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I am trying to caclulate a checksum algorithm. D0 is CRC, D1 to D2 is data. Maybe someone can help me with algorithm for checksum calculation?

D0  D1  D2  D3
68  00  01  00
74  00  03  00
DD  01  01  00
C1  01  03  00
2D  02  01  00
31  02  03  00
98  03  01  00
84  03  03  00
E2  04  01  00
FE  04  03  00
57  05  01  00
4B  05  03  00
A7  06  01  00
BB  06  03  00
12  07  01  00
0E  07  03  00
53  08  01  00
4F  08  03  00
E6  09  01  00
FA  09  03  00
16  0A  01  00
0A  0A  03  00
A3  0B  01  00
BF  0B  03  00
D9  0C  01  00
C5  0C  03  00
6C  0D  01  00
70  0D  03  00
9C  0E  01  00
80  0E  03  00
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    In your title you mentioned "CAN". If you are referring to the well known CAN-bus have you checked it's documentation where the used CRC method is described?
    – Robert
    Commented Oct 25, 2020 at 10:45

1 Answer 1

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If you have more messages you could try this for reverse engineering checksums: https://github.com/laurenlabell/checksum_finder

For CRCs there's a tool called CRCRevEng which is harder to use, but can tackle CRCs.

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