Re: Rookie needs help on MPC555 PMM

Also, the Freescale MPC5XX 'QuickStart' app will allow you to mix and 
match TPU functions from all sources using a GUI, automatically 
assemble a RAM image and includes both GUI and source code functions 
to initialise the TPU parameters correctly. Using 'QuickStart' I have 
PMM and PSP running off a simulated signal generated by QOM with no 
problems. It really is quite easy to do, but also has the dangerous 
side-effect of allowing you to get in way over your head very quickly 
indeed....:) Following Eric's advice will ensure you have a well-
founded education in the nitty-gritty of the TPU.
Ian


--- In [email protected], Eric McRae <eric@e...> wrote:
> It's not that hard.  Someone outlined the process here a while back.
> 
> The PMM source code is available from Freescale .  The assembler is 
out 
> there too (go to their site and search for "mask a", "mask g" 
and "tpu 
> assembler").  However, you should consider getting Bannoura and 
Dyson's  
> TPU book from http://www.amtpublishing.com.  It comes with the 
> production assembler.  Then you can assemble PMM and other 
functions of 
> your choice together into a microcode set.  The way you do this 
> determines the function ID's which the CPU uses to tell the TPU 
which 
> code to assign to which TPU channel.
> 
> The assembler produces an S-record file which you can manually load 
into 
> emulation RAM with most savvy debuggers.  You can also go to my 
site at 
> http://www.elmi.com and click on the "Free Software" button and 
download 
> source for a program which will eat the S-record file and produce 
an 
> array of unsigned longs which you can compile into your code and 
load 
> into the emulation RAM at boot time.  Just like any machine code, 
> microcode looks pretty much like data to anything besides a TPU.
> 
> If you're thinking of programming the TPU yourself, get the book 
and get 
> ASH WARE's simulator.  Both are worth their weight in gold if you 
value 
> your time at all.  Sorry if this looks like commercialism but the 
TPU is 
> a complicated device and these two products will drastically 
shorten 
> your learning curve.
> 
> You don't however, have to do any TPU programming to run PMM or any 
of 
> the other free functions.
> 
> 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.
> 
> 
> -- 
> Eric McRae, Electro-Logic Machines, Inc.
> 511 Root St., Port Townsend WA, 98368
> Phone/Fax: 360.379.0969, http://www.elmi.com





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