基于rs-232的串行通信设计-外文翻译

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1、TheDesigningofSerialCommunicationBasedonRS232AbstractThispaperdiscussedtheprincipleofserialcommunicationmainly,proposedthedesignmethodbasedonRS232,designedthehardcircuitofserialcommunication，andrealizedtheprogrammingtoPCMicrocomputerandsinglechipmicro

2、computerbyusingassemblylanguageandC++Builderseparately.Keywords：serialcommunication;singlechipmicrocomputer;programdesign.I.INTRODUCTIONDuringworkinginthecontrolsystem,thePCmicrocomputersendsinstructionsforstep-by-stepmotortocollecttheimageinformation

3、.ThereforethecommunicationbetweenthePCmicrocomputerandthedrivingsystemisneededforthecommunicationsystem.Ingeneral，acompletecommunicationsystemconsistsoftransmitter，receiver,convertingthedatainterfaceandtransmittingdatachannel.Thecontrolofthestep-by-st

4、epmotorisrealizedthroughthepulsedistributionbysinglechipmicrocomputer.Onthemotorcontrolsystem,thePCmicrocomputeriscalledasuppercomputer，andthesinglechipmicrocomputerfordrivingstep-by-stepmotoriscalledaslowercomputer.Thecommunicationbetweentheuppercomp

5、uterandthelowercomputerhastwomethods，thatistosaytheparallelcommunicationandserialcommunication.Parallelinterfacecantransmitmuchdataatthesametimeandhasthefastspeed,butwhenthetransmissiondistanceisfarandthenumberofdataismuch,itneedsmorethenumberoftransm

6、issionlines.Inaddition，thevoltagelevelmaybechangedbythetransmissionlinefactorandelectromagneticinterference.Serialcommunicationisaonewaythatthedataistransmittedbyabitinorder,inwhichtwotransitionlinesisneededtorealizebidirectionalcommunication.Itistake

7、nintoconsiderationthatthedataismuchandthetransmutationnumberislittle，theserialcommunicationisutilizedinthecontrolsystemsoastosimplifythehardwareandsavethecost.Serialcommunicationisoneoftheoldestmechanismsfordevicestocommunicatewitheachother.Startingwi

8、ththeIBMPCandcompatiblecomputers，almostallcomputersareequippedwithoneormoreserialportsandoneparallelport.Asthenameimplies，aserialportsendsandreceivesdataserially,onebitatatime.Incontrast,aparallelportsendsandTheDesigningofSerialCommunicationBa