發(fā)布時(shí)間：2018-03-31 03:36

  本文選題：車聯(lián)網(wǎng)　切入點(diǎn)：嵌入式以太網(wǎng)　出處：《中國(guó)科學(xué)技術(shù)大學(xué)》2014年碩士論文

【摘要】：由于電子技術(shù)、通信技術(shù)、傳感器技術(shù)、自動(dòng)控制技術(shù)在汽車中的廣泛應(yīng)用,汽車電子的規(guī)模不斷擴(kuò)大,功能日益增強(qiáng),進(jìn)而對(duì)車內(nèi)通信網(wǎng)絡(luò)總線的要求不斷提高。以太網(wǎng)技術(shù)以其統(tǒng)一的網(wǎng)絡(luò)標(biāo)準(zhǔn)(TCP/IP),較高的數(shù)據(jù)傳輸率,獲得汽車電子、通信以及控制界的廣泛重視,因此有必要研究并實(shí)現(xiàn)車載環(huán)境下實(shí)時(shí)性好、性能穩(wěn)定、可靠性高的以太網(wǎng)技術(shù)。車載信息系統(tǒng)、電子控制系統(tǒng)和傳感器單元越來(lái)越頻繁地與外部網(wǎng)絡(luò)進(jìn)行信息交互,此外,未來(lái)車載以太網(wǎng)作為汽車的骨干網(wǎng)絡(luò),必定存在網(wǎng)絡(luò)信息安全的風(fēng)險(xiǎn)。在汽車網(wǎng)絡(luò)環(huán)境中,由于信息安全防范脆弱,但對(duì)于安全性又有非常高的要求,車載信息系統(tǒng)的安全問(wèn)題必須引起足夠的重視。 本文針對(duì)未來(lái)車在網(wǎng)絡(luò)發(fā)展需求,研究車載嵌入式以太網(wǎng)通信系統(tǒng)的實(shí)現(xiàn),包括硬件系統(tǒng)設(shè)計(jì)制作、軟件系統(tǒng)移植與開(kāi)發(fā)、系統(tǒng)測(cè)試,特別是嵌入式系統(tǒng)的信息安全實(shí)現(xiàn)。 以瑞薩電子32位微控制器RX62N為核心,設(shè)計(jì)并實(shí)現(xiàn)嵌入式系統(tǒng)硬件平臺(tái)。包括以太網(wǎng)通信模塊、通過(guò)SPI總線配置和控制的LCD液晶屏模塊、通過(guò)IIC總線配置和讀取溫度傳感器、CAN通信以及JTAG調(diào)試接口等設(shè)計(jì)與電路實(shí)現(xiàn)。 完成μC/OS-Ⅱ和μC/TCP-IP協(xié)議的移植,通過(guò)開(kāi)發(fā)以太網(wǎng)控制器的驅(qū)動(dòng),實(shí)現(xiàn)嵌入式以太網(wǎng)通信。μc/OS-Ⅱ的移植工作是實(shí)現(xiàn)與RX62N微控制器相關(guān)的匯編代碼。μC/TCP-IP協(xié)議的移植工作是根據(jù)協(xié)議架構(gòu),開(kāi)發(fā)設(shè)備驅(qū)動(dòng)層代碼,實(shí)現(xiàn)基于DMA描述符和中斷信號(hào)量任務(wù)機(jī)制的網(wǎng)絡(luò)數(shù)據(jù)包接收和發(fā)送。通過(guò)以太網(wǎng)DMA傳輸,可以極大的提高網(wǎng)絡(luò)數(shù)據(jù)包的傳輸率。完成嵌入式以太網(wǎng)通信的系統(tǒng)測(cè)試。通過(guò)DHCPc協(xié)議和TCP Client-Server套接字應(yīng)用程序從功能上進(jìn)行測(cè)試；通過(guò)代碼量和內(nèi)存空間的使用分析,以及對(duì)字節(jié)長(zhǎng)度不同的數(shù)據(jù)包平均往返時(shí)間進(jìn)行統(tǒng)計(jì),從性能上進(jìn)行測(cè)試。 研究嵌入式以太網(wǎng)信息安全技術(shù),并實(shí)現(xiàn)了部分IPsec協(xié)議代碼的移植和功能測(cè)試。IPsec協(xié)議是通過(guò)認(rèn)證頭(AH)協(xié)議和安全封裝載荷(ESP)協(xié)議保護(hù)數(shù)據(jù)通信的完整性、機(jī)密性和可靠性。與其他信息安全系統(tǒng)測(cè)試一樣,嵌入式以太網(wǎng)信息安全測(cè)試難度很大,本文僅測(cè)試了已經(jīng)在軟件部分實(shí)現(xiàn)的AH和ESP協(xié)議功能代碼的正確性。
[Abstract]:As electronic technology, communication technology, sensor technology, automatic control technology is widely used in automobile, automobile electronics continues to expand the scale of function increasing, so the demand of car bus communication network continues to improve. Ethernet technology with unified network standard (TCP/IP), high data transmission rate, get in the car electronic, communication and wide attention in control field, so it is necessary to research and implementation of vehicle environment real-time, stable performance, high reliability of Ethernet technology. The vehicle information system, electronic control system and sensor unit more and more frequently with the external network for information exchange, in addition, the future of automotive Ethernet as the backbone network of car. There must be a risk of network information security. In the network environment, the information security vulnerability, but for safety and has a very high demand, vehicle signal The security problem of information system must be paid enough attention.
According to the development needs of future car in the network, realize the embedded Ethernet communication system research, including the design of hardware system, software system transplantation and development, system testing, especially in information security of embedded system.
With Renesas electronics 32 bit microcontroller RX62N as the core, the design and implementation of embedded system hardware platform including the Ethernet communication module, LCD LCD module through SPI bus configuration and control, through the IIC bus configuration and read the temperature sensor, design and implementation of CAN communication and JTAG debugging interface.
Complete the C/OS- II and C/TCP-IP protocol, through the Ethernet controller driver development, implementation of Embedded Ethernet communication. C/OS- II transplant is to achieve the compilation of code associated with the RX62N micro controller. C/TCP-IP protocol work is based on the protocol architecture, the development of device driver layer code, DMA network data descriptors and the amount of interrupt signal receiving and transmitting the packet task mechanism based on DMA. Through the Ethernet transmission, can greatly improve the data transmission rate of network packets. The completion of system testing of Embedded Ethernet communication. Through the DHCPc protocol and TCP Client-Server socket applications from the function test; through the use of code size and memory space analysis, and on different byte length packets average round-trip time statistics, from the performance test.
The research of Embedded Ethernet technology in information security, and realizes the transplantation and functional testing of.IPsec protocol IPsec protocol code is through the authentication header (AH) protocol and the encapsulating security payload (ESP) protocol to protect the integrity of data communication, confidentiality and reliability. As with other information security test system, embedded Ethernet information security test great difficulty in this paper, only has tested in the software part of the realization of the AH protocol and ESP function of the correctness of the code.

【學(xué)位授予單位】：中國(guó)科學(xué)技術(shù)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：U463.6;TP393.11

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