From: Gary Thomas <gthomas@redhat.com>
To: "amassa@cts.com" <amassa@cts.com>
Cc: eCos Discussion <ecos-discuss@sourceware.cygnus.com>
Subject: RE: [ECOS] Re: MBX Board
Date: Tue, 30 May 2000 16:38:00 -0000 [thread overview]
Message-ID: <XFMail.000530173822.gthomas@redhat.com> (raw)
In-Reply-To: <200005302219.PAA71424@batman.cts.com>
On 30-May-00 amassa@cts.com wrote:
> Gary Thomas <gthomas@redhat.com> writes:
>>On 30-May-00 amassa@cts.com wrote:
>>> But then there is no way to get the EPPC-bug firmware back into the
> Flash,
>>> right? Or can it be copied from the socketed boot ROM?
>>>
>>
>>My board came with EPPCbug in both of them. Simply changing the jumper
> allows
>>me to execute from one or the other. Thus you can program the eCos GDB
> stubs
>>into the flash and still have EPPCbug available.
>
> I understand, but it would be nice to have a way back to the original
> configuration.
>
Just move the jumper back.
>>
>>> Did you just convert D:\Program Files\Red
>>> Hat\eCos\loaders\powerpc-mbx\gdb_module.bin into an srec format (using
>>> objcopy) and then download that? If so, what switches did you use on
>>> objcopy.
>>>
>>
>>It was as simple as
>> powerpc-eabi-objcopy -O binary gdb_module.bin gdb_module.hex
>
Sorry, I meant 'srec' instead of 'binary'. The extension doesn't matter.
> I thought that EPPC-Bug expects the downloaded file to be in srec format
> (with .mx extension). Doesn't this produce a binary file?
>
> This brings up another question for me. Should the powerpc-eabi-xxx tools
> be used for everything? Or can cygwin\bin\xxxx tools be used?
>
For everything to do with the target, yes.
>>
>>> I know it might not make much sense but can I download the
> gdb_module.bin
>>> file into DRAM and execute it there and have it take control of the
> board,
>>> giving me GDB support?
>>>
>>
>>Not really. That module is only "comfortable" running from ROM/flash.
>>
>>> Can I just follow the instructions in the file
>>> D:\Program Files\Red
>>> Hat\eCos\packages\hal\powerpc\mbx\v1_3_1\src\Notes_GDB_stub?
>>>
>>
>>You'd just end up recreating the 'gdb_module.bin' file above.
>>
>>> I'm a little confused with the EPPC-bug commands detailed in the
>>> Notes_GDB_stub file. LO 0, downloads the code into DRAM? And then what
>>> does the PFLASH 40000 60000 fc000000 instruction do?
>>>
>>
>>Actually programs the flash chip with the contents of memory, starting
>>at location 0x40000.
>>
>
> Contents of the DRAM memory? So this programs the flash at address
> fc000000? Is 40000 the location of the file in DRAM? What is 60000? Sorry
> for the basic questions.
>
Yes, from DRAM. 60000 is the end of the image.
> Thanks,
> Anthony
>
>
>>>
>>> Gary Thomas <gthomas@redhat.com> writes:
>>>>The MBX boards we have actually have two separate flash chips. Based on
>>> the
>>>>use of jumper J4 you can select between the two. My board has EPPC-bug
> in
>>> one
>>>>flash chip and eCos GDB stubs in the other.
>>>>
>>>>On 30-May-00 Jonathan Larmour wrote:
>>>>> "amassa@cts.com" wrote:
>>>>>>
>>>>>> I am using the MBX860 board for development. This board has the
>>> EPPC-bug
>>>>>> firmware programmed into flash.
>>>>>>
>>>>>> What I want to do is to be able to download my own programs -
> initially
>>> just
>>>>>> a basic program. I would like to have GDB support present as well.
>>>>>>
>>>>>> I don't know if I need to compile a gdb stub and download that first
>>> into
>>>>>> RAM and then use that to connect insight and download my application
>>> code.
>>>>>>
>>>>>> I would like to leave the EPPC-bug firmware as is in ROM, and not
>>> program
>>>>>> over it.
>>>>>
>>>>> You should include the GDB support in the application you download, in
>>> the
>>>>> form of GDB stubs.
>>>>>
>>>>> To do this, go to the "eCos HAL" package and under "Source-level
>>> debugging
>>>>> support" there is the "Include GDB stubs in HAL" option (aka
>>>>> CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS), which you should enable. If you
>>> want
>>>>> Ctrl-C to work with stubs enabled, you should also enable GDB break
>>> support
>>>>> for stubs (CYGDBG_HAL_DEBUG_GDB_BREAK_SUPPORT).
>>>>>
>>>>> Jesper may have some more input.
>>>>>
>>>>> Jifl
>>>>> --
>>>>> Red Hat, 35 Cambridge Place, Cambridge, UK. CB2 1NS Tel: +44 (1223)
>>> 728762
>>>>> "Plan to be spontaneous tomorrow." || These opinions are all my own
>>> fault
>>>>>
>>>
>
next parent reply other threads:[~2000-05-30 16:38 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <200005302219.PAA71424@batman.cts.com>
2000-05-30 16:38 ` Gary Thomas [this message]
[not found] <200006071617.JAA24571@batman.cts.com>
2000-06-08 0:41 ` [ECOS] " Jesper Skov
[not found] <200006061724.KAA77998@batman.cts.com>
2000-06-06 23:51 ` Jesper Skov
[not found] <200005302201.PAA70440@batman.cts.com>
2000-05-30 15:10 ` [ECOS] " Gary Thomas
[not found] <200005302113.OAA67770@batman.cts.com>
2000-05-30 14:25 ` Jonathan Larmour
2000-05-30 14:29 ` Gary Thomas
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