[ECOS] RedBoot porting problem
Gary Thomas
gthomas@cambridge.redhat.com
Wed Jun 13 13:14:00 GMT 2001
On 13-Jun-2001 Jeremy Lin wrote:
> Hi,
> I use CVS version of eCos for my target.
> Now I have a working HAL and serial driver for
> my platform(SAMSUNG KS32C50100 based), and
> the gdb stub works fine on my board.
> I was trying to port redboot to my platform. I
> tried to compile it by choosing template "redboot"
> and it compiled successfully; I also have a set of
> ecm files which is copied from pid platform.
> But when I load the redboot image file and run it,
> instead of redboot banner, the serial port always
> outputs a string like this "$T0a0f:00000000;0d:00000000;#f9",
> just like what I got when using gdb stub.
> Does that mean it still in gdb protocol mode? How can I get
> the redboot mode? Please give me a hint..
It means that something went wrong when you started it up. Are
you running this from ROM or RAM?
You can get a clue by simply connecting to your board via GDB
and getting a backtrace and register info. This may give you
an idea why it is failing.
% arm-elf-gdb -nw redboot.elf
(gdb) set remotebaud 38400
(gdb) tar rem /dev/ttyS0
(gdb) info reg
(gdb) bt
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