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  • lpc2478完全使用手冊

    NXP Semiconductor designed the LPC2400 microcontrollers around a 16-bit/32-bitARM7TDMI-S CPU core with real-time debug interfaces that include both JTAG andembedded Trace. The LPC2400 microcontrollers have 512 kB of on-chip high-speedFlash memory. This Flash memory includes a special 128-bit wide memory interface andaccelerator architecture that enables the CPU to execute sequential instructions fromFlash memory at the maximum 72 MHz system clock rate. This feature is available onlyon the LPC2000 ARM Microcontroller family of products. The LPC2400 can execute both32-bit ARM and 16-bit Thumb instructions. Support for the two Instruction Sets meansEngineers can choose to optimize their application for either performance or code size atthe sub-routine level. When the core executes instructions in Thumb state it can reducecode size by more than 30 % with only a small loss in performance while executinginstructions in ARM state maximizes core performance.

    標簽: 2478 lpc 使用手冊

    上傳時間: 2013-11-15

    上傳用戶:zouxinwang

  • FREERTOS的官方移植文檔

    FeaturesThe following standard features are provided.• Choice of RTOS scheduling policy1. Pre-emptive:Always runs the highest available task. Tasks of identical priorityshare CPU time (fully pre-emptive with round robin time slicing).2. Cooperative:Context switches only occur if a task blocks, or explicitly callstaskYIELD().• Co-routines (light weight tasks that utilise very little RAM).• Message queues• Semaphores [via macros]• Trace visualisation ability (requires more RAM)• Majority of source code common to all supported development tools• Wide range of ports and examples

    標簽: FREERTOS 移植 文檔

    上傳時間: 2013-10-13

    上傳用戶:13162218709

  • SJA1000 Stand-alone CAN contro

    The Controller Area Network (CAN) is a serial, asynchronous, multi-master communication protocol forconnecting electronic control modules, sensors and actuators in automotive and industrial applications.With the SJA1000, Philips Semiconductors provides a stand-alone CAN controller which is more than a simpleeplacement of the PCA82C200.Attractive features are implemented for a wide range of applications, supporting system optimization, diagnosisand maintenance.

    標簽: Stand-alone contro 1000 SJA

    上傳時間: 2013-11-18

    上傳用戶:yxgi5

  • XAPP122 - Spartan-XL FPGA的Express配置

    Express Mode uses an 8-bit wide bus path for fast configuration of Xilinx FPGAs. Thisapplication note provides information on how to perform Express configuration specifically forthe Spartan™-XL family. The Express mode signals and their associated timing are defined.The steps of Express configuration are described in detail, followed by detailed instructions thatshow how to implement the configuration circui

    標簽: Spartan-XL Express XAPP FPGA

    上傳時間: 2014-12-28

    上傳用戶:hewenzhi

  • XAPP740利用AXI互聯(lián)設計高性能視頻系統(tǒng)

    This application note covers the design considerations of a system using the performance features of the LogiCORE™ IP Advanced eXtensible Interface (AXI) Interconnect core. The design focuses on high system throughput through the AXI Interconnect core with F MAX  and area optimizations in certain portions of the design. The design uses five AXI video direct memory access (VDMA) engines to simultaneously move 10 streams (five transmit video streams and five receive video streams), each in 1920 x 1080p format, 60 Hz refresh rate, and up to 32 data bits per pixel. Each VDMA is driven from a video test pattern generator (TPG) with a video timing controller (VTC) block to set up the necessary video timing signals. Data read by each AXI VDMA is sent to a common on-screen display (OSD) core capable of multiplexing or overlaying multiple video streams to a single output video stream. The output of the OSD core drives the DVI video display interface on the board. Performance monitor blocks are added to capture performance data. All 10 video streams moved by the AXI VDMA blocks are buffered through a shared DDR3 SDRAM memory and are controlled by a MicroBlaze™ processor. The reference system is targeted for the Virtex-6 XC6VLX240TFF1156-1 FPGA on the Xilinx® ML605 Rev D evaluation board

    標簽: XAPP 740 AXI 互聯(lián)

