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  • S3C2410完全開發(fā)流程與源碼

    本書面向由傳統(tǒng)51單片機(jī)轉(zhuǎn)向ARM嵌入式開發(fā)的硬件工程師、由硬件轉(zhuǎn)嵌入式軟件開發(fā)的工程師、沒有嵌入式開發(fā)經(jīng)驗(yàn)的軟件工程師。分9個(gè)部分:1、開發(fā)環(huán)境建立2、S3C2410功能部件介紹與實(shí)驗(yàn)(含實(shí)驗(yàn)代碼)3、bootloader vivi詳細(xì)注釋4、linux移植5、linux驅(qū)動(dòng)6、yaffs文件系統(tǒng)詳解7、調(diào)試工具8、GUI開發(fā)簡介9、UC/OS移植通過學(xué)習(xí)第二部分,即可了解基于ARM CPU的嵌入式開發(fā)所需要的外圍器件及其接口。對(duì)應(yīng)的實(shí)驗(yàn)代碼實(shí)現(xiàn)了對(duì)這些接口的操作,這可以讓硬件工程師形成一個(gè)嵌入式硬件開發(fā)的概念。這部分也可以當(dāng)作S3C2410的數(shù)據(jù)手冊(cè)來使用。一個(gè)完整的嵌入式linux系統(tǒng)包含4部分內(nèi)容:bootloader、parameters、kernel、root file system。3、4、5、6部分詳細(xì)介紹了這4部分的內(nèi)容,這是linux底層軟件開發(fā)人員應(yīng)該掌握的。通過學(xué)習(xí)這些章節(jié),您可以詳細(xì)了解到如何在一個(gè)裸板上裁減、移植linux,如何構(gòu)造自己的根文件系統(tǒng),如何編寫適合客戶需求的驅(qū)動(dòng)程序——驅(qū)動(dòng)程序這章將結(jié)合幾個(gè)經(jīng)典的驅(qū)動(dòng)程序進(jìn)行講解。您還可以了解到在用在nand flash上的非常流行的yaffs文件系統(tǒng)是如何工作的,本書將結(jié)合yaffs代碼詳細(xì)介紹yaffs文件系統(tǒng)。第7部分介紹了嵌入式linux開發(fā)中使用gdb進(jìn)行調(diào)試的詳細(xì)過程。

    標(biāo)簽: S3C2410 開發(fā)流程 源碼

    上傳時(shí)間: 2013-10-31

    上傳用戶:yunfan1978

  • 基于C8051F930的管道溫度壓力遠(yuǎn)程監(jiān)測系統(tǒng)

       為解決輸油管道溫度壓力參數(shù)實(shí)時(shí)監(jiān)測的問題,設(shè)計(jì)了以C8051F930單片機(jī)作為控制核心的超低功耗輸油管道溫度壓力遠(yuǎn)程監(jiān)測系統(tǒng)。現(xiàn)場儀表使用高精度電橋采集數(shù)據(jù),通過433 MHz短距離無線通信網(wǎng)絡(luò)與遠(yuǎn)程終端RTU進(jìn)行通信,RTU通過GPRS網(wǎng)絡(luò)與PC上位機(jī)進(jìn)行遠(yuǎn)程數(shù)據(jù)傳輸,在上位機(jī)中實(shí)現(xiàn)數(shù)據(jù)存儲(chǔ)和圖形化界面顯示,從而實(shí)現(xiàn)輸油管道溫度壓力參數(shù)的實(shí)時(shí)監(jiān)測和異常報(bào)警。經(jīng)實(shí)驗(yàn)證明,該系統(tǒng)的12位數(shù)據(jù)采集精度滿足設(shè)計(jì)要求,漏碼率小于1%,正常工作時(shí)間超過5個(gè)月,能實(shí)時(shí)有效地監(jiān)測輸油管道的溫度壓力參數(shù),節(jié)省大量人工成本,有效預(yù)防管道參數(shù)異常造成的經(jīng)濟(jì)損失和環(huán)境污染。 Abstract:  In order to solve the problems on real-time monitoring of pipeline temperature and pressure parameters, the ultra-low power remote pipeline temperature and pressure monitoring system was designed by using the single chip processor C8051F930 as the control core. The high-precision electric bridge was used in field instruments for data collection, the 433MHz short-range wireless communication network was used to make communication between field instrument and RTU, the GPRS was used by the RTU to transmit data to the PC host computer, and the data was stored and displayed in the PC host computer, so the real-time monitoring and exception alerts of pipeline temperature and pressure parameters were achieved. The experiment proves that the system of which error rate is less than 1% over five months working with the 12-bit data acquisition accuracy can effectively monitor the pipeline temperature and pressure parameters in real time, it saves a lot of labor costs and effectively prevents environmental pollution and economic losses caused by abnormal channel parameters.

