标签: c库

ARM嵌入式软件编程经验谈TECHNOLOGYIN-DEPTHARM嵌入式软件编程经验谈作者华清远见科技信息有限公司ARM系列处理器是RISC字的边界）即能正确读取。但是，如果该（ReducdedInstructionSet地址不是四的倍数，那么，一条LDR指2．编译器的缺省行为Computing）处理器。很多基于ARM的高令返回一个循环移位结果，而不是执行多数嵌入式应用程序最初都是在原效代码的程序设计策略都源于RISC处理真正的未对齐字载入。循环移位结果取型环境下开发的。无论什……

J1939isaseriesofSAErecommendedpracticesthathavebeendevelopedtoprovideastandardarchitecturebywhichmultipleelectronicsystemsonavehiclecancommunicate.ItwasdevelopedbytheTruckandBusControlandCommunicationsNetworkSubcommitteeoftheTruckandBusElectricalandElectronicsCommittee,butitsuseisnotlimitedtotruckandbusapplications.J1939hasbeenimplementedinabroadrangeofvehiclesandtransportationsystems.J1939providesacommunicationprotocoloveraCANnetwork.TheCANnetworkiscomprisedoftwoormoreinterconnectedElectronicControlUnits(ECUs).AspertheSAEJ1939-11specification.theECUsareconnectedusinglinearshieldedtwistedpairwiring,withadatarateof250Kbits/second.AN930J1939CLibraryforCAN-EnabledPICmicroMicrocontrollersAuthor:KimOttenMicrochip’sCAN-enabledPICmicrodevicesprovideaKimOttenSoftwareConsultingpowerful,flexibleandlow-costmeansofimplementingtheJ1939protocolonawidevarietyofelectronicCo-Author:CaioGübelvehiclecomponents.TheJ1939ClibraryhandlestheMicrochipTechnologyInc.majorityofnetworkmanagementaspectsofJ1939,allowingtheusertocon……