NutRegisterDevice() doesn't yield?

[steve-351]

Hi,

  I'm using

   NutRegisterDevice(&DEV_ETHER, 0x8300, 5);

  in a thread spawned by main() but it appears not to yield the processor
  while it operates.  If an ethernet cable is not plugged in then this locks
  the system until the watchdog times out.

  Is this the case or am I missing something and is there a work round?

  Thanks a lot for your help.

Kind Regards,
Steve.

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[Ole Reinhardt-2]

Hi Steve,

>   I'm using
>
>    NutRegisterDevice(&DEV_ETHER, 0x8300, 5);
>
>   in a thread spawned by main() but it appears not to yield the processor
>   while it operates.  If an ethernet cable is not plugged in then this locks
>   the system until the watchdog times out.
>
>   Is this the case or am I missing something and is there a work round?

Which platform do you use? At least for SAM7x this is correct and needs
to be modified.

Regards,

Ole Reinhardt


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[EnNut]

   Steve,
   If you are using the AT91SAM7X256 then you should look at:
nut\arch\arm\dev\AT91_emac.c to see what EMAC_LINK_LOOPS is set to.

I use
#define EMAC_LINK_LOOPS         50000
which is about 4.5 seconds.

The original value was 1000000 which is about 90 seconds. I think the
maximum watchdog timeout is 12 seconds.

Trying changing  EMAC_LINK_LOOPS.

There may be a way to change this in the configurator, but I'm not sure how.


   Zack


At 10:18 AM 9/28/2008, you wrote:

>Hi,
>
>   I'm using
>
>    NutRegisterDevice(&DEV_ETHER, 0x8300, 5);
>
>   in a thread spawned by main() but it appears not to yield the processor
>   while it operates.  If an ethernet cable is not plugged in then this locks
>   the system until the watchdog times out.
>
>   Is this the case or am I missing something and is there a work round?
>
>   Thanks a lot for your help.
>
>Kind Regards,
>Steve.
>
>_______________________________________________
>http://lists.egnite.de/mailman/listinfo/en-nut-discussion

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