ARINC 429

An independent ARINC 429 line-level transceiver, written clean-room from the public ARINC 429 word-format specification — not derived from our own arinc429 RTL — so it functions as a true second source. Ships with a passive protocol checker that independently recomputes ODD parity over each 32-bit word and verifies the bit-period grid (both low-speed 12.5 kbit/s and high-speed 100 kbit/s) on the wire, plus a self-checking interop TB proving both directions (RX into the catalog arinc429, TX out of it) at both speeds against the real APB4 register interface, including the label-based accept-list filter. Covers the core word-level protocol (LABEL/SDI/DATA/SSM framing, odd parity, dual bit-rate timing, label filtering) — BPRZ line-level (analog) encoding and multi-drop bus contention are out of scope, matching the DUT’s own digital-model boundary.

Key Features

• Independent line-level transceiver: SEND_WORD/RECV_WORD task API + a SEND_WORD_BAD_PARITY error-injection primitive, both LP_DIV (12.5 kbit/s) and HP_DIV (100 kbit/s) bit-period coverage
• Passive protocol checker: word-parity legality (recomputed independently) and bit-period-grid legality on the wire, at either configured speed
• Self-checking interop TB against the catalog’s arinc429: RX path, TX path, and the label-based accept-list filter (accept/reject) — all pass at both speeds
• Scope today is the digital word-level protocol only; BPRZ analog line encoding and multi-drop/multi-sink bus arbitration are out of scope, same boundary as the DUT itself

Standards & Compliance

ARINC 429 (Mark 33 Digital Information Transfer System)

Pairs With

Built to lean against these catalog IPs during integration:

• arinc429