[ECOS] IXDP425 vs. IXP420 based board

Gary Thomas gary@mlbassoc.com
Mon Oct 6 13:14:00 GMT 2003


On Sun, 2003-10-05 at 19:58, Sleepy wrote:
> Hi
> I have a board based on the ixdp425 from intel.
> the main differences are that this board uses one uart, supports up to 8MB
> flash, and has a ixp420 cpu.
> I have written redboot to a flash chip, this chip boots and functions
> correctly the IXDP425 development board, but I got flash checksum error or
> invalid key on the target board, the code seems to be going through the
> flash doing a checksum or something, and everyonce in a while it will
> print the same error message, but i never got a redboot prompt.
> are there major differences between the two cpu's?
> any tips on how could I debug this?
> is there any simple boot code that i can burn to the flash to verify basic
> hardware operations are working?

The fact that you get any messages at all says that RedBoot is starting
to work.  The message you got about FLASH checksum error is just a 
warning, telling you that you've not yet initialized your 'fconfig' data
in FLASH.  Once you get to a prompt, use "fc -i" to set this.

As for why you don't get a prompt, that's harder.  I'd try putting some
calls to diag_printf() in .../redboot/current/src/main.c and try and 
follow the initialization and see where it hangs up.

-- 
Gary Thomas <gary@mlbassoc.com>
MLB Associates


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