J1939isaseriesofSAErecommendedpracticesthat
havebeendevelopedtoprovideastandard
architecturebywhichmultipleelectronicsystemsona
vehiclecancommunicate.Itwasdevelopedbythe
TruckandBusControlandCommunicationsNetwork
SubcommitteeoftheTruckandBusElectricaland
ElectronicsCommittee,butitsuseisnotlimitedtotruck
andbusapplications.J1939hasbeenimplementedin
abroadrangeofvehiclesandtransportationsystems.
J1939providesacommunicationprotocoloveraCAN
network.TheCANnetworkiscomprisedoftwoormore
interconnectedElectronicControlUnits(ECUs).Asper
theSAEJ1939-11specification.theECUsare
connectedusinglinearshieldedtwistedpairwiring,
withadatarateof250Kbits/second.AN930J1939CLibraryforCAN-EnabledPICmicroMicrocontrollersAuthor:KimOttenMicrochip’sCAN-enabledPICmicrodevicesprovideaKimOttenSoftwareConsultingpowerful,flexibleandlow-costmeansofimplementingtheJ1939protocolonawidevarietyofelectronicCo-Author:CaioGübelvehiclecomponents.TheJ1939ClibraryhandlestheMicrochipTechnologyInc.majorityofnetworkmanagementaspectsofJ1939,allowingtheusertocon
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