User ManualRev. 1.2SmartRF® CC2420DK: Packet Sniffer for IEEE 802.15.4 and ZigBee Table of contents1 INTRODUCTION...............................................................................................31.1 HARDWARE PLATFORM.......................................................................................31.2 SOFTWARE.........................................................................................................32 USER INTERFACE..........................................................................................42.1 MENUS AND TOOLBARS.......................................................................................62.2 SETUP................................................................................................................62.3 SELECT FIELDS...................................................................................................72.3.1 Tips............................................................................................................72.4 PACKET DETAILS.................................................................................................72.5 ADDRESS BOOK..................................................................................................92.5.1 Tips............................................................................................................92.6 DISPLAY FILTER................................................................................................102.7 TIME LINE.........................................................................................................103 HELP....................................................................................................................114 TROUBLESHOOTING..................................................................................125 GENERAL INFORMATION........................................................................135.1 DOCUMENT HISTORY........................................................................................135.2 DISCLAIMER......................................................................................................135.3 TRADEMARKS...................................................................................................136 ADDRESS INFORMATION........................................................................14
標(biāo)簽: 數(shù)據(jù) 分析儀 說(shuō)明書(shū)
上傳時(shí)間: 2014-01-14
上傳用戶:zhangyi99104144
Deliver more functionality to the end-user sooner and more cost-effectively
標(biāo)簽: Speech_Lifeng Welcome ARM
上傳時(shí)間: 2014-01-13
上傳用戶:lifangyuan12
This book is for students and Linux System Administrators. It provides the skills to read, write, and debug Linux shell scripts using bash shell. The book begins by describing Linux and simple scripts to automate frequently executed commands and continues by describing conditional logic, user interaction, loops, menus, traps, and functions.
上傳時(shí)間: 2014-12-30
上傳用戶:黃蛋的蛋黃
With the Altera Nios II embedded processor, you as the system designercan accelerate time-critical software algorithms by adding custominstructions to the Nios II processor instruction set. Using custominstructions, you can reduce a complex sequence of standard instructionsto a single instruction implemented in hardware. You can use this featurefor a variety of applications, for example, to optimize software innerloops for digital signal processing (DSP), packet header processing, andcomputation-intensive applications. The Nios II configuration wizard,part of the Quartus® II software’s SOPC Builder, provides a graphicaluser interface (GUI) used to add up to 256 custom instructions to theNios II processor
