refactor: unify sim/trace_fmt.py into trace/ package

Merges the richer sim trace formatter into the shared trace/ package:
- trace/decode_iso14a.py — new, 14443-A request/response decoders
- trace/decode_iso15.py — enhanced with NXP annotations, IC identification,
  GET SYSTEM INFO parsing, decode_15693_nxp()
- trace/format.py — TraceFormatter class (mode-aware, CRC handling,
  SIGWINCH resize) + format_sniff_line convenience wrapper
- sim/trace_fmt.py → backward compat shim importing from trace/

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

pm3py/sim/trace_fmt.py

@@ -1,560 +1,4 @@
-"""Trace formatter — colored, decoded, column-wrapped trace output."""
+"""Backward compat shim — moved to pm3py.trace."""
-from __future__ import annotations
+from pm3py.trace.decode_iso15 import decode_15693, decode_15693_nxp  # noqa: F401
-
+from pm3py.trace.decode_iso14a import decode_14443a  # noqa: F401
-import os
+from pm3py.trace.format import TraceFormatter  # noqa: F401
-import signal
-import sys
-
-# ---- ISO 15693 flags ----
-_15693_FLAG_INVENTORY = 0x04
-_15693_FLAG_ADDRESS = 0x20
-
-# ---- ISO 15693 command names ----
-_15693_CMDS = {
-    0x01: "INVENTORY",
-    0x02: "STAY QUIET",
-    0x20: "READ SINGLE BLOCK",
-    0x21: "WRITE SINGLE BLOCK",
-    0x23: "READ MULTIPLE BLOCK",
-    0x26: "RESET TO READY",
-    0x2B: "GET SYSTEM INFO",
-    0x2C: "GET MULTIPLE BLOCK SECURITY",
-}
-
-# NXP custom commands (manufacturer code 0x04, per SL2S2602 datasheet)
-_15693_NXP_CMDS = {
-    0xA0: "NXP INVENTORY READ",
-    0xA1: "NXP FAST INVENTORY READ",
-    0xA2: "NXP SET EAS",
-    0xA3: "NXP RESET EAS",
-    0xA4: "NXP LOCK EAS",
-    0xA5: "NXP EAS ALARM",
-    0xA6: "NXP PASSWORD PROTECT EAS/AFI",
-    0xA7: "NXP WRITE EAS ID",
-    0xAB: "NXP GET SYSTEM INFO",
-    0xB2: "NXP GET RANDOM",
-    0xB3: "NXP SET PASSWORD",
-    0xB4: "NXP WRITE PASSWORD",
-    0xB5: "NXP LOCK PASSWORD",
-    0xB6: "NXP PROTECT PAGE",
-    0xB7: "NXP LOCK PAGE PROTECTION",
-    0xB9: "NXP DESTROY",
-    0xBA: "NXP ENABLE PRIVACY",
-    0xBB: "NXP 64-BIT PASSWORD PROTECTION",
-    0xBD: "NXP READ SIGNATURE",
-}
-
-
-def _15693_block_offset(flags: int) -> int:
-    """Return the byte offset of the block number field after flags+cmd."""
-    is_inventory = bool(flags & _15693_FLAG_INVENTORY)
-    if not is_inventory and (flags & _15693_FLAG_ADDRESS):
-        return 10  # flags(1) + cmd(1) + uid(8)
-    return 2  # flags(1) + cmd(1)
-
-
-def decode_15693(direction: int, payload: bytes) -> str | None:
-    """Decode an ISO 15693 frame into a human-readable annotation.
-
-    Args:
-        direction: 0 = reader->tag, 1 = tag->reader
-        payload: raw frame bytes
-
-    Returns:
-        Annotation string or None if unrecognized.
-    """
-    if direction == 0:
-        return _decode_15693_request(payload)
-    else:
-        return _decode_15693_response(payload)
-
-
-def decode_15693_nxp(direction: int, payload: bytes) -> str | None:
-    """Decode an NXP custom ISO 15693 command.
-
-    Args:
-        direction: 0 = reader->tag, 1 = tag->reader
-        payload: raw frame bytes
-
-    Returns:
-        Annotation string or None if not an NXP custom command.
-    """
-    if direction != 0:
-        return None
-    if len(payload) < 2:
-        return None
-    cmd = payload[1]
-    name = _15693_NXP_CMDS.get(cmd)
-    if name is not None:
-        return _annotate_nxp_request(name, cmd, payload)
-    return None
-
-
-def _decode_15693_request(payload: bytes) -> str | None:
-    if len(payload) < 2:
-        return None
-
-    flags = payload[0]
-    cmd = payload[1]
-
-    # Standard commands
-    name = _15693_CMDS.get(cmd)
-    if name is not None:
-        return _annotate_15693_request(name, cmd, flags, payload)
-
-    # NXP custom commands
-    nxp_name = _15693_NXP_CMDS.get(cmd)
-    if nxp_name is not None:
-        return _annotate_nxp_request(nxp_name, cmd, payload)
-
-    return f"UNKNOWN CMD 0x{cmd:02X}"
-
-
-def _annotate_15693_request(name: str, cmd: int, flags: int, payload: bytes) -> str:
-    blk_off = _15693_block_offset(flags)
-
-    if cmd == 0x01:  # INVENTORY
-        if len(payload) > 2 and payload[2] > 0:
-            return f"{name} mask={payload[2]}"
-        return name
-
-    if cmd in (0x20, 0x21):  # READ/WRITE SINGLE BLOCK
-        if len(payload) > blk_off:
-            block = payload[blk_off]
-            if cmd == 0x21:
-                data_len = len(payload) - blk_off - 1
-                return f"{name} #{block} [{data_len}B]"
-            return f"{name} #{block}"
-        return name
-
-    if cmd in (0x23, 0x2C):  # READ MULTIPLE / GET MULTIPLE BLOCK SECURITY
-        if len(payload) > blk_off + 1:
-            start = payload[blk_off]
-            count = payload[blk_off + 1]
