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>SH4/CQ7750 Hardware Setup</TITLE
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><H1
CLASS="SECT1"
><A
NAME="SETUP-SH-CQ7750">SH4/CQ7750 Hardware Setup</H1
><DIV
CLASS="SECT2"
><H2
CLASS="SECT2"
><A
NAME="AEN4195">Preparing the board</H2
><P
>Make sure the DIP switches on the board are set as follows:
</P
><TABLE
BORDER="5"
BGCOLOR="#E0E0F0"
WIDTH="70%"
><TR
><TD
><PRE
CLASS="PROGRAMLISTING"
>SW1-1 ON
SW1-2 OFF
SW1-3 ON
SW1-4 OFF</PRE
></TD
></TR
></TABLE
><TABLE
BORDER="5"
BGCOLOR="#E0E0F0"
WIDTH="70%"
><TR
><TD
><PRE
CLASS="PROGRAMLISTING"
>SW2-1 ON
SW2-2 ON
SW2-3 OFF
SW2-4 OFF</PRE
></TD
></TR
></TABLE
><P
>If you are using a straight through serial cable which has
flow control lines, you will also need to cut JP12 (5-6) as the
flow control lines can cause NMIs.</P
></DIV
><DIV
CLASS="SECT2"
><H2
CLASS="SECT2"
><A
NAME="AEN4201">eCos GDB Stubs</H2
><P
>The eCos installation CD contains a copy of the eCos GDB stubs
in binary format which must be programmed into an EPROM or FLASH
and installed on the board.</P
><DIV
CLASS="SECT3"
><H3
CLASS="SECT3"
><A
NAME="AEN4204">Preparing the GDB stubs</H3
><P
>These stub preparation steps are not strictly necessary as
the eCos distribution ships with pre-compiled stubs in the directory
loaders/sh3-cq7708 relative to the installation root.</P
></DIV
><DIV
CLASS="SECT3"
><H3
CLASS="SECT3"
><A
NAME="AEN4207">Building the GDB stub image with the eCos Configuration Tool</H3
><P
></P
><OL
TYPE="1"
><LI
><P
>Start with a new document - selecting the
<SPAN
CLASS="emphasis"
><I
CLASS="EMPHASIS"
>File->New</I
></SPAN
>
menu item if necessary to do this.</P
></LI
><LI
><P
>Choose the
<SPAN
CLASS="emphasis"
><I
CLASS="EMPHASIS"
>Build->Templates</I
></SPAN
>
menu item, and then select the SH3 cq7708 hardware.</P
></LI
><LI
><P
>While still displaying the
<SPAN
CLASS="emphasis"
><I
CLASS="EMPHASIS"
>Build->Templates</I
></SPAN
>
dialog box, select the stubs package template to build a GDB stub.
Click
<SPAN
CLASS="emphasis"
><I
CLASS="EMPHASIS"
>OK</I
></SPAN
>.</P
></LI
><LI
><P
> Build eCos stubs using
<SPAN
CLASS="emphasis"
><I
CLASS="EMPHASIS"
>Build->Library</I
></SPAN
>.</P
></LI
><LI
><P
> When the build completes, the image files can be found
in the
<TT
CLASS="FILENAME"
>bin/</TT
>
subdirectory of the install tree. GDB stub images have the prefix
<TT
CLASS="FILENAME"
>gdb_module</TT
>.</P
></LI
></OL
></DIV
><DIV
CLASS="SECT3"
><H3
CLASS="SECT3"
><A
NAME="AEN4227">Building the GDB stub image with ecosconfig</H3
><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 cq7708 stubs </PRE
></TD
></TR
></TABLE
></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
<TT
CLASS="FILENAME"
>bin/</TT
>
subdirectory of the install tree. GDB stub images have the prefix
<TT
CLASS="FILENAME"
>gdb_module</TT
>. </P
></LI
></OL
></DIV
></DIV
><DIV
CLASS="SECT2"
><H2
CLASS="SECT2"
><A
NAME="AEN4242">Programming the stubs in EPROM/FLASH</H2
><P
>The board can use different sizes of ROMs. Use this table
to adjust the board’s jumpers to the ROM sizes you are
using.</P
><TABLE
BORDER="5"
BGCOLOR="#E0E0F0"
WIDTH="70%"
><TR
><TD
><PRE
CLASS="PROGRAMLISTING"
>size(kbit) JP7 JP9 JP10 JP11
256 2-3 2-3 open open
512 1-2 2-3 open open
1000 1-2 open open 2-3
2000 1-2 1-2 open 2-3
4000 1-2 1-2 short 2-3
8000 1-2 1-2 short 1-2</PRE
></TD
></TR
></TABLE
><P
>There are two ways to program the stubs. We advise you to
use method 1, since it is simpler. Method 2 is unsupported and requires
a bit of fiddling.</P
><P
><SPAN
CLASS="emphasis"
><I
CLASS="EMPHASIS"
>Method 1: </I
></SPAN
> </P
><P
>Program the binary stub image into two EPROMs, E and O. EPROM
E should contain the even bytes, and O the odd bytes (your EPROM
programmer should have the ability to split the image).</P
><P
>EPROM E should be installed in socket IC8, and EPROM O should
be installed in socket IC4.</P
><P
>Set JP6 to 16 bit mode (1-2 soldered, 2-3 cut) Set SW1-4
to ON and SW2-1 to OFF.</P
><P
></P
><P
><SPAN
CLASS="emphasis"
><I
CLASS="EMPHASIS"
>Method2: </I
></SPAN
> </P
><P
>Assuming that the stub binary is smaller than 32 KB, you can
install it in a single EPROM.</P
><P
>Compile the <TT
CLASS="FILENAME"
>mkcqrom.c</TT
> program
found in the <TT
CLASS="FILENAME"
>misc</TT
> directory.</P
><P
>Use it to convert the binary image to the required format.
See the <TT
CLASS="FILENAME"
>mkcqrom.c</TT
> source for a
description of what is done, and why it is necessary. </P
><TABLE
BORDER="5"
BGCOLOR="#E0E0F0"
WIDTH="70%"
><TR
><TD
><PRE
CLASS="PROGRAMLISTING"
> % mkcqrom gdb_module.bin gdb_mangled.bin</PRE
></TD
></TR
></TABLE
><P
>Program the <TT
CLASS="FILENAME"
>gdb_mangled.bin</TT
> file
into an EPROM and install it in socket IC4</P
><P
>Set JP6 to 8 bit mode (cut 1-2, solder 2-3)</P
><P
>The GDB stubs allow communication with GDB using the serial
port at connector CN7. 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 a straight through serial cable.</P
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