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>StrongARM EBSA-285 Hardware Setup</TITLE
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>eCos User Guide</TH
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><A
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>Prev</A
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>Appendix A. Target Setup</TD
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><DIV
CLASS="SECT1"
><H1
CLASS="SECT1"
><A
NAME="SETUP-ARM-EBSA285">StrongARM EBSA-285 Hardware Setup</H1
><P
>The eCos Developer’s Kit package comes with a ROM
image which provides GDB support for
the Intel® StrongARM® Evaluation Board EBSA-285.
Both eCos and the Stub ROM image assume the clocks are: 3.6864
MHz PLL input for generating the core clock, and 50MHz osc input
for external clocks. An image of this ROM is also provided at <TT
CLASS="FILENAME"
>loaders/arm-ebsa285/gdbload.bin</TT
> under
the root of your eCos installation.</P
><P
>The ROM monitor image (an eCos GDB
stub) provided for the EBSA-285 board must be programmed into the
flash, replacing the Angel monitor on the board. Please refer to
the section titled "Loading the ROM Image into On-Board flash" on how
to program the ROM onto the board.</P
><P
>The Stub ROM allows communication with GDB via the serial
connector on the bulkhead mounting bracket COM0. 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.</P
><DIV
CLASS="SECT2"
><H2
CLASS="SECT2"
><A
NAME="AEN3981">Building the GDB Stub FLASH ROM images</H2
><P
>Pre-built GDB stubs images are provided in the directory loaders/arm-ebsa285 relative
to the root of your eCos installation, but here are instructions
on how to rebuild them if you should ever need to.</P
></DIV
><DIV
CLASS="SECT2"
><H2
CLASS="SECT2"
><A
NAME="AEN3984">Building the GDB Stubs with the eCos Configuration Tool</H2
><P
></P
><OL
TYPE="1"
><LI
><P
>Start with a new document - selecting the
<SPAN
CLASS="emphasis"
><I
CLASS="EMPHASIS"
>File</I
></SPAN
>
->
<SPAN
CLASS="emphasis"
><I
CLASS="EMPHASIS"
>New</I
></SPAN
>
menu item if necessary to do this.</P
></LI
><LI
><P
>Choose the
<SPAN
CLASS="emphasis"
><I
CLASS="EMPHASIS"
>Build</I
></SPAN
>
->
<SPAN
CLASS="emphasis"
><I
CLASS="EMPHASIS"
>Templates</I
></SPAN
>
menu item, and then select the StrongARM EBSA285 hardware.</P
></LI
><LI
><P
>While still displaying the
<SPAN
CLASS="emphasis"
><I
CLASS="EMPHASIS"
>Build</I
></SPAN
>
->
<SPAN
CLASS="emphasis"
><I
CLASS="EMPHASIS"
>Templates</I
></SPAN
>
dialog box, select the "stubs" package template to build a GDB
stub image. Click
<SPAN
CLASS="emphasis"
><I
CLASS="EMPHASIS"
>OK</I
></SPAN
>.</P
></LI
><LI
><P
>Build eCos using
<SPAN
CLASS="emphasis"
><I
CLASS="EMPHASIS"
>Build</I
></SPAN
>
->
<SPAN
CLASS="emphasis"
><I
CLASS="EMPHASIS"
>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. The GDB stub
ROM images have the prefix "gdb_module".</P
></LI
></OL
></DIV
><DIV
CLASS="SECT2"
><H2
CLASS="SECT2"
><A
NAME="AEN4006">Building the GDB Stub ROMs with ecosconfig</H2
><P
>(See “Using ecosconfig on UNIX” on page 72)</P
><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 ebsa285 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 bin/ subdirectory of the install tree. The GDB stub
ROM images have the prefix "gdb_module".</P
></LI
></OL
></DIV
><DIV
CLASS="SECT2"
><H2
CLASS="SECT2"
><A
NAME="AEN4020">Loading the ROM Image into On-board Flash</H2
><P
>There are several ways to install the eCos gdb stub ROM image
in the EBSA board’s flash memory. Once installed, the gdb
stub ROM provides standard eCos download and debug via the EBSA
board"s serial port. The options available include the
Linux based EBSA flash upgrade utility provided by Red Hat, direct writing
of the flash via MultiICE (JTAG) hardware debugger, and other flash management
utilities from Intel (these only support DOS, and proprietary ARM tools
and image formats). Only the Red Hat flash upgrade tool is supported
and tested in this release.</P
><P
>The flash upgrade tool requires the EBSA board to be configured
as a PCI slave (rather than a master, its normal operating mode)
and plugged into a Linux host computer"s PCI bus.</P
><P
>Configuring the board for flash loading: Follow the instructions
in the EBSA-285 Reference Manual, pages A-2 and A-3 to configure
the board as an add-in card, and enable flash blank programming.
Briefly: assuming the board was in the default setting to execute
as a bus master ("Host Bridge") make jumper 9 (J9), move jumper
10 (J10) to external reset (PCI_RST), and move jumper 15
(J15) link 4-6-5 to connect 5-6 instead of 4-6.</P
><P
>Configuring the board for execution of eCos programs: Follow
the instructions in the EBSA-285 Reference Manual, pages A-2 and
A-3 to configure the board as a "Host Bridge" with "Central Function".