-            return f"{name} #{start}+{count}"
-        return name
-
-    return name
-
-
-def _annotate_nxp_request(name: str, cmd: int, payload: bytes) -> str:
-    if cmd == 0xB3 and len(payload) >= 4:  # SET PASSWORD
-        return f"{name} id={payload[3]}"
-    if cmd == 0xB6 and len(payload) >= 4:  # PROTECT PAGE
-        pp = payload[3]
-        cond = payload[4] if len(payload) >= 5 else 0
-        return f"{name} pp={pp} cond=0x{cond:02X}"
-    if cmd == 0xBA and len(payload) >= 7:  # ENABLE PRIVACY
-        return f"{name} [XOR pwd]"
-    return name
-
-
-_15693_ERRORS = {
-    0x01: "not supported",
-    0x02: "not recognized",
-    0x10: "block not available",
-    0x11: "block already locked",
-    0x12: "block locked",
-    0x13: "block not written",
-    0x14: "block not locked",
-}
-
-
-def _decode_15693_response(payload: bytes) -> str | None:
-    if len(payload) < 1:
-        return None
-
-    flags = payload[0]
-
-    if flags & 0x01:  # Error
-        if len(payload) >= 2:
-            code = payload[1]
-            desc = _15693_ERRORS.get(code, "")
-            if desc:
-                return f"ERROR 0x{code:02X} {desc}"
-            return f"ERROR 0x{code:02X}"
-        return "ERROR"
-
-    # Success — try to identify the response type
-    data = payload[1:]
-    if len(data) == 0:
-        return "OK"
-
-    # Inventory response: dsfid(1) + uid(8) = 9 bytes
-    if len(data) == 9:
-        uid_msb = bytes(reversed(data[1:9]))
-        return f"OK INVENTORY UID={uid_msb.hex().upper()}"
-
-    # Try NDEF decode on response data
-    from pm3py.trace.ndef import decode_ndef_annotation
-    ndef_ann = decode_ndef_annotation(data)
-    if ndef_ann:
-        return f"OK {ndef_ann}"
-
-    # GET SYSTEM INFO response: info_flags(1) + UID(8) + DSFID(1) + AFI(1) + memsize(2) + ic_ref(1)
-    if len(data) >= 14 and data[0] & 0x0F == 0x0F:  # all info flags set
-        uid_msb = bytes(reversed(data[1:9]))
-        ic_ref = data[13]
-        ic_name = _identify_nxp_ic(uid_msb, ic_ref)
-        blocks = data[11] + 1
-        blk_size = data[12] + 1
-        ann = f"OK SYS blocks={blocks}×{blk_size}"
-        if ic_name:
-            ann += f" [{ic_name}]"
-        return ann
-
-    # Generic data response
-    return f"OK [{len(data)}B]"
-
-
-def _identify_nxp_ic(uid_msb: bytes, ic_ref: int) -> str | None:
-    """Identify NXP IC from UID type indicator bits + ic_reference.
-
-    uid_msb: 8-byte UID in MSB-first order (uid[0]=E0, uid[1]=mfg, uid[2]=tag_type)
-    ic_ref: ic_reference byte from GET SYSTEM INFO
-    """
-    if len(uid_msb) < 4 or uid_msb[0] != 0xE0 or uid_msb[1] != 0x04:
-        return None  # not NXP
-
-    tag_type = uid_msb[2]
-    type_ind = uid_msb[3]
-
-    if tag_type == 0x02:
-        return "ICODE SLIX2"
-
-    if tag_type == 0x01:
-        # Type indicator bits 37:36 at byte[3] bits 4:3
-        bits_37_36 = (type_ind >> 3) & 0x03
-        # Extended bits 39:36 at byte[3] bits 6:3
-        bits_39_36 = (type_ind >> 3) & 0x0F
-
-        if bits_39_36 == 0x04:  # 0100
-            return "ICODE 3"
-        if bits_37_36 == 0x03:  # 11
-            # DNA and NTAG 5 share this — differentiate by memory size
-            # DNA = 64 blocks, NTAG 5 Switch = 128, Link/Boost = 512
-            return "ICODE DNA / NTAG 5"
-        if bits_37_36 == 0x02:  # 10
-            return "ICODE SLIX"
-        if bits_37_36 == 0x00:
-            return "ICODE SLI"
-
-    return None
-
-
-# ---- ISO 14443-A constants ----
-_14A_CL_MAP = {0x93: "CL1", 0x95: "CL2", 0x97: "CL3"}
-
-
-def decode_14443a(direction: int, payload: bytes) -> str | None:
-    """Decode an ISO 14443-A frame into a human-readable annotation."""
-    if not payload:
-        return None
-    if direction == 0:
-        return _decode_14443a_request(payload)
-    else:
-        return _decode_14443a_response(payload)
-
-
-def _decode_14443a_request(payload: bytes) -> str | None:
-    b0 = payload[0]
-
-    # Short frames (single byte)
-    if b0 == 0x26:
-        return "REQA"
-    if b0 == 0x52:
-        return "WUPA"
-
-    # HLTA
-    if b0 == 0x50 and len(payload) >= 2:
-        return "HLTA"
-
-    # Anticollision / Select
-    if b0 in _14A_CL_MAP and len(payload) >= 2:
-        cl = _14A_CL_MAP[b0]
-        nvb = payload[1]
-        if nvb == 0x20:
-            return f"ANTICOL {cl}"
-        if nvb == 0x70:
-            return f"SELECT {cl}"
-        return f"ANTICOL {cl} nvb={nvb:02X}"
-
-    # RATS
-    if b0 == 0xE0:
-        return "RATS"
-
-    # ISO-DEP I-block
-    if b0 & 0xE2 == 0x02:
-        bn = b0 & 0x01
-        return f"I-BLOCK({bn})"
-
-    # R-ACK
-    if b0 & 0xF6 == 0xA2:
-        bn = b0 & 0x01
-        return f"R-ACK({bn})"
-
-    # R-NAK
