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aiedb's avatar
aiedb
Icon for Occasional Contributor rankOccasional Contributor
6 months ago

checksum of pof file inside cfm sector

hii i have general question if i have a pof file after compiling my vhdl design , is the checksum of the pof file get written into the cfm0 sector , and if i want to read the cheksum how can i do i...
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FvM's avatar
FvM
Icon for Super Contributor rankSuper Contributor
6 months ago
Hi,
a .pof file involves different checksum and crc fields. There's an overall crc16 in the two last bytes of the file which is verified when loading the file in programmer. The programmer displays a 32 bit checksum over the total configuration part of the file which may include multiple sectors, e.g. cfm0, cfm1 and ufm for max10, it's apparently only used to distinguish different versions and not stored in the file or verified. Individual sector data may contain additional check fields but they are not documented anywhere as far as I'm aware of. Thus there's no simple way to check configuration data consistency.