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>AM33 STB Hardware Setup</TITLE
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><H1
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><A
NAME="SETUP-AM33-STB">AM33 STB Hardware Setup</H1
><P
>The Matsushita AM33 STB System Reference Board may be used
in two modes: via a JTAG debugger, or by means of a GDB stub ROM.</P
><DIV
CLASS="SECT2"
><H2
CLASS="SECT2"
><A
NAME="AEN3221">Use with GDB Stub ROM</H2
><P
>The eCos Developer’s Kit package comes with a ROM
image which provides GDB support for
the Matsushita(R) AM33 STB System Reference Board. To install the
GDB stub ROM requires the use of the JTAG debugger and the Flash ROM
programming code available from Matsushita. An image of this ROM
is also provided at <TT
CLASS="FILENAME"
>loaders/am33-stb/gdbload.bin</TT
> under
the root of your eCos installation.</P
><P
>Ensure that there is a Flash ROM card in MAIN MEMORY SLOT <0>.
Follow the directions for programming a Flash ROM supplied with
the programming software.</P
><P
>The final programming of the ROM will need to be done with
a command similar to the following:</P
><TABLE
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BGCOLOR="#E0E0F0"
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><TR
><TD
><PRE
CLASS="PROGRAMLISTING"
>fdown "gdbload.bin",0x80000000,16,1</PRE
></TD
></TR
></TABLE
><P
>Once the ROM has been programmed, close down the JTAG debugger,
turn the STB off, and disconnect the JTAG cable. Ensure that the
hardware switches are in the following configuration:</P
><TABLE
BORDER="5"
BGCOLOR="#E0E0F0"
WIDTH="70%"
><TR
><TD
><PRE
CLASS="PROGRAMLISTING"
>U U D D D U D D
D = lower part of rocker switch pushed in
U = upper part of rocker switch pushed in</PRE
></TD
></TR
></TABLE
><P
>This is also the configuration required by the Flash programming
code, so it should not be necessary to change these.</P
><P
>Restart the STB and the stub ROM will now be able to communicate
with <SPAN
CLASS="PRODUCTNAME"
>GDB</SPAN
>. eCos programs should be built
with RAM startup.</P
><P
>Programs can then be downloaded via a standard RS232 null
modem serial cable connected to the SERIAL1 connector on the STB
front panel (the AM33"s serial port 0). This line is programmed
to run at 38400 baud, 8 data bits, no parity and 1 stop bit (8-N-1)
with no flow control. A gender changer may also be required. Diagnostic
output will be output to GDB using the same connection.</P
><P
>This procedure also applies for programming ROM startup eCos
programs into ROM, given a binary format image of the program from<TABLE
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WIDTH="70%"
><TR
><TD
><PRE
CLASS="PROGRAMLISTING"
> mn10300-elf-objcopy.</PRE
></TD
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></P
></DIV
><DIV
CLASS="SECT2"
><H2
CLASS="SECT2"
><A
NAME="AEN3236">Use with the JTAG debugger</H2
><P
>To use eCos from the JTAG debugger, executables must be built
with ROM startup and then downloaded via the JTAG debugger. For
this to work there must be an SDRAM memory card in SUB MEMORY SLOT <0> and
the hardware switches on the front panel set to the following: </P
><TABLE
BORDER="5"
BGCOLOR="#E0E0F0"
WIDTH="70%"
><TR
><TD
><PRE
CLASS="PROGRAMLISTING"
>D U D D D U D D
D = lower part of rocker switch pushed in
U = upper part of rocker switch pushed in</PRE
></TD
></TR
></TABLE
><P
>Connect the JTAG unit and run the debugger as described in
the documentation that comes with it.</P
><P
>eCos executables should be renamed to have a “.out” extension
and may then be loaded using the debugger"s “l” or “lp” commands.</P
><P
>Diagnostic output generated by the program will be sent out
of the AM33"s serial port 0 which is connected to the SERIAL1
connector on the STB front panel. This line is programmed to run
at 38400 baud, 8 data bits, no parity, and one stop bit (8-N-1)
with no flow control. Connection to the host computer should be
using a standard RS232 null modem serial cable. A gender changer
may also be required.</P
></DIV
><DIV
CLASS="SECT2"
><H2
CLASS="SECT2"
><A
NAME="AEN3243">Building the GDB stub ROM image</H2
><P
>eCos comes with a pre-built GDB stub ROM image for the AM33-STB
platform. This can be found at <TT
CLASS="FILENAME"
>loaders/am33-stb/gdbload.bin</TT
> relative
to the eCos installation directory.</P
><P
>If necessary, the ROM image can be re-built as follows:</P
><P
></P
><OL
TYPE="1"
><LI
><P
> On Windows hosts, open a Bash session using
<SPAN
CLASS="emphasis"
><I
CLASS="EMPHASIS"
>Start->Programs->Red Hat eCos->eCos
Development Environment</I
></SPAN
></P
></LI
><LI
><P
>Create a build directory and cd into it</P
></LI
><LI
><P
>Run (all as one line):
<TABLE
BORDER="5"
BGCOLOR="#E0E0F0"
WIDTH="70%"
><TR
><TD
><PRE
CLASS="PROGRAMLISTING"
>cygtclsh80 BASE_DIR/packages/pkgconf.tcl \
--target=mn10300_am33 --platform stb --startup rom \
--disable-kernel --disable-uitron --disable-libc --disable-libm \
--disable-io --disable-io_serial --disable-wallclock
--disable-watchdog</PRE
></TD
></TR
></TABLE
>
</P
><P
>where BASE_DIR is the path to the eCos installation
directory.</P
></LI
><LI
><P
>Edit the configuration file
<TT
CLASS="FILENAME"
>pkgconf/hal.h</TT
>
in the build directory tree by ensuring the following configuration
options are set as follows:
<TABLE
BORDER="5"
BGCOLOR="#E0E0F0"
WIDTH="70%"
><TR
><TD
><PRE
CLASS="PROGRAMLISTING"
>#define CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS
#define CYGDBG_HAL_DEBUG_GDB_BREAK_SUPPORT
#undef CYGDBG_HAL_DEBUG_GDB_CTRLC_SUPPORT
#define CYGDBG_HAL_DEBUG_GDB_THREAD_SUPPORT
#define CYG_HAL_ROM_MONITOR</PRE
></TD
></TR
></TABLE
>
</P
></LI
><LI
><P
>Run: make</P
></LI
><LI
><P
>Run: make -C hal/common/current/current/src/stubrom</P
></LI
><LI
><P
>The file
<TT
CLASS="FILENAME"
>hal/common/current/src/stubrom</TT
>
will be an ELF format executable of the ROM image. Use mn10300-elf-objcopy to
convert this to the appropriate format for loading into the Matsushita
FLASH ROM programmer, mode “binary” in this case:
<TABLE
BORDER="5"
BGCOLOR="#E0E0F0"
WIDTH="70%"
><TR
><TD
><PRE
CLASS="PROGRAMLISTING"
>$ mn10300-elf-objcopy -O binary hal/common/current/src/stubrom/ \
stubrom stubrom.img</PRE
></TD
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