2 Commits

Author	SHA1	Message	Date
michael	f437e4e281	Remove application-layer CRC from SRAM mailbox protocol ... ISO15693 already provides CRC-16 at the transport layer, making the application-layer CRC redundant. Simplifies header from 6 to 4 bytes, removes crc16_continue/verify_crc, and drops STATUS_BAD_CRC. Also updates design doc and fixes markdown table formatting. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>	2026-03-05 17:40:56 -08:00
michael	8dfe9117af	Add SRAM mailbox protocol with all 7 command handlers ... Implements the NFC-to-MCU SRAM mailbox protocol in src/ntag5/sram.rs: - Command parsing with CRC-16/CCITT-FALSE verification - Response building with 4-byte-aligned SRAM writes - WRITE_PATTERN: stores 112-byte pattern entries to EEPROM - GET_STATUS: returns firmware version + library summary - SET_ACTIVE: changes the active pattern index in EEPROM header - SYNC_START/SYNC_END: bulk upload with deferred header CRC - READ_LIBRARY/READ_NEXT: iterative pattern readback - MailboxState struct for cross-command state tracking Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>	2026-03-05 16:16:12 -08:00