RE: [ethmac] rx_ethmac

[Mahmud Galela <mgalela@vlsi.itb.ac.id>]

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