EDA外文翻译.docx
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EDA外文翻译
ElectronicDesignAutomation
EDA(ElectronicDesignAutomation,ElectronicDesignAutomation)technologyisthemodernfieldofelectricalengineeringanewtechnology,whichprovidescomputer-basedinformationtechnologyandcircuitdesignmethods.EDAtechnologydevelopmentandapplicationofgreatlypromotedthedevelopmentoftheelectronicsindustry.WiththedevelopmentofEDAtechnology,hardwaredesignofelectroniccircuitscanrelyonalmostallcomputerstoaccomplish,thusgreatlyshorteningthecycleofhardwareelectroniccircuitdesign,enablingmanufacturerstoquicklydevelopavarietyofsmallquantitiesofproductstomeetthemarketdemand.EDAtechnology,thebasicideaisthehelpofcomputers,theEDAsoftwareplatformtocompleteelectroniccircuitdesign,simulationandPCBdesignoftheentireprocess.Formorecomplexcircuits,ifnecessary,canbeusedtoimplementprogrammablelogicdevices.EDAtechnologynotonlyontheElectronicCourseandanalysisofsimulationexperimentstoaddressthevarietyoflaboratorycomponents,specificationsandquantityrestrictionsarenotsufficienttoavoiddamagetothestudentsinthelabcomponentsanddevicestostimulateinterestinlearning,todeveloptheiranalysis,electronicproductdesignanddevelopmentability,butalsoe-workerstodesign,developapowerfultoolforelectronicproducts.ThinkingofEDAtechnologyeducationandindustrypromotionisatechnologyhotspotintoday'sworld,EDAtechnologyisindispensableinthemodernelectronicsindustrytoatechnology.EDAtechnologyhasabroadmeaning,butalsoaprogressivedevelopmentofthefieldhasastrongvitality.Today'sEDAtechnologyhasreacheda"systemonachip"(SOC,SystemOnChip)stage.DeveloperscanusethepowerfulEDAdesignsoftware,theuseofIP(IntellectualProperty)IPcore,coupledwithhisinnovativethinking,andbuildtheirowncustomchips,whichhavetheirownIPrightstodesignspecificintegratedcircuit(ASIC,ApplicationSpecificIC.)EDAtechnologyinthepopularityofteaching,practicalapplicationsbasedonprogrammabledevicetechnology,whichincludesfourbasicconditions:
①large-scaleprogrammabledevices,itistheuseofEDAtechniquescarrierelectronicsystemdesign;
②hardwaredescriptionlanguageItistheuseofEDAtechnologiesforelectronicsystemdesign,themainmeansofexpression;
③softwaredevelopmenttools,itistheuseofEDAtechnologiesforintelligentelectronicsystemdesignautomationdesigntools.
④experimentaldevelopmentsystem,whichistheuseofEDAtechnologyforelectronicsystemsDownloadtoolsandhardwaredesignverificationtools.
ProgrammableLogicControl(CPLD/FPGA)
Inourdesign,wewasselectedCPLD/FPGA,ascomparedwiththetraditionalMCUhasmanyadvantages,mainlyinthefollowingareas:
①advancedprogrammingveryeasy.CPLD/FPGAproducts,partofthedaisychainin-systemprogrammingmode.Thisadvancedmethodofprogramminghasbecometheworld'sdevelopmenttrendofvarioustypesofprogrammabledevices.Becauseitobviatestheexpensiveandinconvenientoperationdedicatedprogrammer,justneedtodownloadaverysimpleprogrammingcircuitandaPC,printercommunicationcableontheline.Itisnotprogrammedpressure,theTTLlevellinecanbeprogrammedatanytime,andtheso-calledmulti-chipdaisychainserialprogramming.Itsprogrammingupto1milliontimes,suchasLattice'sislesandAMD'sMACHfamily.Inaddition,programmingcaneasilyachieveinfrared,ultrasonicorradioprogrammingprogrammer,orthroughthetelephonelineremoteonlineprogramming.Thesefeaturesareincommunicationdevicesandmilitaryspecialpurposedevices.
②highspeed.CPLD/FPGAclockdelayofuptonslevel,combinedwiththeparallelwork,intheultrahigh-speedreal-timemonitoringandcontrolapplicationsandhasaverybroadapplicationprospects.IfyouusetheFLEX10K50ALTERAdevelopmentnetworkimagethroughUSBinterface,real-timeencryption/decryptionASICsystem,carriedoutinFLEX10K50upto56-bitparallelbinaryarithmetic,eachencryption/decryptioncycleofonlyafewμs,andtheMCUtakesnearly1minute.AnotherexampleisinthemoldmanufacturingEDMprocessing,motorcontrol,theeffectiveoperationoftheprocessingpartsfromonlyafewμs,whichisrequiredforthecontrolofsensitiveandhigh-speedcircuitfeedingservice,notashortcircuitorarcingislessthanthebreakdown.Obviously,thiswork,MCUisdifficulttodirectlyparticipate.IfdirectfeedingbyispLSI1032servicecontrol,feedingontheclosed-loopmotorspeedservice,theuseofsamplingispLSIdirectcontroloftheAD1674,8-bitaccuracyusingamaximumspeedof8μs/each,inordertoachieveagoodclosed-loopspeedcontrolofsynchronousand.
