Re: Timing Functionality on MPC555

Hi Eric,

Have you considered using the Decrementer?  The count
rate is documented in the UM.  Just move a value to
the decrementer, call your function, then move
decrementer to a GPR and read the value.  I use this
all the time.

regards,
Jay Cordaro
--- Eric <[email protected]> wrote:

> Hi everyone,
> 
> It seems like this should be fairly easy, but I'm
> having a hard time
> finding the right functionality.
> 
> I want to measure how long certain functions are
> taking in my code, so
> I want a way to track time rather accurately
> (precision on the order
> of micro-seconds, hopefully).  I was wondering what
> I should be using
> just to get two values - a starting time, and an
> ending time.  I was
> hoping to read directly from the real-time clock,
> but that seems to
> give garbage as output.
> 
> Anyone know what I should be looking at?
> 
> Thanks,
> 
> -Eric Castle
> 
> 
> 
> 


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