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1、外文翻译系别信息工程系专业测控技术与仪器班级B141401学号姓名指导教师负责教师沈阳航空航天大学北方科技学院2015年6月沈阳航空航天大学北方科技学院毕业设计（外文翻译）TheDesigningofSerialCommunicationBaseonRS232Abstract-ThisPaperdiscussedtheprincipleofserialcommunicationmainly,proposedthedesignmethodbasedonRS232,designedthehardcircuitofserialcommunicati
2、on,andrealizedtheprogrammingtoPCMicrocomputerandsinglechipmicrocomputerbyusingassemblylanguageandC++BuilderseparatelyKeywords-serialcommunication;singlechipmicrocomputer;programdesignI.INTRODUCTIONDuringworkinginthecontrolsystem,thePCmicrocomputersendsinstructionsforstep-by
3、-stepmotortocollecttheimageinformation.ThereforethecommunicationbetweenthePCmicrocomputerandthedrivingsystemisneededforthecommunicationsystem.Ingeneral,acompletecommunicationsystemconsistsoftransmitter,receiver,convertingthedatainterfaceandtransmittingdatachannel.Thecontrol
4、oftnestep-bystepmotorisrealizedthroughthepulsedistributionbysinglechipmicrocomputer.Onthemotorcontrolsystem,thePCmicrocomputeriscalledasuppercomputer,andthesinglechipmicrocomputerfordrivingstep_by_stepmotoriscalledaslowercomputer.Thecommunicationbetweentheuppercomputerandth
5、elowercomputerhastwomethods,thatsitosaytheparallelinterfacecantransmitmuchdataatthesametimeandhasthefastspeed,butwhenthetransmissiondistanceisfarandthenumberofdataismuch,itneedsmorethenumberoftransmissionlines.Inaddition,thevoltagelevelmaybe19沈阳航空航天大学北方科技学院毕业设计（外文翻译）changed
6、bythetransmissionlinefactorandelectromagneticinterference.Serialcommunicationisutilizedinthecontrolsystemsoastosimplifythehardwareandsavethecost..II.THEBRIEFDESCRIPTIONOFSERIALPORTCOMMUNITIONSerialcommunicationisthecommunicationbetweensenderandreceiverdataline,tomoveeachtim
7、eabit.Theadvantageisthatonlyapairoftransmissionlinestosendinformation,soitslowcost,suitableforlong-distancecommunication;itsdisadvantageisthattransmissionspeedislow.Serialcommunicationwithasynchronouscommunicationandsynchronouscommunicationaretwobasicmeansofcommunication.Sy
8、nchronouscommunicationforthecaseofhightransmissionspeed,thehardwarecomplexity.Thea
