Tool/software:
Hi Champ,
My customer refers to our AN, slau887- MSPM0 Bootloader, to develop their boot code. And need CRC. It shows we need follow CRC32-ISO3309 polynomial and Final XOR value should be 0x0 shown as below.
Since most CRC32 calculation tools use Final XOR value = 0x1 we find, so want to get your help to know if CRC32-ISO3309 have specific definition of XOR value? It would be better if you can share ISO 3309 standard with us. Thanks!
BR,
Fengyu
Hi Helic,
slau887 4.2.2.3 CRC don't mention that final XOR value should be 0xF or 0x0.
I attached TRM 1.4.5.15 because I find below example in slau887. The CRC calculation result is aligned with TRM 1.4.5.15, nonmain BOOTCRC requirement, XOR=0x0.
You can refer to below calculation result from calculation tools. If we choose CRC32/ISO, the calculation result isn't the same as slau887's example. But CRC32/JMAMCRC does. This is why we are confused about the definition of CRC32-ISO3309. Hope to get your support to clarify the CRC32-ISO3309 standard.
BR,
Fengyu
