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>ARM/StrongARM(SA11X0) Bright Star Engineering commEngine and nanoEngine</TITLE
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><H1
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><A
NAME="NANO">ARM/StrongARM(SA11X0) Bright Star Engineering commEngine and nanoEngine</H1
><DIV
CLASS="SECT2"
><H2
CLASS="SECT2"
><A
NAME="AEN5801">Overview</H2
><P
>RedBoot supports a serial port and the built in ethernet port
for communication and downloads. The default serial port settings are 38400,8,N,1.
RedBoot runs from and supports flash management for the system flash
region.</P
><P
>The following RedBoot configurations are supported:
<DIV
CLASS="INFORMALTABLE"
><A
NAME="AEN5817"><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"
>POST</TD
><TD
ALIGN="LEFT"
VALIGN="TOP"
>[ROM]</TD
><TD
ALIGN="LEFT"
VALIGN="TOP"
>RedBoot running from the first free flash block
at 0x40000.</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
></TBODY
></TABLE
><P
></P
></DIV
></P
></DIV
><DIV
CLASS="SECT2"
><H2
CLASS="SECT2"
><A
NAME="AEN5836">Initial Installation</H2
><P
>Unlike other targets, the nanoEngine comes equipped with boot firmware
which you cannot modify. See chapter 5, "nanoEngine Firmware" of the <I
CLASS="CITETITLE"
>nanoEngine Hardware Reference Manual</I
> (we refer to "July 17, 2000
Rev 0.6") from Bright Star Engineering. </P
><P
>Because of this, eCos, and therefore Redboot, only supports a
special configuration of the ROM mode, starting at offset 0x40000 in
the flash.</P
><P
>Briefly, the POST-configuration RedBoot image lives in flash following the
BSE firmware. The BSE firmware is configured, using its standard <B
CLASS="COMMAND"
>bootcmd</B
> command, to run RedBoot at startup.</P
></DIV
><DIV
CLASS="SECT2"
><H2
CLASS="SECT2"
><A
NAME="AEN5843">Download Instructions</H2
><P
>You can perform the initial load of the POST-configuration RedBoot image into
flash using the BSE firmware's <B
CLASS="COMMAND"
>load</B
> command.
This will load a binary file, using TFTP, and program it into flash in one
operation. Because no memory management is used in the BSE firmware, flash
is mapped from address zero upwards, so the address for the RedBoot POST image
is 0x40000. You must use the binary version of RedBoot for this,
<TT
CLASS="FILENAME"
>redboot-post.bin</TT
>.</P
><P
>This assumes you have set up the other BSE firmware config
parameters such that it can communicate over your network to your TFTP
server.
<TABLE
BORDER="5"
BGCOLOR="#E0E0F0"
WIDTH="70%"
><TR
><TD
><PRE
CLASS="SCREEN"
>><TT
CLASS="USERINPUT"
><B
>load redboot-post.bin 40000</B
></TT
>
loading ... erasing blk at 00040000
erasing blk at 00050000
94168 bytes loaded cksum 00008579
done
>
> <TT
CLASS="USERINPUT"
><B
>set bootcmd "go 40000"</B
></TT
>
> <TT
CLASS="USERINPUT"
><B
>get</B
></TT
>
myip = 10.16.19.198
netmask = 255.255.255.0
eth = 0
gateway = 10.16.19.66
serverip = 10.16.19.66
bootcmd = go 40000
></PRE
></TD
></TR
></TABLE
>
<DIV
CLASS="NOTE"
><BLOCKQUOTE
CLASS="NOTE"
><P
><B
>NOTE: </B
>the BSE firmware runs its serial IO at 9600 Baud; RedBoot runs instead
at 38400 Baud. You must select the right baud rate in your terminal program
to be able to set up the BSE firmware.</P
></BLOCKQUOTE
></DIV
>
After a reset, the BSE firmware will print
<TABLE
BORDER="5"
BGCOLOR="#E0E0F0"
WIDTH="70%"
><TR
><TD
><PRE
CLASS="SCREEN"
>Boot: BSE 2000 Sep 12 2000 14:00:30
autoboot: "go 40000" [hit ESC to abort]</PRE
></TD
></TR
></TABLE
>
and then RedBoot starts, switching to 38400 Baud.</P
><P
>Once you have installed a bootable RedBoot in the system in this
manner, we advise re-installing using the generic method described in
<A
HREF="updating-redboot.html"
>Chapter 4</A
> in order that the Flash Image System
contains an appropriate description of the flash entries.</P
></DIV
><DIV
CLASS="SECT2"
><H2
CLASS="SECT2"
><A
NAME="AEN5859">Cohabiting with POST in Flash</H2
><P
>The configuration file named <TT
CLASS="FILENAME"
>redboot_POST.ecm</TT
>
configures RedBoot to build for execution at address 0x50040000 (or, during
bootup, 0x00040000). This is to allow power-on self-test (POST) code or immutable
firmware to live in the lower addresses of the flash and to run before RedBoot
gets control. The assumption is that RedBoot will be entered at its base address
in physical memory, that is 0x00040000.</P
><P
>Alternatively, for testing, you can call it in an already running system
by using <TT
CLASS="USERINPUT"
><B
>go 0x50040040</B
></TT
> at another RedBoot prompt, or
a branch to that address. The address is where the reset vector
points. It is reported by RedBoot's <B
CLASS="COMMAND"
>load</B
> command
and listed
by the <B
CLASS="COMMAND"
>fis list</B
> command, amongst other
places.</P
><P
>Using the POST configuration enables a normal config option which causes
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