📄 linux embedded frequently asked question.htm
字号:
<!doctype html public "-//w3c//dtd html 4.0 transitional//en"><html><head> <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1"> <meta name="Author" content="Sebastien HUET"> <meta name="Description" content="Linux embedded FAQ and related questions"> <meta name="Keywords" content="linux,embedded,faq,frequently,asked,question,mini,small,f.a.q.,introduction,howto,manual,white,paper,qnx,vxworks"> <title>Linux Embedded FAQ</title></head><body text="#000000" bgcolor="#FFFFFF" link="#0000EF" vlink="#51188E" alink="#FF0000"><center><h1>Linux Embedded Frequently Asked Question</h1></center><center><h1>V0.3 September, 1999</h1></center><a href="#Introduction">Introduction</a><br><a href="#1">1 Linux as embedded operating system (EOS)</a><blockquote><a href="#1.1">1.1 Why Linux ?</a><br><a href="#1.2">1.2 Minimal configuration ?</a></blockquote><a href="#2">2 Linux as real time operating system (RTOS)</a><blockquote><a href="#2.1">2.1 RT-Linux</a></blockquote><a href="#3">3 Linux & flash Cards, flash eproms</a><blockquote><a href="#3.1">3.1 Pcmcia flash cards</a><br><a href="#3.2">3.2 DiskOnChip</a><br><a href="#3.3">3.3 Flash Limited write cycles</a><blockquote><a href="#3.3.1">3.3.1 solutions</a></blockquote></blockquote><a href="#References">References</a><h1><a NAME="Introduction"></a>Introduction.</h1>This faq has been made from discussions on different linux embedded andrelated mailing list and from several articles about linux as embeddedos. You, reader, may find some of your words or explanations in this document.If you don't complain with this, please send mail to faq@linux-embedded.comdescribing the part you are claiming , other comments may also be sentat the same mail address.<h1><a NAME="1"></a>1 Linux as embedded operating system (EOS)</h1>The choice between EOS depends on what you have to do. If you are writingthe firmware for a coffee maker, it will be silly to use a unix like OS.<h2><a NAME="1.1"></a>1.1 Why Linux ?</h2>Linux is freely available , includes a TCP/IP stack, runs over a multitudeof architecture, and provides drivers for almost all devices.<h2><a NAME="1.2"></a>1.2 Minimal configuration ?</h2>On a i386 architecture, the minimal needs are 386sx16 with 1Mb hard orflashdisk, and 4 Mb of ram<p>authors: <a href="#Ivo Zyvkov">Zyvkov Ivo</a>, <a href="#Ingo Cyliax">IngoCyliax</a><h2><a NAME="2"></a>2 Linux as real time operating system (RTOS)</h2>A real time operating system is an operating system whose correctness dependsnot only on the logic result, but also on the time that the result is produced.RTOSs are used in a variety of applications, especially embedded systems,and are becoming increasingly important. These types of systems usuallyinvolve the control of robots or machinery, telecommunications, air trafficcontrol and military command and control.<h2><a NAME="2.1"></a>2.1 RT-Linux</h2>RT-Linux follows the model of Linux: open source code and a cooperativedevelopment environment mainly through the Internet. This results in fastbug detection and fixing, as well as good user support through mailinglists and newsgroups. The RT-Linux approach to the design of a real-timemodule to the Linux kernel differs from that of traditional RTOSs likeVxWorks and QNX. Instead of having a real-time kernel that provides allthe OS features as real-time features, RT-Linux tries to separate the real-timeservices and non real-time services. It leaves all the major OS featureslike networking, device access (drivers), GUI system to the Linux kernel,and provides very basic features for<br>real-time processing.<p>authors: <a href="#Bernard Nahas">Bernard Nahas</a><p>links to Linux & Real Time may be found <a href="lem_links.html#RTOS">there</a>.<h1><a NAME="3"></a>3 Linux & flash Cards, flash eproms</h1> <h2><a NAME="3.1"></a>3.1 Pcmcia flash cards</h2><p><br>Pcmcia flash cards are seen as standard hard disk, while using thepcmcia package.<br> <h2><a NAME="3.2"></a>3.2 DiskOnChip</h2><p><b⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -