目 錄
摘要 I
Abstract II
0 緒論 1
1 車載網(wǎng)絡(luò)介紹 2
1.1 車載網(wǎng)絡(luò)分類 2
1.1.1 A類網(wǎng)絡(luò)標(biāo)準(zhǔn) 2
1.1.2 B類網(wǎng)絡(luò)標(biāo)準(zhǔn) 3
1.1.3 C類網(wǎng)絡(luò)標(biāo)準(zhǔn) 4
1.1.4 診斷系統(tǒng)總線標(biāo)準(zhǔn) 5
1.1.5 多媒體信息系統(tǒng)總線標(biāo)準(zhǔn) 5
1.1.6 安全總線和標(biāo)準(zhǔn) 6
1.2 汽車總線的發(fā)展趨勢(shì) 7
2 CAN總線協(xié)議分析 8
2.1 CAN總線基礎(chǔ)知識(shí) 8
2.1.1 CAN的獨(dú)特性能 8
2.1.2 CAN的基本概念 9
2.2 CAN協(xié)議規(guī)范 10
2.2.1 CAN 的幀結(jié)構(gòu) 10
2.2.2 CAN 的分層結(jié)構(gòu) 17
2.2.3 CAN 總線的錯(cuò)誤類型 17
2.2.4振蕩器容差 18
2.2.5 位定時(shí)與位同步 18
2.2.6 CAN 通信規(guī)則 21
2.2.7 差錯(cuò)控制 22
2.3小結(jié) 22
3 CAN總線節(jié)點(diǎn)設(shè)計(jì) 23
3.1 CAN總線常用器件 23
3.1.1 CAN控制器SJA1000介紹 23
3.1.2 CAN收發(fā)器TJA1050介紹 27
3.2 CAN總線節(jié)點(diǎn)硬件設(shè)計(jì) 28
3.3 CAN總線節(jié)點(diǎn)軟件設(shè)計(jì) 29
3.3.1 CAN初始化子程序 29
3.3.2 CAN接收、發(fā)送子程序 30
3.4 小結(jié) 31
4 CAN總線的輔助網(wǎng)絡(luò) 32
4.1輔助網(wǎng)絡(luò)的選擇 32
4.1.1 LIN網(wǎng)絡(luò)介紹 32
4.1.2 低速容錯(cuò)CAN 33
4.2輔助網(wǎng)絡(luò)的節(jié)點(diǎn)設(shè)計(jì) 33
4.2.1 LIN總線節(jié)點(diǎn)的設(shè)計(jì) 33
4.2.2 LIN總線通訊軟件的設(shè)計(jì) 34
4.3 CAN與輔助網(wǎng)絡(luò)的網(wǎng)關(guān)設(shè)計(jì) 35
4.3.1 器件選擇 35
4.3.2 CAN網(wǎng)關(guān)的硬件電路設(shè)計(jì) 35
4.3.3 CAN網(wǎng)絡(luò)網(wǎng)關(guān)系統(tǒng)軟件設(shè)計(jì) 36
4.4 小結(jié) 37
5 結(jié)論及展望 38
致謝 39
參考文獻(xiàn) 40
附錄1 CAN節(jié)點(diǎn)原理圖 41
附錄2 LIN節(jié)點(diǎn)原理圖 42
附錄3 實(shí)物圖片 43

