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基于ARM9的Linux嵌入式系统移植与驱动开发.docx

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IIAbstractWiththedevelopmentoftheinformationtechnology,embeddedsystemshasbeenbroadlyappliedineachfieldoffamlilyandindustry.Andtheincreasinglywiderangeofapplications,thecomplexityofembeddedsystemsisconstantlyincreasing.Now,theembeddedoperatingsystemhasbecomeoneofthemostimportantpartoftheembeddedsystem.Intheembeddedoperatingsystems,TheLinuxoperatingsystemhasbecomemoreandmoreattened，becauseofitsopensource,smallcore,goodperformance;what’smore,Linux2.6introducesmanynewfeaturesthatmakeitanexcellentandsuitableoperatingsystemforembeddedcomputing.Undoubtedly,theembeddedLinuxoperatingsystemwillbringlargeeconomicvalueandapplicationprospects.ThisthesisisaccomplishedbasedontheautomaticmeterreadingsystemforapowercompanyinNanjing,andthemaincontributionistointroducetransplantationoftheembeddedLinuxsystem,aswellasthedriverdevelopmentofcorrespondingperipheraldevice.ThispaperaccomplishthetransplantationoftheembeddedLinuxsystembasedonAT91SAM9260EK,andincludingbuildthedevelopmentplatform,buildtheembeddedcross-compileenvironment;Basedontheanalysisofthebootingandloadingprocess—BootLoaderoftheembeddedsystem,implementsthetransplantationofUbootontheplatform.AfterthedetailedanalysisofthekernelstructureandbootingprocessofLinuxsystem,accordingtotheterminalhardwareplatform,analyzetheprocessoftransplantationandcutoftheLinuxkernel.Inaccordancewiththeapplicationrequirements,weselecttheYAFFS2asourrootfilesyetem,anddetailedlyintroducetheprocessoftheimplementationoftheYAFFS2filesystem.Finally,developthedriversoftherelatedequipment,especiallytheLCD(UC1698U),improvetheorigina