基于LXI總線架構(gòu)的自動(dòng)化IC測(cè)試系統(tǒng)軟件設(shè)計(jì)
本文選題:LXI + 嵌入式系統(tǒng) ; 參考:《北京交通大學(xué)》2012年碩士論文
【摘要】:近年來(lái),隨著電子產(chǎn)業(yè)的蓬勃發(fā)展,嵌入式系統(tǒng)被應(yīng)用到越來(lái)越多的領(lǐng)域,市場(chǎng)需求日益擴(kuò)大。嵌入式系統(tǒng)可以被定義為“以應(yīng)用為中心、以計(jì)算機(jī)技術(shù)為基礎(chǔ)、軟件硬件可裁剪、適應(yīng)應(yīng)用系統(tǒng)對(duì)功能、可靠性、成本、體積、功耗嚴(yán)格要求的專用計(jì)算機(jī)系統(tǒng)”。嵌入式系統(tǒng)是面向應(yīng)用的,它必須與具體應(yīng)用相結(jié)合才會(huì)具有生命力。將先進(jìn)的網(wǎng)絡(luò)技術(shù)與嵌入式系統(tǒng)相結(jié)合,應(yīng)用到IC測(cè)試系統(tǒng)中,必然會(huì)顯著的提高系統(tǒng)遠(yuǎn)程控制能力,簡(jiǎn)化系統(tǒng)總線結(jié)構(gòu)。使測(cè)試系統(tǒng)的功能、應(yīng)用范圍得到極大的擴(kuò)展。 總線是一組信號(hào)線的集合,是系統(tǒng)中各功能部件間進(jìn)行信息傳輸?shù)墓餐ǖ。在測(cè)試系統(tǒng)中,總線發(fā)揮重要的作用。LXI總線標(biāo)準(zhǔn)將以太網(wǎng)標(biāo)準(zhǔn)、接口標(biāo)準(zhǔn)、觸發(fā)標(biāo)準(zhǔn)、物理標(biāo)準(zhǔn)和網(wǎng)絡(luò)標(biāo)準(zhǔn)整合在一起,滿足了測(cè)試系統(tǒng)對(duì)系統(tǒng)建立時(shí)間、系統(tǒng)尺寸、傳輸能力、通用性等方面更高的要求,是繼GPIB. VXI、PXI之后全新一代的總線標(biāo)準(zhǔn)。 本課題致力于開發(fā)基于LXI總線的自動(dòng)化IC測(cè)試系統(tǒng),目標(biāo)是開發(fā)出低成本、低能耗、高性能、配置簡(jiǎn)便靈活,基于工業(yè)以太網(wǎng)的解決方案。 本文測(cè)試系統(tǒng)的設(shè)計(jì)嚴(yán)格遵循LXI總線C類標(biāo)準(zhǔn),經(jīng)過(guò)分析比較國(guó)內(nèi)外測(cè)試技術(shù)的發(fā)展趨勢(shì)和特點(diǎn),確立以業(yè)內(nèi)成熟的分布式系統(tǒng),實(shí)現(xiàn)方式采用“上位機(jī)+下位機(jī)”的模型。在此基礎(chǔ)上,本文著重進(jìn)行了以下的幾方面工作: 1.根據(jù)嵌入式硬件資源移植嵌入式實(shí)時(shí)操作系統(tǒng)μC/OS-II,并根據(jù)功能要求對(duì)μC/OS-II操作系統(tǒng)進(jìn)行適當(dāng)?shù)募舨谩?2.開發(fā)了網(wǎng)絡(luò)傳輸功能模塊,在μC/OS-II操作系統(tǒng)上建立TCP/IP協(xié)議棧,達(dá)到了LXI C類標(biāo)準(zhǔn)的要求。 3.開發(fā)了嵌入式應(yīng)用軟件,包括網(wǎng)絡(luò)套接字程序和各測(cè)試模塊的控制程序。 4.開發(fā)了遠(yuǎn)程計(jì)算機(jī)中的網(wǎng)絡(luò)虛擬儀器界面,滿足了遠(yuǎn)程控制測(cè)試系統(tǒng)的要求。 實(shí)驗(yàn)結(jié)果表明,基于LXI總線的自動(dòng)化IC測(cè)試系統(tǒng)實(shí)現(xiàn)了模擬、數(shù)字?jǐn)?shù)據(jù)的實(shí)時(shí)采集,并能通過(guò)LXI總線工業(yè)以太網(wǎng)準(zhǔn)確、實(shí)時(shí)的將數(shù)據(jù)發(fā)送到計(jì)算機(jī)。相比傳統(tǒng)測(cè)試總線在傳輸速度、系統(tǒng)容量和成本等方面有極大提升,系統(tǒng)靈活的拓?fù)浣Y(jié)構(gòu)和豐富的擴(kuò)展接口為未來(lái)實(shí)現(xiàn)大規(guī)模網(wǎng)絡(luò)化測(cè)試系統(tǒng)提供了可能。 文中共有圖16幅,表10個(gè),參考文獻(xiàn)32篇。
[Abstract]:In recent years, with the rapid development of electronic industry, embedded system has been applied to more and more fields, and the market demand is expanding day by day. Embedded systems can be defined as "application-centric, computer technology-based, software and hardware can be tailored to the application system to function, reliability, cost, volume, power consumption strict requirements of the dedicated computer system." Embedded system is application-oriented, it must be combined with specific applications to have vitality. The application of advanced network technology and embedded system to IC test system will improve the remote control ability of the system and simplify the system bus structure. The function and application range of the test system are greatly expanded. Bus is a collection of signal lines and a common channel for information transmission between functional components of the system. In the test system, bus plays an important role. LXI bus standard integrates Ethernet standard, interface standard, trigger standard, physical standard and network standard. Transmission capacity, versatility and other aspects of the higher requirements, is a GPIBB. VXI PXI after the new generation of bus standards. This paper is devoted to the development of an automatic IC test system based on LXI bus. The goal is to develop a solution based on industrial Ethernet with low cost, low energy consumption, high performance, simple and flexible configuration. The design of the test system in this paper strictly conforms to the class C standard of LXI bus. After analyzing and comparing the development trend and characteristics of the test technology at home and abroad, the model of "upper computer and lower computer" is established with the mature distributed system in the industry. On this basis, this paper focuses on the following aspects of work: 1. According to the embedded hardware resources, the embedded real-time operating system 渭 C / OS-IIs is transplanted, and the 渭 C/OS-II operating system is tailored according to the functional requirements. 2. The function module of network transmission is developed, and the TCP/IP protocol stack is built on 渭 C/OS-II operating system, which meets the requirements of LXI C standard. 3. The embedded application software is developed, including the network socket program and the control program of each test module. 4. The network virtual instrument interface in remote computer is developed to meet the requirements of remote control test system. The experimental results show that the automatic IC test system based on LXI bus can realize the real-time acquisition of analog and digital data, and can send the data to the computer in real time through the LXI bus industrial Ethernet. Compared with the traditional test bus, the transmission speed, system capacity and cost are greatly improved. The flexible topology of the system and the rich extended interface make it possible to realize the large-scale networked test system in the future. There are 16 pictures, 10 tables and 32 references.
【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;TN407
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