Re: [ethmac] rxaddrcheck

[yisonglin@sina.com]

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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