[ECOS] Axiom CME-555: RedBoot ROM crashing

[Eric Castle]

Hi again Bob, everyone on the list,

We have an Axiom CME-555 board and are attempting to load RedBoot into
internal flash.  We built this using the 2.0 version of eCos using the
configtool by:
1) Selecting Axiom CME-555 and RedBoot from the templates menu
2) Importing the redboot_ROM.ecm file.
3) Selecting the "RESET vector jumps to startup" option (this actually gets
it so that execution goes to the start of the program).

We download the produced .elf file using the flash programmer in Metrowerks
CodeWarrior and a wiggler.  The jumper settings are M-select off, Ram-select
1, and Flash-select 2.  We set the config switch so that 2, 4, 5, and 6 are
on (5 and 6 allow writes to internal flash, 2 and 4 are standard).  This
allows us to successfully download RedBoot to internal flash.

We then reset the board, setting the config switch so that only 2 and 4 are
on, and setting mode switch 2, switch 1 on, so that internal flash is
enabled.  After opening a hyperterminal window (running at settings that are
at least compatible with a RAM version of RedBoot), we don't get any output.

Examining the code, it seems to fail somewhere within RedBoot.  We noticed a
few pieces of suspicious behavior (using OCD Commander to try stepping
through execution):

1) It did not seem to recognize floating point instructions (maybe this is
just a failing of OCD Commander?)

2) It hung on a "RFI" instruction.


Does anyone have any idea if how we configured RedBoot incorrectly, or what
is going wrong in our version of RedBoot?  Any ideas or assistance would be
greatly appreciated.

Thanks,

-Eric Castle and Miguel Vega
FEGI
University of Michigan



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