Experimental Physics and
Industrial Control System

Kate Feng <[email protected]> · Fri, 17 Sep 2004 14:52:58 -0400

Jeff Hill wrote:

> What symptoms did you observe that led to finding this fix? I just read that
> Kate observed a hang (which I assume means that RTEMS shut down).
>

When I posted the original message in June,  the IOC hung  for a while
and  rebooted itself.   At that time, I was using  the  RTEMS-mvme2307
default exception handler.   Also, there were other bugs in the
Oms58 motor driver, which complicated the issue.

Recently, I  modified the improved exception handler that Till wrote for
the SVGM PPC board,  and incorporated it into the mvme5500 board.
By doing so, the  symptom is that  RTEMS  shuts down and leaves
information about the stack traces and register context.   With those
information, Till  was able to trace back manually using  a disassembled
dump of the code.

The lesson I learn is  that one can actually debug the RTEMS application.
The  key point is to sharpen  the skill of  understanding the assembly codes.

P.S. :  The source codes  of the  mvme5500 BSP will be  available
upon request next week.  I will post  this again after I  update  the
the cexp and GeSys to the latest release that Till posted
on his  "RTEMS Evaluation CD".

Cheers,
Kate

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System