一种基于ARM7的汽车网关方案

221Vol.22No.120093JOURNALOFNINGBOUNIVERSITY(NSEE)Mar.2009:1001-5132200901-0070-04ARM7,*,315211:CAN/LIN,2——.,ARM7,.:CANCANLIN,.:CAN;LIN;;ARM7:TP337:A,,,,,,.,[1].,,(ControllerAreaNetwork,CAN)(LocalInterconnectNet-work,LIN).CAN1Mbps,,,.LINCAN,20kbps,112V,.1CAN/LIN,,,3[2].,500kbpsCAN;2008-07-03.::.E-mail:[e-mail]*1950,,,,:.E-mail:[e-mail]1CAN/LIN1,:ARM771125kbpsCAN;20kbpsLIN.,CAN/LIN1.1,.CAN,,,.ARM7.,,.CAN/LIN2.2CAN/LIN23,CANCANLIN..[3]:.ECU,,,,DMA.ARM7S3C44B0X(CPU).PLL,66MHz,32,256MB,[4].,2CAN2CAN1LIN.3SJA1000CAN,CAN2.0A/B,CAN.3CTM1050CAN,CANCAN,(26N1371CANTJA1050),.,LINTJA1020,LIN2.0,LIN.,9LED:6CANCANLIN,3.2.1CAN2.1.1CANSJA1000CPU2.(1).SJA1000,CPU3722009.(2).SJA10005V,CPU3.3V.CAN.:1“”1“”,,1ALE,SJA1000,SJA1000.,ARM2,SJA1000.:3.3VCMOS74HC245CPUSJA100.5VSJA10003.3VCMOS;,SJA1000+5VTTL74HC245CPU,.,74HC245,ABBA3.CPU,SJA1000,74HC245.,I/OGPA2DIR,GPA174HC245OE.74HC245,CPUSJA1000.,CTM1050CAN,SJA1000.2.1.2CANCANCAN,SJA1000,,.2.2LINLIN,,,.TJA10203.3V/5.0VCPU,RxDTxDCPU0,SLPGPA3.,LIN,CPUINH,WAKEINH,TxD.TJA1020,CPUSLPTxD()TJA1020().3,,,[5].,,FIFORAM.:CANCANLIN.,CAN.3.1CAN,CAN,CANLIN.CANCAN;CANCANLIN;LINCAN.,FIFO,1,,CPU.4.3.2CAN,.,;,.,,,,,,1,:ARM773,.4,13CAN3CAN1LIN2LIN.,,CANCANLIN.,.:[1],,.CAN[M].:,2005.[2].[M].:,2005.[3]RoucheD.(VAN/CAN/LIN)[M].,.:,2006.[4].AT89C51CC01CAN/LIN[J].,2006(6):72-74.[5]TongWM,GaoHW,ZhangDZ,etal.ResearchonCAN/LINelectricalsystemnetworkoflatemodeltruck[J].JournalofElectronDevices,2006,29:802-807.AnARM7-basedSchemeforVehicleGatewayLIUXiao-yan,ZHUShuang-dong*(FacultyofInformationScienceandTechnology,NingboUniversity,Ningbo315211,China)Abstract:BasedonthoroughstudyofthenetworkingprincipleofbothCANandLINbus,thedifficultandcriticalissuesregardingthebusinterfacefortwovehicles,thatis,vehiclegateway,areanalyzedinthispaper.Totacklethedrawbacksidentifiedinthecurrentseveral-gatewayscheme,typicallythelowintegrationlevelresultingfromtheuseofmulti-independentgateways,thispaperproposesanewintegratinggatewayschemebasedonARM7,andpresentsitsefficientimplementationbybothsoftwareandhardwaremeans.ExperimentalresultsindicatethattheinterconnectionamonghighspeedCANbus,lowspeedCANbusandLINbuscanbesuccessfullyaccomplishedusingtheproposedschemewithsufficientlyhighstabilityandintegrationlevel.Keywords:CANbus;LINbus;gateway;ARM7CLCnumber:TP337Documentcode:A4