    上傳時間: 2013-11-14

    上傳用戶:fdmpy

  • Virtex-5 GTP Transceiver Wizar

    The LogiCORE™ GTP Wizard automates the task of creating HDL wrappers to configure the high-speed serial GTP transceivers in Virtex™-5 LXT and SXT devices. The menu-driven interface allows one or more GTP transceivers to be configured using pre-definedtemplates for popular industry standards, or from scratch, to support a wide variety of custom protocols.The Wizard produces a wrapper, an example design, and a testbench for rapid integration and verification of the serial interface with your custom function Features• Creates customized HDL wrappers to configureVirtex-5 RocketIO™ GTP transceivers• Users can configure Virtex-5 GTP transceivers toconform to industry standard protocols usingpredefined templates, or tailor the templates forcustom protocols• Included protocol templates provide support for thefollowing specifications: Aurora, CPRI, FibreChannel 1x, Gigabit Ethernet, HD-SDI, OBSAI,OC3, OC12, OC48, PCI Express® (PCIe®), SATA,SATA II, and XAUI• Automatically configures analog settings• Each custom wrapper includes example design, testbench; and both implementation and simulation scripts

    標簽: Transceiver Virtex Wizar GTP

    上傳時間: 2013-10-23

    上傳用戶:leyesome

  • tcp ip協(xié)議詳解 中文版PDF

    很多不同的廠家生產(chǎn)各種型號的計算機,它們運行完全不同的操作系統(tǒng),但TCP.IP協(xié)議族允許它們互相進行通信。這一點很讓人感到吃驚,因為它的作用已遠遠超出了起初的設想。T C P / I P起源于6 0年代末美國政府資助的一個分組交換網(wǎng)絡研究項目,到9 0年代已發(fā)展成為計算機之間最常應用的組網(wǎng)形式。它是一個真正的開放系統(tǒng),因為協(xié)議族的定義及其多種實現(xiàn)可以不用花錢或花很少的錢就可以公開地得到。它成為被稱作“全球互聯(lián)網(wǎng)”或“因特網(wǎng)(Internet)”的基礎,該廣域網(wǎng)(WA N)已包含超過1 0 0萬臺遍布世界各地的計算機。本章主要對T C P / I P協(xié)議族進行概述,其目的是為本書其余章節(jié)提供充分的背景知識。 TCP.IP協(xié)議 縮略語 ACK (ACKnowledgment) TCP首部中的確認標志 API (Application Programming Interface) 應用編程接口 ARP (Address Resolution Protocol) 地址解析協(xié)議 ARPANET(Defense Advanced Research Project Agency NETwork) (美國)國防部遠景研究規(guī)劃局 AS (Autonomous System) 自治系統(tǒng) ASCII (American Standard Code for Information Interchange) 美國信息交換標準碼 ASN.1 (Abstract Syntax Notation One) 抽象語法記法1 BER (Basic Encoding Rule) 基本編碼規(guī)則 BGP (Border Gateway Protocol) 邊界網(wǎng)關協(xié)議 BIND (Berkeley Internet Name Domain) 伯克利I n t e r n e t域名 BOOTP (BOOTstrap Protocol) 引導程序協(xié)議 BPF (BSD Packet Filter) BSD 分組過濾器 CIDR (Classless InterDomain Routing) 無類型域間選路 CIX (Commercial Internet Exchange) 商業(yè)互聯(lián)網(wǎng)交換 CLNP (ConnectionLess Network Protocol) 無連接網(wǎng)絡協(xié)議 CRC (Cyclic Redundancy Check) 循環(huán)冗余檢驗 CSLIP (Compressed SLIP) 壓縮的S L I P CSMA (Carrier Sense Multiple Access) 載波偵聽多路存取 DCE (Data Circuit-terminating Equipment) 數(shù)據(jù)電路端接設備 DDN (Defense Data Network) 國防數(shù)據(jù)網(wǎng) DF (Don’t Fragment) IP首部中的不分片標志 DHCP (Dynamic Host Configuration Protocol) 動態(tài)主機配置協(xié)議 DLPI (Data Link Provider Interface) 數(shù)據(jù)鏈路提供者接口 DNS (Domain Name System) 域名系統(tǒng) DSAP (Destination Service Access Point) 目的服務訪問點 DSLAM (DSL Access Multiplexer) 數(shù)字用戶線接入復用器 DSSS (Direct Sequence Spread Spectrum) 直接序列擴頻 DTS (Distributed Time Service) 分布式時間服務 DVMRP (Distance Vector Multicast Routing Protocol) 距離向量多播選路協(xié)議 EBONE (European IP BackbONE) 歐洲I P主干網(wǎng) EOL (End of Option List) 選項清單結束 EGP (External Gateway Protocol) 外部網(wǎng)關協(xié)議 EIA (Electronic Industries Association) 美國電子工業(yè)協(xié)會 FCS (Frame Check Sequence) 幀檢驗序列 FDDI (Fiber Distributed Data Interface) 光纖分布式數(shù)據(jù)接口 FIFO (First In, First Out) 先進先出 FIN (FINish) TCP首部中的結束標志 FQDN (Full Qualified Domain Name) 完全合格的域名 FTP (File Transfer Protocol) 文件傳送協(xié)議 HDLC (High-level Data Link Control) 高級數(shù)據(jù)鏈路控制 HELLO 選路協(xié)議 IAB (Internet Architecture Board) Internet體系結構委員會 IANA (Internet Assigned Numbers Authority) Internet號分配機構 ICMP (Internet