上傳時(shí)間: 2013-11-07
上傳用戶:swing
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(jī)電電話交換機(jī),如今已被廣泛的應(yīng)用于工業(yè)制造、過(guò)程控制、通訊、儀器、儀表、汽車、船舶、航空、航天、軍事裝備、消費(fèi)類產(chǎn)品等眾多領(lǐng)域。計(jì)算機(jī)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(guò)80%應(yīng)用于各類專用性很強(qiáng)的嵌入式系統(tǒng)。一般的說(shuō),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(diǎn),把它應(yīng)用到嵌入式系統(tǒng)里。 Linux做嵌入式的優(yōu)勢(shì),首先,Linux是開(kāi)放源代碼的,不存在黑箱技術(shù),遍布全球的眾多Linux愛(ài)好者又是Linux開(kāi)發(fā)者的強(qiáng)大技術(shù)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(fèi)的OS,在價(jià)格上極具競(jìng)爭(zhēng)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(yīng)于多種CPU和多種硬件平臺(tái),是一個(gè)跨平臺(tái)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(kāi)發(fā)和使用都很容易。很多CPU包括家電業(yè)芯片,都開(kāi)始做Linux的平臺(tái)移植工作。移植的速度遠(yuǎn)遠(yuǎn)超過(guò)Java的開(kāi)發(fā)環(huán)境。也就是說(shuō),如果今天用Linux環(huán)境開(kāi)發(fā)產(chǎn)品,那么將來(lái)?yè)QCPU就不會(huì)遇到困擾。同時(shí),Linux內(nèi)核的結(jié)構(gòu)在網(wǎng)絡(luò)方面是非常完整的,Linux對(duì)網(wǎng)絡(luò)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(luò),以及無(wú)線網(wǎng)絡(luò),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(kāi)發(fā)。 還有使用Linux為的是來(lái)開(kāi)發(fā)無(wú)線連接產(chǎn)品的開(kāi)發(fā)者越來(lái)越多。Linux在快速增長(zhǎng)的無(wú)線連接應(yīng)用主場(chǎng)中有一個(gè)非常重要的優(yōu)勢(shì),就是有足夠快的開(kāi)發(fā)速度。這是因?yàn)長(zhǎng)Inux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(yīng)性和可配置性,使得這很容易做到。另外,Linux源碼的實(shí)用性和成千上萬(wàn)的程序員熱切其望它用于無(wú)數(shù)的嵌入式應(yīng)用軟件中,導(dǎo)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(duì),Linux的圖形界面還相對(duì)較弱,但近年Linux的圖形界面發(fā)展也很快,這也就不是問(wèn)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(jìn)行裁剪修改,使之能在嵌入式計(jì)算機(jī)系統(tǒng)上運(yùn)行的一種操作系統(tǒng)。嵌入式linux既繼承了Interlnet上無(wú)限的開(kāi)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(diǎn)是版權(quán)費(fèi)免費(fèi);購(gòu)買費(fèi)用媒介成本技術(shù)支持全世界的自由軟件開(kāi)發(fā)者提供支持網(wǎng)絡(luò)特性免費(fèi),而且性能優(yōu)異,軟件移植容易,代碼開(kāi)放,有許多應(yīng)用軟件支持,應(yīng)用產(chǎn)品開(kāi)發(fā)周期短,新產(chǎn)品上市迅速,因?yàn)橛性S多公開(kāi)的代碼可以參考和移植,實(shí)時(shí)性能RT_Linux Hardhat Linux 等嵌入式Linux支持,實(shí)時(shí)性能穩(wěn)定性好安全性好。 3. 嵌入式Linux有巨大的市場(chǎng)前景和商業(yè)機(jī)會(huì),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(huì)如Embedded Linux Consortum等,得到世界著名計(jì)算機(jī)公司和OEM板級(jí)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(ài)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(yīng)用領(lǐng)域非常廣泛,主要的應(yīng)用領(lǐng)域有信息家電、PDA 、機(jī)頂盒、Digital Telephone、Answering Machine、Screen Phone 、數(shù)據(jù)網(wǎng)絡(luò)、Ethernet Switches、Router、Bridge、Hub、Remote access servers、ATM、Frame relay 、遠(yuǎn)程通信、醫(yī)療電子、交通運(yùn)輸計(jì)算機(jī)外設(shè)、工業(yè)控制、航空航天領(lǐng)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(gè)不同的答案。一般來(lái)說(shuō),大部分的嵌入式系統(tǒng)執(zhí)行特定的任務(wù)。我們假定最簡(jiǎn)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(gè)標(biāo)準(zhǔn),可以認(rèn)為一個(gè)包含實(shí)現(xiàn)控制邏輯74123計(jì)數(shù)器以及一個(gè)狀態(tài)是一個(gè)嵌入式系統(tǒng)。也許可以補(bǔ)充說(shuō),該系統(tǒng)必須可通過(guò)存儲(chǔ)在固件中的軟件進(jìn)行編程。這個(gè)新的嵌入式系統(tǒng)定義包括輸入/輸出(I/O),以及存儲(chǔ)在系統(tǒng)固件中的控制邏輯。一個(gè)帶有鼠標(biāo)、鍵盤(pán)、網(wǎng)絡(luò)連接并運(yùn)行圖形用戶界面(GUI,graphical user interface)多任務(wù)操作系統(tǒng)的桌面計(jì)算機(jī)顯然滿足這些要求,但我們能認(rèn)為它是一個(gè)嵌入式系統(tǒng)嗎? 