rtems gdb/insight to jtag

[Smith, Gene]

-boggy wrote, On 8/31/2004 3:32 PM:

> Hello Gene,
> 
> We use:
> 
> 1. debug-cable and gdb with patch included (possibly) somewhere in the 
> RTEMS "contrib" space for Motorola's MC68360 (or some of Pavel Pisa's 
> patches, I don't remember... but I'will try to find what we use if you 
> need this processor...)
> please find link for MC68360SCH1 in this page,
> http://www.mot-sps.com/webapp/sps/site/prod_summary.jsp?code=MC68360&nodeId=01DFTQGL2n
> if you need schematic...
> 
> 2. debug-cable and gdb with bdm4gdb patch for
> Motorola's MPC860 (http://www.vas-gmbh.de/software/mpcbdm/ < patch and 
> cable schematic is included in tar.gz)
> 
> This cables cost about 50EUR, but that interfaces
> are very simple (about two HC chips + possibly some diodes and
> transistors... we built all of this in our labs... nothing special
> we have one cable per software or hardware engineer, and this is good...)

Looking at the "cable" schematic it appears to drive a standard JTAG 
port as I find on my ppc405gpr (IBM) board. So this should also work 
with ppc4xx processors too, not just MC6xxx right?

This appears to be a open implementation of the "wiggler" (or possibly 
"raven") product from Macraigor, right? Curious as to how it differs. I 
guess it works just as well since Leon P. now say this is what he uses 
(bdm4gdb==mpcdbm I think).

How do you go about programming flash on your target with mpcdbm/gdb?

> 
> 3. Now, we use BDI2000 with firmwares for MPC860 and MPC8260.
> 
> All of this tools works well...
> 
> Cheap cables are slow for upload large images and debugging, but it works...
> 
> We buy BDI2000 because we don't have any freely available cables for MPC 
> 8260, but this "cable" is very fast... and, because this, we also buy a 
> firmware for MPC860...  but we have single BDI2000 hardware, and this is
> enough...

Do you connect to your BDI2000 with ethernet? I can see why you just 
bought one since they are expensive (see my other message).

> 
> We have success with it in both operating systems we use in our 
> boards... RTEMS and Linux (for Linux especially, listed cheap debugger 
> cables is better than more other "cheap" debuggers available in the 
> market)... and gdb is probably more than 60% "secret" of this success....

So you mean cheap bdm4gdb adapter and cable works better on embedded 
linux than BDI2000? What other "cheap" debuggers have you used, Macraigor?

> 
> We also build some good software routines for production testing...
> and BDM cable is our only one tool for this...
> 
> 
> With good hardware debugging interface (BDM or JTAG), gdb is great tool, 
> not only for software debugging but also for hardware debugging, for
> any new and prototype board... at end, I'm hardware engineer only :).

Thanks for the info, boggy!

> 
> Best regards
> 
> -boggy
> 
> 
> 
> Smith, Gene wrote:
> 
> 
>>Does anyone have experience in loading and debugging rtems in a target 
>>having a jtag port (a.k.a. BDB, OCD)?  Can it do the same things in 
>>debugging rtems as a rom monitor?
>>
>>Thanks,
>>-gene
>>
>>
>>
>>
> 
>