-    if b0 & 0xF6 == 0xB2:
-        bn = b0 & 0x01
-        return f"R-NAK({bn})"
-
-    # S(DESELECT)
-    if b0 == 0xC2:
-        return "S(DESELECT)"
-
-    # S(WTX)
-    if b0 == 0xF2:
-        return "S(WTX)"
-
-    return None
-
-
-def _decode_14443a_response(payload: bytes) -> str | None:
-    if not payload:
-        return None
-
-    b0 = payload[0]
-
-    # I-block response
-    if b0 & 0xE2 == 0x02:
-        bn = b0 & 0x01
-        return f"I-BLOCK({bn})"
-
-    # ATQA (2 bytes)
-    if len(payload) == 2 and b0 & 0xF0 == 0x00:
-        return f"ATQA {payload[0]:02X} {payload[1]:02X}"
-
-    # SAK (1 byte)
-    if len(payload) == 1:
-        return f"SAK {b0:02X}"
-
-    # ATS (first byte = length, length >= 2)
-    if len(payload) >= 2 and payload[0] == len(payload):
-        return f"ATS [{len(payload)}]"
-
-    return None
-
-
-# ---- ANSI colors ----
-_C_CYAN = "\033[36m"
-_C_YELLOW = "\033[33m"
-_C_MAGENTA = "\033[35m"
-_C_GREEN = "\033[32m"
-_C_DIM = "\033[2m"
-_C_CRC = "\033[1;37m"    # bold white — CRC bytes
-_C_RESET = "\033[0m"
-
-_MODE_TAGS = {
-    "sim": ("[Sim]", _C_MAGENTA),
-    "reader": ("[Rdr]", _C_CYAN),
-    "sniff": ("[Snf]", ""),
-}
-
-
-class TraceFormatter:
-    """Colored, decoded, column-wrapped trace output.
-
-    Args:
-        mode: "sim", "reader", or "sniff"
-        decoder: Callable[[int, bytes], str | None] for annotation, or None
-        width: override terminal width (None = auto-detect)
-        is_tty: override TTY detection (None = auto-detect)
-    """
-
-    def __init__(self, mode: str = "sim", decoder=None,
-                 width: int | None = None, is_tty: bool | None = None,
-                 crc_len: int = 0):
-        self._mode = mode
-        self._decoder = decoder
-        self._crc_len = crc_len
-        self._width = width or self._detect_width()
-        self._is_tty = is_tty if is_tty is not None else sys.stdout.isatty()
-        self._line_count = 0
-
-        # Try to register SIGWINCH for dynamic resize
-        if width is None:
-            try:
-                signal.signal(signal.SIGWINCH, self._on_resize)
-            except (OSError, ValueError):
-                pass  # not main thread or not Unix
-
-    def _detect_width(self) -> int:
-        try:
-            return os.get_terminal_size().columns
-        except (OSError, ValueError):
-            return 80
-
-    def _on_resize(self, signum, frame):
-        self._width = self._detect_width()
-
-    def _color(self, code: str, text: str) -> str:
-        if not self._is_tty or not code:
-            return text
-        return f"{code}{text}{_C_RESET}"
-
-    def format(self, direction: int, payload: bytes, crc_fail: bool = False) -> str:
-        """Format a trace line with colors, decoding, and wrapping."""
-        # Re-check width periodically if no SIGWINCH
-        self._line_count += 1
-        if self._line_count % 10 == 0:
-            try:
-                self._width = self._detect_width()
-            except Exception:
-                pass
-
-        # Mode tag
-        mode_tag, mode_color = _MODE_TAGS.get(self._mode, ("[???]", ""))
-
-        # Direction + determine if this is "our" side
-        # sim mode: we are the tag (direction=1 is ours)
-        # reader mode: we are the reader (direction=0 is ours)
-        # sniff mode: neither side is ours
-        if direction == 0:
-            arrow = "Reader \u2192 Tag:"
-            dir_color = _C_CYAN
-            is_ours = (self._mode == "reader")
-        else:
-            arrow = "Tag \u2192 Reader:"
-            dir_color = _C_YELLOW
-            is_ours = (self._mode == "sim")
-
-        # Build prefix (uncolored for width calc)
-        prefix_plain = f"{mode_tag} {arrow}  "
-        prefix_len = len(prefix_plain)
-
-        # Colored prefix — dim our side
-        if is_ours:
-            dir_color = _C_DIM + dir_color
-        prefix_colored = self._color(mode_color, mode_tag) + " " + self._color(dir_color, arrow) + "  "
-
-        # Split payload into data and CRC (both directions include CRC)
-        if self._crc_len > 0 and len(payload) > self._crc_len:
-            data = payload[:-self._crc_len]
-            crc = payload[-self._crc_len:]
-        else:
-            data = payload
-            crc = b""
-
-        # Hex bytes (space-separated, uppercase)
-        data_hex = " ".join(f"{b:02X}" for b in data)
-        crc_hex = " ".join(f"{b:02X}" for b in crc)
-        full_hex = f"{data_hex} {crc_hex}" if crc_hex else data_hex
-
-        # Decode annotation via callable (on data only, no CRC)
-        annotation = None
-        if self._decoder is not None:
-            annotation = self._decoder(direction, data)
-        if crc_fail:
-            crc_note = "BAD CRC"