如果桌面計(jì)算機(jī)不是一個(gè)嵌入式系統(tǒng),那么手持設(shè)備呢?它們有I/O功能,可以運(yùn)行存儲(chǔ)在固件中的控制邏輯。有人說(shuō),桌面計(jì)算機(jī)和手持設(shè)備都有通用計(jì)算機(jī)設(shè)備,可以運(yùn)行軟件來(lái)執(zhí)行許多不同的任務(wù),與之不同的是,嵌入式系統(tǒng)(例如,洗碗機(jī)控制器或飛行導(dǎo)航系統(tǒng))主要是為特定任務(wù)而設(shè)計(jì)的。這種特定的功能限定使嵌入式設(shè)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(shè)計(jì)成具有附加的功能,如存儲(chǔ)在非易失性存儲(chǔ)器中的程序,并且具有運(yùn)行可以完成原始設(shè)計(jì)范圍之外的任務(wù)的多任務(wù)操作系統(tǒng)的能力呢? 在過(guò)去,區(qū)分嵌入式系統(tǒng)和通用計(jì)算機(jī)比現(xiàn)在簡(jiǎn)單的多。例如,可以很容易地區(qū)分出一個(gè)基于8051的T1分幅卡嵌入式系統(tǒng)和一臺(tái)Sun UNIX工作站。而現(xiàn)在,從功能方面很難區(qū)分一臺(tái)Sun工作站和一個(gè)包含PowerPC以及32MB內(nèi)存和16MB閃存的機(jī)頂盒。這樣的機(jī)頂盒可以運(yùn)行帶GUI的多任務(wù)操作系統(tǒng),可現(xiàn)場(chǎng)升級(jí),可以同時(shí)運(yùn)行多個(gè)程序(如視頻控制器、數(shù)字錄像和Java虛擬機(jī)),還可以進(jìn)行安全的因特網(wǎng)在線交易。很難判斷這種機(jī)頂盒是否是一個(gè)嵌入式系統(tǒng)。顯然,硬件性能的提升和價(jià)格的下降使通用計(jì)算機(jī)和嵌入式系統(tǒng)之間的界限變得很模糊,技術(shù)的進(jìn)步使得我們很難定義什么是嵌入式。
上傳時(shí)間: 2014-12-30
上傳用戶:ljt101007
The #1 Step-by-Step Guide to labviewNow Completely Updated for labview 8! Master labview 8 with the industry's friendliest, most intuitive tutorial: labview for Everyone, Third Edition. Top labview experts Jeffrey Travis and Jim Kring teach labview the easy way: through carefully explained, step-by-step examples that give you reusable code for your own projects! This brand-new Third Edition has been fully revamped and expanded to reflect new features and techniques introduced in labview 8. You'll find two new chapters, plus dozens of new topics, including Project Explorer, AutoTool, XML, event-driven programming, error handling, regular expressions, polymorphic VIs, timed structures, advanced reporting, and much more. Certified labview Developer (CLD) candidates will find callouts linking to key objectives on NI's newest exam, making this book a more valuable study tool than ever. Not just what to d why to do it! Use labview to build your own virtual workbench Master labview's foundations: wiring, creating, editing, and debugging VIs; using controls and indicators; working with data structures; and much more Learn the "art" and best practices of effective labview development NEW: Streamline development with labview Express VIs NEW: Acquire data with NI-DAQmx and the labview DAQmx VIs NEW: Discover design patterns for error handling, control structures, state machines, queued messaging, and more NEW: Create sophisticated user interfaces with tree and tab controls, drag and drop, subpanels, and more Whatever your application, whatever your role, whether you've used labview or not, labview for Everyone, Third Edition is the fastest, easiest way to get the results you're after!
標(biāo)簽: Everyone LabVIEW for 英文
上傳時(shí)間: 2013-10-14
上傳用戶:shawvi
用MDK 生成bin 文件1用MDK 生成bin 文件Embest 徐良平在RV MDK 中,默認(rèn)情況下生成*.hex 的可執(zhí)行文件,但是當(dāng)我們要生成*.bin 的可執(zhí)行文件時(shí)怎么辦呢?答案是可以使用RVCT 的fromelf.exe 工具進(jìn)行轉(zhuǎn)換。也就是說(shuō)首先將源文件編譯鏈接成*.axf 的文件,然后使用fromelf.exe 工具將*.axf 格式的文件轉(zhuǎn)換成*.bin格式的文件。下面將具體說(shuō)明這個(gè)操作步驟:1. 打開(kāi)Axf_To_Bin 文件中的Axf_To_Bin.uv2 工程文件;2. 打開(kāi)Options for Target ‘Axf_To_Bin’對(duì)話框,選擇User 標(biāo)簽頁(yè);3. 構(gòu)選Run User Programs After Build/Rebuild 框中的Run #1 多選框,在后邊的文本框中輸入C:\Keil\ARM\BIN31\fromelf.exe --bin -o ./output/Axf_To_Bin.bin ./output/Axf_To_Bin.axf 命令行;4. 重新編譯文件,在./output/文件夾下生成了Axf_To_Bin.bin 文件。