Re: Where can I get a code sample for MPC555 PMM & PSP(in C language)?

Any C code you may come across for the TPU will simply be a macro 
mapping to direct writes to the memory-mapped registers of the TPU.
So e.g. to write to the PRAM[5][5] of TPU_A

e.g. from the TPUPN14 appnote:
  PRAM5_5 equ $ffff4a  ->  is just assigning a convenient name to 
$ffff4a (note this is the address for a 68332 NOT an MPC5XX)
  move.w #$0200,(PRAM5_5).l  ->  is writing the value '$200' to this 
location

e.g. from the MPC5XX header files:
  TPU_A.PARM.R[5][5] = $200;
(the header files will assign the correct address for you)
With the Macro expanded this becomes:
(*( struct TPU3_tag *) (0x00000000 + 0x304000)) .PARM.R[5][5] = 0x200;
Which compiles to:

e.g. from the MPC5XX 'quickstart' app:
  TPUSetParam(TPU_A, PSP, HIGH_TIME, $200);
(the quickstart code maps everything conveniently by name)
With the Macro expanded this becomes:
*TPU_A_PRMADDR_PSP_HIGH_TIME_CFG0 = 0x200;
Which again compiles to:
li       r0,512
lis      r3,48
sth      r0,16730(r3)

So it's all the same!
Learning and understanding that all you are ever doing is reading / 
writing memory-mapped registers is key to TPU programming.
Ian


--- In [email protected], "needafcukingid" <digitalhot@t...> wrote:
> --- In [email protected], "murphynetuk" <murphynetuk@y...> wrote:
> > Application notes TPUPN14, TPUPN15A, TPUPN15B cover these 
functions. 
> > They appear in the 68332 section of the Freescale site.
> > Ian
> > 
> > 
> 
> Thanks, murphynetuk.
> Those docs really help. But the examples are in asm, guess  c codes 
may 
> be not free. Anyway, thanks again.




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