[En-Nut-Discussion] Version of apploader in ethernut 2.1b and "continuous" appload issue

[Dima Zavin]

Ole,

Doh. I actually found this bug a while back and fixed it in my copy. I
should have sent the patch out. My bad. :( But this bug is still in
the original appload code that comes from ethernut. I really don't
think this is the same problem, as I don't remember seeing the arps in
the tcpdump trace. Though, I really should double check.

Thanks for bringing it to my attention.

--Dima


On 7/28/07, Ole Reinhardt <ole.reinhardt at embedded-it.de> wrote:
> Hi,
>
> > Watchdog is off. And if there was a stack overflow, it would be in the
> > appload code, so I would expect more people to see it?
>
> I'm currently working on eboot for a Mega2561 project. There I found
> another problem when using a tftp server on linux.
>
> >From time to time linux trys to refresh the arp table. During this time
> no more tftp packets can be send. So Linux sends an arp request packet
> but does not get a response. Instead NutOS tries to resend the tftp ack
> again and again. After three retries the tftp code fails with an error.
> This results in a partly flashed application, what easily can result in
> continous rebooting.
>
> I wrote a correct arp response function. No it works quite fine. Appload
> usese nearly the same code, so you perhaps you'r stuck in the same
> problem. Have you thought about using etherreal / wireshark to debug
> your problem?
>
> I will checkin the new eboot code tomorrow, if you like I can send you a
> copy as well.
>
> best regards,
>
> Ole Reinhardt
>
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