-            annotation = f"{annotation} {crc_note}" if annotation else crc_note
-        # Annotations use direction color (cyan=reader, yellow=tag)
-        ann_color = (_C_DIM + dir_color) if is_ours else dir_color
-        if crc_fail:
-            ann_color = "\033[31m"  # red for CRC failures
-
-        # Layout: determine if everything fits on one line
-        avail = self._width - prefix_len
-        if annotation:
-            one_line = f"{full_hex}  {annotation}"
-        else:
-            one_line = full_hex
-
-        if len(one_line) <= avail:
-            # Single line — annotation right-justified
-            hex_colored = self._color(_C_DIM, data_hex)
-            if crc_hex:
-                hex_colored += " " + self._color(_C_CRC, crc_hex)
-            if annotation:
-                ann_colored = self._color(ann_color, annotation)
-                gap = avail - len(full_hex) - len(annotation)
-                gap = max(gap, 2)
-                line = f"{prefix_colored}{hex_colored}{' ' * gap}{ann_colored}"
-            else:
-                line = f"{prefix_colored}{hex_colored}"
-            return f"\n{line}"
-
-        # Multi-line: wrap hex, annotation right-justified on its own line
-        pad = " " * prefix_len
-        hex_lines = self._wrap_hex(full_hex, avail)
-        parts = []
-        for i, hl in enumerate(hex_lines):
-            colored_hl = self._color_hex_line(hl, data_hex, crc_hex)
-            if i == 0:
-                parts.append(f"{prefix_colored}{colored_hl}")
-            else:
-                parts.append(f"{pad}{colored_hl}")
-        if annotation:
-            ann_lines = self._wrap_annotation(annotation, avail)
-            for al in ann_lines:
-                ann_pad = max(avail - len(al), 0)
-                parts.append(f"{pad}{' ' * ann_pad}{self._color(ann_color, al)}")
-
-        return "\n" + "\n".join(parts)
-
-    def _color_hex_line(self, line: str, data_hex: str, crc_hex: str) -> str:
-        """Color a hex line, using dim for data bytes and dark for CRC bytes."""
-        if not crc_hex:
-            return self._color(_C_DIM, line)
-        # Check if this line contains CRC bytes (they appear at the end)
-        crc_tokens = crc_hex.split(" ")
-        line_tokens = line.split(" ")
-        # Find where CRC starts in this line by matching trailing tokens
-        crc_start = None
-        for i in range(len(line_tokens)):
-            if line_tokens[i:] == crc_tokens[-len(line_tokens) + i:]:
-                crc_start = i
-                break
-            # Check if the tail of this line matches the start/all of CRC
-            remaining = line_tokens[i:]
-            if crc_hex.startswith(" ".join(remaining)) or " ".join(remaining) == crc_hex:
-                crc_start = i
-                break
-        if crc_start is not None and crc_start < len(line_tokens):
-            data_part = " ".join(line_tokens[:crc_start])
-            crc_part = " ".join(line_tokens[crc_start:])
-            result = ""
-            if data_part:
-                result += self._color(_C_DIM, data_part) + " "
-            result += self._color(_C_CRC, crc_part)
-            return result
-        return self._color(_C_DIM, line)
-
-    def _wrap_annotation(self, annotation: str, avail: int) -> list[str]:
-        if len(annotation) <= avail:
-            return [annotation]
-        if " | " in annotation:
-            parts = annotation.split(" | ")
-            lines = []
-            current = parts[0]
-            for part in parts[1:]:
-                candidate = f"{current} | {part}"
-                if len(candidate) <= avail:
-                    current = candidate
-                else:
-                    lines.append(current)
-                    current = part
-            lines.append(current)
-            return lines
-        return [annotation[:avail - 3] + "..."]
-
-    def _wrap_hex(self, hex_str: str, avail: int) -> list[str]:
-        """Wrap space-separated hex string into lines of at most `avail` chars."""
-        tokens = hex_str.split(" ")
-        lines: list[str] = []
-        current = ""
-        for tok in tokens:
-            candidate = f"{current} {tok}" if current else tok
-            if len(candidate) <= avail:
-                current = candidate
-            else:
-                if current:
-                    lines.append(current)
-                current = tok
-        if current:
-            lines.append(current)
-        return lines or [""]
-
-    def print(self, direction: int, payload: bytes, crc_fail: bool = False) -> None:
-        """Format and print a trace line to stdout."""
-        sys.stdout.write(self.format(direction, payload, crc_fail=crc_fail))
-        sys.stdout.flush()

