USB接口控制器參考設(shè)計(jì),xilinx提供VHDL代碼 usb xilinx vhdl ; This program is free software; you can redistribute it and/or modify ; it under the terms of the GNU General Public License as published by ; the Free Software Foundation; either version 2 of the License, or ; (at your option) any later version. ; ; This program is distributed in the hope that it will be useful, ; but WITHOUT ANY WARRANTY; without even the implied warranty of ; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the ; GNU General Public License for more details. ; ; You should have received a copy of the GNU General Public License ; along with this program; if not, write to the Free Software ; Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
上傳時(shí)間： 2013-10-12
上傳用戶：windgate
針對(duì)UHF讀寫器設(shè)計(jì)中，在符合EPC Gen2標(biāo)準(zhǔn)的情況下，對(duì)標(biāo)簽返回的高速數(shù)據(jù)進(jìn)行正確解碼以達(dá)到正確讀取標(biāo)簽的要求，提出了一種新的在ARM平臺(tái)下采用邊沿捕獲統(tǒng)計(jì)定時(shí)器數(shù)判斷數(shù)據(jù)的方法，并對(duì)FM0編碼進(jìn)行解碼。與傳統(tǒng)的使用定時(shí)器定時(shí)采樣高低電平的FM0解碼方法相比，該解碼方法可以減少定時(shí)器定時(shí)誤差累積的影響；可以將捕獲定時(shí)器數(shù)中斷與數(shù)據(jù)判斷解碼相對(duì)分隔開，使得中斷對(duì)解碼影響很小，實(shí)現(xiàn)捕獲與解碼的同步。通過實(shí)驗(yàn)表明，這種方法提高了解碼的效率，在160 Kb/s的接收速度下，讀取一張標(biāo)簽的時(shí)間約為30次/s。 Abstract: Aiming at the requirement of receiving correctly decoded data from the tag under high-speed communication which complied with EPC Gen2 standard in the design of UHF interrogator， the article introduced a new technology for FM0 decoding which counted the timer counter to judge data by using the edge interval of signal capture based on the ARM7 platform. Compared with the traditional FM0 decoding method which used the timer timed to sample the high and low level， the method could reduce the accumulation of timing error and could relatively separate capture timer interrupt and the data judgment for decoding， so that the disruption effect on the decoding was small and realizd synchronization of capture and decoding. Testing result shows that the method improves the efficiency of decoding， at 160 Kb/s receiving speed， the time of the interrogator to read a tag is about 30 times/s.
標(biāo)簽： UHF FM0 讀寫器 解碼技術(shù)
上傳時(shí)間： 2013-11-10
上傳用戶：liufei
C++在幾乎所有的計(jì)算環(huán)境中都非常普及，而且可以用于幾乎所有的應(yīng)用程序。C++從C中繼承了過程化編程的高效性，并集成了面向?qū)ο缶幊痰墓δ堋++在其標(biāo)準(zhǔn)庫中提供了大量的功能。有許多商業(yè)C++庫支持?jǐn)?shù)量眾多的操作系統(tǒng)環(huán)境和專業(yè)應(yīng)用程序。但因?yàn)樗膬?nèi)容太多了，所以掌握C++并不十分容易。本書詳述了C++語言的各個(gè)方面，包括數(shù)據(jù)類型、程序控制、函數(shù)、指針、調(diào)試、類、重載、繼承、多態(tài)性、模板、異常和輸入輸出等內(nèi)容。每一章都以前述內(nèi)容為基礎(chǔ)，每個(gè)關(guān)鍵點(diǎn)都用具體的示例進(jìn)行詳細(xì)的講解。本書基本不需要讀者具備任何C++知識(shí)，書中包含了理解C++的所有必要知識(shí)，讀者可以從頭開始編寫自己的C++程序。本書也適合于具備另一種語言編程經(jīng)驗(yàn)但希望全面掌握C++語言的讀者。 I created all the files under Microsoft Windows so lines are terminated by CR/LF. In addition to this "ReadMe" file you will find three zip archives in the primary archive, so you need to unzip each of these to get at the code. 為PDG格式,這有pdg閱讀器下載|pdg文件閱讀器下載
標(biāo)簽： 源代碼
上傳時(shí)間： 2013-11-18
上傳用戶：gaoqinwu
The introduction of Spartan-3™ devices has createdmultiple changes in the evolution of embedded controldesigns and pushed processing capabilities to the “almostfreestage.” With these new FPGAs falling under $20, involume, with over 1 million system gates, and under $5for 100K gate-level units, any design with programmablelogic has a readily available 8- or 16-bit processor costingless than 75 cents and 32-bit processor for less than $1.50.
