基于直接中断触发的OMAP-L138双核通信设计-豆柴文库

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基于直接中断触发的OMAP-L138双核通信设计
Introduction
Withthegrowingtrendofconnectingdifferentdevicesandsystemsinthemodernworld,communicationbetweensystemswithdifferentarchitectureshasbecomeanessentialprerequisite.TheOMAP-L138double-coreprocessorprovidesdigitalsignalprocessingaswellasanARMCortex-A8coretoaddressthischallenge,makingitanexcellentchoiceforembeddedsystems.
Communicationbetweenthetwocoresofthisprocessorisessential,anditsdesignmustprovidehighreliability,lowlatency,andlowcost.Onewaytoguaranteethisisthroughdirectinterrupttriggering,whichefficientlymanagesthetransferofdatabetweenthecoreswithouttheneedforadditionalhardwarecomplexity.Thispaperaddressesthedesignofacommunicationsystemthatutilizesdirectinterrupttriggeringandprovidesadetailedexplanationofthevariousfactorsthatcontributetotheoverallreliability,latency,andcostofthesystem.
OMAP-L138Double-CoreProcessorCharacteristics
TheOMAP-L138doublescoreprocessorconsistsofanARMCortex-A8andaC674xDigitalSignalProcessor(DSP)core.Theprocessorsupportsawiderangeofcommunicationprotocols,includingEthernet,CAN,andSPI.TheARMcoreisresponsibleforapplication-relatedtaskswhiletheDSPcorehandlesreal-timeprocessingtasks.Bothcoresaccessthesamememoryspace,allowingbothtosharedataseamlessly.
DirectInterruptTriggering
Directinterrupttriggeringinvolvestheuseofinterruptstoallowdatatransferbetweendifferentdevicesorinternalsubsystemsofadevice.Insteadofregularpolling,thesystemissetuptosendaninterruptsignalwhenaparticulareventhasoccurred.Theinterruptsignalactivatesapredefinedroutineorinterruptserviceroutine(ISR)thatisinchargeofprocessingtheevent.Whentheprocessingiscomplete,theISRsendsasignaltothesystem,indicatingthattheeventiscomplete.
BenefitsofDirectInterruptTriggering
Oneofthemanybenefitsofdirectinterrupttriggeringisitslowlatency.Theprocessorreactsimmediatelytotheinterruptsignal,whichtriggersimmediateactiononthedatatransfer.Thisensuresthatdataistransferredquicklyandwithoutdelay,whichisessentialinreal-timesystems.Furthermore,thisapproachreducestheloadonthem