INNER CODE UNIT · Python

_on_message

Chanchaldhiman/CANviz · backend/canviz/cli.py:349

    def _on_message(msg: can.Message) -> None:
        arb_id = msg.arbitration_id
        now    = time.monotonic()
        data   = bytes(msg.data)

        # J1939 decode
        j1939_info: dict | None = None
        if j1939_store_inst is not None:
            j1939_info = j1939_store_inst.process_frame(
                arb_id=arb_id,
                data=data,
                is_extended=msg.is_extended_id,
            )
            # process_frame returns pgn_hex/sa_hex but not always names.
            # Look them up from the store's loaded pgn_db/sa_db directly.
            if j1939_info and not j1939_info.get("pgn_name"):
                pgn_db = getattr(j1939_store_inst, "pgn_db", {})
                sa_db  = getattr(j1939_store_inst, "sa_db",  {})

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