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<!-- Copyright (C) 2003 Red Hat, Inc.                                -->
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>SH3/EDK7708 Hardware Setup</TITLE
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>eCos User Guide</TH
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CLASS="SECT1"
><H1
CLASS="SECT1"
><A
NAME="SETUP-SH-EDK7708">SH3/EDK7708 Hardware Setup</H1
><P
>The eCos Developer&#8217;s Kit package comes with a ROM
which provides GDB support for the Hitachi EDK7708 board (a big-endian
and a little-endian version). Images of these  ROMs are also provided
at <TT
CLASS="FILENAME"
>loaders/sh-edk7708/gdbload.bin</TT
> and
	  <TT
CLASS="FILENAME"
>loaders/sh-edk7708le/gdbload.bin</TT
> under
the root of your eCos installation.</P
><P
>The ROM is installed to socket U6 on the board. When using
the big-endian ROM, jumper 9 must be set to 2-3. When using the
little-endian ROM, jumper 9 must be set to 1-2. Attention should
be paid to the correct orientation of the ROM during installation.
Only replace the board&quot;s existing ROM using a proper PLCC extraction
tool, as the socket would otherwise risk being damaged. </P
><P
>If you are going to program a new ROM or FLASH using the binary
image, you may have to experiment to get the right byte-order in
the device. Depending on the programming software you use, it might
be necessary to enable byte-swapping.  If the GDB stub ROM/FLASH
you program does not work, try reversing the byte-order.</P
><P
>The GDB stub in the EPROM allows communication with GDB using
the serial port at connector J1. The communication parameters are
fixed at 38400 baud, 8 data bits, no parity bit and 1 stop bit (8-N-1).
No flow control is employed. Connection to the host computer should
be made using the dedicated serial cable included in the EDK package. </P
><DIV
CLASS="SECT2"
><H2
CLASS="SECT2"
><A
NAME="AEN4067">Installing the Stubs into FLASH</H2
><DIV
CLASS="SECT3"
><H3
CLASS="SECT3"
><A
NAME="AEN4069">Preparing the Binaries</H3
><P
>These two binary preparation steps are not strictly necessary
as the eCos distribution ships with pre-compiled binaries in the
directory loaders/sh-edk7708 and loaders/sh-edk7708le
relative to the installation root.</P
><DIV
CLASS="SECT4"
><H4
CLASS="SECT4"
><A
NAME="AEN4072">Building the ROM images with the eCos Configuration Tool</H4
><P
></P
><OL
TYPE="1"
><LI
><P
>Start with a new document - selecting the 
<SPAN
CLASS="emphasis"
><I
CLASS="EMPHASIS"
>File-&#62;New</I
></SPAN
>
 menu item if necessary to do this.</P
></LI
><LI
><P
>Choose the 
<SPAN
CLASS="emphasis"
><I
CLASS="EMPHASIS"
>Build-&#62;Templates</I
></SPAN
>
 menu item, and then select the SH EDK7708 hardware.</P
></LI
><LI
><P
>While still displaying the 
<SPAN
CLASS="emphasis"
><I
CLASS="EMPHASIS"
>Build-&#62;Templates</I
></SPAN
>
 dialog box, select the &#8220;stubs&#8221; package template
to build a GDB stub. Click 
<SPAN
CLASS="emphasis"
><I
CLASS="EMPHASIS"
>OK</I
></SPAN
>.</P
></LI
><LI
><P
>If building a little-endian image, disable the &#8220;Use
big-endian mode&#8221; option in the SH EDK7708 HAL (CYGHWR_HAL_SH_BIGENDIAN).</P
></LI
><LI
><P
>Build eCos using 
<SPAN
CLASS="emphasis"
><I
CLASS="EMPHASIS"
>Build-&#62;Library</I
></SPAN
>. </P
></LI
><LI
><P
>When the build completes, the image files can be found
in the bin/ subdirectory of the install tree. GDB stub
ROM images have the prefix &#8220;gdb_module&#8221;.</P
></LI
></OL
></DIV
><DIV
CLASS="SECT4"
><H4
CLASS="SECT4"
><A
NAME="AEN4092">Building the ROM images with ecosconfig</H4
><P
></P
><OL
TYPE="1"
><LI
><P
>Make an empty directory to contain the build tree,
and cd into it.</P
></LI
><LI
><P
>To build a GDB stub ROM image, enter the command: 
 
<TABLE
BORDER="5"
BGCOLOR="#E0E0F0"
WIDTH="70%"
><TR
><TD
><PRE
CLASS="PROGRAMLISTING"
>$ ecosconfig new edk7708 stubs</PRE
></TD
></TR
></TABLE
>
 </P
></LI
><LI
><P
>If building a little-endian image, uncomment the user
value in ecos.ecc for CYGHWR_HAL_SH_BIGENDIAN
and change it to 0.   </P
></LI
><LI
><P
>Enter the commands:
 
<TABLE
BORDER="5"
BGCOLOR="#E0E0F0"
WIDTH="70%"
><TR
><TD
><PRE
CLASS="PROGRAMLISTING"
>$ ecosconfig tree      
$ make </PRE
></TD
></TR
></TABLE
></P
></LI
><LI
><P
>When the build completes, the image files can be found
in the bin/ subdirectory of the install tree. GDB stub
ROM images have the  prefix &#8220;gdb_module&#8221;.</P
></LI
></OL
></DIV
></DIV
><DIV
CLASS="SECT3"
><H3
CLASS="SECT3"
><A
NAME="AEN4107">Installing the Stubs into ROM or FLASH</H3
><P
></P
><OL
TYPE="1"
><LI
><P
>Program the binary image file gdb_module.bin
into ROM or FLASH referring to the instructions of your ROM programmer.</P
></LI
><LI
><P
>Plug the ROM/FLASH into socket U6. If the image
is little-endian set jumper 9 to 1-2. If the image is big-endian
set jumper 9 to 2-3.</P
></LI
></OL
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