基于CAN總線的鐵路點(diǎn)燈監(jiān)控設(shè)計(jì)

電子信息工程論文編號:DZXX253  論文字?jǐn)?shù):13613,頁數(shù):44

目錄

摘要 I
ABSTRACT II
第1章 引言 1
1.1 背景 1
1.2 研究內(nèi)容和擬解決問題 1
1.3 課題設(shè)計(jì) 2
第二章  CAN總線原理 3
2.1 CAN總線主要特點(diǎn) 3
2.2 CAN總線通信協(xié)議分析 3
2.2.1 CAN總線報(bào)文傳輸結(jié)構(gòu) 4
2.3 CAN總線錯誤處理 6
2.3.1 錯誤檢測 6
2.3.2 錯誤標(biāo)定 6
2.4 CAN應(yīng)用層協(xié)議分析 7
2.4.1 數(shù)據(jù)發(fā)送機(jī)制 7
2.4.2 數(shù)據(jù)接收機(jī)制 8
第三章  系統(tǒng)硬件電路設(shè)計(jì) 10
3.1電源的設(shè)計(jì) 10
3.2 CPU控制電路的設(shè)計(jì) 12
3.2.1 處理器的選擇 13
3.2.2 LPC2119與AT24C64的電路設(shè)計(jì) 14
3.2.3看門狗電路的設(shè)計(jì) 14
3.2.4 物理層接口電路設(shè)計(jì) 15
3.2.5 ISO標(biāo)準(zhǔn)模型分析 16
3.3 點(diǎn)燈單元電路和電壓采樣電路設(shè)計(jì) 17
3.4 系統(tǒng)調(diào)試 17
第四章 軟件設(shè)計(jì) 21
4.1 CAN總線數(shù)據(jù)通信軟件設(shè)計(jì) 22
4.1.1 CAN總線通信初始化 22
4.1.2  CAN報(bào)文發(fā)送軟件設(shè)計(jì) 23
4.1.3 CAN報(bào)文接收軟件設(shè)計(jì) 25
4.2  信號燈狀態(tài)監(jiān)測軟件設(shè)計(jì) 28
4.2.1  電壓采集軟件設(shè)計(jì) 29
第5章 結(jié)論 31
5.1 完成的工作 31
5.2 存在問題和未來展望 31
參考文獻(xiàn) 34
附錄1：實(shí)物圖片 35
附錄2：主函數(shù)定義程序 37

摘要

 CAN總線是一種多主串行數(shù)據(jù)通信協(xié)議。本課題基于帶CAN控制器的LPC2119 ARM核處理器，提出一個簡單可靠實(shí)時(shí)的遠(yuǎn)程數(shù)據(jù)傳輸網(wǎng)絡(luò)方案。室外節(jié)點(diǎn)利用LPC2119處理器實(shí)現(xiàn)對信號燈狀態(tài)監(jiān)控及燈絲電壓的數(shù)據(jù)采集，經(jīng)82C250發(fā)送到總線上。數(shù)據(jù)通過總線傳輸?shù)绞覂?nèi)集中管理機(jī)上實(shí)時(shí)顯示，出現(xiàn)異常進(jìn)行文字和語音報(bào)警。集中管理機(jī)也可以把信息發(fā)到總線上，經(jīng)過82C250接收并送到處理器處理，從而實(shí)現(xiàn)遠(yuǎn)程控制。本文主要介紹了CAN總線的基本原理和傳輸協(xié)議、節(jié)點(diǎn)的設(shè)計(jì)，最后給出了具體的軟硬件設(shè)計(jì)和實(shí)現(xiàn)。

關(guān)鍵詞：CAN總線，LPC2119核處理器，數(shù)據(jù)幀，遠(yuǎn)程控制

ABSTRACT
 
 CAN Bus is some sort of a serial data communication protocol .In this thesis, we design to fulfill a simple and reliable, real-time, remote data transmission program  based on the LPC2119 ARM processor with CAN controllers. Outdoor nodes use LPC2119 processor for the control of signal light and the collection of Filament voltage. The data processed conversion to specific agreements data frame through built-in CAN controllers and sent to the bus through 82C250. Data transmission interior to the Centralized management through the bus and display real-time. the management send text and voice alarm when Unusual .Centralized management can also made the information to the bus, to receive and deal after 82C250 processor ,So it can achieve remote control. This article introduces the basic tenets of the CAN bus and transfer agreement, the joint design .It also gives the design and implementation of specific hardware and software.

Keywords: CAN bus, LPC2119 core processors,  data frame,  remote control