    標(biāo)簽: C8051F930 溫度 壓力 遠(yuǎn)程監(jiān)測系統(tǒng)

    上傳時(shí)間: 2013-11-07

    上傳用戶:cuibaigao

  • 高壓雙管反激變換器的設(shè)計(jì)

    高壓雙管反激變換器的設(shè)計(jì):介紹一種雙管反激的電路拓?fù)洌治隽似涔ぷ髟恚o出了一些關(guān)鍵技術(shù)參數(shù)的計(jì)算公式,設(shè)計(jì)并研制成功的30W 380V AC5 0H z/510V DC/+15.1 V DC(1A )、+5.2VDC(2A)輔助開關(guān)電源具有功率密度高、變換效率高、可靠性高等優(yōu)良的綜合性能。該變換器在高電壓輸人情況下有重要的應(yīng)用價(jià)值。【關(guān) 鍵 詞 】變換器,輔助開關(guān)電源,雙管反激 [Abstract】 A n e wt opologyfo rd oubles witchfl ybackc onverteris in troduced.Th eo perationp rincipleis a nalyzeda nds ome for mulas for calculating key parameters for the topology are presented. The designed and produced auxiliary switching power supply,i. e. 30W 380V AC5 0H z/5 10V DC/+15.1 V DC《1A )、+5.2 V DC《2A ),hase xcellentc omprehensivep erformances sucha sh ighp owerd ensity, hi ghc onversione fficiencya ndh ighr eliability.Th isc onverterh asim portanta pplicationv aluef orh igh input voltag [Keywords ]converter,au xiliary switchingp owers upply,do ubles witchf lybac

    標(biāo)簽: 雙管反激 變換器

    上傳時(shí)間: 2013-11-01

    上傳用戶:Ants

  • MPC106 PCI橋/存儲(chǔ)器控制器硬件規(guī)范說明

    The Motorola MPC106 PCI bridge/memory controller provides a PowerPCªmicroprocessor common hardware reference platform (CHRPª) compliant bridgebetween the PowerPC microprocessor family and the Peripheral Component Interconnect(PCI) bus. In this document, the term Ô106Õ is used as an abbreviation for the phraseÔMPC106 PCI bridge/memory controllerÕ. This document contains pertinent physicalcharacteristics of the 106. For functional characteristics refer to theMPC106 PCI Bridge/Memory Controller UserÕs Manual.This document contains the following topics:Topic PageSection 1.1, ÒOverviewÓ 2Section 1.2, ÒFeaturesÓ 3Section 1.3, ÒGeneral parametersÓ 5Section 1.4, ÒElectrical and Thermal CharacteristicsÓ 5Section 1.5, ÒPin AssignmentsÓ 17Section 1.6, ÒPinout Listings 18Section 1.7, ÒPackage DescriptionÓ 22Section 1.8, ÒSystem Design InformationÓ 24Section 1.9, ÒDocument Revision HistoryÓ 29Section 1.10, ÒOrdering InformationÓ 29

