config-tool.sgml

开放源码实时操作系统源码.

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<part ID="THE-ECOS-CONFIGURATION-TOOL">
<TITLE>The eCos Configuration Tool</TITLE>

<!-- {{{ Getting Started                -->

<CHAPTER id="config-tool-getting-started">
<TITLE>Getting Started</TITLE>

<!-- ====================================================================== -->
    
<SECT1 id="config-tool-getting-started-intro">
<TITLE>Introduction</TITLE>

<PARA> The <productname>eCos</productname> <application>Configuration Tool</application> is used
	  to tailor <productname>eCos</productname> at source level, prior to compilation or
	  assembly, and provides a configuration file and a set of
	  files used to build user applications. The sources and other
	  files used for building a configuration are provided in a
	  <EMPHASIS>component repository</EMPHASIS>, which is loaded
	  when the <productname>eCos</productname> <APPLICATION>Configuration Tool</APPLICATION>
	  is invoked. The component repository includes a set of files
	  defining the structure of relationships between the
	  <application>Configuration Tool</application> and other components, and is written in a
	  <FIRSTTERM>Component Definition Language</FIRSTTERM> (<ACRONYM>CDL</ACRONYM>).
	  For a description of the concepts underlying component
	  configuration, see <xref linkend="cdl-concepts">.</PARA>
</SECT1>

<!-- ====================================================================== -->
    
<SECT1 id="config-tool-invoking">
<TITLE>Invoking the <productname>eCos</productname> <application>Configuration Tool</application></TITLE>

<SECT2>
<TITLE>On Linux</TITLE>

<PARA>Add the <productname>eCos</productname> <application>Configuration Tool</application> install directory to your PATH, for example:</PARA>

<PROGRAMLISTING>
export PATH=/opt/ecos/ecos<replaceable>&Version;</replaceable>/bin:$PATH
</PROGRAMLISTING>

<PARA>You may run configtool with zero, one or two arguments. You can specify the <productname>eCos</productname> repository
 location, and/or an <productname>eCos</productname> save file (extension .ecc) on the command line. The ordering of these
two arguments is not significant. For example:</PARA>

<PROGRAMLISTING>
configtool /opt/ecos/ecos<replaceable>&Version;</replaceable>/packages myfile.ecc
</PROGRAMLISTING>

<PARA>The <application>Configuration Tool</application> will be displayed (see <xref linkend="figure-configuration-tool">).</PARA>
</SECT2>

<SECT2>
<TITLE>On Windows</TITLE>

<PARA>There are two ways in which to invoke the <productname>eCos</productname> <application>Configuration Tool</application>:</PARA>
<ITEMIZEDLIST>
<LISTITEM>
<PARA>	      from the desktop explorer or program set up at installation
	      time (by default 
	      <EMPHASIS>Start</EMPHASIS>
	      -&gt;
	      <EMPHASIS>Programs</EMPHASIS>
	      -&gt;
	      <EMPHASIS>eCos</EMPHASIS>
	      -&gt;
	      <EMPHASIS>Configuration Tool</EMPHASIS>
	      ).</PARA>
</LISTITEM>
<LISTITEM>
<PARA>type (at a command prompt or in the 
	    <EMPHASIS>Start</EMPHASIS>
	    menu&rsquo;s 
	    <EMPHASIS>Run</EMPHASIS>
	    item): &lt;foldername&gt;&bsol;ConfigTool.exe where &lt;foldername&gt; is
	    the full path of the directory in which you installed the <productname>eCos</productname>
	    <application>Configuration Tool</application>.</PARA>
<!--
<para>
XXXXX Change location of configtool in line with installation
              instructions. XXXXX
</para>
-->
            
</LISTITEM>
<LISTITEM>
<PARA>The 
	    <application>Configuration Tool</application>
	    will be displayed (see <xref linkend="figure-configuration-tool">).</PARA>
</LISTITEM>
</ITEMIZEDLIST>

<PARA>
You may run configtool with zero, one or two arguments. You can specify the <productname>eCos</productname> repository
location, and/or an <productname>eCos</productname> save file (extension .ecc) on the command line. The ordering of these
two arguments is not significant. For example:</PARA>

<PROGRAMLISTING>
configtool "c:\Program Files\eCos\packages" myfile.ecc
</PROGRAMLISTING>

<!--        
        <para>
XXXXX Change location of eCos in line with installation instructions. XXXXX
        </para>
-->
        
<PARA>If you invoke the configuration tool from the command line with
<EMPHASIS>--help</EMPHASIS>, you will see this output:</PARA>

<PROGRAMLISTING>
Usage: eCos Configuration Tool [-h] [-e] [-v] [-c] [input file 1] [input file 2]
  -h  --help        	displays help on the command line parameters
  -e  --edit-only   	edit save file only
  -v  --version     	print version
  -c  --compile-help	compile online help only
</PROGRAMLISTING>

<PARA>This summarizes valid parameters and switches. Switches are shown with
both short form and long form.</PARA>

<PARA><EMPHASIS>--help</EMPHASIS> shows valid options and parameters, as above.</PARA>

