[ECOS] Loading the rom on an AT91EB40A

[Jay Bennie <jay at lincore dot co dot uk>]

Hi, 

after days of digging, I'm starting to get the hang of eCos and embedded
development in general.

Anyway to describe the setup. 

I have a standard AT91EB40A(Ver 1.0 Rev 0) Eval board from Atmel. 
Flash is a AT49BV1614A

so far - after many wrong turns i have the following 

ecos-2.0 installed to /opt/ecos as installed by the scripts 
cvs is current (21st October 2003) and located in /opt/ecos/cvs/ecos

i have modified /opt/ecos/ecosenv.sh to point to the cvs Package
repository

Then in my home directory i have ecos/ram and ecos/rom  

to build the file redboot.elf  (Ram version)

i run the following commands: 
$ cd ram
$ ecosconfig new eb40a redboot
$ ecosconfig import
/opt/ecos/cvs/ecos/ecos/packages/hal/arm/at91/eb40a/current/misc/redboot_RAM.ecm
$ ecosconfig tree
$ make 

to build the ROM files

$ cd ../rom
$ ecosconfig new eb40a redboot
$ ecosconfig import
/opt/ecos/cvs/ecos/ecos/packages/hal/arm/at91/eb40a/current/misc/redboot_ROM.ecm
$ ecosconfig tree
$ make 

then return to ram/install/bin 
and type 
$ arm-elf-gdb redboot.elf

<now in GDB type> 
tar rdi s=/dev/ttyS0
set $cpsr=0xd3
load
<the file loads>
cont
<escape with ^Z>

< now open minicom >
$ minicom
<the following is the output from this command. >
// ================================ Start of paste ===============

RedBoot> AT S7=45 S0=0 L1 V1 X4 &c1 E1 Q0
** Error: Illegal command: "AT"
RedBoot> version
                                                                                                           
RedBoot(tm) bootstrap and debug environment [RAM]
Non-certified release, version UNKNOWN - built 13:41:16, Oct 21 2003
                                                                                                           
Platform: Atmel AT91/EB40A (ARM7TDMI)
Copyright (C) 2000, 2001, 2002, Red Hat, Inc.
                                                                                                           
RAM: 0x00000000-0x00040000, [0x0001ff88-0x0003f000] available
FLASH: 0x01000000 - 0x01200000, 32 blocks of 0x00010000 bytes each.
RedBoot> load -m ymodem -b %{FREEMEMLO}
CCCCCCCCC...........Can't load '<null>': Timed out
RedBoot>


// ================================ End of paste ===============

I have to say i don't follow what this is doing, i assumed that i would
need to specify the loactaion of the rom file
/home/jbennie/ecos/rom/install/bin/redboot.srec but from the help for
the AT91 this does not appear to be the case. I now assume that the ram
image is dumped from memory into the flash using the next command 

e.g. RedBoot> fi wr -f 0x01100000 -b %{FREEMEMLO} -l 0x010000 

- I also noted that there are differences between my memory map and that
published in the help 

http://sources.redhat.com/ecos/docs-latest/ref/at91.html

Anyway, given that I'm new to all of this any help would be appreciated
and if anyone has any specific advice on the eb40a I'd appreciate a
quick email as i need to compile as much of this information into an
eCos for the eb40a FAQ/mini-HOWTO, it will help the other people i'm
working with get up to speed and hopefully be of some use to the
community as well.

Regards
Jay 

---------------------------------------
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mob:07976 300036
eml:jay@lincore.com | jay@lincore.co.uk
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