[ECOS] watchdog - powerpc

Bob Koninckx bob.koninckx@mech.kuleuven.ac.be
Mon May 19 21:14:00 GMT 2003


Powerpc _enables_ the watchdog by default. According to the hardware
manual you can only disable it out of reset but never re-enable it
afterwards.

from the spec ... SYPCR

This register can be read at any time but can be written only once after
system reset ...

I do not think you want a watchdog in redboot. But then redboot needs to
disable it, meaning you can not use it in the application afterwards
either. On the other hand, leaving it enabled in redboot gives the
application a chance to decide. But then you'll end up having problems
in redboot if you do not start the application fast enough. Am I missing
something ?

Bob


-- 
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ir. Bob Koninckx
Katholieke Universiteit Leuven
Division Production Engineering,                   tel.  +32 16 322535
Machine Design and Automation                      fax.  +32 16 322987
Celestijnenlaan 300B                  bob.koninckx@mech.kuleuven.ac.be
B-3001 Leuven Belgium               http://www.mech.kuleuven.ac.be/pma
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