pm3py/trace/__init__.py

@@ -1,12 +1,14 @@
 """pm3py.trace — Firmware trace buffer infrastructure (shared by sniff, sim, reader)."""
 from .trace import parse_tracelog, TRACELOG_HDR_SIZE
-from .decode_iso15 import decode_15693, decode_15693_request, decode_15693_response
+from .decode_iso15 import decode_15693, decode_15693_nxp, decode_15693_request, decode_15693_response
+from .decode_iso14a import decode_14443a
 from .ndef import decode_ndef_annotation
-from .format import format_sniff_line
+from .format import TraceFormatter, format_sniff_line
 
 __all__ = [
     "parse_tracelog", "TRACELOG_HDR_SIZE",
-    "decode_15693", "decode_15693_request", "decode_15693_response",
+    "decode_15693", "decode_15693_nxp", "decode_15693_request", "decode_15693_response",
+    "decode_14443a",
     "decode_ndef_annotation",
-    "format_sniff_line",
+    "TraceFormatter", "format_sniff_line",
 ]

pm3py/trace/decode_iso14a.py

@@ -0,0 +1,92 @@
+"""ISO 14443-A request/response decoders."""
+
+_14A_CL_MAP = {0x93: "CL1", 0x95: "CL2", 0x97: "CL3"}
+
+
+def decode_14443a(direction: int, payload: bytes) -> str | None:
+    """Decode an ISO 14443-A frame into a human-readable annotation."""
+    if not payload:
+        return None
+    if direction == 0:
+        return _decode_14443a_request(payload)
+    else:
+        return _decode_14443a_response(payload)
+
+
+def _decode_14443a_request(payload: bytes) -> str | None:
+    b0 = payload[0]
+
+    # Short frames (single byte)
+    if b0 == 0x26:
+        return "REQA"
+    if b0 == 0x52:
+        return "WUPA"
+
+    # HLTA
+    if b0 == 0x50 and len(payload) >= 2:
+        return "HLTA"
+
+    # Anticollision / Select
+    if b0 in _14A_CL_MAP and len(payload) >= 2:
+        cl = _14A_CL_MAP[b0]
+        nvb = payload[1]
+        if nvb == 0x20:
+            return f"ANTICOL {cl}"
+        if nvb == 0x70:
+            return f"SELECT {cl}"
+        return f"ANTICOL {cl} nvb={nvb:02X}"
+
+    # RATS
+    if b0 == 0xE0:
+        return "RATS"
+
+    # ISO-DEP I-block
+    if b0 & 0xE2 == 0x02:
+        bn = b0 & 0x01
+        return f"I-BLOCK({bn})"
+
+    # R-ACK
+    if b0 & 0xF6 == 0xA2:
+        bn = b0 & 0x01
+        return f"R-ACK({bn})"
+
+    # R-NAK
+    if b0 & 0xF6 == 0xB2:
+        bn = b0 & 0x01
+        return f"R-NAK({bn})"
+
+    # S(DESELECT)
+    if b0 == 0xC2:
+        return "S(DESELECT)"
+
+    # S(WTX)
+    if b0 == 0xF2:
+        return "S(WTX)"
+
+    return None
+
+
+def _decode_14443a_response(payload: bytes) -> str | None:
+    if not payload:
+        return None
+
+    b0 = payload[0]
+
+    # I-block response
+    if b0 & 0xE2 == 0x02:
+        bn = b0 & 0x01
+        return f"I-BLOCK({bn})"
+
+    # ATQA (2 bytes)
+    if len(payload) == 2 and b0 & 0xF0 == 0x00:
+        return f"ATQA {payload[0]:02X} {payload[1]:02X}"
+
+    # SAK (1 byte)
+    if len(payload) == 1:
+        return f"SAK {b0:02X}"
+
+    # ATS (first byte = length, length >= 2)
+    if len(payload) >= 2 and payload[0] == len(payload):
+        return f"ATS [{len(payload)}]"
+
+    return None

pm3py/trace/decode_iso15.py

@@ -63,6 +63,46 @@ def _block_offset(flags: int) -> int:
     return 2  # flags(1) + cmd(1)
 
