Experimental Physics and
Industrial Control System

"Peregrine M. McGehee" <[email protected]> · Thu, 19 Sep 2002 20:53:54 -0600

We also use the Petra MVME-162s at the Sloan Digital Sky Survey,
with the BSP mod Andrew mentioned, and have experienced no
problems.

Andrew Johnson wrote:
> 
> Paul Sichta wrote:
> > I plan to buy a MVME-177 from Motorola in order to have a
> > second spare CPU.  They discontinued production of the model
> > MVME177-013 in August 2000, and now offer a replacement
> > based upon their Petra ASIC.  The part number is now
> > MVME177P-64SE.  Has anyone used the (new) Petra ASIC boards?
> > Are they swappable with the original MVME-177 boards?
> 
> We use Petra versions of the MVME-162 and MVME-172, which are completely
> plug compatible, although they do look a bit different to the older boards.
> 
> > Wind River doesn't make mention of a separate bsp for the
> > new MVME177P .
> 
> The same BSP works with both versions, although there is a one-line change
> that you should probably make (it's not clear whether it's still needed as
> it was a workaround for a bug in the Petra chip that might have been fixed
> in later versions, but as the modified code works with pre-Petra boards
> anyway it's worth making it just in case):
> 
> In the sys596IntDisable() routine (sysLib.c), replace the code
>      *PCC2_LANC_IRQ_CR &= ~LANC_IRQ_CR_IEN;
> with
>      *PCC2_LANC_IRQ_CR &= ~ABORT_IRQ_LEVEL;
> 
> Without this modification it is possible for a busy network to cause the
> network connection to become unreliable, although you might not notice it.
>   I have an similar change in all my mv16x and mv17x BSPs, just to be safe.
> 
> - Andrew
> --
> "Life is what happens while you're busy making other plans." - John Lennon

-- 
Peregrine M. McGehee    [email protected]      (505) 667-3273
Sloan Digital Sky Survey / Spallation Neutron Source
MS H820, Los Alamos National Laboratory, Los Alamos, NM 87545

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System