资源描述：
《SPACEWIRE RMAP IP CORE 》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。
1、SPACEWIRERMAPIPCORESession:SpaceWireComponentsLongPaperSteveParkes,ChrisMcClements,MartinDunstanUniversityofDundee,SchoolofComputing,Dundee,DD14HN,Scotland,UKWahidaGastiEuropeanSpaceAgency,Postbus299,NL-2200AGNoordwijk,TheNetherlandsE-mail:sparkes@comput
2、ing.dundee.ac.uk,cmcclements@computing.dundee.ac.uk,mdunstan@computing.dundee.ac.uk,wahida.gasti@esa.intABSTRACTTheSpaceWireRemoteMemoryAccessProtocol(RMAP)providesastandardmechanismforreadingfromandwritingtomemoryinaremoteSpaceWirenode.Thissimplebutpowe
3、rfulcapabilityisalreadybeingdesignedintocomponentsliketheSpW-10XrouterandmissionslikeBepiColomboandMMS.ThedevelopmentofagenericIPcoreimplementingtheRMAPprotocolwillenableuserstoreadilyimplementtheRMAPprotocolsinFPGAsorASICs,customisingittotheirspecificmi
4、ssionneeds.TheRMAPIPcoreisbeingdevelopedbyUniversityofDundeeforESA.ThispaperdescribesthemainfeaturesoftheRMAPIPcore,itsarchitecture,interfacesandinitialperformance.1INTRODUCTION1.1SPACEWIRESpaceWireisacommunicationsnetworkforuseonboardspacecraft.Itisdesi
5、gnedtoconnecthighdata-ratesensors,largesolid-statememories,processingunitsandthedownlinktelemetrysubsystemprovidinganintegratedonboard,data-handlingnetwork.SpaceWirelinksareserial,high-speed(2Mbits/secto200Mbits/secorhigher),bi-directional,full-duplex,po
6、int-to-pointdatalinkswhichconnecttogetherSpaceWireequipment.ApplicationinformationissentalongaSpaceWirelinkindiscretepackets.ControlandtimeinformationcanalsobesentalongSpaceWirelinks.SpaceWireisdefinedintheEuropeanCooperationforSpaceStandardizationECSS-E
7、50-12Astandard[1].Itisbeingusedonmanyspacemissions.1.2RMAPTheremotememoryaccessprotocol(RMAP)[2]providesameansforoneSpaceWirenodetowritetoandreadfrommemoryinsideanotherSpaceWirenode.TheaimofRMAPistostandardizethewayinwhichSpaceWireunitsareconfiguredandto
8、providealow-levelmechanismforthetransferofdatabetweentwoSpaceWirenodes.ForexampleRMAPmaybeusedtoconfigureacameraoramassmemorydevice.Thecameradevicemaythenwriteimagedatatoallocatedareasofmemoryinthemassmemory,orthemassmemor