<PARA><EMPHASIS>--edit-only</EMPHASIS> runs the <application>Configuration Tool</application> in a mode that
suppresses creation of a build tree, in case you only want to create and edit save files.</PARA>

<PARA><EMPHASIS>--version</EMPHASIS> shows version and build date information, and exits.</PARA>

<PARA><EMPHASIS>--compile-help</EMPHASIS> compiles help contents files from the HTML documentation
files that the tool finds in the <productname>eCos</productname> repository, and exits.</PARA>

<FIGURE id="figure-configuration-tool">
<TITLE><application>Configuration Tool</application></TITLE>
<GRAPHIC ENTITYREF="graphic1"></GRAPHIC>
</FIGURE>
</SECT2>
</SECT1>

<!-- ====================================================================== -->
    
    
<SECT1 id="config-tool-component-repository">
<TITLE>The Component Repository</TITLE>
<PARA>When you invoke the <productname>eCos</productname> <application>Configuration Tool</application>, it accesses the Component
	  Repository, a read-only location of configuration
	  information. For an explanation of &ldquo;Component
	  Repository&rdquo; see <xref linkend="cdl-concepts">.</PARA>
<PARA>The <productname>eCos</productname> <application>Configuration Tool</application> will look
	  for a component repository using (in descending order of preference):</PARA>
<ITEMIZEDLIST>
<LISTITEM>
<PARA>A location specified on the command line
</PARA>
</LISTITEM>
<LISTITEM>
<PARA>The component repository most recently used by the
current user</PARA>
</LISTITEM>
<LISTITEM>
<PARA>An <productname>eCos</productname> distribution under <filename>/opt/ecos</filename> (under
Linux) or a default location set by the installation procedure (under
Windows)</PARA>
</LISTITEM>
<LISTITEM>
<PARA>User input</PARA>
</LISTITEM>
</ITEMIZEDLIST>
<PARA>The final case above will normally only occur if the previous
	  repository has been moved or (under Windows) installation information stored in
	  the Windows registry has been modified; it will result in a dialog box
being displayed that allows you to specify the repository location:</PARA>
<FIGURE>
<TITLE>Repository relocation dialog box</TITLE>
<GRAPHIC ENTITYREF="graphic2"></GRAPHIC>
</FIGURE>
<PARA>Note that in order to use the <productname>eCos</productname> <application>Configuration Tool</application> you are obliged to provide a
	  valid repository location. </PARA>
<PARA>In the rare event that you subsequently wish to change
	  the component location, select
	  <EMPHASIS>Build</EMPHASIS>-&gt;<EMPHASIS>Repository</EMPHASIS> 
	  and the above dialog box will then be displayed.</PARA>
<PARA>You can check the location of the current repository, the current save file
path, and the current hardware template and default package,
by selecting <EMPHASIS>Help</EMPHASIS>-&gt;<EMPHASIS>Repository Information...</EMPHASIS>.
A summary will be displayed.</PARA>
</SECT1>

