Pattern entry bytes 108-109 now hold next_pattern (0xFF=loop forever,
0-8=chain to index) and loop_count. MCU will poll LP5562 STATUS register
to detect engine completion and load the successor pattern.
Updated XBLK format spec, Rust Pattern struct (serializer + deserializer),
and React Native app design doc (binary format, data model, resolved
open questions).
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
XBLK binary format for pattern library in NTAG5 upper 1K EEPROM:
- 16-byte header (magic, version, pattern count, active index, CRC-16)
- Up to 9 × 112-byte fixed-size pattern entries
- Deserializer + serializer in src/pattern/mod.rs
- MCU self-provisions hardcoded patterns on first boot (no XBLK found)
- Subsequent boots load active pattern directly from EEPROM
- Python serializer tool for future PCSC-based pattern uploads
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