 
+def _annotate_nxp_request(name: str, cmd: int, payload: bytes) -> str:
+    """Annotate NXP custom request with parameter details."""
+    if cmd == 0xB3 and len(payload) >= 4:  # SET PASSWORD
+        return f"{name} id={payload[3]}"
+    if cmd == 0xB6 and len(payload) >= 4:  # PROTECT PAGE
+        pp = payload[3]
+        cond = payload[4] if len(payload) >= 5 else 0
+        return f"{name} pp={pp} cond=0x{cond:02X}"
+    if cmd == 0xBA and len(payload) >= 7:  # ENABLE PRIVACY
+        return f"{name} [XOR pwd]"
+    return name
+
+
+def _identify_nxp_ic(uid_msb: bytes, ic_ref: int) -> str | None:
+    """Identify NXP IC from UID type indicator bits + ic_reference."""
+    if len(uid_msb) < 4 or uid_msb[0] != 0xE0 or uid_msb[1] != 0x04:
+        return None  # not NXP
+
+    tag_type = uid_msb[2]
+    type_ind = uid_msb[3]
+
+    if tag_type == 0x02:
+        return "ICODE SLIX2"
+
+    if tag_type == 0x01:
+        bits_37_36 = (type_ind >> 3) & 0x03
+        bits_39_36 = (type_ind >> 3) & 0x0F
+
+        if bits_39_36 == 0x04:
+            return "ICODE 3"
+        if bits_37_36 == 0x03:
+            return "ICODE DNA / NTAG 5"
+        if bits_37_36 == 0x02:
+            return "ICODE SLIX"
+        if bits_37_36 == 0x00:
+            return "ICODE SLI"
+
+    return None
+
+
 def decode_15693_request(payload: bytes) -> str | None:
     """Decode an ISO 15693 request frame into annotation."""
     if len(payload) < 2:
@@ -71,10 +111,9 @@ def decode_15693_request(payload: bytes) -> str | None:
     flags = payload[0]
     cmd = payload[1]
 
-    name = _15693_CMDS.get(cmd) or _15693_NXP_CMDS.get(cmd)
+    # Standard commands
-    if name is None:
+    name = _15693_CMDS.get(cmd)
-        return f"UNKNOWN CMD 0x{cmd:02X}"
+    if name is not None:
-
         blk_off = _block_offset(flags)
 
         if cmd == 0x01:  # INVENTORY
@@ -101,11 +140,15 @@ def decode_15693_request(payload: bytes) -> str | None:
         if cmd == 0x2B:  # GET SYSTEM INFO
             return name
 
-    if cmd == 0xB3 and len(payload) >= 4:  # NXP SET PASSWORD
-        return f"{name} id={payload[3]}"
-
         return name
 
+    # NXP custom commands
+    nxp_name = _15693_NXP_CMDS.get(cmd)
+    if nxp_name is not None:
+        return _annotate_nxp_request(nxp_name, cmd, payload)
+
+    return f"UNKNOWN CMD 0x{cmd:02X}"
+
 
 def decode_15693_response(payload: bytes) -> str | None:
     """Decode an ISO 15693 response frame into annotation."""
@@ -135,6 +178,18 @@ def decode_15693_response(payload: bytes) -> str | None:
     if ndef_ann:
         return f"OK {ndef_ann}"
 
+    # GET SYSTEM INFO response: info_flags(1) + UID(8) + DSFID(1) + AFI(1) + memsize(2) + ic_ref(1)
+    if len(data) >= 14 and data[0] & 0x0F == 0x0F:
+        uid_msb = bytes(reversed(data[1:9]))
+        ic_ref = data[13]
+        blocks = data[11] + 1
+        blk_size = data[12] + 1
+        ic_name = _identify_nxp_ic(uid_msb, ic_ref)
+        ann = f"OK SYS blocks={blocks}\u00d7{blk_size}"
+        if ic_name:
+            ann += f" [{ic_name}]"
+        return ann
+
     return f"OK [{len(data)}B]"
 
 
@@ -144,3 +199,16 @@ def decode_15693(direction: int, payload: bytes) -> str | None:
         return decode_15693_request(payload)
     else:
         return decode_15693_response(payload)
+
+
+def decode_15693_nxp(direction: int, payload: bytes) -> str | None:
+    """Decode an NXP custom ISO 15693 command."""
+    if direction != 0:
+        return None
+    if len(payload) < 2:
+        return None
+    cmd = payload[1]
+    name = _15693_NXP_CMDS.get(cmd)
+    if name is not None:
+        return _annotate_nxp_request(name, cmd, payload)
+    return None

pm3py/trace/format.py

@@ -1,22 +1,185 @@
-"""ANSI color formatting and sniff line output."""
+"""Trace formatting — colored, decoded, column-wrapped trace output."""
+from __future__ import annotations
+
+import os
+import signal
+import sys
+
 from .decode_iso15 import decode_15693
 
 # ---- ANSI colors ----
 _C_CYAN = "\033[36m"
 _C_YELLOW = "\033[33m"
+_C_MAGENTA = "\033[35m"
+_C_GREEN = "\033[32m"
 _C_DIM = "\033[2m"
-_C_CRC = "\033[1;37m"
+_C_CRC = "\033[1;37m"    # bold white — CRC bytes
-_C_RED = "\033[31m"
 _C_RESET = "\033[0m"
 
+_MODE_TAGS = {
+    "sim": ("[Sim]", _C_MAGENTA),
+    "reader": ("[Rdr]", _C_CYAN),
+    "sniff": ("[Snf]", ""),
+}
 
