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2010243Vol.24No.32010(81)JOURNALOFTESTANDMEASUREMENTTECHNOLOGY(SumNo.81):1671-7449(2010)03-0205-06GPRS刘晓杰,宋希庚,薛冬新(,116024):GPRS,.,CAN,,,,.,CMOSLCD,.5:CMOSLCDGPRSCAN.Linux.:;S3C2440A;Linux;CMOS;GPRS:U463.85:Adoi:10.3969/j.issn.1671-7449.2010.03.004DesignofMulti-FunctionAutomobileGPRSTheft-AgainstandAlarmSystemLIUXiaojie,SONGXigeng,XUEDongxin(InstituteofInternalCombustionEngine,DalianUniversityofTechnology,Dalian116024,China)Abstract:Anewkindofautomobiletheft-againstandalarmsystembyusingmobilenetworkGPRSisintroduced.ThesystememploystheexistingalarmsystemtogetalarminformationbycommunicatingwithCANbus,whichnotonlymakesuseofresourceseffectivelybutalsoreducesthesystemcost.Andthesystemsendsautomobileimagetotheuserscellphonethroughthemobilewirelessnetwork,whichenlargesthenetworkcoveredareaandimprovesthereliability.Besides,thesystemcanalsoactasarearviewsystembyusingCMOScamera.Thesystemconsistsoffiveparts:S3C2440Acentral-controllermodule,CMOScameramodule,LCDdisplaymodule,GPRSmoduleandCANbusmodule.ThispapermainlyintroducesthesystemhardwareconfigurationandsoftwaredesignbasedonembeddedLinux.Keywords:automobiletheft-againstandalarm;S3C2440A;embeddedlinux;CMOScameramodule;GPRSmodule0,,:2009-11-04:(1982-),,,:(1946-),,,,CAD,.,4[1].,.,GPSGSM,,,.GPRS,,,GPRS,,CMOS.,CMOSLCD,,.1S3C2440Aarm-linux2.4.26.MCU(S3C2440A)CMOS,LCDGPRS.1GPRS.,,,.5:CMOSGPRSLCDCAN.,Linux(arm-linux2.4.26),Linux,.2GPRS2,.:.,CMOS,LCD,;,.,..,CAN.,CAN.,CMOS20620103,GPRS,LCD.,.,CAN,.2.1S3C2440AMCU,.,S3C2440AARM920T,400MHz,USBA/DGPIO,[2],.,S3C2440A,.:.12V/24V,42V[3].,.,,.5V,3.3V1.8V..,LM2576HV.LM25763A,(52kHz)(1.23V),207(81)GPRS(),.LM2576HV60V,3.3V,5V,12V,15VADJ().TPS73HD318PWP,5V3.3V1.8V,750mA.2.2CMOSS3C2440ACAMIP,7,:DMADMASFR.CAMIFITU-RBT.601/6568b,[4].USB,CMOS.CMOS,,.OV9650CMOS,12801024,130.CMOSSCCBS3C2440AI2C,[5].S3C2440A4.CMOSMODULES,Linux.CMOSCAMmodule.hCAMmodule.c,CAMinit()CAMstop().,CAMinit(),:OV9650;S3C2440A,,UPLL;Linux,.4OV9650Fig.4CircuitinterfaceofOV96505LCDFig.5CircuitInterfaceofLCD2.3LCDS3C2440ALCD.LCD,,LCDLCD.5.LCDLCD.LinuxLCD,LCD.LCD:20820103(FrameBuffer);;LCD..2.4GPRSGPRS,GPRSS3C2440A.,GPRS,.UART1.GPRS:UART1;GPRS;GPRS.,GPRSGPRSStart(),6.#includeUART1.h#includeUser.h#includeGPRS.hvoidGPRSStart(intuserTelnum){intnum=0;char*picpt=getpic();////TargetInit();GPRSModeInit();num=100*getTimer();////,swhile(1){ModenDia1Up(userTe1num,pitpt);////OSTimeDelay(num);////picpt=getPic();if(IfGetCommand())////break;}}6GPRSFig.6GPRSmainfunction2.5CANCAN.CANCAN,D2B(DomesticDigitalBus).CAN:MCU(S3C2440A)+CAN(SJA1000)+CAN(CTMModule).SJA1000CAN,,.SJA1000S3C2440A7.CAN:;SJA1000.SJA1000()().,SJA1000CMR;,,:initrcbuffer(),readrcbuffer()writercbuffer().SJA1000.SJA1000,209(81)GPRS()0x09SJA1000,0x08SJA1000.7SJA1000S3C2440Fig.7ConnectionCircuitbetweenSJA1000andS3C24403GPRSGPRS,.,.:[1].[J].,2009(21):290-291.ZhouEnde.Researchofchinaautomobiletheft-againstsystemindustrystechnicaldevelopment[J].ModernBusinessTradeIndustry,2009(21):290-291.(inChinese)[2]SumsungCo.Ltd.S3C2440AUser'sManualPreliminary[Z].Seoul,Korea:SUMSUNGCo.Ltd,2004.[3],.42V[J].,2001(6):24-28.LiangQihui,ZhongDongjie.Adoptionof42Velectricalsysteminautomobile[J].ShanghaiAuto,2001(6):24-28.(inChinese)[4],,,.ARMLinux[M].:,2008:28-29.[5]OmniVisionCo.Ltd.OV9650FSLUsersmanual[Z].SiliconValley,USA:OmniVisionCo.Ltd,2003.[6].ARM[M].:,2005.21020103