Re: Rookie needs help on MPC555 PMM

Carl,

A long time ago I created a sample program for the MPC555. It use PMM 
and PSP on TPU3_A and uses TPU3_B to generate input signals for it. I 
don't remember all of the details but the code should be easy to follow.

The sample program has the original A mask function in it and shows how 
to set everything up.

I don't think I can attach files to the mailing list so I will email it 
to you directly.

-Jeff

cj2xk wrote:
>
> Hello all!
>     I'm new to mpc555.
>     Here is my understanding of TPU3 PMM function and something about
> PMM I got confused of when I learned it. I'm not sure wether it is
> correct or not so I need you guys' help.
>     PMM function is not a pre-programmed function(or ROM function) of
> TPU3, not like the 16 standard ROM functions, right? It means the
> microcode of PMM function is not loaded into the ROM, it must be run in
> the TPU emulation mode, right? So, the function mask needs to be
> installed into the TPU and the microcode of PMM function needs to be
> loaded into the emulation RAM, right? What is this microcode? Is it a
> Hex code,asm code or anything else? DO I need to write the microcode of
> PMM myself or it is a standard function libarary which can be
> downloaded from freescale site? It seems complicated to me to run PMM.
> :(
>
> THANKS
> REGARDS
>
> carl
>
>
>
>
>
>
> -----------------------------------------------------------
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>
>  
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>
>
>
>  
>
>

-- Jeff
     ______________________________________________________________
    /        Jeff Loeliger              Freescale Semiconductor   /
   /                                    32-bit Embedded Division /
  /phone: +44-(0)1355-35-5400           East Kilbride           /
 /fax:    +44-(0)1355-35-6300           Scotland               /
/_____________________________________________________________/

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