[ECOS] Configuring serial ports for Redboot and GDB

[ECOS] Configuring serial ports for Redboot and GDB

[Miguel J. Vega]

Hi Gary and list,

I have built redboot with CYGPKG_REDBOOT_ANY_CONSOLE disabled, debugging
serial port set to channel 0 (serial port 1 on board), diagnostic serial
port set to channel 1 (serial port 2 on board). I disabled
CYGPKG_REDBOOT_ANY_CONSOLE to simplify things and spare myself some
confusion.

When I start up, redboot's output (redboot start-up banner, commands,
etc.) comes from the debug port, which I assume is correct. I also use
this port to communicate with the GDB-console (load, continue, inserting
breakpoints, etc.). The only thing that I was not expecting was for the
printf() functions (when I am running programs from GDB) to output through
the diagnostic port. This output appears on a hyperterminal window that
I have open on another PC, since I only have one com port available on
each PC.

I would like for the printf() output to go to the GDB-console,
but the GDB-console currently communicates to the board via the debugging
port. Any ideas on how I can make it happen?

By the way I am building eCos programs with a default eCos build and the
option "work with a ROM monitor" is checked.


Thanks,

Miguel J. Vega
FEGI C&DH Team
University of Michigan

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Re: [ECOS] Configuring serial ports for Redboot and GDB

[Gary Thomas]

On Tue, 2004-07-06 at 20:00, Miguel J. Vega wrote:
> Hi Gary and list,
> 
> I have built redboot with CYGPKG_REDBOOT_ANY_CONSOLE disabled, debugging
> serial port set to channel 0 (serial port 1 on board), diagnostic serial
> port set to channel 1 (serial port 2 on board). I disabled
> CYGPKG_REDBOOT_ANY_CONSOLE to simplify things and spare myself some
> confusion.
> 
> When I start up, redboot's output (redboot start-up banner, commands,
> etc.) comes from the debug port, which I assume is correct. I also use
> this port to communicate with the GDB-console (load, continue, inserting
> breakpoints, etc.). The only thing that I was not expecting was for the
> printf() functions (when I am running programs from GDB) to output through
> the diagnostic port. This output appears on a hyperterminal window that
> I have open on another PC, since I only have one com port available on
> each PC.
> 
> I would like for the printf() output to go to the GDB-console,
> but the GDB-console currently communicates to the board via the debugging
> port. Any ideas on how I can make it happen?

This is how it is supposed to work - all "console" output through GDB
goes via the debug channel.

If you want to have a debug channel (used by GDB and diag_printf()), and
separate other channel for printf() to use (of course, this would 
require two serial connections), then you'll need to do some 
configuring.  

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


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[ECOS] redboot help

[Sam Pham]

Hi all,

I ran my application from RAM of the rattler board
with gdb as the debugger.  Gdb on the host computer
connected to the rattler board through 1 of its 2
ethernet ports.  After approximately less than 1 hour,
the host gdb received the message:

"FLASH configuration checksum error or invalid key"

and the program asserted and stopped right after that.
 I looked up this string message and found out that it
came from function flash_get_config() in file
redboot/current/src/fconfig.c.  My application doesn't
do anything with flash.  I don't have a way to trace
back to see what function calls function 
flash_get_config() to determine the cause of this
error because gdb doesn't have fconfig.c in its list
of source file.  And I couldn't use backtrace feature
in gdb for this particular case neither.

So anyone knows what its possible causes are?  Why
would redboot try to get the flash config anyway?

Thanks.

Sam



		
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