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crc-24?


 

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Author Message
mokalan
New User



Joined: 26 Jul 2014
Posts: 1


Jul 26, 2014 1:50 pm

Hi,

I'm trying to figure out the type of checksum used in these segments.
It seems that the last three bytes are part of a checksum, I've tried crc-24, with all the standard parameters.
I'm not sure the checksum applies to all the data, so I tried every possible sub-segment of this data. It didn't work.
It might be a crc16 with one of the bytes as the init.

I'm really interested in the right way to approach this kind of problems.

what am I missing, can anyone help?

Code:

0000  0d 99 03 85 4f aa 5d 33  97 2a 65 cc 2b 00 00 00
0010  00 00 00 00 00 00 00 00  0e 0c 66 0d a9 a0 1c 17
0020  81 81 08 69 48 7c c0 37  b1 90 46 04 8a 0a 33 3f
0030  48 32 6c 64 e0 00 60 5a  a3 35 f9 0d 6d 8d 95 16
0040  5e 10 00 00 00 00 00 00  00 00 00 00 00 00 00 00
0050  00 00 00 00 00 00 00 00  23 02 00 00 1e 00 04 00
0060  7f d0 16 46 00 00 00 00  1c 70 53 33 a6 3e

0000  0d 99 03 85 4f aa 5d 33  97 2a 65 cc 2b 00 00 00
0010  00 00 00 00 00 00 00 00  0e 1c 1e 0d a9 a0 1c 17
0020  81 81 08 69 48 7e 28 37  b1 90 46 04 8a 0a 33 3f
0030  43 32 6c 64 e0 00 60 5a  a3 35 f9 0d 6d 8d 95 16
0040  5e 10 00 00 00 00 00 00  00 00 00 00 00 00 00 00
0050  00 00 00 00 00 00 00 00  23 02 00 00 1e 00 04 00
0060  7f d0 16 46 00 00 00 00  1c 70 53 eb df 39

0000  0d 99 03 85 4f aa 5d 33  97 2a 65 cc 2b 00 00 00
0010  00 00 00 00 00 00 00 00  0e 23 2e 0d a9 a0 1c 17
0020  81 81 08 69 48 83 28 37  b1 90 46 04 8a 0a 33 3f
0030  4f 32 6c 64 e0 00 60 5a  a3 35 f9 0d 6d 8d 95 16
0040  5e 10 00 00 00 00 00 00  00 00 00 00 00 00 00 00
0050  00 00 00 00 00 00 00 00  23 02 00 00 1e 00 08 00
0060  7f d0 16 46 00 00 00 00  1c 70 53 2a 48 da

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