第1題WhichofthefollowingmediumcanbeusedasaCANbustransmissionmediumis().ATwistedpairBFiberopticsCCoaxialcableDAlloftheaboveisfine第2題CANbushasthe"arbitration"function,thatis,whenmultiplenodedevicessenddatatothebusatthesametime,thelogicaloperationvalueofthesedataisusedasthebusoutput.Whentwonodedevicesoutputtothebusatthesametime,oneoutputs"0100"andoneoutputs"0010",thebusoutputs().A0100B0010C0110D0000第3題WhatdoesnotworkasafiberopticCANnetworktopologyis().ABusFormBRingCStarDAll3oftheaboveareacceptable第4題IntheCANBus2.0Btechnicalspecification,anextendedframehasanidentifierdigitof().A8bitsB11bitsC15digitsD29bits第5題ThetransmissionsignalofCAN_HandCAN_LofthetwosignallinesoftheCANbusis().ALevelsignalBDifferentialmodesignalCCommon-modesignalDDifferentialsignal第6題ThearbitrationsegmentoftheCANstandarddataframeincludes().A11bitidentifierIDandRTRB11bitidentifierIDandRTR.IDECIdentifierIDandSRRfor29bitD29bitidentifierIDandSRR.IDE第7題ThetransmissionsignalofthetwosignallinesCAN_HandCAN_LoftheCANbusofISO11898standardis3.5Vand1.5V,whichrepresents().ALogic0BLogic1CBusfreeDStateofuncertainty第8題bxCANhas()sendingmailboxes,andthesendingdispatcherdecideswhichonetosendfirst.A10B2C3D5第9題InthefollowingdescriptionoftheCANbus,theerroris().AThedatatransmissionoftheBC.busisessentiallytransmittedthroughvoltagechangesonthebus.CAtstatic,thevoltagetogroundofbothsignallinesisabout2.5V,indicatinglogic1DArecessivestatemeansthatthevoltagedifferencebetweenthetwowiresis0ELogical0whenCAN_Hvoltagetogroundis3.5andCAN_Lvoltagetogroundis0正確答案：E第10題InCANcommunication,theframeusedbythereceivingunittorequestdatafromthesendingunitwiththesameIDiscalled().ADataFramesBRemoteControlFrameCOverloadFrameDErrorframe第11題ThefollowingbxCAN,whichisnotpartoftheSTM32,hasthemainmodeofoperationas().AInitializationmodeBNormalmodeCLoopbackpatternDSleeppatterns第12題CANbussignallevelstandard()accordingtoISO11898.ALogic1,dominantlevel,CAN_HandCAN_Lpoweraverage2.5VBLogic0,dominantlevel,CAN_HandCAN_Lpoweraverage2.5VCLogic1,recessivelevel,CAN_HandCAN_Lelectricityaverage2.5VDLogic0,invisiblelevel,CAN_HandCAN_Lelectricityaverage2.5V第13題IntheCANbus,whatisnotaCANtransceivertypeis().AUniversalCANtransceiverBIsolateCANtransceiverCHighspeedCANtransceiverDPower-savingCANtransceiver第14題STM32F1seriesmicrocontrollersareintegratedwithCANcontrollerbxCAN,forbxCANiswrong().AContainsthreemailingboxesBContainsthreethirddepthFIFOsCCanbeinsleepmodeDAtestmodeisprovided第15題WhatiswrongaboutCANbuscommunicationis().AThemastersendstherequestframetotheslavenodeBThemasternodesensordataCANbesentdirectlytotheiotgatewayortotheCANbusCWhenyouviewthenodesensordatawithCANdebuggingAssistant,youmaynotbeabletoseetheprimarynodesensordataDFilterdataframesbyhardware第16題ThecommunicationdistanceofCANbusisupto().A1mB100mC1kmD10km第17題IntheCANbus,thedevicethatimplementstheinterconversionbetween"logiclevel"and"differencelevel"is().ACANtransceiverBCANcontrollerCMCUDTerminalmatchingresistor第18題()oftheCANbusfortransmittingdatafromthesendingunittothereceivingunit.ADataFramesBRemoteControlFrameCErrorFrameDOverloadFrame第19題InthedataframeoftheCANnetwork,thesegmentusedtocheckwhethertheframewastransmittedincorrectlyis().ACRCsegmentBACKsegmentCDatasegmentDControlsegment第20題InCANcommunication,whenanerrorisdetectedtonotifyotherunitsoftheerror,use().ADataFramesBRemoteControlFrameCErrorFrameDOverloadFrame第21題InCANcommunication,thereceivingunitinformsthesendingunitthatitisnotreadytoreceive,using().ADataFramesBRemoteControlFrameCErrorFrameDOverloadFrame第22題InCANcommunication,thedataframeandremotecontrolframeareseparatedfromthepreviousframe,and()isused.ADataFramesBFramespacingCErrorFrameDOverloadFrame第23題ReadastandarddataframewithaCANcardontheCANbus,thedatasegmentlengthis8bytes,thedatasegmentpartoftheframeis:030086BB000000000000,thenthisdataisthe()sensor,theaddressisthe()node'sdata().ATemperatureandhumidity,00BBBFlame,00BBCTemperatureandhumidity,BB00DFlames,BB00第24題ThefollowingstatementaboutthecharacteristicsoftheCANbus,whichiswrong,is().ALongdatatransmissiondistance(upto100km)BHighdatatransferrate(maximumdatatransferrate1Mbit/s)CWitherrordetectionandhandlingfunctionsDWithautomaticdataretransmissionfunction第25題CANbusisdevelopedby()companyforthemonitoringandexecutionoftheinternalcontrolsystemofautomobiles.ASimernsBBoschCPhlipsDSchneide第26題WhendataissentbyonenodeontheCANbus,itisbroadcastin()formtoallnodesinthenetwork.AMessagesBStringCNumbersDbytes第27題WhatiswrongwiththefollowingstatementaboutCANtechnicalspecificationsandstandardsis()ATheCANtechnicalspecificationmainlyreferstothephysicallayer(part)oftheOSIbasicreferencemodel.Datalinklayer.Thetransportlayer(part)andtheapplicationlayeraredefinedBTheISOorganizationhasstandardizedtheCANtechnicalspecificationsCTheISO11898/11519standardstandardizedthedatalinklayerandpartofthephysicallayeroftheCANtechnicalspecificationDCANopenandDeviceNetstandardsbelongtotheapplicationlayerprotocol第28題WhenthedatalengthcodefortheDLCfieldis:0101,whatisthenumberofbytestobetransferred?().A3B4C5D6第1題Wi-Fi6'sMU-MIMOtechnology,whichallowstheroutertocommunicatewithupto()devicesatthesametime.A2B4C8D16第2題TheATinstructionforscanningthelistofcurrentlyavailableAPhotspotsis().AAT+CWDHCPBAT+CWLAPCAT+CWMODEDAT+RST第3題ThefunctionofESP8266'sATinstruction"AT+RST"is()ASettheESP8266workingmodetoAPBSettheESP8266workingmodetoSTATIONCSettheESP8266toresetDSetuptheESP8266toconnecttotheserver第4題SettheESP8266Wi-Fimoduletoworkinsoft-AP+stationmodeandsendthecommand().AAT+CWMODE=0BAT+CWMODE=1CAT+CWMODE=2DAT+CWMODE=3第5題TheleastsecureWi-Fiencryptionmethodis().AWPA2BWPA2-PSKCWPADWEP第6題TheroleofESP8266Wi-FimoduleinexecutingtheAT+CIPSTARTcommandis().AStartAPworkingmodeBStartStationworkingmodeCEstablishaTCPconnectionorUDPtransmissionDStartsendingIPpackets第7題WhentheESP8266worksin()mode,itactsasarouterandotherdevicescanconnecttocommunicate.ASoft-APBStationCRepeatersDBridge第8題SetthecurrentAPhotspotSSIDname,loginpasswordchannelandencryptionmethodATinstructionis().AAT+CWDHCPBAT+CWSAP_CURCAT+CWMODEDAT+RST第9題Whichstandard()fromtheIEEE802.11familyisusedforWi-Fi6.AnBacCahDax第10題ThestandardforWi-Fiis().AIEEE802.15BIEEE802.11CIEEE802.16DIEEE802.20第11題Howmanytotalchannels()aredividedbyWi-Fiinthe12.2.4GHzISMband.A12B15C13D14第12題WhatmodeshouldtheWi-Fimoduleintheintelligentairconditionerworkinafterconnectingtotheparent'swirelessrouterthroughthedistributionnetwork()?ASitepatternBAccesspointmodeCSiteandaccesspointcoexistencemodeDOtherpatternsWirelessSensorNetworkTechnologyExercise-STM32第1題ADConverterindicatorsdonotinclude().AResolutionBTransitiontimeCAbsoluteprecisionDAnalog-to-digitalconversion第2題WhatisnottheSPIbuspinis().ASCLkBSDATCMOSIDMISO第3題ThemaximumclockfrequencyoftheAPB2andAPB1busesoftheSTM32F103chipis()respectively.A72MHz,72MHzB64MHz,64MHzC72MHz,36MHzD64MHz,36MHz第4題IftheLEDlightonthePA8pinoftheSTM32microcontrollerneedstobelit,thePA8pinshouldbesetto()operatingmode.AInputpull-upBPush-pulloutputCInputdrop-downDInputfloat第5題TheSTM32ADCinputsignalvoltageis1.1V,theknownsystempowersupplyis3.3V,andtheA/Dconversionaccuracyis12bits,thentheA/Dconversionresultshouldbe().A33B132C1365D4096第6題STCompanyprovidesstandardperipherallibraryforSTM32seriesmicrocontrollers.HALlibrary,LLlibrary,etc.,toimprovedevelopmentefficiency.Whichofthefollowingstatementiscorrect().ALLlibraryhasthebestversatilityBLLlibraryisthebestforeaseofuseCTheportabilityofHALlibraryisthebestDThestandardperipherallibraryoptimizesthechipbest第7題WhichstatementiswrongabouttheSTM32interrupt().ATheSM32F103seriesmicrocontrollerssupport10systemexceptioninterruptsand60mashableinterruptsBTheSTM32F103seriesmicrocontrollershavea16-levelprogrammableinterruptpriorityCTheinterruptpriorityoftheSTM32F103seriesmicrocontrollersisdividedintopreemptionpriorityandsub-priorityDThelargerthevalueoftheinterruptpriorityoftheSTM32F103seriesmicrocontroller,thehigherthepriority第8題InSTM32serialcommunicationinterruption,themacrousedtodeterminethatthereceiveflagbitisnotemptyis()AUART_FLAG_IDLEBUART_FLAG_RXNECUART_FLAG_OREDUART_FLAG_TXE第9題Asshowninthefigure,STM32connectstheLEDlightthroughPA0,andswitchestheLEDlight,thentheworkingmodeofPA0portneedstobesetas().AUniversalpush-pulloutputBUniversalopenleakoutputCReusepush-pulloutputDReuseopenleakageoutput第10題A12-bitresolutionADC,ifthesupplyvoltageis5V,whentheinputanalogis2V,theoutputdigitalcanbecalculatedas().A102B103C1638D1639第11題STM32deviceforhandlinginterruptsis().AGPIOBNVICCEXTIDCotex-M3第12題STM32timer6clocksat72MHzandisabletoachieveasettimingtimeof1secondis().APre-divider:71,countingperiod:999999BPre-divider:7199,countperiod:9999CPre-divider:9999,countperiod:9999DPre-divider:7200,countperiod:7200第13題STM32F103VET6has3()bitA-Dconverter.A8B12C16D24第14題STM32F103'shighestmainfrequencyis()MHzA72B36C18D9第15題WhentheHEXfileisburnedtotheflashmemoryoftheSTM32chipthroughtheserialport,thebootmodeoftheSTM32needstobesettothesystemflashboot,sotheleveloftheBOOT0andBOOT1pinsneedstobesetto()respectively.ALow0,low0BLow0,high1CHigh1,low0DHigh1,high1第16題TheGPIOsoftheSTM32fullserieschiparedividedintogroups,eachwith()pins.A4B16C8D32第17題TheAPIfunctionintheHALlibrarythatsetsorclearsthespecifiedinputpin(_PIN_)valueis().AHAL_GPIO_InitBHAL_GPIO_ReadPinCHAL_GPIO_WritePinDHAL_GPIO_Togglepin第18題HowSPIcommunicationstrobesslave().ASendslaveaddressBPulldowntheNSSpinconnectedtotheslaveCPulluptheNSSpinattachedtotheslaveDPulltheclockpinSCLKdown第19題STM32F1seriesisbasedonARM()coredesign.ACortex-M0BCortex-M3CCortex-M4DCortex-M7第20題STM32F1Xchiptimerdoesnothavethecapture/comparechannelfunctionis().ATIM1BTIM3CTIM5DTIM6第21題WhichADCconversionprocessiscorrect()?ASampling-Quantization-codingBQuantization-sampling-codingCSampling-coding-quantizationDCoding-sampling–quantization第22題WhenconfiguringtheGPIOportofSTM32topush-pulloutputModethroughtheHALlibrary,theinitialGPIOshouldsetmodeto()AGPIO_MODE_IT_FALLINGBGPIO_MODE_OUTPUT_PPCGPIO_MODE_OUTPUT_DDDGPIO_MODE_ANALOG第23題WhichofthefollowingtimeroftheSTM32F103VEchipbelongstotheadvancedtimer().ATIM1,TIM2ATIM3,TIM4BTIM6,TIM7CTIM1,TIM8第24題Theuint16_tdatatypedefinedintheHALlibrarycode,whichcanrepresenttherangeofvalues().A-32768~32767B0to65535C0to255D0~819200第25題DoestheSTM32'sExternalInterrupt/EventController()support()interrupt/eventrequests?A16