 
摘要
CAN作為一種新興的并廣泛應(yīng)用于汽車領(lǐng)域的一種局域網(wǎng)，得到了越來越多的關(guān)注和應(yīng)用，因此，很有必要對(duì)CAN總線的汽車局域網(wǎng)技術(shù)方面做一個(gè)比較深入的研究。本文從研究汽車局域網(wǎng)入手，主要研究了國內(nèi)外汽車控制器局域網(wǎng)的發(fā)展與現(xiàn)狀，對(duì)當(dāng)今國際汽車行業(yè)中應(yīng)用最廣的CAN總線原理和應(yīng)用進(jìn)行了深入研究與吸收。并在此基礎(chǔ)上提出結(jié)合主干網(wǎng)CAN與輔助網(wǎng)絡(luò)，為汽車網(wǎng)絡(luò)提供更完善的通訊服務(wù)的數(shù)據(jù)共享模型。此外，還設(shè)計(jì)了CAN節(jié)點(diǎn)、輔助網(wǎng)絡(luò)節(jié)點(diǎn)以及總線網(wǎng)關(guān)。本文的研究，可以作為CAN總線在汽車上應(yīng)用的有益探索，對(duì)實(shí)現(xiàn)汽車信息化具有一定的指導(dǎo)意義。
本文重點(diǎn)研究CAN主干網(wǎng)結(jié)合輔助網(wǎng)絡(luò)的技術(shù)可行性、可靠性等方面內(nèi)容；不同網(wǎng)絡(luò)之間的數(shù)據(jù)共享方案也是重點(diǎn)關(guān)注的技術(shù)問題。論文首先從汽車網(wǎng)絡(luò)入手，分析當(dāng)前汽車網(wǎng)絡(luò)的各種分類，比較各種網(wǎng)絡(luò)的優(yōu)缺點(diǎn)；然后深入分析Bosch CAN 2.0規(guī)范的要點(diǎn)及CAN總線的工作原理，為后面的節(jié)點(diǎn)設(shè)計(jì)打下理論基礎(chǔ)；接著設(shè)計(jì)CAN節(jié)點(diǎn)的硬件和軟件；最后就輔助網(wǎng)絡(luò)的選擇、輔助網(wǎng)絡(luò)的職能分配、節(jié)點(diǎn)管理以及網(wǎng)關(guān)的研究設(shè)計(jì)等內(nèi)容作了一個(gè)全面分析研究，采取有效的方法來降低主干網(wǎng)的總線負(fù)荷和總線堵塞的風(fēng)險(xiǎn)。最終目的就是提出一個(gè)適合我國汽車工業(yè)應(yīng)用的汽車網(wǎng)絡(luò)通訊模型，為我國的汽車網(wǎng)絡(luò)發(fā)展盡一份微薄之力。

關(guān)鍵詞：汽車電子控制器局域網(wǎng)，CAN現(xiàn)場(chǎng)總線，LIN總線，輔助網(wǎng)絡(luò)，網(wǎng)關(guān)設(shè)計(jì)

Abstract
As a new local area network and being expand applied in Auto manufacturing area, CAN has being got more and more attract and application. Hence, it is necessary to have a study on the Auto LAN based on CAN bus technology in depth. This paper starts with normal Auto LAN, mainly emphasizes on the development and present status of Auto LAN study both in civil and abroad. Then a view is come up with combining with main frame network and assistant network, and thus a more complete communication service and data sharing model is supplied for Auto LAN. Beside above, a suit of a CAN node, an assistant network node and bus gateway is designed. The study in this paper, can be supposed to be as a signally explore during the application of CAN bus in Auto industry, and has a meaningful instruction to Auto-information.
Thesis priority studies the CAN main network and assists network aspect content such as technical feasibility, reliability being tied in integration.The data share scheme between different network is also the technology problem that priority shows solicitude for. The thesis complies with the automobile network first starting, analyse current network various automobile classification, the network comparatively various excellent shortcoming. Then analyse Bosch CAN 2.0 specification in depth and study CAN bus operating principle, establish a theory basis for following nodes design. And then, design CAN nodes hardware and software.Finally the paper will study roundly about the choise of the assistant network, assistant network’s function assignment, nodes management and bus gateway. Take effective method to reduce the risk of bus load and bus jam. Ultimate purpose is to suggest that one is suitable to the automobile network communication model that our country auto industry applies, contribute my little strength to our country network develops.

Keywords: Auto Electronics Controllers’ local area network, CAN field bus, LIN bus, assistant network, gateway design