一种基于FPGA的Modbus通信协议的接口设计与应用

20133InstrumentTechniqueandSensor2013No.32012－03－132012－12－26FPGAModbus116024FPGAModbus。ModbusFPGA、、。、。FPGAModbusTP216A1002－1841201303－0079－02DesignandApplicationofModbusCommunicationProtocolInterfaceBasedonFPGACAOJian-fengCHENXingWANGMing-zhiSchoolofMechanicalEngineeringDalianUniversityofTechnologyDalian116024ChinaAbstractThispaperdesignedasortofModbusprotocolcommunicationinterfacebasedonFPGApinpointingattheproblemoftheremotevideomonitoringconfigurationproblem．Thesub-moduledivisiondesignsimulationandverificationoftheinterfacewererealizedthroughouttheanalysisoftheModbuscommunicationprotocolandtheapplicationofFPGAtop-downmodulardesignconcept．Theresultsshowthatthiscommunicationinterfacecancompleteremoteconfigurationoftheimagesensorinthevideomo-nitoringinasuperiorqualitywithahighreliabilityflexibilityandstability．KeywordsvideomonitoringFPGAModbus0。、、、。———。FPGAModbusFPGA、Modbus、、、。。1Modbus2080、。ModbusASCII、RTURemoteTerminalUnit。ASCII12ASCIIRTU11RTU1PCRS－232/485。ModbusRTU、、、、CRC、。13．5112551～25522Mod-bus25513.5。ModbusModbus。Modbus。1123、4216CRC。Modbus1、2、32。21。1CycloneⅡFPGA。80InstrumentTechniqueandSensorMar.2013FPGAEP2C5Q208C84608RAM119808。。。Modbus1。Modbus1200bit/s－115200bit/s。2。ModbusRS－232/485RAMRX。3。TX。4CRC。CRCCRC。CRC0XA001。。CRCCRCFPGACRCFPGA。RTL2。2CRCCRC1。1CRCclk50Mrst_noutdata_endsend_crc_beginCRCsend_data7．．0send_crc_overCRCcrc_result15．．0CRC5RAM。512RAMModbusRAM。CRCFPGACRC1127。6SCCB。CMOSSCCBSIO_clkSIO_data。RAM。。3QuartusII8．1VerilogFP-GAModbusModelsim6．2。PCFPGARS－485PCRS－232/RS－485。VB．NET、ModbusRTU。ModbusRTUCRC1Modbus。3。3ModbusModbusRTUModbus。3312。PC0101。1011000003A04～17172。RAM3.5。3.5。2CRCFPGACRCCRC。8484InstrumentTechniqueandSensorMar.20138OR0．7。。。5。。。。1AKYIDIZILEEWVURANMetal．Nextgeneration/dynamicspectrumaccess/cognitiveradiowirelessnetworksAsurvey．Com-puterNetworksvol．50no．13pp．2127－2159Sep．2006．2．．5．2001．3URKNOWITZH．Energydetectionofunknowndeterministicsignals．Proc．IEEE196755．4CABRICDJMISHRASMBRODERSENRW．Implementationis-suesinspectrumsensingforcognitiveradios．ConferenceRecordoftheThirty-EighthAsilomarConferenceonSignalsSystemandCom-puters2004．5CLANCYTCARBAUGHWA．Measuringinterferencetemperature．Virginiatechsymposiumonwirelesspersonalcommunications2006．6WILDBBERKELEYU．DetectingPrimaryReceiversforCognitiveRadioApplicationsIntegrationTheVlsiJournal2005124－130．7．．2007762－63．8GHASEMIASOUSAES．CollaborativeSpectrumsensingforoppor-tunisticaccessinfadingenvironments．20051stIEEEInternationalSymposiumonNewFrontiersinDynamicSpectrumAccessNetworksDySPAN2005．9DIGHAMFFALOUINIMSSIMONMK．Ontheenergydetectionofunknownsignalsoverfadingchannels．InProc．ofIEEEInternationalConferenceonCommunicationsICC’0320033575－35792003．10HANWJLIJD．EfficientCooperativeSpectrumSensingwithMini-mumOverheadinCognitiveRadio．IEEETransactionsonWirelessCommunications2010．11CHENTZHANGHGMAGGIOGMetal．CogMeshACluster-BasedCognitiveRadioNetwork．20072ndIEEEInternationalSympo-siumonNewFrontiersinDynamicSpectrumAccessNetworkspp．2007168－178．1988—[e-mail]80E161CRC。1127。FPGA。RS－485CMOSOV76703170。RAMRAM512。RAM2。RAMSCCBRAM1320×240REG16。4ModbusVerilogModbusRTU。OV7670。OV7670。。1．Modbus．2007281－87．2．ARM9Modbus．2007545－48．3．．2004731－33．1985—FPGA。[e-mail]