DFU-SUFFIX(1)

💖 DFU-SUFFIX 💖

okay bestie, so you know how dfu-suffix is a thing that lives in the dfu-util family? yeah. she adds, checks, or yeets a DFU firmware file suffix. that's the whole vibe. this is the manual page for her, and honestly? she's iconic. 🎀

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✨ SYNOPSIS ✨

dfu-suffix [options] --add DFU_FILE
dfu-suffix --check DFU_FILE
dfu-suffix --delete DFU_FILE
dfu-suffix --help
dfu-suffix --version

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🌸 DESCRIPTION 🌸

so dfu-suffix is the little tool you call when you wanna add, check, or remove a DFU firmware file suffix. and like, why would you even want that? because a suffix is the recommended way to safely match up a firmware file with the device it belongs to. it's giving ✨compatibility check✨.

but bestie, real talk: a suffix is recommended by the DFU standard, but it is not required. nobody's forcing you. 🫶

here's the tea though — a DFU host tool like dfu-util will recognize the suffix and use it to check that the device is matching. but it will not transfer the suffix to the device. the suffix stays home. it does not make the trip. periodt. 💅

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💅 OPTIONS 💅

• -v, --vid vendorID — specify the USB vendor ID, and yes it's in hexadecimal bestie.
• -p, --pid productID — specify the USB product ID, also hexadecimal.
• -d, --did deviceID — specify the USB device ID, hexadecimal again, we love consistency.
• -S, --spec version — specify the DFU specification version, you guessed it, hexadecimal.
• -h, --help — displays a help message. the classic. 🫶
• -V, --version — displays the software version. slay.

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🌈 EXAMPLES 🌈

okay so here's what it actually looks like in the wild:

dfu-suffix --vid 0123 --add firmware.dfu

adds a suffix matching vendor 0x0123 and product ID 0x4567. and the way that product and device ID are not specified here?? so they're just gonna contain the wildcard value 0xFFFF. mystery IDs, main character energy. 👑

dfu-suffix --check firmware.dfu

checks the file firmware.dfu for a valid DFU suffix. vibe check, but for firmware. 🔥

dfu-suffix --delete firmware.dfu

removes a valid DFU suffix from the file firmware.dfu. bye babe 💖

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⭐ EXIT VALUES ⭐

• 0 — success! 🎉 (also if the suffix is missing, so don't panic, she's chill about it)
• -64 — usage error. you did something funky with the arguments, bestie 😭

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🙈 LIMITATIONS 🙈

ngl, dfu-suffix can not tell a broken DFU suffix (like, e.g. a checksum mismatch 💀) apart from a suffix that doesn't exist at all. so the consequence is: only a valid suffix can be removed. if it's broken, she literally cannot see it. that's just how it is.

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💀 BUGS 💀

found a bug? take it here, not to me:

https://sourceforge.net/p/dfu-util/tickets/

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👑 COPYRIGHT 👑

License GPLv2: GNU GPL version 2

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🦋 SEE ALSO 🦋

dfu-prefix(1), dfu-util(1)

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🌸 AUTHORS 🌸

See AUTHORS file in source. (iykyk 💜)

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okay and that's the whole page, bestie! this was dfu-util version 0.11, from September 2021 — shoutout to the era that brought us this absolute icon. mwah, bye! 💖✨🎀