MPC834x global timers question

[Bruce_Leonard at selinc.com]

Never mind, I answered my own question.  Sorry for the noise.

Bruce

linuxppc-embedded-bounces+brucle=selinc.com at ozlabs.org wrote on 02/23/2007 
05:20:14 PM:

> I know this isn't the right forum for this but I can't seem to find a 
> generic PPC mailing list.
> 
> I'm trying to get a global timer going on an MPC834x, and the way I 
learn 
> is to just play with HW, so I've got an Abatron BDI2K hooked up to my 
> processor so I can just manipulate registers without having to deal with 

> writing code.  However, I seem to be unable to modify certain registers 
in 
> the global timers with this set up and I don't understand why. 
> Specifically, if a register has a bit that's a '1' following a reset, I 
> can't change that bit to a '0'.  This is happening with the Global 
Timers 
> Reference Registers (GTRFR1 - 4) and the Global Timers Prescale 
Registers 
> (GTPSR1 - 4).  The reset state of the GTRFRs is 0xFFFF and I can't 
change 
> it to any other value.  The reset state of the GTPSRs is 0x3 and I can't 

> clear the 2 LSB.  I can change any other bits in the prescale registers, 

> but not the two which are a '1' at reset.
> 
> Has anyone else seen this behavior?
> 
> Bruce
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