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1、TheGeneralSituationofAT89C51Chapter1TheapplicationofAT89C51Microcontrollersareusedinamultitudeofcommercialapplicationssuchasmodems,motor-controlsystems,airconditionercontrolsystems,automotiveengineandamongothers.Thehighprocessingspeedandenhancedperipheralsetofthesemicroc
2、ontrollersmakethemsuitableforsuchhigh-speedevent-basedapplications.However,thesecriticalapplicationdomainsalsorequirethatthesemicrocontrollersarehighlyreliable.Thehighreliabilityandlowmarketriskscanbeensuredbyarobusttestingprocessandapropertoolsenvironmentforthevalidatio
3、nofthesemicrocontrollersbothatthecomponentandatthesystemlevel.IntelPlaformEngineeringdepartmentdevelopedanobject-orientedmulti-threadedtestenvironmentforthevalidationofitsAT89C51automotivemicrocontrollers.Thegoalsofthisenvironmentwasnotonlytoprovidearobusttestingenvironm
4、entfortheAT89C51automotivemicrocontrollers,buttodevelopanenvironmentwhichcanbeeasilyextendedandreusedforthevalidationofseveralotherfuturemicrocontrollers.TheenvironmentwasdevelopedinconjunctionwithMicrosoftFoundationClasses(AT89C51).Thepaperdescribesthedesignandmechanism
5、ofthistestenvironment,itsinteractionswithvarioushardware/softwareenvironmentalcomponents,andhowtouseAT89C51.1.1IntroductionThe8-bitAT89C51CHMOSmicrocontrollersaredesignedtohandlehigh-speedcalculationsandfastinput/outputoperations.MCS51microcontrollersaretypicallyusedforh
6、igh-speedeventcontrolsystems.Commercialapplicationsincludemodems,motor-controlsystems,printers,photocopiers,airconditionercontrolsystems,diskdrives,andmedicalinstruments.TheautomotiveindustryuseMCS51microcontrollersinengine-controlsystems,airbags,suspensionsystems,andant
7、ilockbrakingsystems(ABS).TheAT89C51isespeciallywellsuitedtoapplicationsthatbenefitfromitsprocessingspeedandenhancedon-chipperipheralfunctionsset,suchasautomotivepower-traincontrol,vehicledynamicsuspension,antilockbraking,andstabilitycontrolapplications.Becauseofthesecrit
8、icalapplications,themarketrequiresareliablecost-effectivecontrollerwithalowinterruptlatencyresponse,abi
