topic Re: System Timer Module activation on MPC564xB board in MPC5xxx

System Timer Module activation on MPC564xB board

skpavankumar — Fri, 11 Oct 2013 12:36:56 GMT

Hi Everybody,

I'm trying to activate the system timer module (STM) on a MPC564xB board and try to read it's value.

Does any one of you already have a working code, so that I can re-use the same?

Thanks!

Pavan

skpavankumar — Tue, 15 Oct 2013 06:33:26 GMT

Hi Everybody,

I tried to enable the STM module, with a prescalar "0x50" using the below code, but the register value doesn't seem to change.

#define STMCR ( *(volatile unsigned long *) 0xFFF3C000 );

STMCR = 0x80500000;

Can some one please help me out on this aspect?

Am I missing out on something here?

Is there a protection mechanism which is preventing me to write into this register?

Thanks.

Cheers,

Pavan

PetrS — Fri, 08 Nov 2013 11:37:20 GMT

Hi,

You are writing to the wrong bit positions. Use following...

STMCR = 0x00005001;

Regards,

Petr

skpavankumar — Fri, 22 Nov 2013 03:55:18 GMT

Hi Petr,

Thanks for pointing out the mistake! It now works :-)

Kind Regards,

Pavan