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PHJ's avatar
PHJ
Icon for Occasional Contributor rankOccasional Contributor
7 years ago

mkpimage in Boot Tools User Guide

In section 7.3.2 of the Boot Tools User Guide (ug-1137 | 2018.09.24) is the following description​: "The header checksum for both versions of the mkpimage header is the CRC checksum of the byte valu...
PHJ's avatar
PHJ
Icon for Occasional Contributor rankOccasional Contributor
7 years ago

Hi Ahmed -

I confirmed this by adding a validation routine for new bootloader images that had version 1 of the header - the checksum was correct when done over (n-4) bytes ​- it also makes sense that the length (n) in version 0 headers are in 32-bit words compared with bytes in the version 1 header and therefore needs the x4 factor in the calculation only for version 0 headers.

The text "header checksum" is just incorrect - the header checksum is just the checksum of the header portion of the image - the image checksum is what is described.

Best Regards,

Paul