Hi,
I am reading through SNLA342 and the way in which the CRC-8 calculations are described are a little confusing. I'm assuming polynomial value of 0x07 is being used, as the documentation does not specify this.
Using the example given with Table 4 of SNLA342 as reference:
CRC-8 Input = 0x10F1811220F2811A02
Computed CRC-8 = 0x9C
This checksum value appears to be the checksum of each individual ASCII character value:
CRC8(0x31 0x30 0x46 0x31 0x38 0x31 0x31 0x32 0x32 0x30 0x46 0x32 0x38 0x31 0x31 0x41 0x30 0x32) = 0x9C
As opposed to the checksum of each byte of data:
CRC8(0x10 0xf1 0x81 0x12 0x20 0xf2 0x81 0x1a 0x02) = 0xC5
(Was this the intended behaviour?)
The EEPROM HEX file example in Section 5.2 does not seem to perform either of the two calculations above:
CRC-8 Input = 0x102B811310278123
Computed CRC-8 (as written in the documentation) = 0xA6
Checksum of each individual ASCII character value:
CRC8(0x31 0x30 0x32 0x42 0x38 0x31 0x31 0x33 0x31 0x30 0x32 0x37 0x38 0x31 0x32 0x33) = 0x58
Checksum of each byte of data:
CRC8(0x10 0x2b 0x81 0x13 0x10 0x27 0x81 0x23) = 0x33
Neither of these two computed values match the value written in the documentation.
Any pointers with this would be much appreciated.
Best regards,
KM