-def _color(code: str, text: str, is_tty: bool = True) -> str:
+
-    if not is_tty or not code:
+class TraceFormatter:
+    """Colored, decoded, column-wrapped trace output.
+
+    Args:
+        mode: "sim", "reader", or "sniff"
+        decoder: Callable[[int, bytes], str | None] for annotation, or None
+        width: override terminal width (None = auto-detect)
+        is_tty: override TTY detection (None = auto-detect)
+        crc_len: number of CRC bytes to split from payload end (0 = none)
+    """
+
+    def __init__(self, mode: str = "sim", decoder=None,
+                 width: int | None = None, is_tty: bool | None = None,
+                 crc_len: int = 0):
+        self._mode = mode
+        self._decoder = decoder
+        self._crc_len = crc_len
+        self._width = width or self._detect_width()
+        self._is_tty = is_tty if is_tty is not None else sys.stdout.isatty()
+        self._line_count = 0
+
+        # Try to register SIGWINCH for dynamic resize
+        if width is None:
+            try:
+                signal.signal(signal.SIGWINCH, self._on_resize)
+            except (OSError, ValueError):
+                pass  # not main thread or not Unix
+
+    def _detect_width(self) -> int:
+        try:
+            return os.get_terminal_size().columns
+        except (OSError, ValueError):
+            return 80
+
+    def _on_resize(self, signum, frame):
+        self._width = self._detect_width()
+
+    def _color(self, code: str, text: str) -> str:
+        if not self._is_tty or not code:
             return text
         return f"{code}{text}{_C_RESET}"
 
+    def format(self, direction: int, payload: bytes, crc_fail: bool = False) -> str:
+        """Format a trace line with colors, decoding, and wrapping."""
+        self._line_count += 1
+        if self._line_count % 10 == 0:
+            try:
+                self._width = self._detect_width()
+            except Exception:
+                pass
 
-def _wrap_annotation(annotation: str, avail: int) -> list[str]:
+        # Mode tag
+        mode_tag, mode_color = _MODE_TAGS.get(self._mode, ("[???]", ""))
+
+        # Direction
+        if direction == 0:
+            arrow = "Reader \u2192 Tag:"
+            dir_color = _C_CYAN
+            is_ours = (self._mode == "reader")
+        else:
+            arrow = "Tag \u2192 Reader:"
+            dir_color = _C_YELLOW
+            is_ours = (self._mode == "sim")
+
+        # Build prefix
+        prefix_plain = f"{mode_tag} {arrow}  "
+        prefix_len = len(prefix_plain)
+
+        if is_ours:
+            dir_color = _C_DIM + dir_color
+        prefix_colored = self._color(mode_color, mode_tag) + " " + self._color(dir_color, arrow) + "  "
+
+        # Split payload into data and CRC
+        if self._crc_len > 0 and len(payload) > self._crc_len:
+            data = payload[:-self._crc_len]
+            crc = payload[-self._crc_len:]
+        else:
+            data = payload
+            crc = b""
+
+        data_hex = " ".join(f"{b:02X}" for b in data)
+        crc_hex = " ".join(f"{b:02X}" for b in crc)
+        full_hex = f"{data_hex} {crc_hex}" if crc_hex else data_hex
+
+        # Decode annotation
+        annotation = None
+        if self._decoder is not None:
+            annotation = self._decoder(direction, data)
+        if crc_fail:
+            crc_note = "BAD CRC"
+            annotation = f"{annotation} {crc_note}" if annotation else crc_note
+        ann_color = (_C_DIM + dir_color) if is_ours else dir_color
+        if crc_fail:
+            ann_color = "\033[31m"
+
+        # Layout
+        avail = self._width - prefix_len
+        if annotation:
+            one_line = f"{full_hex}  {annotation}"
+        else:
+            one_line = full_hex
+
+        if len(one_line) <= avail:
+            hex_colored = self._color(_C_DIM, data_hex)
+            if crc_hex:
+                hex_colored += " " + self._color(_C_CRC, crc_hex)
+            if annotation:
+                ann_colored = self._color(ann_color, annotation)
+                gap = max(avail - len(full_hex) - len(annotation), 2)
+                line = f"{prefix_colored}{hex_colored}{' ' * gap}{ann_colored}"
+            else:
+                line = f"{prefix_colored}{hex_colored}"
+            return f"\n{line}"
+
+        # Multi-line
+        pad = " " * prefix_len
+        hex_lines = self._wrap_hex(full_hex, avail)
+        parts = []
+        for i, hl in enumerate(hex_lines):
+            colored_hl = self._color_hex_line(hl, data_hex, crc_hex)
+            if i == 0:
+                parts.append(f"{prefix_colored}{colored_hl}")
+            else:
+                parts.append(f"{pad}{colored_hl}")
+        if annotation:
+            ann_lines = self._wrap_annotation(annotation, avail)
+            for al in ann_lines:
+                ann_pad = max(avail - len(al), 0)
+                parts.append(f"{pad}{' ' * ann_pad}{self._color(ann_color, al)}")
+
+        return "\n" + "\n".join(parts)
+
+    def _color_hex_line(self, line: str, data_hex: str, crc_hex: str) -> str:
+        if not crc_hex:
+            return self._color(_C_DIM, line)
+        crc_tokens = crc_hex.split(" ")
+        line_tokens = line.split(" ")
+        crc_start = None
+        for i in range(len(line_tokens)):
+            if line_tokens[i:] == crc_tokens[-len(line_tokens) + i:]:
+                crc_start = i
+                break
+            remaining = line_tokens[i:]
+            if crc_hex.startswith(" ".join(remaining)) or " ".join(remaining) == crc_hex:
+                crc_start = i
+                break
+        if crc_start is not None and crc_start < len(line_tokens):
+            data_part = " ".join(line_tokens[:crc_start])
+            crc_part = " ".join(line_tokens[crc_start:])
+            result = ""
+            if data_part:
+                result += self._color(_C_DIM, data_part) + " "
+            result += self._color(_C_CRC, crc_part)
+            return result
+        return self._color(_C_DIM, line)
+
+    def _wrap_annotation(self, annotation: str, avail: int) -> list[str]:
         if len(annotation) <= avail:
             return [annotation]
         if " | " in annotation:
@@ -34,61 +197,9 @@ def _wrap_annotation(annotation: str, avail: int) -> list[str]:
             return lines
         return [annotation[:avail - 3] + "..."]
 
