Re: [ethmac] rxaddrcheck

[lim_mg@yahoo.com]

thanks for clarification, i missed the fact that RxAbort is checked on 2 
cycles. i also made a mistake in my comment about your example on 
receivecontrol, your original post is correct.
my sincere apologies.


----- Original Message ----- 
From: yisonglin@s...  
To: ethmac@o...  
Date: Fri, 21 Feb 2003 09:39:52 -0100 
Subject: Re: [ethmac] rxaddrcheck 

> 
> 
> I don't think so. 
> 
> There are 2 RxClk per byte.So when bytecounter=7,RxAddressInvalid 
> is 
> asserted by the first RxClk,RxAbort is asserted by the 2nd RxClk. 
> 
> UnicastOK is updated 2 times per byte.I think it not need to do 
> so,though it will not lead to error.I prefer to check only once per 
> byte. 
> 
> BTW:I don't think it should be 48'h0080C4000801 in the example I 
> describled in my last post.Would you explain it in detail? 
> 
> ----- Original Message ----- 
> From: lim_mg@y... 
> To: ethmac@o... 
> Date: Fri, 7 Feb 2003 08:00:00 -0100 
> Subject: [ethmac] rxaddrcheck 
> 
> > 
> > 
> > just wonder if RxAbort is updated correctly in 
> eth_rxaddrcheck: 
> > 
> > RxAddressInvalid depends on UnicastOK which is finally updated 
> when 
> > ByteCnt is 7, so RxAbort should only be updated when ByteCnt 
> is 8 
> > and 
> > not 7. 
> > 
> > ..... 
> > assign RxAddressInvalid = ~(UnicastOK | BroadcastOK | 
> MulticastOK | 
> > r_Pro); 
> > ..... 
> > ..... 
> >   else if(RxAddressInvalid & ByteCntEq7 & RxCheckEn) 
> >     RxAbort <= #Tp 1'b1; 
> > ..... 
> > ..... 
> >   if(RxCheckEn & ByteCntEq7) 
> >     UnicastOK <= #Tp ( RxData[7:0] == MAC[7:0])   & 
> > UnicastOK; 
> > ..... 
> > ..... 
> > 
> 
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