RE: [ethmac] rx_ethmac

[Jamil Khatib <jamilkhatib75@yahoo.com>]

I do not know exactly what you are talking about but
as far as I know that the MAC should detect the
preamble and SFD and it should generate them on the
transmit side.
The whole bytes should be generated and checked
These notes are available at least on the MII and RMII
interfaces

Regards
Jamil Khatib

--- Mahmud Galela <mgalela@vlsi.itb.ac.id> wrote:
> 
> 
> I wonder what you are thinking about preamble and
> SFD (not
> SDF...just kidding) pattern. 
> From previous e-mail (long time ago) i concluded
> that the SFD nibble can
> come from phy without preceeded by 1010.
> It means SFD can be located at first nibble or
> second niblle in a byte of
> data.
> 
> 
> 
> Thanks 
> 
> 
> Mahmud
> 
> 
> 
> On Tue, 13 Feb 2001, Illan Glasner wrote:
> 
> > 13-Feb-01
> > 
> >    Hi,
> > 
> > 	I belive your SDF detect is somewhat wrong.
> > 
> > as soon as you see rxdv you start to look for SDF
> > 
> > and your SFD is when you see 1101 
> > 
> > BUT the std specify SDF as both 0101 AND 1101
> togther and not only the
> > second nibble.
> > 
> > this mean unless I'm mistaken and do correct me if
> I missed soemthing
> > but that if the packet come with let say junk
> nibble and one of the junk
> > nibble have 1101 than you machine will thing it is
> a real packet and
> > will start reading it.
> > 
> > more over you might be not align as the 1101 might
> come in the first
> > nibble and not the second one.
> > 
> > have a nice day
> > 
> >    Illan
> 


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