shell scripting book
標(biāo)簽: scripting shell book
上傳時(shí)間: 2017-08-30
上傳用戶:linlin
shell scripting book
標(biāo)簽: scripting shell book
上傳時(shí)間: 2017-08-30
上傳用戶:xymbian
shell scripting book
標(biāo)簽: scripting shell book
上傳時(shí)間: 2017-08-30
上傳用戶:璇珠官人
ZigBee是近年來出現(xiàn)的一種新型無線通信技術(shù),其具有近距離、低復(fù)雜度、低功耗、低數(shù)據(jù)速率、低成本的特點(diǎn),在家用系統(tǒng)控制、樓宇自動(dòng)化、工業(yè)監(jiān)控領(lǐng)域具有廣闊的市場空間。ZigBee的物理層和數(shù)據(jù)鏈路層由IEEE802.15.4工作組制定,高層(網(wǎng)絡(luò)層、數(shù)據(jù)安全性及互邊互通應(yīng)用)由ZigBee聯(lián)盟負(fù)責(zé)。 隨著ZigBee技術(shù)在工業(yè)現(xiàn)場應(yīng)用,越來越多的ZigBee設(shè)備終端將出現(xiàn)在工業(yè)現(xiàn)場,這就提出了將這些ZigBee設(shè)備與傳統(tǒng)的以太網(wǎng)連接起來要求,為此需要設(shè)計(jì)一個(gè)無線的ZigBee網(wǎng)關(guān)來進(jìn)行數(shù)據(jù)轉(zhuǎn)發(fā),因此對ZigBee網(wǎng)關(guān)的研究和設(shè)計(jì)具有重要的意義。 本系統(tǒng)選用基于ARM 920T內(nèi)核的S3C2410作為ZigBee網(wǎng)關(guān)的主處理器,并且選用符合802.15.4標(biāo)準(zhǔn)的CC2420作為ZigBee網(wǎng)關(guān)的無線收發(fā)器。為了降低開發(fā)成本以及方便程序升級(jí),網(wǎng)關(guān)選用開源嵌入式Linux操作系統(tǒng),基于2.6.內(nèi)核進(jìn)行開發(fā)。本文主要對網(wǎng)關(guān)軟件部分進(jìn)行了深入研究。軟件部分主要由2個(gè)程序組成:無線收發(fā)器的驅(qū)動(dòng)程序和網(wǎng)關(guān)程序。其中網(wǎng)關(guān)程序主要包含Zigbee協(xié)議棧模塊和網(wǎng)關(guān)通信模塊。開發(fā)和測試主要語言采用標(biāo)準(zhǔn)C語言,驅(qū)動(dòng)部分測試部分采用Bash腳本。 本文首先介紹了無線通信的背景知識(shí)和ZigBee協(xié)議棧,然后詳細(xì)闡述了采用Linux來進(jìn)行無線收發(fā)器驅(qū)動(dòng)程序設(shè)計(jì)的關(guān)鍵點(diǎn),同時(shí)對基于Linux的嵌入式ZigBee網(wǎng)關(guān)協(xié)議棧進(jìn)行了移植,并且給出了ZigBee網(wǎng)關(guān)通信程序的設(shè)計(jì)方法以及程序的編譯、調(diào)試和測試方法,實(shí)現(xiàn)了將ZigBee設(shè)備的數(shù)據(jù)及其狀態(tài)轉(zhuǎn)發(fā)給上位數(shù)據(jù)服務(wù)器的過程,最后還提出了作者對未來工作方向的一些改進(jìn)思路和方法。
標(biāo)簽: ZigBee ARM 嵌入式無線 網(wǎng)關(guān)
上傳時(shí)間: 2013-07-17
上傳用戶:cuibaigao
隨著Android平臺(tái)在移動(dòng)終端的市場占有率越來越高,安卓應(yīng)用的開發(fā)周期越來越短,繁冗且效率底下的Java在新的形勢下已漸漸表現(xiàn)出它的疲態(tài),為了解決Android應(yīng)用開發(fā)語言單一的問題,Google發(fā)起了SL4A(The Scripting Layer for Android)項(xiàng)目。本文簡單的介紹了SL4A的工作原理,并以Eclipse和Android SDK為開發(fā)工具,在SL4A的支持下使用Python語言實(shí)現(xiàn)Android應(yīng)用GUI的開發(fā)。
上傳時(shí)間: 2013-11-01
上傳用戶:s363994250
關(guān)于嵌入式編程的小結(jié)
上傳時(shí)間: 2014-12-30
上傳用戶:heart_2007
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
Nios II軟件構(gòu)建工具入門 The Nios® II Software Build Tools (SBT) allows you to construct a wide variety of complex embedded software systems using a command-line interface. From this interface, you can execute Software Built Tools command utilities, and use scripts other tools) to combine the command utilities in many useful ways. This chapter introduces you to project creation with the SBT at the command line This chapter includes the following sections: ■ “Advantages of Command-Line Software Development” ■ “Outline of the Nios II SBT Command-Line Interface” ■ “Getting Started in the SBT Command Line” ■ “Software Build Tools Scripting Basics” on page 3–8
上傳時(shí)間: 2013-11-15
上傳用戶:nanxia
國外游戲開發(fā)者雜志2002年第十期配套代碼,包含Jon Blow的“Toward Better Scripting”的源代碼
上傳時(shí)間: 2015-01-05
上傳用戶:songnanhua
SPLASH is a c++ class library that implements many of the Perl constructs and data types, including extensive regex regular expression pattern matching. For those not familiar with Perl, it is an excellent scripting language by Larry Wall and is available for most platforms. This Class library provides List, String, Regular Expression, and text manipulation handling capabilities based on those provided in Perl
標(biāo)簽: implements constructs including library
上傳時(shí)間: 2013-12-07
上傳用戶:1583060504
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