quartus_ii_13.0_VHDL官方教程

《quartus_ii_13.0_VHDL官方教程》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。

1、Quartus®IIIntroductionforVHDLUsersThistutorialpresentsanintroductiontotheQuartus®IIsoftware.ItgivesageneraloverviewofatypicalCADflowfordesigningcircuitsthatareimplementedbyusingFPGAdevices,andshowshowthisflowisrealizedintheQuartus®IIsoftware.Thedesignprocessisillustratedbygivingstep-by-stepin

2、structionsforusingtheQuartus®IIsoftwaretoimplementasimplecircuitinanAltera®FPGAdevice.TheQuartus®IIsystemincludesfullsupportforallofthepopularmethodsofenteringadescriptionofthedesiredcircuitintoaCADsystem.ThistutorialmakesuseoftheVHDLdesignentrymethod,inwhichtheuserspecifiesthedesiredcircuit

3、intheVHDLhardwaredescriptionlanguage.AnotherversionofthistutorialisavailablethatusesVeriloghardwaredescriptionlanguage.ThescreencapturesinthetutorialwereobtainedusingQuartus®IIversion13.0;ifotherversionsofthesoft-wareareused,someoftheimagesmaybeslightlydifferent.Contents:GettingStartedStart

4、ingaNewProjectDesignEntryUsingVHDLCodeCompilingtheVHDLCodeUsingtheRTLViewerSpecifyingTimingConstraintsQuartus®IIWindowsComputerAidedDesign(CAD)softwaremakesiteasytoimplementadesiredlogiccircuitbyusingapro-grammablelogicdevice,suchasafield-programmablegatearray(FPGA)chip.AtypicalFPGACADflowisi

5、llustratedinFigure1.Figure1:TypicalCADflow.Itinvolvesthefollowingbasicsteps:•DesignEntry–thedesiredcircuitisspecifiedeitherbyusingahardwaredescriptionlanguage,suchasVerilogorVHDL,orbymeansofaschematicdiagram•Synthesis–theCADSynthesistoolsynthesizesthecircuitintoanetlistthatgivesthelogicelemen

6、ts(LEs)neededtorealizethecircuitandtheconnectionsbetweentheLEs•FunctionalSimulation–thesynthesizedcircuitistestedtoverifyitsfunctionalcorrectness;thesimulationdoesnottakeintoaccountanytimingissues•Fitting–theCADFittertooldeterminestheplacementoftheLEsdefinedinthenetlistintotheLEsinanactualFP

7、GAchip;italsochoosesroutingwiresinthechiptomaketherequiredconnectionsbetweenspecificLEs•TimingAnalysis–propagationdelaysalongthevariouspathsinthefittedcircuitareanalyzedtoprovideanindicationoftheexpectedperformanceofthecircuitALTERA®CORPORATION2OCTOBER2012