Re: [ECOS] Redboot vs GDB application download (ARM E7T)

["Ali Sina" <replay688@hotmail.com>]

Hi,

ok, here something else I tried.
This is now getting slightly superstitious but I guess I will do a lot to 
get this to work..

- arm-elf-gdb -nw filename.elf
- load

At the serial port entered "++$k#6b" as suggested by A.Massa (page 202) to 
regain Redboot control.

"go -c 0x00010000" will produce the same effect: application starts, runs 
for 20 sec. or so, and then suddenly stops all by itself, whereas starting 
it with continue is fine.
Any other difference between go and continue?

Or am I missing something really that fundamental? - I really wish..


AS



----------------------------------

    * From: "Ali Sina" <replay688 at hotmail dot com>
    * To: msalter at redhat dot com
    * Cc: gary at mlbassoc dot com, ecos-discuss at ecos dot sourceware dot 
org
    * Date: Sat, 18 Jun 2005 06:46:31 +0000
    * Subject: Re: [ECOS] Redboot vs GDB application download (ARM E7T)
    * Bcc:

Hello,

ok, here is what I did:

-------
RedBoot> cache ON
RedBoot> cache
Data cache: On, Instruction cache: On
RedBoot> load -b 0x00010000 -m xmodem
CCC\x06Entry point: 0x00010040, address range: 0x00010000-0x00037884
xyzModem - CRC mode, 1838(SOH)/0(STX)/0(CAN) packets, 3 retries
RedBoot> go -c 0x00010000
---------


The -c option is to ensure that the caches are on.

I get the same problem, this does not fix it either.
This is crazy


Anything else that could be different from running via GDB? Here is what 
works there:
--
arm-elf-gdb -nw filename.elf -x .arm-elf-gdbinit
--
..with the latter containing:

set remotebaud 38400
target remote /dev/ttyS0
load
continue




Another suggestion was to look after the watchdog timer, but there is
none in the standard E7T which I am using.



AS


>From: Mark Salter <msalter@redhat.com>
>To: Ali Sina <replay688@hotmail.com>
>CC: gary@mlbassoc.com, ecos-discuss@ecos.sourceware.org
>Subject: Re: [ECOS] Redboot vs GDB application download (ARM E7T)
>Date: Fri, 17 Jun 2005 15:34:07 -0400
>
>On Thu, 2005-06-16 at 20:45 +0000, Ali Sina wrote:
> > Hello,
> >
> > is there any difference between loading an application to RAM and 
>running it
> > there via Redboot as opposed to via GDB?
> >
> > On the E7T with a ROM Redboot I observe the following:
> > - loading the app to RAM via GDB and starting it (continue) works fine.
> > Application has not crashed in months.
> > - loading the same code to RAM via Redboot (load -m xmodem) and starting 
>it
> > (go) will start the application but the systems hangs after a few 
>seconds.
> >
> > Anyone a clue as to why this could be happening?
> >
>
>The go command will turn off caches by default. Loading and running with
>gdb won't turn off caches.
>
>--Mark
>
>

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