【正文】 W realization of the munication between. To construct a system first posed by two CAN node of the most simple CAN work. Two nodes software design, to realize mutual munication and data transceiver, meanwhile in automobile CAN applicationlayer protocol basis, PC node to receive message processing, CAN get virtual instrument corresponding each control the data. Among them, the LabVIEW virtual instrument based on SCM system development and the C programming language is the design of the key and difficult. Key words: CAN Bus； Automotive Instrument； LabVIEW； C Language； SCM 目 錄 摘要 ...................................................................................................................................... Ⅰ Abstract ............................................................................................................................... Ⅱ 第 1 章 緒論 ....................................................................................................................... 1 課題研究的目的和意義 ........................................................................................... 1 汽車 儀表 的發(fā)展 ....................................................................................................... 2 CAN 總線技術(shù)推動(dòng)汽車儀表的升級(jí)換代 .............................................................. 2 研究的基本內(nèi)容 ....................................................................................................... 3 第 2 章 CAN 總線原理 ................................................................................................... 5 汽車總線 ................................................................................................................... 5 CAN 總線 .................................................................................................................. 5 CAN 總線簡介 ................................................................................................. 5 CAN 總線基本特點(diǎn) ......................................................................................... 7 CAN 總線通訊介質(zhì)訪 問控制方式 ................................................................. 7 CAN 總線的物理層設(shè)計(jì) ................................................................................. 8 CAN 應(yīng)用軟件設(shè)計(jì)原則 ................................................................................. 8 汽車的其他總線 ....................................................................................................... 8 LIN 總線簡介 ................................................................................................... 8 FLEXRAY 總線簡介 ........................................................................................ 9 MOST 總線簡介 ............................................................................................. 10 汽車總線比較 ..................................................................................................11 汽車通訊協(xié)議 ..........................................................................................................11 SAE J1939 通訊協(xié)議 .......................................................................................11 CAN 總線協(xié)議 ............................................................................................... 12 本章小結(jié) ................................................................................................................. 15 第 3 章 汽車智能儀表系統(tǒng)的硬件設(shè)計(jì) .................................................................. 16 硬件系統(tǒng)的組成 ..................................................................................................... 16 微處理器 的選擇 ..................................................................................................... 17 微處理器的介紹 ..................................................................................................... 17 MSCAN 總線模塊 .................................................................................................. 18 CAN 總線節(jié)點(diǎn)的搭建 ............................................................................................ 21 串行接口 電路 的 設(shè)計(jì) ............................................................................................. 22 按鍵 電路設(shè)計(jì) ......................................................................................................... 22 電位計(jì) 電路設(shè)計(jì) ..................................................................................................... 22 本章小結(jié) ................................................................................................................. 24 第 4 章 汽車智能儀表系統(tǒng)的軟件設(shè)計(jì) .................................................................. 25 LABVIEW 簡介 ...................................................................................................... 25 下位機(jī)主程序流程圖 ............................................................................................. 28 上位機(jī)流程圖 ......................................................................................................... 29 按鍵中斷函數(shù)流程圖 ............................................................................................. 29 CAN 總線程序 ........................................................................................................ 30 本章小結(jié) ................................................................................................................. 44 第 5 章 系統(tǒng) 測試 ............................................................................................................ 45 整體概述 ................................................................................................................. 45 測試 ......................................................................................................................... 46 本章小結(jié) ................................................................................................................. 53 結(jié)論 ............................................