how to generate CRC from given package

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pini_1

Joined: 18 Jun 2007
Posts: 288
Helped: 17

22 Oct 2009 8:38 ethrenet crc

Can someone tell me the crc of the following packet (the last four zero bytes are supposed to be the CRC).

00 AA 00 62 C6 09
00 E0 F7 26 3F E9
08 00
45 00 00 54 AA FB 40 00 FC 01 FA 30 8B 85 E9 02
8B 85 D9 6E 00 00 45 DA 1E 60 00 00 33 5E 3A B8
00 00 42 AC 08 09 0A 0B 0C 0D 0E 0F 10 11 12 13
14 15 16 17 18 19 1A 1B 1C 1D 1E 1F 20 21 22 23
24 25 26 27 28 29 2A 2B 2C 2D 2E 2F 30 31 32 33
00 00 00 00

koggestone

Joined: 16 Oct 2008
Posts: 31
Helped: 2

23 Oct 2009 15:15 Re: ethrenet crc

u can take verilog's help to do this

1) design the ethernet CRC32 polynomial in Verilog.
( should be straightforward made of 32 flops and
some xor gates structurally connected as per polynomial.

2) shift in your data into these 32 flops.(using
simple verilog testbench)

3) after u shifted all your data, whatever is
the value of the 32 flops is your 32 bit CRC.