發(fā)布時(shí)間：2018-05-25 14:03

  本文選題：嵌入式系統(tǒng) + 列車通信網(wǎng)絡(luò)��； 參考：《北京交通大學(xué)》2012年碩士論文

【摘要】：為實(shí)時(shí)、可靠地對(duì)TCN運(yùn)行情況進(jìn)行監(jiān)控,目前實(shí)際列車通信設(shè)備中往往設(shè)置車載計(jì)算機(jī)作為其核心。嵌入式系統(tǒng)是控制、監(jiān)視或者輔助控制設(shè)備運(yùn)行的系統(tǒng),它是軟件和硬件的結(jié)合體,適用于像車載計(jì)算機(jī)應(yīng)用系統(tǒng)這樣對(duì)功能、可靠性、體積和功耗要求都比較嚴(yán)格的專用計(jì)算機(jī)系統(tǒng)。國(guó)外對(duì)列車通信設(shè)備的開發(fā)技術(shù)相對(duì)成熟,已經(jīng)實(shí)現(xiàn)了嵌入式車載計(jì)算機(jī)與TCN技術(shù)的結(jié)合,且正形成壟斷態(tài)勢(shì)。而國(guó)內(nèi)對(duì)該項(xiàng)技術(shù)的研究起步較晚,開發(fā)應(yīng)用較少,尚需搭建實(shí)驗(yàn)平臺(tái),開發(fā)出具有自主知識(shí)產(chǎn)權(quán)的設(shè)備產(chǎn)品,以增強(qiáng)國(guó)際競(jìng)爭(zhēng)力并推動(dòng)我國(guó)列車通信網(wǎng)絡(luò)的建設(shè)。 VME總線是嵌入式系統(tǒng)常用的板級(jí)通信總線。本文以實(shí)現(xiàn)VME的板級(jí)通信為切入點(diǎn),搭建了嵌入式計(jì)算機(jī)與TCN網(wǎng)絡(luò)MVB層的互聯(lián)系統(tǒng),使得該通信設(shè)備具有MVB網(wǎng)絡(luò)接口功能。因?yàn)閷?shí)驗(yàn)室的MVB技術(shù)成熟,所以研究工作主要圍繞嵌入式系統(tǒng)主控單元和VME總線接口展開。 嵌入式系統(tǒng)主控單元是基于Power PC處理器MPC8245,在VxWorks操作系統(tǒng)中對(duì)開發(fā)板自下向上進(jìn)行了二次開發(fā),以滿足硬軟件實(shí)際的接口和功能需求。硬件上設(shè)計(jì)并制作了與開發(fā)板匹配的接口板,軟件上在Tornado2.2環(huán)境中開發(fā)了Vx Works操作系統(tǒng)下適用于硬件的底層BSP,并開發(fā)頂層應(yīng)用程序,通過(guò)測(cè)試對(duì)串口、以太網(wǎng)、VME總線訪問、實(shí)時(shí)時(shí)鐘和看門狗等各個(gè)單元模塊進(jìn)行了驗(yàn)證。 全自主研發(fā)具有MVB接口的3U通信板卡,完成硬件設(shè)計(jì)和部分軟件設(shè)計(jì)：VME邏輯接口功能采用Verilog HDL硬件語(yǔ)言在FPGA上開發(fā),實(shí)現(xiàn)A16/D16模式數(shù)據(jù)交換；MVB網(wǎng)絡(luò)設(shè)備功能采用FPGA+NiosII軟核處理器的方式,移植了實(shí)驗(yàn)室自主研發(fā)的MVBC內(nèi)核,并在頂層設(shè)計(jì)了配合上位機(jī)對(duì)MVB網(wǎng)絡(luò)數(shù)據(jù)進(jìn)行讀寫的應(yīng)用程序。 在上述研究成果的基礎(chǔ)上,結(jié)合實(shí)驗(yàn)室現(xiàn)有的MVB設(shè)備進(jìn)行了符合現(xiàn)場(chǎng)應(yīng)用的電氣中距離的組網(wǎng)實(shí)驗(yàn)。根據(jù)通信設(shè)備實(shí)際需求,在VC++6.0環(huán)境下開發(fā)了基于以太網(wǎng)通信的上位機(jī)軟件。在實(shí)驗(yàn)中,使用上位機(jī)經(jīng)由主控單元對(duì)MVB網(wǎng)絡(luò)設(shè)備進(jìn)行配置,并通過(guò)VME總線讀寫網(wǎng)絡(luò)數(shù)據(jù),驗(yàn)證了方案可行性。 最后,總結(jié)了論文中所涉及工作的重點(diǎn)成果,指出了本系統(tǒng)中有待繼續(xù)完善的技術(shù)點(diǎn),并對(duì)列車網(wǎng)絡(luò)通信設(shè)備技術(shù)的發(fā)展趨勢(shì)進(jìn)行了展望。
[Abstract]:In order to monitor the operation of TCN in real time and reliably, the onboard computer is often set as the core of the actual train communication equipment. An embedded system is a system that controls, monitors or adjusts the operation of a device. It is a combination of software and hardware, and is suitable for functions and reliability such as the onboard computer application system. Special computer system with strict requirements for volume and power consumption. The development technology of train communication equipment in foreign countries is relatively mature, which has realized the combination of embedded on-board computer and TCN technology, and is forming a monopoly situation. However, the domestic research on this technology starts late, and its development and application are few, so it is necessary to build an experimental platform and develop the equipment products with independent intellectual property rights in order to enhance the international competitiveness and promote the construction of the train communication network in our country. VME bus is a board-level communication bus commonly used in embedded system. In order to realize the board level communication of VME, this paper sets up an interconnecting system between embedded computer and TCN network MVB layer, which makes the communication device have the function of MVB network interface. Because the MVB technology of the laboratory is mature, the research work mainly revolves around the embedded system master control unit and the VME bus interface. The main control unit of embedded system is based on Power PC processor MPC8245. The development board is redeveloped from the bottom up in the VxWorks operating system to meet the actual interface and function requirements of hardware and software. The interface board matching with the development board is designed and made on the hardware. In the software, the underlying BSPs suitable for the hardware under VX Works operating system are developed in the Tornado2.2 environment, and the top-level application program is developed. Through testing, the serial port, Ethernet and VME bus are accessed. The real-time clock and watchdog modules are verified. A 3U communication board with MVB interface is developed independently. The hardware design and part of software design are completed. The logic interface function of MVB is developed on FPGA with Verilog HDL hardware language. In order to realize the function of A16/D16 mode data exchange device, the FPGA NiosII soft core processor is used to transplant the MVBC kernel developed independently by the laboratory, and an application program is designed to read and write the MVB network data in cooperation with the host computer at the top level. On the basis of the above research results, combined with the existing MVB equipment in the laboratory, the electric middle distance networking experiment is carried out in accordance with the field application. According to the actual requirements of communication equipment, the upper computer software based on Ethernet communication is developed in VC 6.0 environment. In the experiment, the upper computer is used to configure the MVB network equipment through the master control unit, and the network data is read and written through the VME bus, which verifies the feasibility of the scheme. Finally, the paper summarizes the key achievements of the work involved in the paper, points out the technical points to be further improved in this system, and prospects the development trend of the train network communication equipment technology.
【學(xué)位授予單位】：北京交通大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2012
【分類號(hào)】：TP368.1;TN915.05

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本文編號(hào)：1933383