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>ARM/ARM7 Atmel AT91 Evaluation Board (EB40)</TITLE
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><H1
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><A
NAME="AT91">ARM/ARM7 Atmel AT91 Evaluation Board (EB40)</H1
><DIV
CLASS="SECT2"
><H2
CLASS="SECT2"
><A
NAME="AEN5256">Overview</H2
><P
>RedBoot supports both serial ports.
The default serial port settings are 38400,8,N,1. RedBoot
also supports minimal flash management on the EB40.
However, since the flash device (AT29LV1024) is so small (only the upper 64K is
available for general use), only the simple flash write command 'fis
write' is supported.</P
><P
>The following RedBoot configurations are supported:
<DIV
CLASS="INFORMALTABLE"
><A
NAME="AEN5266"><P
></P
><TABLE
BORDER="1"
CLASS="CALSTABLE"
><THEAD
><TR
><TH
ALIGN="LEFT"
VALIGN="TOP"
>Configuration</TH
><TH
ALIGN="LEFT"
VALIGN="TOP"
>Mode</TH
><TH
ALIGN="LEFT"
VALIGN="TOP"
>Description</TH
><TH
ALIGN="LEFT"
VALIGN="TOP"
>File</TH
></TR
></THEAD
><TBODY
><TR
><TD
ALIGN="LEFT"
VALIGN="TOP"
>ROM</TD
><TD
ALIGN="LEFT"
VALIGN="TOP"
>[ROM]</TD
><TD
ALIGN="LEFT"
VALIGN="TOP"
>RedBoot running from the board's flash boot
sector.</TD
><TD
ALIGN="LEFT"
VALIGN="TOP"
>redboot_ROM.ecm</TD
></TR
><TR
><TD
ALIGN="LEFT"
VALIGN="TOP"
>RAM</TD
><TD
ALIGN="LEFT"
VALIGN="TOP"
>[RAM]</TD
><TD
ALIGN="LEFT"
VALIGN="TOP"
>RedBoot running from RAM with RedBoot in the
flash boot sector.</TD
><TD
ALIGN="LEFT"
VALIGN="TOP"
>redboot_RAM.ecm</TD
></TR
><TR
><TD
ALIGN="LEFT"
VALIGN="TOP"
>ROMRAM</TD
><TD
ALIGN="LEFT"
VALIGN="TOP"
>[ROMRAM]</TD
><TD
ALIGN="LEFT"
VALIGN="TOP"
>RedBoot running from RAM, but contained in the
board's flash boot sector.</TD
><TD
ALIGN="LEFT"
VALIGN="TOP"
>redboot_ROMRAM.ecm</TD
></TR
></TBODY
></TABLE
><P
></P
></DIV
></P
></DIV
><DIV
CLASS="SECT2"
><H2
CLASS="SECT2"
><A
NAME="AEN5290">Initial Installation Method</H2
><P
>This development board comes with ARM's debug tool, Angel, installed in flash.
At this time, Angel will not be replaced. Rather, RedBoot will be placed in
the alternate half of flash. Switch SW1 is used which monitor to boot. Selecting
SW1 to "lower mem" will choose Angel. Select SW1 to "Upper mem" for RedBoot once
it has been installed.</P
><P
>Set SW1 to "lower mem" and connect serial port A to a host computer. Using GDB
from the host and Angel on the board, download the RAM mode image of RedBoot
to the board. SW1 should then be set to "upper mem" just before starting RedBoot using
the 'cont' command. Once RedBoot is started, the Angel session must be interrupted (on
Linux this can be done using ^Z). Follow this by connecting to the board using
minicom at 38400-8N1. At this point, RedBoot will be running on the board in
RAM. Now, download the ROMRAM mode image and program it to flash.
<TABLE
BORDER="5"
BGCOLOR="#E0E0F0"
WIDTH="70%"
><TR
><TD
><PRE
CLASS="SCREEN"
><TT
CLASS="USERINPUT"
><B
>arm-elf-gdb redboot_RAM.elf</B
></TT
>
(gdb) <TT
CLASS="USERINPUT"
><B
>tar rdi s=/dev/ttyS0</B
></TT
>
Angel Debug Monitor (serial) 1.04 (Advanced RISC Machines SDT 2.5) for
AT91EB40 (2.00)
Angel Debug Monitor rebuilt on Apr 07 2000 at 12:40:31
Serial Rate: 9600
Connected to ARM RDI target.
(gdb) <TT
CLASS="USERINPUT"
><B
>set $cpsr=0xd3</B
></TT
>
(gdb) <TT
CLASS="USERINPUT"
><B
>load</B
></TT
>
Loading section .rom_vectors, size 0x40 lma 0x2020000
Loading section .text, size 0x7fd8 lma 0x2020040
Loading section .rodata, size 0x15a0 lma 0x2028018
Loading section .data, size 0x2e4 lma 0x20295b8
Start address 0x2020040 , load size 39068
Transfer rate: 6250 bits/sec, 500 bytes/write.</PRE
></TD
></TR
></TABLE
>
At this point, set SW1 to "upper mem".
<TABLE
BORDER="5"
BGCOLOR="#E0E0F0"
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><TR
><TD
><PRE
CLASS="SCREEN"
>(gdb) <TT
CLASS="USERINPUT"
><B
>cont</B
></TT
>
Continuing.</PRE
></TD
></TR
></TABLE
>
At this point, suspend the GDB session (use Ctrl-Z) and start a
terminal emulator:
<TABLE
BORDER="5"
BGCOLOR="#E0E0F0"
WIDTH="70%"
><TR
><TD
><PRE
CLASS="SCREEN"
>RedBoot> <TT
CLASS="USERINPUT"
><B
>version</B
></TT
>
RedBoot(tm) bootstrap and debug environment [RAM]
Non-certified release, version UNKNOWN - built 14:09:27, Jul 20 2001
Platform: Atmel AT91/EB40 (ARM7TDMI)
Copyright (C) 2000, 2001, Red Hat, Inc.
RAM: 0x02000000-0x02080000, 0x020116d8-0x0207fd00 available
FLASH: 0x01010000 - 0x01020000, 256 blocks of 0x00000100 bytes each.
RedBoot> <TT
CLASS="USERINPUT"
><B
>load -m ymodem -b %{FREEMEMLO}</B
></TT
></PRE
></TD
></TR
></TABLE
>
Use minicom to send the file redboot_ROMRAM.srec via YModem.
<TABLE
BORDER="5"
BGCOLOR="#E0E0F0"
WIDTH="70%"
><TR
><TD
><PRE
CLASS="SCREEN"
>RedBoot> <TT
CLASS="USERINPUT"
><B
>fi wr -f 0x01010000 -b %{FREEMEMLO} -l 0xe100</B
></TT
></PRE
></TD
></TR
></TABLE
>
Press the "reset" pushbutton and RedBoot
should come up on the board.</P
></DIV
><DIV
CLASS="SECT2"
><H2
CLASS="SECT2"
><A
NAME="AEN5306">Special RedBoot Commands</H2
><P
>None.</P
></DIV
><DIV
CLASS="SECT2"
><H2
CLASS="SECT2"
><A
NAME="AEN5309">Memory Maps</H2
><P
>This processor has no MMU, so the only memory map is for physical addresses.
<TABLE
BORDER="5"
BGCOLOR="#E0E0F0"
WIDTH="70%"
><TR
><TD
><PRE
CLASS="PROGRAMLISTING"
>Physical Address Range Description
----------------------- ----------------------------------
0x00000000 - 0x00000fff On-chip SRAM
0x01000000 - 0x0101ffff Flash
0x02000000 - 0x0207ffff RAM
0xffe00000 - 0xffffffff I/O registers
The flash based RedBoot image occupies virtual addresses 0x01010000 - 0x0101dfff</PRE
></TD
></TR
></TABLE
></P
></DIV
><DIV
CLASS="SECT2"
><H2
CLASS="SECT2"
><A
NAME="AEN5313">Rebuilding RedBoot</H2
><P
>These shell variables provide the platform-specific information
needed for building RedBoot according to the procedure described in
<A
HREF="rebuilding-redboot.html"
>Chapter 3</A
>:
<TABLE
BORDER="5"
BGCOLOR="#E0E0F0"
WIDTH="70%"
><TR
><TD
><PRE
CLASS="PROGRAMLISTING"
>export TARGET=eb40
export ARCH_DIR=arm
export PLATFORM_DIR=at91</PRE
></TD
></TR
></TABLE
></P
><P
>The names of configuration files are listed above with the
description of the associated modes.</P
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