    標(biāo)簽: MPC 106 PCI 存儲(chǔ)器

    上傳時(shí)間: 2013-11-04

    上傳用戶:as275944189

  • 帶通濾波器設(shè)計(jì)計(jì)算

    摘 要:用一種新的思路和方法,先計(jì)算低通、再計(jì)算高通濾波器的有關(guān)參數(shù),然后組合成帶通濾波器.關(guān)鍵詞:濾波器;參數(shù);新思路中圖分類號(hào): TN713. 5  文獻(xiàn)識(shí)別碼:B  文章編號(hào):1008 - 1666 (1999) 04 - 0089 - 03A New Consideration of the Band Filter’s CalculationGuo Wencheng( S hao Yang B usiness and Technology school , S haoyang , Hunan ,422000 )Abstract :This essay deals with a new method of calculating the band filters - first calculatingthe relevant parameters of low - pass filters ,then calculating the ones of high - pass filters.Key words :filter ; parameters ;new considercation八十年代后,信息產(chǎn)業(yè)得到了迅猛發(fā)展. 帶通濾波器在微波通信、廣播電視和精密儀器設(shè)備中得到了廣泛應(yīng)用. 帶通濾波器性能的優(yōu)劣,對(duì)提高接收機(jī)信噪比,防止鄰近信道干擾,提高設(shè)備的技術(shù)指標(biāo),有著十分重要的意義.我在長期的教學(xué)實(shí)踐中,用切比雪夫型方法設(shè)計(jì)、計(jì)算出寬帶濾波器集中參數(shù)元件的數(shù)據(jù). 該濾波器可運(yùn)用在檢測微波頻率的儀器和其他設(shè)備中. 再將其思路和計(jì)算方法介紹給大家,供參考.

    標(biāo)簽: 帶通濾波器設(shè)計(jì) 計(jì)算

    上傳時(shí)間: 2014-12-28

    上傳用戶:Yukiseop

  • XAPP1042-利用GPIO實(shí)現(xiàn)以太網(wǎng)PHY寄存器訪問

    The XPS Ethernetlite peripheral does not provide any mechanism to access the Ethernet PHYregisters. These registers are used to configure auto negotiation parameters and to obtain PHYstatus. This application note provides reference systems and associated software to accessPHY registers by connecting the serial management bus signals MDC and MDIO to GPIOswhich the software controls directly.

    標(biāo)簽: XAPP 1042 GPIO PHY

    上傳時(shí)間: 2013-10-17

    上傳用戶:JamesB

  • EDGE信道分配原則

      Contents   1 Introduction 1   2 Glosary 1   2.1 Concepts 1   2.2 Abbreviations and acronyms 4   3 Capabilities 6   4 Technical Description 6   4.1 General 6   4.2 Service oriented Allocation of Resources on the Abis   interface (SARA) 8   4.3 Configuration of dedicated PDCHs in Packet Switched   Domain (PSD) 10   4.4 Handling of Packet Data traffic 15   4.5 Channel selection in Cicuit Switched Domain (CSD) 19   4.6 Return of PDCHs to Cicuit Switched Domain (CSD) 22   4.7 Main changes in Ericsson GSM system R10/BSS R10 24   5 Engineering guidelines 24   6 parameters 26   6.1 Main controlling parameters 26   6.2 parameters for special adjustments 26   6.3 Value ranges and default values 28   7 References 29

    標(biāo)簽: EDGE 信道分配

    上傳時(shí)間: 2013-11-12

    上傳用戶:ainimao

  • 差分電路中單端及混合模式S-參數(shù)的使用

    Single-Ended and Differential S-parameters Differential circuits have been important incommunication systems for many years. In the past,differential communication circuits operated at lowfrequencies, where they could be designed andanalyzed using lumped-element models andtechniques. With the frequency of operationincreasing beyond 1GHz, and above 1Gbps fordigital communications, this lumped-elementapproach is no longer valid, because the physicalsize of the circuit approaches the size of awavelength.Distributed models and analysis techniques are nowused instead of lumped-element techniques.Scattering parameters, or S-parameters, have beendeveloped for this purpose [1]. These S-parametersare defined for single-ended networks. S-parameterscan be used to describe differential networks, but astrict definition was not developed until Bockelmanand others addressed this issue [2]. Bockelman’swork also included a study on how to adapt single-ended S-parameters for use with differential circuits[2]. This adaptation, called “mixed-mode S-parameters,” addresses differential and common-mode operation, as well as the conversion betweenthe two modes of operation.This application note will explain the use of single-ended and mixed-mode S-parameters, and the basicconcepts of microwave measurement calibration.

