow:

∙ANDGate

∙ORGate

∙NANDGate

∙Exclusive-NORGate

Task3:

Implementthenext74XX30chip:

Task4:

UsetheK-MAPtosimplifytheBooleanfunctioninproductofsums,andimplementthesimplifiedlogic,andverifyitbycomparingwiththeTruthTable.

F（A,B,C,D）=