Jesse Off wrote this message on Thu, May 18, 2006 at 12:29pm:
for some reason I didn't get your original message... so I'm finally
replying now...
> One thing you should make sure is you're setting the full duplex bit
> in the MAC if you get full duplex from the PHY autonegotiation.
Yep, I do...
> Excessive collisions might also make an error like that happen though
> I'm not 100% on that. There also is an errata on the ep93xx ethernet,
Well, I shouldn't be getting any as I'm at 100mbit full duplex...
> though I think that has to do with small frame reception and not TX.
> Another thing is the MAC has to arbitrate for access to the ep93xx AHB
> bus against USB, the CPU, and other peripherals so if that internal
> bus is busy, it is feasible that a TX underrun could happen every now
> and again though I hardly think it is a horrible failure worthy of the
Well, the problem is that it's isn't every now and again.. No matter
what I do, I cannot send that packet.. it happens on ever boot.. when
I do a manual dns query: host 192.168.0.1 but if I change the length
slightly: host 192.168.0.14 it works.. No matter what is going on,
the packet will not transmit...
> users attention. If you're really worried about it, I'm pretty sure
> theres a register in the ep93xx somewhere to increase the arbiter
> priority of the MAC.
Well, the problem is that this bug makes the board close to unusable,
since some packets won't TX... it's not that the packet will finally
go through, the same data will never be transmitted...
--
John-Mark Gurney Voice: +1 415 225 5579
"All that I will do, has been done, All that I have, has not."
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