Re: [ECOS] Atmel eb55 redboot problem

[Alan Bowman <abowman at synaptics-uk dot com>]

Are you attempting to do this after the pre-loaded Angel bootloader has 
run or not?  If so, there's probably no need to set up the EBI first - 
the instructions in the documentation seemed to work fine for me:

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

If you are performing these instructions from power-up, i.e. before 
Angel manages to run, you will probably need to get the clock working at 
the expected speed before running Redboot - I'm not sure how problematic 
it would be running Redboot at the default rate of the EB55 board, which 
is somewhat less than what Redboot expects.  The following commands 
worked for me when I managed to delete Angel from flash (oops) and 
needed to use the Wiggler to jumpstart Redboot RAM into the board:

word 0xffff4020 = 0x002f0002 ;clock
word 0xffff4020 = 0x002f4002 ;
word 0xffff4020 = 0x032f4102 ;
word 0xffff4020 = 0x032f8102 ;
word 0xffe00000 = 0x01002529 ;EBI
word 0xffe00004 = 0x02002121 ;
word 0xffe00024 = 0x00000006 ;
word 0xffe00020 = 0x00000001 ;remap

Then I could use the Wiggler to download the CVS-provided Redboot RAM image.

Hope this helps

Alan Bowman


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