📄 cdl-concepts.html
字号:
<!-- Copyright (C) 2003 Red Hat, Inc. -->
<!-- This material may be distributed only subject to the terms -->
<!-- and conditions set forth in the Open Publication License, v1.0 -->
<!-- or later (the latest version is presently available at -->
<!-- http://www.opencontent.org/openpub/). -->
<!-- Distribution of the work or derivative of the work in any -->
<!-- standard (paper) book form is prohibited unless prior -->
<!-- permission is obtained from the copyright holder. -->
<HTML
><HEAD
><TITLE
>CDL Concepts</TITLE
><meta name="MSSmartTagsPreventParsing" content="TRUE">
<META
NAME="GENERATOR"
CONTENT="Modular DocBook HTML Stylesheet Version 1.76b+
"><LINK
REL="HOME"
TITLE="eCos User Guide"
HREF="ecos-user-guide.html"><LINK
REL="UP"
TITLE="eCos Programming Concepts and Techniques"
HREF="ecos-programming-concepts-and-techniques.html"><LINK
REL="PREVIOUS"
TITLE="eCos Programming Concepts and Techniques"
HREF="ecos-programming-concepts-and-techniques.html"><LINK
REL="NEXT"
TITLE="Component Repository"
HREF="cdl-component-repository.html"></HEAD
><BODY
CLASS="CHAPTER"
BGCOLOR="#FFFFFF"
TEXT="#000000"
LINK="#0000FF"
VLINK="#840084"
ALINK="#0000FF"
><DIV
CLASS="NAVHEADER"
><TABLE
SUMMARY="Header navigation table"
WIDTH="100%"
BORDER="0"
CELLPADDING="0"
CELLSPACING="0"
><TR
><TH
COLSPAN="3"
ALIGN="center"
>eCos User Guide</TH
></TR
><TR
><TD
WIDTH="10%"
ALIGN="left"
VALIGN="bottom"
><A
HREF="ecos-programming-concepts-and-techniques.html"
ACCESSKEY="P"
>Prev</A
></TD
><TD
WIDTH="80%"
ALIGN="center"
VALIGN="bottom"
></TD
><TD
WIDTH="10%"
ALIGN="right"
VALIGN="bottom"
><A
HREF="cdl-component-repository.html"
ACCESSKEY="N"
>Next</A
></TD
></TR
></TABLE
><HR
ALIGN="LEFT"
WIDTH="100%"></DIV
><DIV
CLASS="CHAPTER"
><H1
><A
NAME="CDL-CONCEPTS">Chapter 24. CDL Concepts</H1
><DIV
CLASS="TOC"
><DL
><DT
><B
>Table of Contents</B
></DT
><DT
><A
HREF="cdl-concepts.html#CDL-CONCEPTS-ABOUT"
>About this chapter</A
></DT
><DT
><A
HREF="cdl-component-repository.html"
>Component Repository</A
></DT
><DT
><A
HREF="cdl-component-definition-language.html"
>Component Definition Language</A
></DT
><DT
><A
HREF="cdl-packages.html"
>Packages</A
></DT
><DT
><A
HREF="cdl-configuration-items.html"
>Configuration Items</A
></DT
><DT
><A
HREF="cdl-conflicts.html"
>Conflicts</A
></DT
><DT
><A
HREF="cdl-templates.html"
>Templates</A
></DT
></DL
></DIV
><DIV
CLASS="SECT1"
><H1
CLASS="SECT1"
><A
NAME="CDL-CONCEPTS-ABOUT">About this chapter</H1
><P
>This chapter serves as a brief introduction to the
concepts involved in <SPAN
CLASS="PRODUCTNAME"
>eCos</SPAN
> (Embedded Configurable Operating
System). It describes the configuration architecture and the
underlying technology to a level required for the embedded
systems developer to configure <SPAN
CLASS="PRODUCTNAME"
>eCos</SPAN
>. It does not describe in
detail aspects such as how to write reusable components for
<SPAN
CLASS="PRODUCTNAME"
>eCos</SPAN
>: this information is given in the <I
CLASS="CITETITLE"
>Component
Writer’s Guide</I
>.</P
><DIV
CLASS="SECT2"
><H2
CLASS="SECT2"
><A
NAME="AEN1833">Background</H2
><P
>Software solutions for the embedded space place
particularly stringent demands on the developer, typically
represented as requirements for small memory footprint, high
performance and robustness. These demands are addressed in
<SPAN
CLASS="PRODUCTNAME"
>eCos</SPAN
> by providing the ability to perform compile-time
specialization: the developer can tailor the operating
system to suit the needs of the application. In order to
make this process manageable, <SPAN
CLASS="PRODUCTNAME"
>eCos</SPAN
> is built in the context
of a Configuration Infrastructure: a set of tools including
a <SPAN
CLASS="APPLICATION"
>Configuration Tool</SPAN
> and a formal
description of the process of configuration by means of a
<SPAN
CLASS="emphasis"
><I
CLASS="EMPHASIS"
>Component Definition Language</I
></SPAN
>.</P
></DIV
><DIV
CLASS="SECT2"
><H2
CLASS="SECT2"
><A
NAME="AEN1840">Configurations</H2
><P
><SPAN
CLASS="PRODUCTNAME"
>eCos</SPAN
> is tailored at source level (that is, before
compilation or assembly) in order to create an <SPAN
CLASS="PRODUCTNAME"
>eCos</SPAN
>
<SPAN
CLASS="emphasis"
><I
CLASS="EMPHASIS"
>configuration</I
></SPAN
>. In concrete terms, an
<SPAN
CLASS="PRODUCTNAME"
>eCos</SPAN
> configuration takes the form of a configuration save
file (with extension .ecc) and set of files used to build
user applications (including, when built, a library file
against which the application is linked). </P
></DIV
></DIV
></DIV
><DIV
CLASS="NAVFOOTER"
><HR
ALIGN="LEFT"
WIDTH="100%"><TABLE
SUMMARY="Footer navigation table"
WIDTH="100%"
BORDER="0"
CELLPADDING="0"
CELLSPACING="0"
><TR
><TD
WIDTH="33%"
ALIGN="left"
VALIGN="top"
><A
HREF="ecos-programming-concepts-and-techniques.html"
ACCESSKEY="P"
>Prev</A
></TD
><TD
WIDTH="34%"
ALIGN="center"
VALIGN="top"
><A
HREF="ecos-user-guide.html"
ACCESSKEY="H"
>Home</A
></TD
><TD
WIDTH="33%"
ALIGN="right"
VALIGN="top"
><A
HREF="cdl-component-repository.html"
ACCESSKEY="N"
>Next</A
></TD
></TR
><TR
><TD
WIDTH="33%"
ALIGN="left"
VALIGN="top"
><SPAN
CLASS="PRODUCTNAME"
>eCos</SPAN
> Programming Concepts and Techniques</TD
><TD
WIDTH="34%"
ALIGN="center"
VALIGN="top"
><A
HREF="ecos-programming-concepts-and-techniques.html"
ACCESSKEY="U"
>Up</A
></TD
><TD
WIDTH="33%"
ALIGN="right"
VALIGN="top"
>Component Repository</TD
></TR
></TABLE
></DIV
></BODY
></HTML
>⌨️ 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 + -