Briefly: unset J9, move J10 to on-board reset (BRD_RST),
and set J15 to make 4-6 instead of 5-6 (see page A-8 also). Plug
the card into its own PCI bus, not the Linux PC used for the flash-programming
process.</P
><P
>Building the Linux software: the Linux software sources are
in directory</P
><TABLE
BORDER="5"
BGCOLOR="#E0E0F0"
WIDTH="70%"
><TR
><TD
><PRE
CLASS="PROGRAMLISTING"
> <BASE_DIR>/packages/hal/arm/ebsa285/v1_3/support/linux/safl_util</PRE
></TD
></TR
></TABLE
><P
>in the eCos source repository. There are two parts to the
system: a loadable kernel module and the flash utility. The loadable
kernel module is safl.o and the utility is sa_flash. To
build:</P
><P
> cd to this directory, or a copy of it.</P
><P
> make</P
><P
>This builds safl.o and sa_flash. The kernel module
must be installed, and a device file created for it. Both of these
operations require root permissions. Create the device file by: </P
><TABLE
BORDER="5"
BGCOLOR="#E0E0F0"
WIDTH="70%"
><TR
><TD
><PRE
CLASS="PROGRAMLISTING"
> % mknod /dev/safl c 10 178</PRE
></TD
></TR
></TABLE
><P
>Programming the flash: switch off the EBSA-285, and remove
the EBSA-285 board from its PCI bus. Take appropriate anti-static
precautions. Configure it for flash loading as above, halt your
Linux system and turn it off. Install the EBSA-285 board in the
PCI bus of the Linux system and boot it up. (Single user is good enough,
assuming your image and safl_util build dir are on a local
disc partition.) Change directory to the safl_util directory,
then, to load the kernel module and flash an image onto the eval
board (as root): </P
><TABLE
BORDER="5"
BGCOLOR="#E0E0F0"
WIDTH="70%"
><TR
><TD
><PRE
CLASS="PROGRAMLISTING"
> % insmod safl.o
% sa_flash <image_file></PRE
></TD
></TR
></TABLE
><P
>Halt and turn off the Linux machine and remove the EBSA-285
card. Take appropriate anti-static precautions. Configure it for
execution of eCos programs as above, and plug it into its own PCI
bus. Restart the Linux machine however you wish.</P
><P
>This information is replicated in the README file within the
safl_util directory and its parents, and in the EBSA-285
Reference Manual from Intel, appendix A "Configuration Guide".
If in doubt, please refer to those documents also.</P
><P
>This procedure also applies for loading ROM-startup eCos programs
into the on-board flash memory, given a binary format image of the
program from arm-elf-objcopy. Loading a ROM-startup eCos program
into flash will overwrite the StubROM in flash, so you would have
to reload the StubROM to return to normal RAM-startup program development.</P
></DIV
><DIV
CLASS="SECT2"
><H2
CLASS="SECT2"
><A
NAME="AEN4038">Running your eCos Program Using GDB and the StubROM</H2
><DIV
CLASS="NOTE"
><BLOCKQUOTE
CLASS="NOTE"
><P
><B
>Note: </B
>You must first load the StubROM image into the flash memory
on the EBSA-285 board before doing this. See “Loading
the ROM Image into On-board Flash”, page 93 for details.</P
></BLOCKQUOTE
></DIV
><P
>Connect to the StubROM in the board and run your eCos program <PROGRAM> as</P
><P
>follows:</P
><TABLE
BORDER="5"
BGCOLOR="#E0E0F0"
WIDTH="70%"
><TR
><TD
><PRE
CLASS="PROGRAMLISTING"
> $ arm-elf-gdb -nw <PROGRAM>
(gdb) set remotebaud 38400
(gdb) target remote <DEVICE></PRE
></TD
></TR
></TABLE
><P
>Where <DEVICE> is /dev/ttyS0
or COM1: or similar, depending on your environment and how you connected
your serial line to the host computer. Expect some output here,
for example:</P
><TABLE
BORDER="5"
BGCOLOR="#E0E0F0"
WIDTH="70%"
><TR
><TD
><PRE
CLASS="PROGRAMLISTING"
> Remote debugging using /dev/ttyS0
0x410026a4 in ?? ()</PRE
></TD
></TR
></TABLE
><P
>then, to load the program</P
><TABLE
BORDER="5"
BGCOLOR="#E0E0F0"
WIDTH="70%"
><TR
><TD
><PRE
CLASS="PROGRAMLISTING"
> (gdb) load
</PRE
></TD
></TR
></TABLE
><P
>which will report locations and sizes of sections as they
load, then begin execution using</P
><TABLE
BORDER="5"
BGCOLOR="#E0E0F0"
WIDTH="70%"
><TR
><TD
><PRE
CLASS="PROGRAMLISTING"
> (gdb) continue</PRE
></TD
></TR
></TABLE
><P
>If you have no eCos program yet, but you want to connect to
the board just to verify serial communications, tell gdb "set endian
little" before anything else, so that it understands the board (GDB
normally infers this from information within the eCos program).</P
><DIV
CLASS="NOTE"
><BLOCKQUOTE
CLASS="NOTE"
><P
><B
>Note: </B
>When an eCos program is run on the EBSA-285 board, the GDB
stub in ROM loses control. This means that if you require the ability
to stop execution on the target remotely, or want thread debugging
capabilities, you must include GDB stub support when configuring
<SPAN
CLASS="PRODUCTNAME"
>eCos</SPAN
>.</P
></BLOCKQUOTE
></DIV
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