    標(biāo)簽: 差分電路 單端 模式

    上傳時(shí)間: 2014-03-25

    上傳用戶:yyyyyyyyyy

  • dxp2004教程-附安裝方法

    附件有二個(gè)文當(dāng),都是dxp2004教程 ,第一部份DXP2004的相關(guān)快捷鍵,以及中英文對(duì)照的意思。第二部份細(xì)致的講解的如何使用DXP2004。 dxp2004教程第一部份: 目錄 1 快捷鍵 2 常用元件及封裝 7 創(chuàng)建自己的集成庫 12 板層介紹 14 過孔 15 生成BOM清單 16 頂層原理圖: 16 生成PCB 17 包地 18 電路板設(shè)計(jì)規(guī)則 18 PCB設(shè)計(jì)注意事項(xiàng) 20 畫板心得 22 DRC 規(guī)則英文對(duì)照 22 一、Error Reporting 中英文對(duì)照 22 A : Violations Associated with Buses 有關(guān)總線電氣錯(cuò)誤的各類型(共 12 項(xiàng)) 22 B :Violations Associated Components 有關(guān)元件符號(hào)電氣錯(cuò)誤(共 20 項(xiàng)) 22 C : violations associated with document 相關(guān)的文檔電氣錯(cuò)誤(共 10 項(xiàng)) 23 D : violations associated with nets 有關(guān)網(wǎng)絡(luò)電氣錯(cuò)誤(共 19 項(xiàng)) 23 E : Violations associated with others 有關(guān)原理圖的各種類型的錯(cuò)誤 (3 項(xiàng) ) 24 二、 Comparator 規(guī)則比較 24 A : Differences associated with components 原理圖和 PCB 上有關(guān)的不同 ( 共 16 項(xiàng) ) 24 B : Differences associated with nets 原理圖和 PCB 上有關(guān)網(wǎng)絡(luò)不同(共 6 項(xiàng)) 25 C : Differences associated with parameters 原理圖和 PCB 上有關(guān)的參數(shù)不同(共 3 項(xiàng)) 25 Violations  Associated withBuses欄 —總線電氣錯(cuò)誤類型 25 Violations Associated with Components欄 ——元件電氣錯(cuò)誤類型 26 Violations Associated  with documents欄 —文檔電氣連接錯(cuò)誤類型 27 Violations Associated with Nets欄 ——網(wǎng)絡(luò)電氣連接錯(cuò)誤類型 27 Violations Associated with parameters欄 ——參數(shù)錯(cuò)誤類型 28 dxp2004教程第二部份 路設(shè)計(jì)自動(dòng)化( Electronic Design Automation ) EDA 指的就是將電路設(shè)計(jì)中各種工作交由計(jì)算機(jī)來協(xié)助完成。如電路圖( Schematic )的繪制,印刷電路板( PCB )文件的制作執(zhí)行電路仿真( Simulation )等設(shè)計(jì)工作。隨著電子工業(yè)的發(fā)展,大規(guī)模、超大規(guī)模集成電路的使用是電路板走線愈加精密和復(fù)雜。電子線路 CAD 軟件產(chǎn)生了, Protel 是突出的代表,它操作簡單、易學(xué)易用、功能強(qiáng)大。 1.1 Protel 的產(chǎn)生及發(fā)展 1985 年 誕生 dos 版 Protel 1991 年 Protel for Widows 1998 年 Protel98 這個(gè) 32 位產(chǎn)品是第一個(gè)包含 5 個(gè)核心模塊的 EDA 工具 1999 年 Protel99 既有原理圖的邏輯功能驗(yàn)證的混合信號(hào)仿真,又有了 PCB 信號(hào)完整性 分析的板級(jí)仿真,構(gòu)成從電路設(shè)計(jì)到真實(shí)板分析的完整體系。 2000 年 Protel99se 性能進(jìn)一步提高,可以對(duì)設(shè)計(jì)過程有更大控制力。 2002 年 Protel DXP 集成了更多工具,使用方便,功能更強(qiáng)大。 1.2 Protel DXP 主要特點(diǎn) 1 、通過設(shè)計(jì)檔包的方式,將原理圖編輯、電路仿真、 PCB 設(shè)計(jì)及打印這些功能有機(jī)地結(jié)合在一起,提供了一個(gè)集成開發(fā)環(huán)境。 2 、提供了混合電路仿真功能,為設(shè)計(jì)實(shí)驗(yàn)原理圖電路中某些功能模塊的正確與否提供了方便。 3 、提供了豐富的原理圖組件庫和 PCB 封裝庫,并且為設(shè)計(jì)新的器件提供了封裝向?qū)С绦颍喕朔庋b設(shè)計(jì)過程。 4 、提供了層次原理圖設(shè)計(jì)方法,支持“自上向下”的設(shè)計(jì)思想,使大型電路設(shè)計(jì)的工作組開發(fā)方式成為可能。 5 、提供了強(qiáng)大的查錯(cuò)功能。原理圖中的 ERC (電氣法則檢查)工具和 PCB 的 DRC (設(shè)計(jì)規(guī)則檢查)工具能幫助設(shè)計(jì)者更快地查出和改正錯(cuò)誤。 6 、全面兼容 Protel 系列以前版本的設(shè)計(jì)文件,并提供了 OrCAD 格式文件的轉(zhuǎn)換功能。 7 、提供了全新的 FPGA 設(shè)計(jì)的功能,這好似以前的版本所沒有提供的功能。

