RE: [ECOS] eCos on iPaq

[Gary Thomas <gthomas at cambridge dot redhat dot com>]

On 02-Jun-2001 Cristiano Ligieri Pereira wrote:
> 
> Hi everybody,
> 
> I've been struggling to make the simple Hello World application to execute
> on the iPaq but unfortunatelly without success.
> 
> First I'm compiling the application and generation the binary file "hello"
> 
> Then I'm executing RedBoot using the Win/CE OSLoader. The input/output of
> RedBoot goes to my /dev/cua0 since the serial cradle is connect to COM1.
>>From this point on I've tried some variations from which I'm describing
> the one I think is more correct.
> 
>>From Redboot prompt I simply type '$' and as far as I understood the GDB
> stubs take over and I'm supposed to connect to the ipaq using gdb. ThenFor
> this I'm issuing 'arm-elf-gbd -nw hello'. After typing 'set remotebaud
> 38400' and 'target remote /dev/cua0' I'm issuing the command 'load'. Here
> are the messages I'm getting:
> 
> [my machine prompt]# arm-elf-gdb -nw hello
> GNU gdb 5.0
> Copyright 2000 Free Software Foundation, Inc.
> GDB is free software, covered by the GNU General Public License, and you
> are
> welcome to change it and/or distribute copies of it under certain
> conditions.
> Type "show copying" to see the conditions.
> There is absolutely no warranty for GDB.  Type "show warranty" for
> details.
> This GDB was configured as "--host=i686-pc-linux-gnu --target=arm-elf"...
> (gdb) target remote /dev/cua0
> Remote debugging using /dev/cua0
> 0x27628 in ?? ()
> (gdb) set remotebaud 38400
> (gdb) load
> Start address 0x8000 , load size 0
                ^^^^^^

How did you get this address?  How did you build the application?

If you're running with the WinCE version of RedBoot, this address will
have to be something like 0x60000.  As-is, the very first data that
gets loaded will trash the MMU tables used by RedBoot and it will crash.

> Transfer rate: 0 bits in <1 sec.
> (gdb) 
> 
> As you can see the file in not being downloaded. I honestly have no idea
> why? Can someone please explain me how to execute an application other
> than the 'demos' provided in the webpage.
> 
> thanks a lot in advance,
> Cristiano.
> 
> ------------------------------------------------------------
> Cristiano Ligieri Pereira - http://www.ics.uci.edu/~cpereira