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><A
NAME="COARSE-GRAINED-CONFIGURATION">Coarse-grained Configuration</H1
><P
>Coarse-grained configuration of
	  an <SPAN
CLASS="PRODUCTNAME"
>eCos</SPAN
> system means making configuration changes using the
	  <B
CLASS="COMMAND"
>ecosconfig</B
> tool. These changes
	  include: </P
><P
></P
><OL
TYPE="1"
><LI
><P
>switching to different target hardware</P
></LI
><LI
><P
>switching to a different template</P
></LI
><LI
><P
>adding or removing a package</P
></LI
><LI
><P
>changing the version of a package</P
></LI
></OL
><P
>Whenever <B
CLASS="COMMAND"
>ecosconfig</B
> generates or
	  updates an <SPAN
CLASS="PRODUCTNAME"
>eCos</SPAN
> configuration, it generates a configuration
	  save file.</P
><P
>Suppose that the configuration was first created using
	  the following command line: </P
><TABLE
BORDER="5"
BGCOLOR="#E0E0F0"
WIDTH="70%"
><TR
><TD
><PRE
CLASS="SCREEN"
>$ ecosconfig new stdeval1</PRE
></TD
></TR
></TABLE
><P
>To change the target hardware to the Cogent CMA28x
	  PowerPC board, the following command would be needed:
	</P
><TABLE
BORDER="5"
BGCOLOR="#E0E0F0"
WIDTH="70%"
><TR
><TD
><PRE
CLASS="SCREEN"
>$ ecosconfig target cma28x</PRE
></TD
></TR
></TABLE
><P
>To switch to the PowerPC simulator instead: </P
><TABLE
BORDER="5"
BGCOLOR="#E0E0F0"
WIDTH="70%"
><TR
><TD
><PRE
CLASS="SCREEN"
>$ ecosconfig target psim</PRE
></TD
></TR
></TABLE
><P
>As the hardware changes, hardware-related packages such as
the HAL packages and device drivers will be added to and removed
from the configuration as appropriate. </P
><P
>To remove any package from the current configuration, use
the <B
CLASS="COMMAND"
>remove</B
> command: </P
><TABLE
BORDER="5"
BGCOLOR="#E0E0F0"
WIDTH="70%"
><TR
><TD
><PRE
CLASS="SCREEN"
>$ ecosconfig remove uitron</PRE
></TD
></TR
></TABLE
><P
>You can disable multiple packages using multiple arguments,
for example: </P
><TABLE
BORDER="5"
BGCOLOR="#E0E0F0"
WIDTH="70%"
><TR
><TD
><PRE
CLASS="SCREEN"
>$ ecosconfig remove uitron libm</PRE
></TD
></TR
></TABLE
><P
>If this turns out to have been a mistake then you can
	  re-enable one or more packages with the
	  <B
CLASS="COMMAND"
>add</B
> command: </P
><TABLE
BORDER="5"
BGCOLOR="#E0E0F0"
WIDTH="70%"
><TR
><TD
><PRE
CLASS="SCREEN"
>$ ecosconfig add libm</PRE
></TD
></TR
></TABLE
><P
>Changing the desired version for a package is also
	  straightforward:</P
><TABLE
BORDER="5"
BGCOLOR="#E0E0F0"
WIDTH="70%"
><TR
><TD
><PRE
CLASS="SCREEN"
>$ ecosconfig version v2_1 kernel</PRE
></TD
></TR
></TABLE
><P
>It is necessary to regenerate the build tree and header
	  files following any changes to the configuration before
	  rebuilding <SPAN
CLASS="PRODUCTNAME"
>eCos</SPAN
>:</P
><TABLE
BORDER="5"
BGCOLOR="#E0E0F0"
WIDTH="70%"
><TR
><TD
><PRE
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>$ ecosconfig tree</PRE
></TD
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