在上面的步驟中,有幾點(diǎn)值得注意的是:1. C:\Keil\ARM\BIN31\表示RV MDK 的安裝目錄;2. fromelf.exe 命令的具體語(yǔ)法格式如下:命令的格式為:fromelf [options] input_file命令選項(xiàng)如下:--help 顯示幫助信息--vsn 顯示版本信息--output file 輸出文件(默認(rèn)的輸出為文本格式)--nodebug 在生成的映象中不包含調(diào)試信息--nolinkview 在生成的映象中不包含段的信息二進(jìn)制輸出格式:--bin 生成Plain Binary 格式的文件--m32 生成Motorola 32 位十六進(jìn)制格式的文件--i32 生成Intel 32 位十六進(jìn)制格式的文件--vhx 面向字節(jié)的位十六進(jìn)制格式的文件t--base addr 設(shè)置m32,i32 格式文件的基地址--text 顯示文本信息文本信息的標(biāo)志-v 打印詳細(xì)信息-a 打印數(shù)據(jù)地址(針對(duì)帶調(diào)試信息的映象)-d 打印數(shù)據(jù)段的內(nèi)容-e 打印表達(dá)式表print exception tables-f 打印消除虛函數(shù)的信息-g 打印調(diào)試表print debug tables-r 打印重定位信息-s 打印字符表-t 打印字符串表-y 打印動(dòng)態(tài)段的內(nèi)容-z 打印代碼和數(shù)據(jù)大小的信息
標(biāo)簽: MDK bin 可執(zhí)行文件
上傳時(shí)間: 2013-12-17
上傳用戶:AbuGe
同步技術(shù)是跳頻通信系統(tǒng)的關(guān)鍵技術(shù)之一,尤其是在快速跳頻通信系統(tǒng)中,常規(guī)跳頻通信通過(guò)同步字頭攜帶相關(guān)碼的方法來(lái)實(shí)現(xiàn)同步,但對(duì)于快跳頻來(lái)說(shuō),由于是一跳或者多跳傳輸一個(gè)調(diào)制符號(hào),難以攜帶相關(guān)碼。對(duì)此引入雙跳頻圖案方法,提出了一種適用于快速跳頻通信系統(tǒng)的同步方案。采用短碼攜帶同步信息,克服了快速跳頻難以攜帶相關(guān)碼的困難。分析了同步性能,仿真結(jié)果表明該方案同步時(shí)間短、虛警概率低、捕獲概率高,同步性能可靠。 Abstract: Synchronization is one of the key techniques to frequency-hopping communication system, especially in the fast frequency hopping communication system. In conventional frequency hopping communication systems, synchronization can be achieved by synchronization-head which can be used to carry the synchronization information, but for the fast frequency hopping, Because modulation symbol is transmitted by per hop or multi-hop, it is difficult to carry the correlation code. For the limitation of fast frequency hopping in carrying correlation code, a fast frequency-hopping synchronization scheme with two hopping patterns is proposed. The synchronization information is carried by short code, which overcomes the difficulty of correlation code transmission in fast frequency-hopping. The performance of the scheme is analyzed, and simulation results show that the scheme has the advantages of shorter synchronization time, lower probability of false alarm, higher probability of capture and more reliable of synchronization.
標(biāo)簽: 快速跳頻 同步技術(shù) 通信系統(tǒng)
上傳時(shí)間: 2013-11-23
上傳用戶:mpquest
On the LPC13xx, programming, erasure and re-programming of the on-chip flash can be performed using In-System Programming (ISP) via the UART serial port, and also, can be performed using In-Application Programming (IAP) calls directed by the end-user code. For In-System Programming (ISP) via the UART serial port, the ISP command handler (resides in the bootloader) allows erasure of one or more sector (s) of the on-chip flash memory.
標(biāo)簽: 1300 LPC 勘誤 數(shù)據(jù)手冊(cè)
上傳時(shí)間: 2013-12-13
上傳用戶:lmq0059
The NXP LPC315x combine an 180 MHz ARM926EJ-S CPU core, High-speed USB 2.0OTG, 192 KB SRAM, NAND flash controller, flexible external bus interface, an integratedaudio codec, Li-ion charger, Real-Time Clock (RTC), and a myriad of serial and parallelinterfaces in a single chip targeted at consumer, industrial, medical, and communicationmarkets. To optimize system power consumption, the LPC315x have multiple powerdomains and a very flexible Clock Generation Unit (CGU) that provides dynamic clockgating and scaling.The LPC315x is implemented as multi-chip module with two side-by-side dies, one fordigital fuctions and one for analog functions, which include a Power Supply Unit (PSU),audio codec, RTC, and Li-ion battery charger.
上傳時(shí)間: 2014-01-17
上傳用戶:Altman
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