TMS320F28335DSP与PC机的串行通信设计

MICROPROCESSORSTMS320F28335DSPPC*257061TMS320F28335DSPPCRS485、RS485。DSPDSPDSPPC。MSCOMMRS－485DOI10．3969/j．issn．1002－2279．2011．04．009TP311．52A1002－2279201104－0031－03ADesignofSerialCommunicationBetweentheTMS320F28335DSPandPCXUQiangZHAORen－deMAShuaiCollegeofInformationandControlEngineeringChinaUniversityofPetroleumDongying257061ChinaAbstractThepaperintroducesserialcommunicationbetweentheTMS320F28335DSPandPCthroughRS485．Thenthesoftwaredesignsandthecircuitconnectionisprovided．DSPcommunicationprogramusingpolledalgorithmswithstatusflagscancombinewithotherprogramsandensurethattheserialcommunicationbetweenDSPandPCwillnotdisturbotherfunctions．KeywordsDSPMSCOMMOCXRS－485CommunicationSerialCommunication1DSP。DSPDSPPCDSPPCPCDSP。TMS320F28335TMS320FC2000DSP1、、、、。SCICPU4。F2833516FIFOFIFO。VC++6．0WindowsPCDSP。2DSPPCF28335SCIA、SCIB、SCICI/OSCIxTXDSCIxRXDxA、B、C。SCIxTXDSCIxRXDRS－232MAX3232。RS－2322。、RS－485。RSM3485CHT5、、RS－485RSM3485CHTDSPRS－485。1。RSM3485CHT3DSPSCIxTXD4DSPSCIxRXD5、420118No．4Aug．2011*10CX04036A1987－、。2011－03－08DSPI/O55。PCRS－232PCRS－485/RS－232RS－485。1RS－485PCTMS320F283353DSPPCDSPCCS3．3VC++6．0。9600bit/s、8、1。PCDSPDSPPCPC。3．1DSP3．1．1DSPF28335SCI4。SCI、、、。。。DSPDSP。DSP。。。FIFOSCIFIFOSCIFFTXTXFFSTFIFOSCIFIFOSCIFFRXRXFFSTFIFO。。。SCIScibRegs．SCICCR．all=0x0007//18ScibRegs．SCICTL1．all=0x0003//TXRXSCICLKScibRegs．SCICTL2．all=0x0003ScibRegs．SCICTL2．bit．TXINTENA=0//TXRDYScibRegs．SCICTL2．bit．RXBKINTENA=0//RXRDYScibRegs．SCIHBAUD=0x0001ScibRegs．SCILBAUD=0x00E7//CPU150MHZ9600bit/sScibRegs．SCICTL1．all=0x0023//SCISCIFIFOScibRegs．SCIFFTX．all=0xE040//FIFOTXFIFOScibRegs．SCIFFRX．all=0x204f//RXFIFOScibRegs．SCIFFCT．all=0x0GPIORSM3485CHTGPIOGpioDataRegs．GPASET．bit．GPIO17=1//DSPRSM3485CHT。3．1．22。WhileScicRegs．SCIFFRX．bit．RXFFST=0……//FIFOforwhile。DSP。。msRSM3485CHT。·23·2011TMS320F28335DSPPCRSM3485CHT。。2DSP3．2PCVC++6．0ActiveXMSCOMM1。#include“mscomm．h”。3．2．1。“”myComm．SetCommPortPort//myComm．SetSettings“9600N81”//9600bit/s81myComm．SetInBufferSize1024//myComm．SetOutBufferSize1024//myComm．SetInBufferCount0//myComm．SetInputMode1//myComm．SetRThreshold1//myComm．SetPortOpen1//“Port”COM。“”myComm．SetPortOpen0//“”“”。PC。3．2．2MSCommGetinputSetOutput。VARIANTPC。Count=m_senddata．GetLength//CByteArraym_Array//CbyteArraym_Array．RemoveAll//m_Array．SetSizeCount//m_ArrayFori=0i＜Count++m_Array．SetAtim_senddata．GetAti//CbyteArraym_ArraymyComm．SetOutputColeVariantm_Array//m_ArrayColeVariantMSCommOnComm1myComm．GetCommEvent2VARIANTm_input//VARIANTBYTEdata1000//BYTECOleSafeArraysafearray//COleSafeArraym_input=myComm．GetInput//safearray=m_input//VARIANTCOleSafeArrayLenl=safearray．GetOneDimSize//Fork=0k＜lenlk++safearray．GetElement＆kdata+k//BYTEdata37·33·4Ti、T'iATi。RTi、RT'iTi、T'iRAA1。k1、k2、k30＜k1、k2、k3＜1k1+k2+k3=1。PageRank。URL。。URLURLURL。PR'AURLURL。URLURL。PageRank。4Internet。———、。。1．D．2006．2MichaelChauHsinchunChenetc．AWebPortalforNanoscaleScienceandTechnologyA．InternationalConferenceonDigitalLibrariesC．NewYorkUSAACMPress2002373－373．3SCharkrabartiBDom．FocusedcrawlingAnewapproachtotopic－specificWebresourcediscoveryA．ComputerNetworksC．NetherlandsElsevierScience19991623－1640．4．WEBD．2006．5PangningTanVipinKumar．ModelingofWebRobotNav-igationalPatternsA．WebMiningforE－CommerceC．BostonUSAACMPress2000．6OWKwonJHLee．WebPageClassificationBasedonK－nearestNeighborApproachA．InternationalWork-shoponInformationRetrievalwithAsiaLanguagesC．NewYorkUSAACMPress20009－15．7TaoMengHongfeiYanJiminWangXiaomingLi．Theevolutionoflink－attributesforpagesanditsimplicationsonWebcrawlingA．WebIntelligenceC．WashingtonUSAIEEEComputerSociety2004578－581．33、。PCPCPC。4TMS320F28335DSPPCRS－485、。。1．VisualC++M．2009．2．DSPPCJ．20084155－157．3TexasInstruments．TMS320F28335TMS320F28334TMS320F28332DigitalSignalControllersDSCsDataManualZ．TexasInstruments2007．4TexasInstruments．TMS320x28xx28xxxDSPSerialCom-municationInterfaceSCIReferenceGuideZ．TexasInstruments2004．5．RS－485Z．2009．·73·4