【正文】 ............................................................................................. 9 CAN 總線的分層結(jié)構(gòu) .......................................................................................... 12 邏輯鏈路控制 (LLC)子層 ........................................................................... 12 媒體訪問控制 (MAC)子層 ......................................................................... 12 MAC 幀結(jié)構(gòu) .......................................................................................................... 13 MAC 數(shù)據(jù)幀 ................................................................................................ 13 出錯幀 ......................................................................................................... 14 超載幀 ......................................................................................................... 15 幀間空間 ..................................................................................................... 15 MAC 幀編碼和發(fā)送 /接收 .......................................................................... 15 錯誤檢測 ..................................................................................................... 16 錯誤類型 .................................................................................................. 16 錯誤界定規(guī)則 ........................................................................................ 17 物理層 .................................................................................................................... 17 東華理工大學(xué)長江學(xué)院畢業(yè)設(shè)計（論文） 目錄 IV 物理層功能模型 ......................................................................................... 17 位編碼 /解碼 ................................................................................................ 17 同步 ............................................................................................................. 18 CAN 控制器 ........................................................................................................... 18 分布式測量系統(tǒng)的總體設(shè)計 ............................................................................... 18 3 硬件設(shè)計 ............................................................ 22 PIC 單片機優(yōu)點和特點 ........................................................................................ 22 MCP2510 CAN 控制器特點 ................................................................................ 23 PCCAN 接口卡設(shè)計 ............................................................................................ 24 電源電路 ..................................................................................................... 26 復(fù)位電路 ..................................................................................................... 27 晶振電路 ..................................................................................................... 28 串口通信接口電路 ..................................................................................... 28 CAN 總線通訊電路 ..................................................................................... 29 節(jié)點硬件設(shè)計 ....................................................................................................... 30 4 結(jié)論與展望 .......................................................... 34 結(jié)論 ....................................................................................................................... 34 致 謝 ................................................................ 36 參考文獻(xiàn) .............................................................. 37 附錄 1 CAN 通訊部分 ................................................... 38 附錄 2 CAN 接口卡原理圖 ............................................... 39 東華理工大學(xué)長江學(xué)院畢業(yè)設(shè)計（論文） 緒論 1 緒論 現(xiàn)場總線 現(xiàn)場總線是一種數(shù)字式、雙向傳輸、多分支結(jié)構(gòu)的通信網(wǎng)絡(luò)。 Distributed Measu。 MCP2510CAN 控制器 東華理工大學(xué)長江學(xué)院畢業(yè)設(shè)計（論文） ABSTRACT II ABSTRACT The field bus is installs in the manufacture or in the process region scene installment and the control room between the automatic control device digital, serial, the multispot correspondence data puts up a correspondence bridge between the puter and the scene equipment, it is the global digitization, bidirectional, the multispot correspondence main line, has, the entire distribution, the Interoperability characteristic open style, is now one of automated domain technological development hot spots. CAN (controller area work) belongs to the field bus category, mainly uses in with other auxiliary equipment or the monolithic integrated circuit carries on the munication the module, this kind of connection agreement can carry on the correspondence in the big dry sound environment, has the good resistance to interference. A distributed measurement and control system was developed based on CAN field bus. The technologies in some fields including puter, control, munication, work and circuit design were used which enable a paratively rich functions in monitor and control, in addition to stable performance and friendly interface. Research content includes the research on hardware of node and CANPC interface card, software both running on node and interface card, and software running on PC for monitor and control of CAN research concrete duty is the power circuit, repositions the electric circuit, the crystal oscillator electric circuit, the serial port correspondence connection electric circuit, the CAN main line munication channel node, the hardware design drawing and the overall diagram. The main content of this thesis is as following: In the first chapter of this paper, the conceptions and features of distributed system, field buses are introduced. The traditional RS232 and RS485 serial munication standard are also discussed in this chapter. In the second chapter the CAN hierarchy structure, frame structure and munication princip