Re: tpu initialization...

Ronnie,

Yep, within main() I declare:

struct TPU3_tag *tpua = &TPU_A;

utilizing the framework layed out in m_tpu3.h with the base address 
of TPU_A being defined in mpc555.h in conjunction with m_common.h. In 
my tpu initialization c file, I assign values to: TPUMCR, TPUMCR3, 
TICR, CPR0, CPR1, CFSR3, HSRR1 and the PARM[][].  Stepping further 
through this function in debug mode, I've found the parameter ram is 
the only part of that function that actually assigns my values...  


Chris


--- In [email protected], "Higgins, Ronnie" 
<ronnie.higgins@h...> wrote:
> If this is a dumb question I apologize.  Has tpua been assign to 
the base
> address of the TPU?
> 
> Ronnie Higgins
> ronnie.higgins@h...
> Ph. 913-712-2559
> Fax. 913-712-2559 
> -----Original Message-----
> From: [email protected] [mailto:[email protected]] On 
Behalf Of
> csuozzo
> Sent: Friday, April 29, 2005 3:42 PM
> To: [email protected]
> Subject: [MPC500] tpu initialization...
> 
> I'm having a little problem getting the TPU up and running using 
the 
> data structures defined in mpc555.h.  I'm currently using a Phytec 
dev 
> board w/ mpc555 and Codewarrior IDE.  As I run my program in debug 
mode 
> (step by step), I notice that none of the lines of code that assign 
> values to the tpu registers actually change those values (starting 
at 
> 0x30400 for tpua).  They all retain their original value of 
0xFFFF.  
> Ex.
> 	tpua->TPUMCR.R = 0x6020;
> doesn't do anything; the value in this register following execution 
of 
> this line of code is still 0xFFFF.
> 
> My program is pretty simple, just programming one of the TPU 
channels 
> for PWM and initializing. Does anyone know why this might be 
happening?
> 
> Thanks,
> 
> Chris
> 
> 
> 
> 
> 
> -----------------------------------------------------------
> To learn more about Freescale Microcontrollers, please visit
> http://www.freescale.com/mcu
> 
> 
>  
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