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fix: accept canonical UF2 magic for RP-series deploy #1055

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Merged
zackees merged 1 commit into from
Jul 15, 2026
Merged

fix: accept canonical UF2 magic for RP-series deploy #1055

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9 changes: 8 additions & 1 deletion crates/fbuild-deploy/src/rp2040.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -23,7 +23,7 @@ use target::{
resolve_requested_runtime_target, select_cdc_candidate, serial_selector,
};

const UF2_MAGIC_START0: u32 = 0x0A32_4555;
const UF2_MAGIC_START0: u32 = 0x0A32_4655;
const UF2_MAGIC_START1: u32 = 0x9E5D_5157;
const UF2_MAGIC_END: u32 = 0x0AB1_6F30;
const UF2_FLAG_FAMILY_ID_PRESENT: u32 = 0x0000_2000;
Expand Down Expand Up @@ -758,6 +758,13 @@ mod tests {
);
}

#[test]
fn uf2_magic_matches_the_published_byte_sequence() {
assert_eq!(UF2_MAGIC_START0.to_le_bytes(), [0x55, 0x46, 0x32, 0x0A]);
assert_eq!(UF2_MAGIC_START1.to_le_bytes(), [0x57, 0x51, 0x5D, 0x9E]);
assert_eq!(UF2_MAGIC_END.to_le_bytes(), [0x30, 0x6F, 0xB1, 0x0A]);
}

#[test]
fn full_image_boot2_uses_xip_address() {
// Prefix emitted by the RP2040 second-stage bootloader in FastLED's
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