from gdb on a Mac to BDM on a 68332?

from gdb on a Mac to BDM on a 68332?

[David Knuth]

Hi,

I've built a gcc cross-compiler on Darwin (Mac OS X) and am now looking 
for a way to do cross-debugging from gdb to a 68332 target via BDM.  
There are a number of hurdles here.

1) Has anyone done this from Mac OS X?
2) How do I configure gdb to use a USB port (late Mac's have only USB 
and FireWire ports)?
3) Will I likely have to develop my own USB drivers (IOKit?)?
4) Do I have to build a custom USB <-> BDM device?  Are there any 
commercial ones available?
5) Should I instead use a USB <-> RS232 converter and then something 
from RS-232 <-> BDM?  What?

I suspect there will be a long road ahead before my goal is realized.  
Thanks for any input to get me going.

David

========================================================
David Knuth     dknuth@intellibot.cc     (804) 543-2703

Re: from gdb on a Mac to BDM on a 68332?

[Joel Sherrill]

David Knuth wrote:
> 
> Hi,
> 
> I've built a gcc cross-compiler on Darwin (Mac OS X) and am now looking
> for a way to do cross-debugging from gdb to a 68332 target via BDM.
> There are a number of hurdles here.
> 
> 1) Has anyone done this from Mac OS X?
> 2) How do I configure gdb to use a USB port (late Mac's have only USB
> and FireWire ports)?
> 3) Will I likely have to develop my own USB drivers (IOKit?)?
> 4) Do I have to build a custom USB <-> BDM device?  Are there any
> commercial ones available?
> 5) Should I instead use a USB <-> RS232 converter and then something
> from RS-232 <-> BDM?  What?

There is this which might work for you:

http://www.bdmtools.com/bdm-usb.htm

But they don't list Mac support.

Just off the top of my head, I would have tought that a parallel port 
BDM combined with a USB parallel port adapter would come close to
doing the trick.  Then I read this URL

http://www.ramelectronics.net/html/usb_printer_cable.htm

which states "USB to parallel port converters are for
printers only! All-in-one units (printer/fax/scanner) or scanners, zip
drives, etc. will not work with any USB to parallel port converter
currently 
available."

Hopefully that's a marketing claim but my VERY quick search didn't come
up with
UCB to parallel adapter that claimed support for anything except
printers.

If you solved that minor <sarcastic grin> problem, you should be able to
trick any parallel port device into working.

> I suspect there will be a long road ahead before my goal is realized.
> Thanks for any input to get me going.
> 
> David
> 
> ========================================================
> David Knuth     dknuth@intellibot.cc     (804) 543-2703
> 
> ------
> Want more information?  See the CrossGCC FAQ, http://www.objsw.com/CrossGCC/
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-- 
Joel Sherrill, Ph.D.             Director of Research & Development
joel@OARcorp.com                 On-Line Applications Research
Ask me about RTEMS: a free RTOS  Huntsville AL 35805
Support Available                (256) 722-9985

Re: from gdb on a Mac to BDM on a 68332?

[William A. Gatliff]

David:


On Tue, Sep 17, 2002 at 03:14:12PM -0400, David Knuth wrote:
> Hi,
> 
> I've built a gcc cross-compiler on Darwin (Mac OS X) and am now looking 
> for a way to do cross-debugging from gdb to a 68332 target via BDM.  
> There are a number of hurdles here.
> 
> 1) Has anyone done this from Mac OS X?
> 2) How do I configure gdb to use a USB port (late Mac's have only USB 
> and FireWire ports)?
> 3) Will I likely have to develop my own USB drivers (IOKit?)?
> 4) Do I have to build a custom USB <-> BDM device?  Are there any 
> commercial ones available?
> 5) Should I instead use a USB <-> RS232 converter and then something 
> from RS-232 <-> BDM?  What?
>
> I suspect there will be a long road ahead before my goal is realized.  
> Thanks for any input to get me going.

I use an Abatron BDIgdb.  It's an ethernet-to-BDM (or
ethernet-to-JTAG, depending on which one you get) adapter that speaks
gdb's native remote serial protocol.  It's easy to set up, just plug
it into your ethernet, twiddle a few configuration settings to tell it
about your CPU32 bus speed and so forth, then start talking to it with
gdb's "target remote" command.  It uses a vanilla gdb, not a patched
one.

I've abused the CPU32 version pretty hard, and it's always come back
for more.  It's pretty robust.  It even has a hook to tie into the RSP
console out ("O") command.

It's a bit pricey, at about $2k USD, but you don't have to burn up
much time trying to get something else to work before it's a much more
cost-effective and productive solution.

No, I don't work for Abatron.  I just like their stuff.  :^)


b.g.
-- 
Real embedded GNU and embedded Linux training is available.
See http://billgatliff.com for details.