Control Message Protocol) Internet控制報文協(xié)議 IDRP (InterDomain Routing Protocol) 域間選路協(xié)議 IEEE (Institute of Electrical and Electronics Engineering) (美國)電氣與電子工程師協(xié)會 IEN (Internet Experiment Notes) 互聯(lián)網(wǎng)試驗注釋 IESG (Internet Engineering Steering Group) Internet工程指導小組 IETF (Internet Engineering Task Force) Internet工程專門小組 IGMP (Internet Group Management Protocol) Internet組管理協(xié)議 IGP (Interior Gateway Protocol) 內(nèi)部網(wǎng)關協(xié)議 IMAP (Internet Message Access Protocol) Internet報文存取協(xié)議 IP (Internet Protocol) 網(wǎng)際協(xié)議 I RTF (Internet Research Task Force) Internet研究專門小組 IS-IS (Intermediate System to Intermediate System Protocol) 中間系統(tǒng)到中間系統(tǒng)協(xié)議 ISN (Initial Sequence Number) 初始序號 ISO (International Organization for Standardization) 國際標準化組織 ISOC (Internet SOCiety) Internet協(xié)會 LAN (Local Area Network) 局域網(wǎng) LBX (Low Bandwidth X) 低帶寬X LCP (Link Control Protocol) 鏈路控制協(xié)議 LFN (Long Fat Net) 長肥網(wǎng)絡 LIFO (Last In, First Out) 后進先出 LLC (Logical Link Control) 邏輯鏈路控制 LSRR (Loose Source and Record Route) 寬松的源站及記錄路由 MBONE (Multicast Backbone On the InterNEt) Internet上的多播主干網(wǎng) MIB (Management Information Base) 管理信息庫 MILNET (MILitary NETwork) 軍用網(wǎng) MIME (Multipurpose Internet Mail Extensions) 通用I n t e r n e t郵件擴充 MSL (Maximum Segment Lifetime) 報文段最大生存時間 MSS (Maximum Segment Size) 最大報文段長度 M TA (Message Transfer Agent) 報文傳送代理 MTU (Maximum Transmission Unit) 最大傳輸單元 NCP (Network Control Protocol) 網(wǎng)絡控制協(xié)議 NFS (Network File System) 網(wǎng)絡文件系統(tǒng) NIC (Network Information Center) 網(wǎng)絡信息中心 NIT (Network Interface Tap) 網(wǎng)絡接口栓(S u n公司的一個程序) NNTP (Network News Transfer Protocol) 網(wǎng)絡新聞傳送協(xié)議 NOAO (National Optical Astronomy Observatories) 國家光學天文臺 NOP (No Operation) 無操作 NSFNET (National Science Foundation NETwork) 國家科學基金網(wǎng)絡 NSI (NASA Science Internet) (美國)國家宇航局I n t e r n e t NTP (Network Time Protocol) 網(wǎng)絡時間協(xié)議 NVT (Network Virtual Terminal) 網(wǎng)絡虛擬終端 OSF (Open Software Foudation) 開放軟件基金 OSI (Open Systems Interconnection) 開放系統(tǒng)互連 OSPF (Open Shortest Path First) 開放最短通路優(yōu)先 PAWS (Protection Against Wrapped Sequence number) 防止回繞的序號 PDU (Protocol Data Unit) 協(xié)議數(shù)據(jù)單元 POSIX (Portable Operating System Interface) 可移植操作系統(tǒng)接口 PPP (Point-to-Point Protocol) 點對點協(xié)議 PSH (PuSH) TCP首部中的急迫標志 RARP (Reverse Address Resolution Protocol) 逆地址解析協(xié)議 RFC (Request For Comments) Internet的文檔,其中的少部分成為標準文檔 RIP (Routing Information Protocol) 路由信息協(xié)議 RPC (Remote Procedure Call) 遠程過程調(diào)用 RR (Resource Record) 資源記錄 RST (ReSeT) TCP首部中的復位標志 RTO (Retransmission Time Out) 重傳超時 RTT (Round-Trip Time) 往返時間 SACK (Selective ACKnowledgment) 有選擇的確認 SLIP (Serial Line Internet Protocol) 串行線路I n t e r n e t協(xié)議 SMI (Structure of Management Information) 管理信息結構 SMTP (Simple Mail Transfer Protocol) 簡單郵件傳送協(xié)議 SNMP (Simple Network Management Protocol) 簡單網(wǎng)絡管理協(xié)議 SSAP (Source Service Access Point) 源服務訪問點 SSRR (Strict Source and Record Route) 嚴格的源站及記錄路由 SWS (Silly Window Syndrome) 糊涂窗口綜合癥 SYN (SYNchronous) TCP首部中的同步序號標志 TCP (Transmission Control Protocol) 傳輸控制協(xié)議 TFTP (Trivial File Transfer Protocol) 簡單文件傳送協(xié)議 TLI (Transport Layer Interface) 運輸層接口 TTL (Ti m e - To-Live) 生存時間或壽命 TUBA (TCP and UDP with Bigger Addresses) 具有更長地址的T C P和U D P Telnet 遠程終端協(xié)議 UA (User Agent) 用戶代理 UDP (User Datagram Protocol) 用戶數(shù)據(jù)報協(xié)議 URG (URGent) TCP首部中的緊急指針標志 UTC (Coordinated Universal Time) 協(xié)調(diào)的統(tǒng)一時間 UUCP (Unix-to-Unix CoPy) Unix到U n i x的復制 WAN (Wide Area Network) 廣域網(wǎng) WWW (World Wide Web) 萬維網(wǎng) XDR (eXternal Data Representation) 外部數(shù)據(jù)表示 XID (transaction ID) 事務標識符 XTI (X/Open Transport Layer Interface) X/ O p e n運輸層接口