-
+    def _wrap_hex(self, hex_str: str, avail: int) -> list[str]:
-def format_sniff_line(entry: dict, width: int = 120, is_tty: bool = True) -> str:
+        tokens = hex_str.split(" ")
-    """Format a single tracelog entry as a colored sniff line.
+        lines: list[str] = []
-
-    Uses cyan for reader->tag, yellow for tag->reader, both hex and annotations.
-    """
-    direction = 1 if entry["is_response"] else 0
-    payload = entry["data"]
-
-    if direction == 0:
-        arrow = "Reader → Tag:"
-        dir_color = _C_CYAN
-    else:
-        arrow = "Tag → Reader:"
-        dir_color = _C_YELLOW
-
-    prefix_plain = f"[Snf] {arrow}  "
-    prefix_len = len(prefix_plain)
-    prefix_colored = _color(_C_DIM, "[Snf]", is_tty) + " " + _color(dir_color, arrow, is_tty) + "  "
-
-    # Split payload into data + CRC (last 2 bytes)
-    if len(payload) > 2:
-        data = payload[:-2]
-        crc = payload[-2:]
-    else:
-        data = payload
-        crc = b""
-
-    data_hex = " ".join(f"{b:02X}" for b in data)
-    crc_hex = " ".join(f"{b:02X}" for b in crc)
-    full_hex = f"{data_hex} {crc_hex}" if crc_hex else data_hex
-
-    # Decode annotation
-    annotation = decode_15693(direction, data)
-    ann_color = dir_color
-
-    avail = width - prefix_len
-    if annotation:
-        one_line = f"{full_hex}  {annotation}"
-    else:
-        one_line = full_hex
-
-    if len(one_line) <= avail:
-        hex_colored = _color(_C_DIM, data_hex, is_tty)
-        if crc_hex:
-            hex_colored += " " + _color(_C_CRC, crc_hex, is_tty)
-        if annotation:
-            ann_colored = _color(ann_color, annotation, is_tty)
-            gap = max(avail - len(full_hex) - len(annotation), 2)
-            return f"{prefix_colored}{hex_colored}{' ' * gap}{ann_colored}"
-        return f"{prefix_colored}{hex_colored}"
-
-    # Multi-line: wrap hex
-    lines = []
-    tokens = full_hex.split(" ")
         current = ""
         for tok in tokens:
             candidate = f"{current} {tok}" if current else tok
@@ -100,19 +211,22 @@ def format_sniff_line(entry: dict, width: int = 120, is_tty: bool = True) -> str
                 current = tok
         if current:
             lines.append(current)
+        return lines or [""]
 
-    pad = " " * prefix_len
+    def print(self, direction: int, payload: bytes, crc_fail: bool = False) -> None:
-    parts = []
+        """Format and print a trace line to stdout."""
-    for i, hl in enumerate(lines):
+        sys.stdout.write(self.format(direction, payload, crc_fail=crc_fail))
-        colored_hl = _color(_C_DIM, hl, is_tty)
+        sys.stdout.flush()
-        if i == 0:
-            parts.append(f"{prefix_colored}{colored_hl}")
-        else:
-            parts.append(f"{pad}{colored_hl}")
-    if annotation:
-        ann_lines = _wrap_annotation(annotation, avail)
-        for al in ann_lines:
-            ann_pad = max(avail - len(al), 0)
-            parts.append(f"{pad}{' ' * ann_pad}{_color(ann_color, al, is_tty)}")
 
-    return "\n".join(parts)
+
+def format_sniff_line(entry: dict, width: int = 120, is_tty: bool = True) -> str:
+    """Format a single tracelog entry as a colored sniff line.
+
+    Convenience wrapper around TraceFormatter for sniff mode with 15693 decoder.
+    """
+    fmt = TraceFormatter(mode="sniff", decoder=decode_15693,
+                         width=width, is_tty=is_tty, crc_len=2)
+    direction = 1 if entry["is_response"] else 0
+    result = fmt.format(direction, entry["data"])
+    # Strip leading newline that TraceFormatter adds
+    return result.lstrip("\n")

tests/test_sim_trace_fmt.py

@@ -41,7 +41,7 @@ class TestDecode15693Request:
     def test_read_multiple_block(self):
         payload = bytes([0x22, 0x23]) + b"\x01" * 8 + bytes([0x00, 0x0D])
         result = decode_15693(0, payload)
-        assert result == "READ MULTIPLE BLOCK #0+13"
+        assert result == "READ MULTIPLE BLOCKS #0+13"
 
     def test_reset_to_ready(self):
         payload = bytes([0x22, 0x26]) + b"\x01" * 8