本文關(guān)鍵詞： TCL 信號(hào)完整性 PCB文件格式 腳本語(yǔ)言 數(shù)據(jù)庫(kù)　出處：《西安電子科技大學(xué)》2015年碩士論文　論文類(lèi)型：學(xué)位論文

【摘要】：進(jìn)入21世紀(jì)以來(lái),由于電子產(chǎn)業(yè)迅速發(fā)展,半導(dǎo)體工藝水平不斷提高,因此器件的尺寸越來(lái)越小,導(dǎo)致PCB的集成度越來(lái)越高,PCB設(shè)計(jì)也越來(lái)越復(fù)雜,設(shè)計(jì)師工作量加大。隨著時(shí)鐘頻率的提高,信號(hào)完整性問(wèn)題越來(lái)越明顯,增加了電路板設(shè)計(jì)難度。對(duì)于時(shí)鐘頻率比較低的電路系統(tǒng),不需要考慮信號(hào)完整性問(wèn)題,設(shè)計(jì)師完全可以根據(jù)自己的經(jīng)驗(yàn)對(duì)電路系統(tǒng)進(jìn)行人工審查,以確保設(shè)計(jì)的正確性。但是對(duì)于高速PCB版圖,一方面設(shè)計(jì)師無(wú)法根據(jù)經(jīng)驗(yàn)對(duì)版圖進(jìn)行人工審查,另一方面,高集成度的復(fù)雜PCB設(shè)計(jì)是設(shè)計(jì)師無(wú)法進(jìn)行人工審查的又一障礙。因此,需要借助計(jì)算機(jī)來(lái)輔助審查PCB版圖。目前市場(chǎng)上的PCB設(shè)計(jì)軟件種類(lèi)繁多,它們生成的PCB文件格式各不相同。不同的設(shè)計(jì)軟件之間無(wú)法進(jìn)行數(shù)據(jù)交換。為了消除這種隔閡,我們選取了一種流行的PCB文件格式—ODB++文件格式,大多數(shù)PCB設(shè)計(jì)軟件都能導(dǎo)出這種格式的文件。我們?yōu)镻LV軟件開(kāi)發(fā)了導(dǎo)入ODB++文件的接口,使得不同PCB設(shè)計(jì)軟件設(shè)計(jì)的不同PCB版圖都可以在PLV軟件中進(jìn)行審查。PLV的審查模塊主要由三部分構(gòu)成:數(shù)據(jù)庫(kù)模塊、TCL腳本編輯模塊和TCL腳本執(zhí)行模塊。用TCL語(yǔ)言編寫(xiě)規(guī)則腳本來(lái)實(shí)現(xiàn)審查相對(duì)比較靈活,并且可以隨時(shí)對(duì)腳本規(guī)則進(jìn)行編輯。TCL語(yǔ)言和C++相結(jié)合,使得審查更高效、更方便。PLV軟件提供給用戶(hù)腳本編輯器,便于用戶(hù)在PLV軟件中編寫(xiě)、調(diào)試腳本。TCL的腳本執(zhí)行模塊是用來(lái)執(zhí)行規(guī)則腳本的。為了實(shí)現(xiàn)該功能,需要將TCL嵌入到PLV應(yīng)用程序中,這是通過(guò)TCL庫(kù)的動(dòng)態(tài)鏈接庫(kù)實(shí)現(xiàn)的。PLV中的數(shù)據(jù)庫(kù)模塊包括本地?cái)?shù)據(jù)庫(kù)和服務(wù)器數(shù)據(jù)庫(kù)。它支持用戶(hù)將自己編寫(xiě)的規(guī)則腳本保存到本地?cái)?shù)據(jù)庫(kù)或者上傳到服務(wù)器數(shù)據(jù)庫(kù)。服務(wù)器數(shù)據(jù)庫(kù)可以保存不同用戶(hù)上傳的規(guī)則腳本。用戶(hù)之間可以通過(guò)服務(wù)器數(shù)據(jù)庫(kù)共享規(guī)則腳本。用戶(hù)也可以從服務(wù)器數(shù)據(jù)庫(kù)下載自己需要的規(guī)則腳本,來(lái)實(shí)現(xiàn)自己的審查。PLV軟件不僅能完成設(shè)計(jì)規(guī)則審查,它還可以對(duì)信號(hào)完整性進(jìn)行審查。PLV軟件主要對(duì)單一網(wǎng)絡(luò)的反射和多網(wǎng)絡(luò)間的串?dāng)_進(jìn)行審查。用戶(hù)應(yīng)該將盡可能多的設(shè)計(jì)規(guī)則腳本添加到服務(wù)器數(shù)據(jù)庫(kù)中,這樣積少成多,不僅會(huì)使PLV軟件的審查功能越來(lái)越強(qiáng)大,而且也使得信號(hào)完整性的審查規(guī)則庫(kù)越來(lái)越豐富,能進(jìn)行更多更強(qiáng)大的性能審查。
[Abstract]:Since 21th century, due to the rapid development of the electronic industry and the continuous improvement of semiconductor technology, the size of the device becomes smaller and smaller, which leads to the more and more integrated PCB design. With the increase of clock frequency, the problem of signal integrity becomes more and more obvious, which makes the design of circuit board more difficult. For circuit system with low clock frequency, the problem of signal integrity does not need to be considered. Designers can manually review circuit systems according to their own experience to ensure the correctness of the design. But for high-speed PCB layout, on the one hand, designers can not manually review the layout based on experience, on the other hand, High integration of complex PCB design is another obstacle that designers can't carry out manual review. Therefore, it is necessary to use computer to assist in reviewing PCB layout. There are many kinds of PCB design software in the market at present. They produce different PCB file formats. Different design software can't exchange data. To overcome this gap, we chose a popular PCB file format -ODB file format. Most PCB design software can export files in this format. We have developed an interface for PLV software to import ODB files. The different PCB layout designed by different PCB design software can be examined in PLV software. The review module consists of three parts: the database module and the TCL script editing module and the TCL script execution module. The module is written in TCL language and is composed of three parts: the database module and the TCL script execution module, which are composed of three parts: the database module and the TCL script execution module. Writing regular scripts to implement censorship is relatively flexible, And can edit the script rules at any time. TCL language and C combination, make the review more efficient, more convenient. PLV software to provide the user script editor, easy for users to write in the PLV software, The script execution module of the debug script. TCL is used to execute rule scripts. To do this, you need to embed TCL into your PLV application. This database module in. PLV, implemented through the dynamic link library of the TCL library, includes both local and server databases. It allows users to save their own rule scripts to a local database or upload to the number of servers. According to library. Server database can hold rules scripts uploaded by different users. Users can share rule scripts through server database. Users can also download their required rule scripts from server database. To implement their own review. PLV software can not only complete the design rules review, It can also review signal integrity. PLV software mainly reviews the reflection of a single network and crosstalk between multiple networks. Users should add as many design rule scripts as possible to the server database. Not only will the PLV software audit function become more and more powerful, but also the signal integrity review rule base will be more and more abundant, and it will be able to conduct more and more powerful performance review.
【學(xué)位授予單位】：西安電子科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類(lèi)號(hào)】：TN41;TP311.52

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