上傳時(shí)間： 2013-10-21
上傳用戶：ligi201200
This document was developed under the Standard Hardware and Reliability Program (SHARP) TechnologyIndependent Representation of Electronic Products (TIREP) project. It is intended for use by VHSIC HardwareDescription Language (VHDL) design engineers and is offered as guidance for the development of VHDL modelswhich are compliant with the VHDL Data Item Description (DID DI-EGDS-80811) and which can be providedto manufacturing engineering personnel for the development of production data and the subsequent productionof hardware. Most VHDL modeling performed to date has been concentrated at either the component level orat the conceptual system level. The assembly and sub-assembly levels have been largely disregarded. Under theSHARP TIREP project, an attempt has been made to help close this gap. The TIREP models are based upon lowcomplexity Standard Electronic Modules (SEM) of the format A configuration. Although these modules are quitesimple, it is felt that the lessons learned offer guidance which can readily be applied to a wide range of assemblytypes and complexities.
標(biāo)簽： Modelling Guide Navy VHDL
上傳時(shí)間： 2013-11-20
上傳用戶：pzw421125
USB接口控制器參考設(shè)計(jì),xilinx提供VHDL代碼 usb xilinx vhdl ; This program is free software; you can redistribute it and/or modify ; it under the terms of the GNU General Public License as published by ; the Free Software Foundation; either version 2 of the License, or ; (at your option) any later version. ; ; This program is distributed in the hope that it will be useful, ; but WITHOUT ANY WARRANTY; without even the implied warranty of ; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the ; GNU General Public License for more details. ; ; You should have received a copy of the GNU General Public License ; along with this program; if not, write to the Free Software ; Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
上傳時(shí)間： 2013-10-29
上傳用戶：zhouchang199
Semiconductor memory, card readers, microprocessors,disc drives, piezoelectric devices and digitally based systemsfurnish transient loads that a voltage regulator mustservice. Ideally, regulator output is invariant during a loadtransient. In practice, some variation is encountered andbecomes problematic if allowable operating voltage tolerancesare exceeded. This mandates testing the regulatorand its associated support components to verify desiredperformance under transient loading conditions. Variousmethods are employable to generate transient loads, allowingobservation of regulator response
標(biāo)簽： 如何測(cè)試 穩(wěn)壓器 瞬態(tài)響應(yīng) 負(fù)載
上傳時(shí)間： 2013-11-21
上傳用戶：semi1981
Abstract: The reality of modern, small form-factor ceramic capacitors is a good reminder to always readthe data sheet. This tutorial explains how ceramic capacitor type designations, such as X7R and Y5V,imply nothing about voltage coefficients. Engineers must check the data to know, really know, how aspecific capacitor will perform under voltage.
上傳時(shí)間： 2013-11-04
上傳用戶：梧桐
There are many manufacturers of dot matrix LCD modules. However, most of these displaysare similar. They all have on-board controllers and drivers capable of displaying alpha numericsand a wide variety of other symbols (including Japanese "Katakana" characters). The internaloperation of LCD controller devices is determined by signals sent from a central processing unit(in this case, a CoolRunner-II CPLD).
標(biāo)簽： CoolRunner-II XAPP 904 LCD
上傳時(shí)間： 2013-12-17
上傳用戶：haiya2000
XMail is an Internet and intranet mail server featuring an SMTP server, POP3 server, finger server, multiple domains, no need for users to have a real system account, SMTP relay checking, RBL/RSS/ORBS/DUL and custom ( IP based and address based ) spam protection, SMTP authentication ( PLAIN LOGIN CRAM-MD5 POP3-before-SMTP and custom ), a POP3 account syncronizer with external POP3 accounts, account aliases, domain aliases, custom mail processing, direct mail files delivery, custom mail filters, mailing lists, remote administration, custom mail exchangers, logging, and multi-platform code. XMail sources compile under GNU/Linux, FreeBSD, OpenBSD, NetBSD, OSX, Solaris and NT/2K/XP.
標(biāo)簽： server featuring Internet intranet
上傳時(shí)間： 2015-01-12
上傳用戶：asddsd
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