    標簽: tcp 協(xié)議

    上傳時間: 2013-11-13

    上傳用戶:tdyoung

  • 針對Xilinx FPGA的電源解決方案

    Abstract: Field-programmable gate arrays (FPGAs) are used in a wide variety of applications and end markets, including digital signalprocessing, medical imaging, and high-performance computing. This application note outlines the issues related to powering FPGAs.It also discusses Maxim's solutions for powering Xilinx® FPGAs.

    標簽: Xilinx FPGA 電源解決方案

    上傳時間: 2013-12-16

    上傳用戶:haohaoxuexi

  • 嵌入式LINUX 電子教程全集

    嵌入式LINUX  電子教程全集 嵌入式系統(tǒng)出現(xiàn)于60年代晚期,它最初被用于控制機電電話交換機,如今已被廣泛的應用于工業(yè)制造、過程控制、通訊、儀器、儀表、汽車、船舶、航空、航天、軍事裝備、消費類產(chǎn)品等眾多領域。計算機系統(tǒng)核心CPU,每年在全球范圍內(nèi)的產(chǎn)量大概在二十億顆左右,其中超過80%應用于各類專用性很強的嵌入式系統(tǒng)。一般的說,凡是帶有微處理器的專用軟硬件系統(tǒng)都可以稱為嵌入式系統(tǒng)。   1. 嵌入式Linux系統(tǒng)就是利用Linux其自身的許多特點,把它應用到嵌入式系統(tǒng)里。   Linux做嵌入式的優(yōu)勢,首先,Linux是開放源代碼的,不存在黑箱技術,遍布全球的眾多Linux愛好者又是Linux開發(fā)者的強大技術支持;其次,Linux的內(nèi)核小、效率高,內(nèi)核的更新速度很快,linux是可以定制的,其系統(tǒng)內(nèi)核最小只有約134KB。第三,Linux是免費的OS,在價格上極具競爭力。 Linux還有著嵌入式操作系統(tǒng)所需要的很多特色,突出的就是Linux適應于多種CPU和多種硬件平臺,是一個跨平臺的系統(tǒng)。到目前為止,它可以支持二三十種CPU。而且性能穩(wěn)定,裁剪性很好,開發(fā)和使用都很容易。很多CPU包括家電業(yè)芯片,都開始做Linux的平臺移植工作。移植的速度遠遠超過Java的開發(fā)環(huán)境。也就是說,如果今天用Linux環(huán)境開發(fā)產(chǎn)品,那么將來換CPU就不會遇到困擾。同時,Linux內(nèi)核的結構在網(wǎng)絡方面是非常完整的,Linux對網(wǎng)絡中最常用的TCP/IP協(xié)議有最完備的支持。提供了包括十兆、百兆、千兆的以太網(wǎng)絡,以及無線網(wǎng)絡,Toker ring(令牌環(huán)網(wǎng))、光纖甚至衛(wèi)星的支持。所以Linux很適于做信息家電的開發(fā)。   還有使用Linux為的是來開發(fā)無線連接產(chǎn)品的開發(fā)者越來越多。Linux在快速增長的無線連接應用主場中有一個非常重要的優(yōu)勢,就是有足夠快的開發(fā)速度。這是因為LInux有很多工具,并且Linux為眾多程序員所熟悉。因此,我們要在嵌入式系統(tǒng)中使用Linux操作系統(tǒng)。   Linux的大小適合嵌入式操作系統(tǒng)——Linux固有的模塊性,適應性和可配置性,使得這很容易做到。另外,Linux源碼的實用性和成千上萬的程序員熱切其望它用于無數(shù)的嵌入式應用軟件中,導致很多嵌入式Linux的出現(xiàn),包括:Embedix,ETLinux,LEM,Linux Router Project,LOAF,uCLinux,muLinux,ThinLinux,F(xiàn)irePlug,Linux和PizzaBox Linux   相對,Linux的圖形界面還相對較弱,但近年Linux的圖形界面發(fā)展也很快,這也就不是問題。   2. 