<!-- ====================================================================== -->
   
    
<SECT1 ID="config-tool-documents">
<TITLE><productname>eCos</productname> <application>Configuration Tool</application> Documents</TITLE>
<SECT2>
<TITLE>Configuration Save File</TITLE>
<PARA><productname>eCos</productname> configuration settings and other information
	    (such as disabled conflicts) that are set using the
	    <productname>eCos</productname> <application>Configuration Tool</application> are saved to
	    a file between sessions. By default, when the
	    <productname>eCos</productname> <application>Configuration Tool</application> is first
	    invoked, it reads and displays information from the
	    Component Registry and displays the information in an
	    untitled blank document. You can perform the following
	    operations on a document:</PARA>
<SECT3>
<TITLE>Save the currently active document</TITLE>
<PARA>Use the &ldquo;<EMPHASIS>File-&gt;Save</EMPHASIS>&rdquo; menu
	    item or click the <EMPHASIS>Save Document</EMPHASIS> icon on the
	    toolbar; if the current document is unnamed, you will be prompted
	    to supply a name for the configuration save file.</PARA>
<FIGURE>
<TITLE>Save As dialog box</TITLE>
<GRAPHIC ENTITYREF="graphic3"></GRAPHIC>
</FIGURE>
</SECT3>
<SECT3>
<TITLE>Open an existing document</TITLE>
<PARA>Select <EMPHASIS>File</EMPHASIS>-&gt;<EMPHASIS>Open</EMPHASIS>,
	    or click the <EMPHASIS>Open Document</EMPHASIS> icon on the toolbar.
	    You will be prompted to supply a name for the configuration save
	    file. </PARA>
<FIGURE>
<TITLE>Open dialog box</TITLE>
<GRAPHIC ENTITYREF="graphic4"></GRAPHIC>
</FIGURE>
</SECT3>
<SECT3>
<TITLE>Open a document you have used recently</TITLE>
<PARA>Click its name at the bottom of the
	    <EMPHASIS>File</EMPHASIS> menu. </PARA>
<PARA>Documents may also be opened by:</PARA>
<ITEMIZEDLIST>
<LISTITEM>
<PARA>double-clicking a Configuration Save File in the desktop
explorer (Windows only);</PARA>
</LISTITEM>
<LISTITEM>
<PARA>invoking the <productname>eCos</productname>
<application>Configuration Tool</application>
with the name of a Configuration File as command-line argument,
or by creating a shortcut to the <productname>eCos</productname> <application>Configuration Tool</application> with such an argument
(under Windows or a suitable Linux desktop environment).</PARA>
</LISTITEM>
</ITEMIZEDLIST>
</SECT3>
<SECT3>
<TITLE>Create a new blank document based on the Component
	      Registry</TITLE>
<PARA>Select <EMPHASIS>File</EMPHASIS>-&gt;<EMPHASIS>New</EMPHASIS>,
or click the <EMPHASIS>New Document</EMPHASIS> icon on the toolbar.</PARA>
</SECT3>
<SECT3>
<TITLE>Save to a different file name</TITLE>
<PARA>Select <EMPHASIS>File</EMPHASIS>-&gt;<EMPHASIS>Save
		As</EMPHASIS>. You will be prompted to supply a new
	      name for the configuration save file.</PARA>
</SECT3>
</SECT2>
<SECT2>
<TITLE>Build and Install Trees</TITLE>
<PARA>The location of the build and install trees are
	    derived from the <productname>eCos</productname> save file name as illustrated in the
	    following example:</PARA>
<PARA>Save file name = &ldquo;c:&bsol;My
	    eCos&bsol;config1.ecc&rdquo;</PARA>
<PARA>Install tree folder = &ldquo;c:&bsol;My
	    eCos&bsol;config1_install&rdquo;</PARA>
<PARA>Build tree folder = &ldquo;c:&bsol;My
	    eCos&bsol;config1_build&rdquo;</PARA>
<PARA>These names are automatically generated from the name
	    of the save file.</PARA>
<PARA>See also <xref linkend="cdl-concepts">.</PARA>
</SECT2>
</SECT1>
</CHAPTER>

<!-- }}} -->
<!-- {{{ Getting Help                   -->

<CHAPTER id="config-tool-getting-help">
<TITLE>Getting Help</TITLE>

<PARA>The <productname>eCos</productname> <application>Configuration Tool</application> contains
several methods for accessing online help.</PARA>

<!-- ================================================== -->

<SECT1 id="config-tool-context-help-dialogs">

<TITLE>Context-sensitive Help for Dialogs</TITLE>
<PARA>Most dialogs displayed by the <productname>eCos</productname> <application>Configuration Tool</application> are supplied
with context-sensitive help. You can then get help relating
to any control within the current dialog box by</PARA>

<ITEMIZEDLIST>
<LISTITEM>
<PARA>Right-clicking the control (or pressing 
	      <EMPHASIS>F1</EMPHASIS>
	      )</PARA>
<PARA>A &ldquo;What&rsquo;s This?&rdquo; popup menu will
	  be displayed. Click the menu to display a brief description of the
	  function of the selected control.</PARA>
</LISTITEM>
<LISTITEM>
<PARA>Clicking the question mark icon in the dialog
	    caption bar (Windows) or the question mark button on the dialog (Linux).</PARA>
<PARA>A question mark cursor will be displayed. Click on
	      any control to display a brief description of its
	      function.</PARA>
</LISTITEM>
</ITEMIZEDLIST>
<PARA>Some dialogs may have a <EMPHASIS>Help</EMPHASIS>
	  button. You can press this to display a more general
	  description of the function of the dialog box as a whole.
	  This help will be in HTML form; for more information, see
	  below.</PARA>
</SECT1>

<!-- ================================================== -->

<SECT1 id="config-tool-context-help-otherwin">
<TITLE>Context-sensitive Help for Other Windows</TITLE>
<PARA>In the <EMPHASIS>Help</EMPHASIS> menu, click
	  <EMPHASIS>Help On...</EMPHASIS>
<!--
 (or press
	  <EMPHASIS>F1</EMPHASIS>)
-->
and then click on a window (or click on the arrow/question mark button
on the toolbar, then click on a window). A small popup window page describing the
window will be displayed. The same thing can be achieved by right-clicking
on a window and clicking on <EMPHASIS>What's This?</EMPHASIS>.
<!--
	  This help will normally be in HTML format; for more
	  information, see <xref linkend="methods-of-displaying-html-help">.
-->
</PARA>
</SECT1>
<SECT1 id="config-tool-context-help-config-items">
<TITLE>Context-sensitive Help for Configuration Items</TITLE>
<PARA>In the configuration window, right-click on a configuration
item (or use <EMPHASIS>Shift+F10</EMPHASIS>). A context
menu will be displayed; select <EMPHASIS>Visit Documentation</EMPHASIS> 
to display the page in the <productname>eCos</productname> documentation that most closely
corresponds to the selected item.</PARA>
</SECT1>

<SECT1 id="methods-of-displaying-html-help">
<TITLE>Methods of Displaying HTML Help</TITLE>