--- In lpc2000@lpc2..., Tom Walsh <tom@...> wrote:
>
> boje_d wrote:
>
> >Hi!
> >Is it possible to do debugging via one of the rs232 port?? i would
> >like to use GDB to evaluate variables and make breakpoints on
running
> >HW.
> >
> >
> Well, it is called "gdbserver" and requires running code to work.
You
> might be able to put gdbserver into Flash and have
it download your
> program-under-test into SRAM? gdbserver would need you to write
some
> small code to use the serial port on the Target
system. The
current gdb
> would have the driver needed.
>
> IIRC, gdbserver is most effective on the X86 CPUs as they have
internal
> debug registers (breakpoint) accessible from
software. You cannot
use it
> like a jtag unit where it will debug programs in
flash or to
program
> flash.
>
> I don't know much more about it, try searching the archives of
uClinux.
> It was used on some of the processors without MMUs
or JTAG like the
> Motorola ColdFire / 68EZ328.
>
> TomW
>
> --
> Tom Walsh - WN3L - Embedded Systems Consultant
> http://openhardware.net,http://cyberiansoftware.com
> "Windows? No thanks, I have work to do..."
> ----------------
>
Ill look into it. Thanks a lot
Boje Demant
--- In lpc2000@lpc2..., "Anton Erasmus" <antone@...> wrote:
>
> On 2 Feb 2006 at 14:58, boje_d wrote:
>
> > Hi!
> > Is it possible to do debugging via one of the rs232 port?? i would
> > like to use GDB to evaluate variables and make breakpoints on running
> > HW.
>
> Yes, you need to load a GDB stub for the device. Source is available
for an
> ARM stub, but unless someone else has done it, you
need to write a
tx character
> and rx character routine. The normal stub will
support setting of
breakpoints in RAM.
> Debugging directly from flash is a bit more
involved.
This is harder than it sounds if you want breakpoints - even from RAM.
I'd probably try to get the Angel monitor working on the Arm chip,
then try to make gdb work with that.
But Angel isn't officially supported on modern chips (the last source
I have is from 2002), and I don't know how hard it might be to make it
work. No matter how hard, it's likely going to be easier than doing it
all yourself.
Of course, buying a cheap wiggler clone from Olimex is a good way to
make gdb work with a JTAG interface.
Eric
Reply by Tom Walsh●February 2, 20062006-02-02
boje_d wrote:
>Hi!
>Is it possible to do debugging via one of the rs232 port?? i would
>like to use GDB to evaluate variables and make breakpoints on running
>HW.
>
>
Well, it is called "gdbserver" and requires running code to
work. You
might be able to put gdbserver into Flash and have it download your
program-under-test into SRAM? gdbserver would need you to write some
small code to use the serial port on the Target system. The current gdb
would have the driver needed.
IIRC, gdbserver is most effective on the X86 CPUs as they have internal
debug registers (breakpoint) accessible from software. You cannot use it
like a jtag unit where it will debug programs in flash or to program
flash.
I don't know much more about it, try searching the archives of uClinux.
It was used on some of the processors without MMUs or JTAG like the
Motorola ColdFire / 68EZ328.
TomW
--
Tom Walsh - WN3L - Embedded Systems Consultant
http://openhardware.net,http://cyberiansoftware.com
"Windows? No thanks, I have work to do..."
----------------
Reply by Anton Erasmus●February 2, 20062006-02-02
On 2 Feb 2006 at 14:58, boje_d wrote:
> Hi!
> Is it possible to do debugging via one of the rs232 port?? i would
> like to use GDB to evaluate variables and make breakpoints on running
> HW.
Yes, you need to load a GDB stub for the device. Source is available for an
ARM stub, but unless someone else has done it, you need to write a tx character
and rx character routine. The normal stub will support setting of breakpoints in
RAM.
Debugging directly from flash is a bit more involved.
Regards
Anton Erasmus--
A J Erasmus
Reply by boje_d●February 2, 20062006-02-02
Hi!
Is it possible to do debugging via one of the rs232 port?? i would
like to use GDB to evaluate variables and make breakpoints on running
HW.
Best regards
Boje Demant