Forum Post: RE: Noise filter on dm365!

Hi Vladimir,

we finally got the KTNF to work.

Try to replace the following line...

  sysRegBase = DM365MM_mmap(0x01C40000,0x4000);

with these...

  int fm = open("/dev/mem",O_RDWR|O_SYNC);

  sysRegBase = (int)mmap( (void*)0,

      0x4000,

      PROT_READ | PROT_WRITE,

      MAP_SHARED,

      fm,

      0x01C40000);

You can do a quick check by requesting the physical address...

  inPhysAddr = OSA_cmemGetPhysAddr(sysRegBase);  

  OSA_printf("RESULT - inPhysAddr: %x \n", inPhysAddr);

...if this returns 0x01C40000 KTNF should work. (If it returns 0x1000 it won't.)

You may need these additional includes...

#include <sys/mman.h>

#include <sys/types.h>

#include <fcntl.h>

Also check this post which also describes the problem with the DM365MM_mmap...

http://e2e.ti.com/support/embedded/multimedia_software_codecs/f/356/t/157164.aspx#571410

I could'nt reproduce the "kind of red'ish" output frames you've mentioned in your last post, because unfortunately I don't have access to the new version of libktnf.

Hope it helps.

Yours,

Martin