③highreliability.Inhighreliabilityapplications,MCU'sshortcomingsasaCPLD/FPGAapplicationleftalotofuseless.AlthoughthefunctionofthisgroupdevelopedthedeviceisachievedthroughtheEDAsoftware.Butthephysicalmechanismlikea74LS164aspurelyahardwarecircuitisveryreliable.Throughtherationaldesignofmostapplications,noneedtoconsiderthecomplexresetandinitialization.Designusingasimplestatementjustidleinitialentryintothesame,wecaneffectivelypreventanypossible"death"phenomenon.Becauseitisworkinginparallel,itcanbeusedaseitherinputpininterruptmonitoringissimilartopinMCU,andthereactionrateisonlysatisfiedwonderfulclass.CPLD/FPGA,highreliabilityisalsoreflectedinalmosttheentiresystemcanbedownloadedonthesamechip,thusgreatlyreducingthevolume,easytomanageandshielding.
④powerful,applicationsarebroad.Currently,CPLD/FPGAtoselectalargerange,accordingtodifferentapplicationsusedifferentcapacitychips,suchasLattice'sispLSIandAMD'sMACH,thesmallestchipforthe1000equivalentlogicgates,thelargestofseveralonehundredthousand.ALTERAandXILINXgateintroducedmillionsofCPLD/FPGAcanachievealmostanyformofdigitalcircuitsordigitalsystemsdesign.Withthewideapplicationofsuchdevicesandthecostdroppedsignificantly,andthemarketrateincrease,CPLD/FPGAinthesystemrateisalmostequaltothedirectapplicationofASICdevelopment.
⑤easytouse,developconvenient.ThedesignofSCMexpertsinapplicationsystemisverysimple.However,forbeginners,suchastheCPU'swork,manyoftheusageofspecialregisters,interruptconcepts,etc.,reallyisnotaneasytask.Incontrast,CPLD/FPGAapplicationdoesnotrequiretoomuchpreparationtolearntheknowledge,aslongasalittlebitofdesignofdigitalcircuitsandcomputersoftwarebasics,youcanintheshorttermtohandlebasicdesignanddevelopmentskills.Andinturn,tolearntouseSCM,itappearedhundredsoftimesmore.Thisisundoubtedlyhighforustoprovideashortcuttolearning,standingontheshouldersofgiants,ofcoursefastertobesuccessful.Itcanbepredicted,thestudyofEDAtechnologyboomandtheCPLD/FPGAapplicationboomneverinferiortoboomoverthepast10years,singlechip.
⑥shortdevelopmentcycle.EDAsoftwarefeaturesasthecorrespondingsoundandpowerful,convenientandreal-timesimulationcapabilities,andintuitiveimageofthedevelopmentprocess,andthehardwarefactorsinvolvedverylittle,itcanbeverycomplicatedinaveryshorttimethesystemdesign,whichistheproducttomarketquicklythemostvaluablefeatures.SomeEDAexpertspredict,thefutureoflarge-scalesystemsofCPLD/FPGAdesignisjustallkindsoflogicandthenapplytheIPcore(CORE)oftheassembly,thedesigncycle,onlyhour.TIcompanythateightypercentofanASICIPcorefeaturesavailablesuchasready-madelogicsynthesis.
1.DevelopmentoflanguageVHDL
VHDL(VeryHighSpeedIntegratedCircuitHardwareDescriptionLanguage)isaveryhighspeedintegratedcircuithardwaredescriptionlanguage,itcandescribethefunctionofthehardwarecircuitry,signalconnectivityandthetimebetweenlanguages.Itcanbemoreeffectivethanthecircuitdiagramtoexpressthecharacteristicsofthehardwarecircuit.UsingtheVHDLlanguage,youcanproceedtothegeneralrequirementsofthesystem,sincethedetailedcontentwillbedesignedtocomedowntoearth,andfinallytocompletetheoveralldesignofthesystemhardware.IEEEVHDLlanguagehasbeentheindustrystandardasadesigntofacilitatereuseandsharingtheresults.Atpresent,itcannotbeappliedanalogcircuitdesign,buthasbeenputintoresearch.VHDLprogramstructure,including:
entity(Entity),structure(Architecture),configure(Configuration),PackageCollection(Package)andtheLibrary(Library).Amongthem,theentityisthebasicunitofaVHDLprogram,byentityandthestructureoftwoparts:
thephysicaldesignsystemthatisusedtodescribetheexternalinterfacesignal;structureusedtodescribethebehaviorofthesystem,thesystemprocessesorsystemdatastructureform.Configurationselecttherequiredlanguagefromthelibrarysystemdesignunittoformdifferentversionsofdifferentspecifications,sothatthefunctionisdesignedtochangethesystem.Collectionofrecordsofthedesignmodulepackagetosharethedatatypes,constants,subroutinesandsoon.Databaseusedtostorethecompiledentities,thebodystructure,includingthecollectionandconfiguration:
oneisthedevelopmentofengineeringsoftwareuser,theotheristhemanufacturer'sdatabase.
VHDL,themainfeaturesare:
①powerful,highflexibility:
VHDLlanguageisapowerfullanguagestructure,clearandconcisecodecanbeusedtodesigncomplexcontrollogic.VHDLlanguagealsosupportshierarchicaldesign,supportdesigndatabasesandbuildreusablecomponents.