什么是嵌入式Linux   嵌入式linux 是將日益流行的Linux操作系統(tǒng)進行裁剪修改,使之能在嵌入式計算機系統(tǒng)上運行的一種操作系統(tǒng)。嵌入式linux既繼承了Interlnet上無限的開放源代碼資源,又具有嵌入式操作系統(tǒng)的特性。嵌入式Linux的特點是版權費免費;購買費用媒介成本技術支持全世界的自由軟件開發(fā)者提供支持網(wǎng)絡特性免費,而且性能優(yōu)異,軟件移植容易,代碼開放,有許多應用軟件支持,應用產(chǎn)品開發(fā)周期短,新產(chǎn)品上市迅速,因為有許多公開的代碼可以參考和移植,實時性能RT_Linux Hardhat Linux 等嵌入式Linux支持,實時性能穩(wěn)定性好安全性好。   3. 嵌入式Linux有巨大的市場前景和商業(yè)機會,出現(xiàn)了大量的專業(yè)公司和產(chǎn)品,如Montavista Lineo Emi等,有行業(yè)協(xié)會如Embedded Linux Consortum等,得到世界著名計算機公司和OEM板級廠商的支持,例如IBM Motorola Intel等。傳統(tǒng)的嵌入式系統(tǒng)廠商也采用了Linux策略,如Lynxworks Windriver QNX等,還有Internet上的大量嵌入式Linux愛好者的支持。嵌入式Linux支持幾乎所有的嵌入式CPU和被移植到幾乎所有的嵌入式OEM板。   4.嵌入式Linux的應用領域非常廣泛,主要的應用領域有信息家電、PDA 、機頂盒、Digital Telephone、Answering Machine、Screen Phone 、數(shù)據(jù)網(wǎng)絡、Ethernet Switches、Router、Bridge、Hub、Remote access servers、ATM、Frame relay 、遠程通信、醫(yī)療電子、交通運輸計算機外設、工業(yè)控制、航空航天領域等。   5.如果分別讓10位工程師給出嵌入式系統(tǒng)的定義,將得到10個不同的答案。一般來說,大部分的嵌入式系統(tǒng)執(zhí)行特定的任務。我們假定最簡單的嵌入式系統(tǒng)包括輸入/輸出功能,以及一些控制邏輯,該系統(tǒng)基于它的配置執(zhí)行某些類型的功能。按照這個標準,可以認為一個包含實現(xiàn)控制邏輯74123計數(shù)器以及一個狀態(tài)是一個嵌入式系統(tǒng)。也許可以補充說,該系統(tǒng)必須可通過存儲在固件中的軟件進行編程。這個新的嵌入式系統(tǒng)定義包括輸入/輸出(I/O),以及存儲在系統(tǒng)固件中的控制邏輯。一個帶有鼠標、鍵盤、網(wǎng)絡連接并運行圖形用戶界面(GUI,graphical user interface)多任務操作系統(tǒng)的桌面計算機顯然滿足這些要求,但我們能認為它是一個嵌入式系統(tǒng)嗎?   如果桌面計算機不是一個嵌入式系統(tǒng),那么手持設備呢?它們有I/O功能,可以運行存儲在固件中的控制邏輯。有人說,桌面計算機和手持設備都有通用計算機設備,可以運行軟件來執(zhí)行許多不同的任務,與之不同的是,嵌入式系統(tǒng)(例如,洗碗機控制器或飛行導航系統(tǒng))主要是為特定任務而設計的。這種特定的功能限定使嵌入式設備有功能上的唯一性。如果是這樣,為什么一些嵌入式系統(tǒng)設計成具有附加的功能,如存儲在非易失性存儲器中的程序,并且具有運行可以完成原始設計范圍之外的任務的多任務操作系統(tǒng)的能力呢?   在過去,區(qū)分嵌入式系統(tǒng)和通用計算機比現(xiàn)在簡單的多。例如,可以很容易地區(qū)分出一個基于8051的T1分幅卡嵌入式系統(tǒng)和一臺Sun UNIX工作站。而現(xiàn)在,從功能方面很難區(qū)分一臺Sun工作站和一個包含PowerPC以及32MB內(nèi)存和16MB閃存的機頂盒。這樣的機頂盒可以運行帶GUI的多任務操作系統(tǒng),可現(xiàn)場升級,可以同時運行多個程序(如視頻控制器、數(shù)字錄像和Java虛擬機),還可以進行安全的因特網(wǎng)在線交易。很難判斷這種機頂盒是否是一個嵌入式系統(tǒng)。顯然,硬件性能的提升和價格的下降使通用計算機和嵌入式系統(tǒng)之間的界限變得很模糊,技術的進步使得我們很難定義什么是嵌入式。

    標簽: LINUX 嵌入式 電子教程

    上傳時間: 2014-12-30

    上傳用戶:ljt101007

  • lpc2292/lpc2294 pdf datasheet

    The LPC2292/2294 microcontrollers are based on a 16/32-bit ARM7TDMI-S CPU with real-time emulation and embedded trace support, together with 256 kB of embedded high-speed flash memory. A 128-bit wide memory interface and a unique accelerator architecture enable 32-bit code execution at the maximum clock rate. For critical code size applications, the alternative 16-bit Thumb mode reduces code by more than 30 pct with minimal performance penalty. With their 144-pin package, low power consumption, various 32-bit timers, 8-channel 10-bit ADC, 2/4 (LPC2294) advanced CAN channels, PWM channels and up to nine external interrupt pins these microcontrollers are particularly suitable for automotive and industrial control applications as well as medical systems and fault-tolerant maintenance buses. The number of available fast GPIOs ranges from 76 (with external memory) through 112 (single-chip). With a wide range of additional serial communications interfaces, they are also suited for communication gateways and protocol converters as well as many other general-purpose applications. Remark: Throughout the data sheet, the term LPC2292/2294 will apply to devices with and without the /00 or /01 suffix. The suffixes /00 and /01 will be used to differentiate from other devices only when necessary.

    標簽: lpc datasheet 2292 2294

    上傳時間: 2014-12-30

    上傳用戶:aysyzxzm

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