B19C36D43第26題CC2530MCUtimer1countercountingmethodis()?AIncrement1countBMinus1countCIncrement2countDAdd1orsubtract1count第27題InSTM32CubeMX,theinterruptsthatneedtobesetforSTM32areinthe"SystemCore"optionontheleftsideofthe"Pinout&Configuration"TAB,selectthe()option.ADMABGPIOCIWDGDNVIC第28題Thearchitectureforreal-timeoperatingsysteminARMarchitectureis().ACortex-ABCortex-RCCortex-MDNoneoftheaboveiscorrect第29題ThearchitectureoftheCortex-M3processoris().Av4TBv5TECv6Dv7第30題TheNVICofSTM32F1xxgroupsthepreemptionandresponseprioritiesoftheNMIinterruptwith4digits,andthereareseveralsetsofmodes().AGroup2BGroup4CGroup5DGroup6第31題STM32timerwithcomplementaryoutputfunctionis().AAdvancedtimerBUniversaltimerCBasicTimerDWatchdogtimer第32題Therearetwowaystopressthebuttontoeliminateshake________?().AHardwareandsoftwareshakeoffBManualandhardwareshakeoffCMechanicalandsoftwareshakeoffDManualandmechanicalshakeoff第33題Inthefigurebelow,PC13_KEY1isconnectedtothePC13pinoftheSTM32F10X,thenthisIOportmapstotheexternalinterrupteventlineis().AEXTIwire3BEXTIwire13CEXTIwire23DEXTIline16第34題WhatiscorrectabouttheSTM32F1Xchipinterruptnestingis().AInterruptnestingispossiblewhenevertheresponsepriorityisnotthesameBInterruptnestingispossiblewheneverpreemptiveprioritiesarenotthesameCInterruptnestingispossibleonlyifboththepreemptivepriorityandtheresponsepriorityaredifferentDNoneoftheaboveistrue第35題Counterregister()ofSTM32'sprogrammableTIM1timer.ATIM1_RCRBTIM1_ARRCTIM1_PSCDTIM1_CNT第36題AllportsofSTM32haveexternalinterruptcapability.Whenusinganexternalinterrupt,thecorrespondingpinmustbeconfiguredas().AInputmodeBPush-pulloutputmodeCOpenleakyoutputmodeDReusepush-pulloutputmodeWirelessSensorNetworkTechnologyExercise-RS-485BusTechnology第1題TheModbusfunctioncodespecifiedintheModbusstandarddoesnotinclude().ACommonfunctioncodeBDefaultfunctioncodeCUser-definedfunctioncodeDRetainfunctioncode第2題TheRS485sendsthecollecteddatatothecloudplatform,andthepacketisdisplayedasDD1234010906004073.Thecollectedsensortypeis().AHumaninfraredsensorBFlamesensorCTemperatureandhumiditysensorDLightsensor第3題Thefunctionof0x03inthecommonModbusfunctioncodeis().AReadcoilstatusBReadholdregisterCReadinputregisterDWriteasingleholdregister第4題Forexample,aModbusRTUmodepacketis0601001600211C61,wherethefirstbyteof06indicates().AFunctioncode06BHostaddress06CSlaveaddress06DRandomcode第5題Currently,ownershipoftheModbusprotocolbelongstoOrganization().A3GPPBSchneiderCSipexDModbus-IDA第6題ThefollowingthingsthatarenottrueaboutstandardModbusfunctioncodesare().A0x01:ReadcoilregisterB0x02:ReadthediscreteinputregisterC0x03:ReadtheholdregisterD0x06:Writeholdregister第7題ThefollowingincorrectstatementabouttheRS-485busis().ATheRS-485busistwo-wire,half-duplexBRS-485busvoltagedifferencebetweenthetwolines+2V~+6V,representinglogic1CRS-485interfacecanbetransmittedbyshieldedtwistedpairDTheRS-485bushasamaximumtransferrateof200Kbps第8題WhenuploadingdatatothegatewayovertheRS485network,ifthedatafieldistwobytesandthehighbyteisthetemperaturevalue,whenthedataintheuploadeddatafieldis0x1840,theuploadedtemperaturevalueis()°C.A6B18C40D24第9題WhentheelectricalcharacteristicofRS485islogical0,thevoltagedifferencebetweenthetwolinesis().A2to6VB-2~-6VC3~15VD-3~-15V第10題ThemaindeviceintheModbusnetworksendsfunctioncode0x03,andifthereturnfromthedeviceexecutioniscorrect,thefunctioncodeinthereturnframefromthedeviceis().A0x03B0x83C0x00D0xFF第11題InaModbusnetwork,whenthemasterdeviceneedstosendrequestmessagestoallslavedevices,thedeviceaddressoftherequestmessageis().A0x08B0x04C0x02D0x00第12題InthefollowingdescriptionabouttheModbusprotocol,theerroris().AModbusisaparallelcommunicationprotocolBModibusisasinglemaster/multi-slavecommunicationprotocolCModbusisanapplicationlayerprotocolDTheModbuscommunicationprotocolincludesRTU.ASCII.TCP第13題WhentheelectricalcharacteristicofRS232islogic1,thevoltagedifferencebetweenthetwolinesis().A2to6VB-2~-6VC3~15VD-3~-15V第14題UseModBusprotocoltoreadthetemperatureandhumidityvalueoftheslavedevice,iftheslaveaddressis02,thefunctioncodeis03,thenumberofregistersis1,theregisteraddressis0,thecommunicationprotocolis().A030200000001......B03020001000000......C020300000001......D020300010000......第15題TheregisterPLCaddressforModbuscoilstatusis().A00001to09999B10001~19999C40001~49999D30001~39999第16題TheregisterPLCaddressofModbusdiscreteinputstateis().A00001~09999B10001~19999C40001~49999D30001~39999第17題TheregisterPLCaddressoftheModbusholdregisteris().A00001~09999B10001~19999C40001~49999D30001~39999第18題RegisterPLCaddressofModbusinputregisteris().A00001~09999B10001~19999C40001~49999D30001~39999第19題ThecontentsofModbusrequestandresponsemessagesdonotinclude().ADeviceaddressBHeadandtailofagreementCFunctioncodeDDatasegment第20題InRS-485basedModbuscommunication,themasternodesendsthemessage:060300D20004E587,thenthecorrectresponsemessageis().A060308026E01F3010659AB2C3DB060308026E01F3010659AB1E6AC060304026E01F31E6AD060304026E01F32C3D第21題FunctioncodesspecifiedintheModbusstandarddonotinclude().ACommonfunctioncodeBDefaultfunctioncodeCUser-definedfunctioncodeDRetainfunctioncode第22題InaModbusnetwork,theaddressoftheprimarydeviceis().A0x00B0x01C0xFFDNoaddress第23題RegistersintheModbuscommunicationprotocolareusedtostore()data.ADatasegmentBDeviceaddressCFunctioncodeDErrordetectionarea第24題TheabilityofRS-485totransmitoverlongdistancesismainlyduetothetransmissionusing().ASingle-endedsignalBDifferentialsignalCMessagedataDDataframes第25題InModbusRTUprotocol-basedcommunication,ifthemessagesentbythemasternodeis:080300770005354A,thetotalnumberofbytesinthedataframereturnedbythedevicenodeis()bytes.A8B13C14D15第26題ThefollowingdescriptionaboutModbuscommunicationtechnologyiscorrect().AMBussupportsASCIImessageframeformat,RTUmessageframeformat,CustomframeformatBTheslavedeviceisthedevicethatinitiatesthecommunication,andthemasterdeviceisthedevicethatreceivestherequestCTheRTUmessageframeformatcanhavepausesinthemiddleoftheframetransmission,butcannotexceed3.5charactertimesDModbususesbroadcastmodetorequestthedeviceaddressofthemessageas0第27題WhichofthefollowingisnotanintegralpartofaSerialasynchronouscommunicationdataframe().AStartingbitBConflictdetectionbitCDatabitsDStopbit第28題FortheRTUmodeofoperationoftheModbuscommunicationprotocol,thewrongstatementis().AThetransmitteddataisrepresentedinhexadecimalform.BCannotcommunicatewithModbusdevicesinASCIIworkingmode.CTakethetimeintervalasthemessageframestartandendcharacters.DAdoptLRCdataverificationmethod.第29題WhenModbuswritesasinglecoiloperation,tosetitto"ON",thedatasegmentcontentintherequestmessageshouldbe().A0x000x00B0x000xFFC0xFF0x00D0xFF0xFF第30題ThefollowingcorrectlyformattedModbusrequestmessageframeis().A0x060x010x000x160x000x210x1CB0x040x020x000x770x000x1E0x480x4DC0x060x030x000xD20x040xE50x87D0x060x040x010x900x050x300x6F第31題WhentheelectricalcharacteristicofRS485islogic1,thevol