    標(biāo)簽: 2004 dxp 教程 安裝方法

    上傳時(shí)間: 2015-01-01

    上傳用戶:zhyfjj

  • Protel DXP2004詳細(xì)教程

    目錄 目錄 1 快捷鍵 2 常用元件及封裝 7 創(chuàng)建自己的集成庫 12 板層介紹 14 過孔 15 生成BOM清單 16 頂層原理圖: 16 生成PCB 17 包地 18 電路板設(shè)計(jì)規(guī)則 18 PCB設(shè)計(jì)注意事項(xiàng) 20 畫板心得 22 DRC 規(guī)則英文對(duì)照 22 一、Error Reporting 中英文對(duì)照 22 A : Violations Associated with Buses 有關(guān)總線電氣錯(cuò)誤的各類型(共 12 項(xiàng)) 22 B :Violations Associated Components 有關(guān)元件符號(hào)電氣錯(cuò)誤(共 20 項(xiàng)) 22 C : violations associated with document 相關(guān)的文檔電氣錯(cuò)誤(共 10 項(xiàng)) 23 D : violations associated with nets 有關(guān)網(wǎng)絡(luò)電氣錯(cuò)誤(共 19 項(xiàng)) 23 E : Violations associated with others 有關(guān)原理圖的各種類型的錯(cuò)誤 (3 項(xiàng) ) 24 二、 Comparator 規(guī)則比較 24 A : Differences associated with components 原理圖和 PCB 上有關(guān)的不同 ( 共 16 項(xiàng) ) 24 B : Differences associated with nets 原理圖和 PCB 上有關(guān)網(wǎng)絡(luò)不同(共 6 項(xiàng)) 25 C : Differences associated with parameters 原理圖和 PCB 上有關(guān)的參數(shù)不同(共 3 項(xiàng)) 25 Violations  Associated withBuses欄 —總線電氣錯(cuò)誤類型 25 Violations Associated with Components欄 ——元件電氣錯(cuò)誤類型 26 Violations Associated  with documents欄 —文檔電氣連接錯(cuò)誤類型 27 Violations Associated with Nets欄 ——網(wǎng)絡(luò)電氣連接錯(cuò)誤類型 27 Violations Associated with parameters欄 ——參數(shù)錯(cuò)誤類型 28  

    標(biāo)簽: Protel 2004 DXP 教程

    上傳時(shí)間: 2013-11-21

    上傳用戶:旭521

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