RE: [ethmac] Testbench for FCS

[Illan Glasner <IGlasner@mrv.com>]

Hi,

   why not simple send a random packet through your crc polinum and get the
crc than append it to the packet send this again to the crc machine and
verify you get the magic number.

now that you verify it remove the verification part leave only the random
packet generator and crc calculation and appending and walla you have a
"Automtic generator for Ethernet Frame".

next phase you can randomize the size of the packet and maybe even random on
the preamble length and wether or not an sfd will exsist in the packet and
even a bad crc packet from time to time and you get better coverage of your
core with very little effort.

have a nice day

   Illan

-----Original Message-----
From: Colin [mailto:colin.renfrew@sli-institute.ac.uk]
Sent: Tuesday, September 10, 2002 12:48 PM
To: ethmac@opencores.org
Subject: [ethmac] Testbench for FCS



Hi everyone,
                ok, so I have my Gigabit Eth MAC receiver. I've tested all 
parts of the system except the FCS check. I need frames for which the 
(FCS has already been calculated) to test my system properly, rather 
than creating random data for the frame and hand-calculating the FCS 
value! 

Is there a program around to automatically generate Ethernet frames 
(inc. FCS field) ? 

If not, can anyone advise an easy way to test that the FCS is working 
correctly?

Cheers,
Colin
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