Sector magic word comment does not match actual value (FDB0 vs FDB1)

[vmut0228]

Description

While validating FlashDB sector headers from a real device dump, I noticed an inconsistency between the magic word macro value and its comment.

Current code:

/* magic word(`F`, `D`, `B`, `1`) */
#define SECTOR_MAGIC_WORD 0x30424446

However, 0x30424446 corresponds to "FDB0", not "FDB1".

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Evidence from real flash data

I exported the Flash region using STM32CubeProgrammer and parsed the sector headers:

• Raw bytes at magic offset: 46 44 42 30
• ASCII: "F" "D" "B" "0" → "FDB0"
• Little-endian u32: 0x30424446

This matches the macro value, but not the comment.

If the intended magic were "FDB1", the value should be:

• ASCII bytes: 46 44 42 31
• Little-endian u32: 0x31424446

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Conclusion

• The macro value 0x30424446 is correct and matches real flash data.
• The comment is incorrect and should be updated.

Suggested fix:

/* magic word(`F`, `D`, `B`, `0`) */
#define SECTOR_MAGIC_WORD 0x30424446

(or update the macro if "FDB1" is actually intended).

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Environment

• FlashDB version: #define FDB_SW_VERSION "2.1.1"
• MCU: STM32
• Flash dump verified via STM32CubeProgrammer