汽車音響中通信協(xié)議的設(shè)計(jì)和實(shí)現(xiàn).pdf

1、大連理工大學(xué)碩士學(xué)位論文汽車音響中通信協(xié)議的設(shè)計(jì)和實(shí)現(xiàn)姓名：汪鵬申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：軟件工程指導(dǎo)教師：吳國偉20050528汽車音響中通信協(xié)議的設(shè)計(jì)和實(shí)現(xiàn)DesignandImplementationofCommunicationProtocolinCarAudiomthehighclasscaraudioproducts，inaddhiontotheCOleunitsthemarcusuallysomeotherexternald

2、evices，whichperformsomeadditionalandvalueaddedftln曲ollsItisoneofthenuclcarycontentsofdesignforallcaraudiosys_temsandalsoanimportantpointofgrowthincommerc／alprofitsinthisfieldthatifthecaraudioproductshavetheseadditionalfu

3、nctionsaswellashowwellthesefunctionsamimplementedMoreoveraperfectlydesignedcommunicationprotocolisthebaseandfoundationtoachievethesetargetsThemaintasksofthispaperarcthedesignandimplementationoftheearaudiodevicecommunicat

4、ionprotocolCACNET田地paperfirstlyde∞蝴)esthe∞持wa艙compositionsandarchitectureoftheearaudiosystemmakingpreparationfordesignofthecommtmicationprotocol；thenitmakessomeanalysisonthedemandsofthecommunicationprotocol；intheendthere

5、comethedesignandimplementationofthecommunicationprotoc01hthestageofdcsigrl，onthebasisofreferencingthefr&meformatandcocfinalngmodeofs舡J1805communicationprotocolaframeformatdefinitionsuitableforthecaraudiodevicecommunicati

6、onisproposedaccordinalngtothefeatureandapplicationofc盯audiodevicesIntermsofconmnttheframecanbecategorizedinto3forms：CommandStatusandResponse，eachperformadistinctfunctionhtermsofimplementationthecommunicationprotocolcanbe

7、categorizedinto3layers：Layerl，Layer2andLayer3(theapplicationlayer)Layerlisthedrivelayerofthecommunicationprotocol，whichmainlyutilizestheonchipleSourcesGZMEP～DMAIrARTandⅡmoftheMCUtorealizethesending&receivingandcollisiond

8、etectionofthecommunicationdamThankstotheadoptionofsoRwarcfordamscnding&rccciviugofthedrivelayerandthedesignmethodofCDM魄，CDcollisiondetectionmechanisma讎ofhardwarecostsissavedwhichbringsmorecompetitivepowertothecaraudiopro

9、ducts11”mainfunctionsofLayer2arctomanagethecommunicationmodesperformtheini鋤izafionofCACNETnx西veandmanagetheframesendingrequestsfromLayer3(theapplicationlayer)andfeedtheframesendingoutcomebacktoLayer3(theapplicationlayer)

10、atthes鋤etimeLayer3isthevisualizedappficafiononthebasisoftheCAC金IETcommunicationprotoc01Inalllayersofthecommunicationprotocol，possibleCl“fOl苫inalleasesoccmringintheactualcommunicationhavebeenappropriatelylmdledwhichguaran