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《基于arm的以太網(wǎng)網(wǎng)關(guān)設(shè)計(jì)與實(shí)現(xiàn)畢業(yè)論文》由會(huì)員上傳分享，免費(fèi)在線閱讀，更多相關(guān)內(nèi)容在學(xué)術(shù)論文-天天文庫(kù)。
1、┊┊┊┊┊裝┊┊┊┊┊┊┊訂┊┊┊┊┊┊線┊┊┊┊┊大連海事大學(xué)畢業(yè)論文二○一四年六月基于ARM的以太網(wǎng)網(wǎng)關(guān)設(shè)計(jì)與實(shí)現(xiàn)專(zhuān)業(yè)班級(jí)：通信工程3班姓名：計(jì)平元指導(dǎo)教師：畢勝信息科學(xué)技術(shù)學(xué)院摘要CAN總線作為現(xiàn)場(chǎng)總線的一種，與一般的通信總線相比，具有突出的可靠性、實(shí)時(shí)性和靈活性。以太網(wǎng)作為構(gòu)筑互連網(wǎng)的一種最普及的局域網(wǎng)技術(shù)，具有較好的穩(wěn)定性和傳輸數(shù)據(jù)的高效性等特點(diǎn)，還能夠支持互連網(wǎng)絡(luò)的遠(yuǎn)程訪問(wèn)。但是它不能直接和工業(yè)設(shè)備相連進(jìn)行通信。將兩種不同適用范圍的網(wǎng)絡(luò)進(jìn)行連接以利用各自的優(yōu)點(diǎn)實(shí)現(xiàn)對(duì)工業(yè)生產(chǎn)的監(jiān)控和管理，就需要
2、通過(guò)網(wǎng)關(guān)來(lái)實(shí)現(xiàn)。本文在深入的研究了CAN2.0協(xié)議、TCP/IP協(xié)議的特點(diǎn)及實(shí)現(xiàn)原理后，提出了一種以太網(wǎng)和CAN總線互聯(lián)的網(wǎng)關(guān)模型。以SBC6845ARM開(kāi)發(fā)板（搭載內(nèi)核為ARM9的AT91SAM9G45處理器)為硬件平臺(tái)，以嵌入式Linux為軟件平臺(tái)，利用GEDIT工具進(jìn)行軟件設(shè)計(jì)，采用4個(gè)線程分別處理上行數(shù)據(jù)和下行數(shù)據(jù)的存儲(chǔ)和轉(zhuǎn)發(fā)，對(duì)CAN總線協(xié)議和TCP/IP協(xié)議進(jìn)行轉(zhuǎn)換，實(shí)現(xiàn)了以太網(wǎng)與CAN總線的互聯(lián)。從而允許在控制室內(nèi)對(duì)現(xiàn)場(chǎng)中的設(shè)備進(jìn)行訪問(wèn)、監(jiān)控與管理。測(cè)試結(jié)果表明，本設(shè)計(jì)實(shí)現(xiàn)了系統(tǒng)設(shè)計(jì)功能。關(guān)
3、鍵詞：Linux；CAN總線；以太網(wǎng)；網(wǎng)關(guān)IVABSTRACTCANbusasafieldbus,hasoutstandingreliability,timelinessandflexibility,comparedwiththegeneralcommunicationbus.EthernetInternetconstructedasoneofthemostpopularLANtechnology,hasnotonlyhighefficiencyandgoodstabilitycharacteristic
4、softhetransmissiondata,butalsotheinterconnectionnetworkforremoteaccess.Butitcannotbedirectlyconnectedtoindustrialequipmenttocommunicate.Connecttingthescopeofapplicationoftwodifferentnetworkinordertoexploittheiradvantagestoachieveindustrialproductionmonito
5、ringandmanagement,weneedtorealizethroughthegateway.Inthispaper,in-depthstudyoftheCAN2.0agreementandimplementationoftheprinciplecharacteristicsofTCP/IPprotocol,ithasmadeanEthernetandCANbusinterconnectiongatewaymodel.WiththehardwareplatformofSBC6845ARMdevel
6、opmentboard(equippedwiththeAT91SAM9G45ARM9processorkernel)andandthesoftwareplatformofembeddedLinux,usingGEDITtoolsforsoftwaredesign,usingfourthreadstoprocessstoreandforwarddatauplinkanddownlinkdata,convertingCANbusprotocolandTCP/IPprotocol,itachievesthein
7、terconnectionofEthernetandCANbus.Thus,wecanvisitthefield?equipment,monitorandmanageitinthecontrolroom.Thetestresultsshowthatthedesignofthesystemachievesdesignfunction.Keywords:Linux,CANBUS,Ethernet,GatewayIV目錄第1章緒論11.1課題研究的背景及意義11.2CAN總線和以太網(wǎng)技術(shù)的研究現(xiàn)狀11.2.1C
8、AN總線的研究現(xiàn)狀11.2.2以太網(wǎng)的研究現(xiàn)狀21.3本文的主要工作2第2章CAN總線和以太網(wǎng)簡(jiǎn)介32.1CAN總線簡(jiǎn)介32.2以太網(wǎng)簡(jiǎn)介8第3章系統(tǒng)硬件設(shè)計(jì)93.1硬件總體方案設(shè)計(jì)93.2硬件電路設(shè)計(jì)113.2.1核心處理器113.2.2CAN總線電路123.2.3以太網(wǎng)電路13第4章系統(tǒng)軟件設(shè)計(jì)164.1嵌入式系統(tǒng)特點(diǎn)及開(kāi)發(fā)流程164.2CAN總線模塊軟件設(shè)計(jì)174.3以太網(wǎng)模塊軟件設(shè)計(jì)174.3.1TCP客戶端建立連接1
