Add Device, Stream, and Config screens to TUI (F6-F8)

Expand from 5 to 8 mode screens. F6 Device provides firmware
management, EEPROM flash with full safety state machine (C2
validation, auto-backup, 3s countdown, page write, byte verify),
and diagnostics (boot test, I2C scan, register dump). F7 Stream
does live TS capture with PID distribution and PAT/PMT tree.
F8 Config manages LNB power, DiSEqC switching, and modulation/FEC.

Foundation: 12 new SkyWalker1 methods (device info, FX2 RAM,
EEPROM I2C, diagnostics), matching DemoDevice synthetics with
realistic C2 image and TS packets, 20 bridge wrappers (RLock).

tools/skywalker_lib.py

@@ -480,6 +480,123 @@ class SkyWalker1:
                                index=count, length=count)
         return bytes(data)
 
+    # -- Device info (extended) --
+
+    def get_serial_number(self) -> bytes:
+        """Read 8-byte serial number from device."""
+        return self._vendor_in(CMD_GET_SERIAL_NUMBER, length=8)
+
+    def get_usb_speed(self) -> int:
+        """Read USB connection speed. 0=unknown, 1=Full, 2=High."""
+        data = self._vendor_in(0x07, length=1)
+        return data[0]
+
+    def get_vendor_string(self) -> str:
+        """Read vendor string descriptor from FX2."""
+        data = self._vendor_in(0x0C, length=64)
+        return bytes(data).rstrip(b'\x00').decode('ascii', errors='replace')
+
+    def get_product_string(self) -> str:
+        """Read product string descriptor from FX2."""
+        data = self._vendor_in(0x0D, length=64)
+        return bytes(data).rstrip(b'\x00').decode('ascii', errors='replace')
+
+    # -- FX2 RAM access (standard Cypress A0 vendor request) --
+
+    def fx2_ram_read(self, addr: int, length: int) -> bytes:
+        """Read FX2 internal RAM via A0 vendor request. Non-destructive."""
+        length = max(1, min(64, length))
+        data = self.dev.ctrl_transfer(
+            usb.util.CTRL_TYPE_VENDOR | usb.util.CTRL_IN,
+            0xA0, addr, 0, length, 2000
+        )
+        if self.verbose:
+            raw = bytes(data).hex(' ')
+            print(f"  RAM IN  addr=0x{addr:04X} len={length} -> {raw}")
+        return bytes(data)
+
+    def fx2_ram_write(self, addr: int, data: bytes) -> int:
+        """Write FX2 internal RAM via A0 vendor request. Reverts on power cycle."""
+        if self.verbose:
+            raw = data.hex(' ')
+            print(f"  RAM OUT addr=0x{addr:04X} len={len(data)} data={raw}")
+        return self.dev.ctrl_transfer(
+            usb.util.CTRL_TYPE_VENDOR | usb.util.CTRL_OUT,
+            0xA0, addr, 0, data, 2000
+        )
+
+    def fx2_cpu_halt(self) -> None:
+        """Halt FX2 CPU by writing 1 to CPUCS register (0xE600)."""
+        self.fx2_ram_write(0xE600, b'\x01')
+
+    def fx2_cpu_start(self) -> None:
+        """Release FX2 CPU by writing 0 to CPUCS register (0xE600)."""
+        self.fx2_ram_write(0xE600, b'\x00')
+
+    # -- EEPROM access (via I2C proxy commands) --
+
+    EEPROM_SLAVE = 0x51
+    EEPROM_PAGE_SIZE = 16
+    EEPROM_WRITE_CYCLE_MS = 10
+
+    def eeprom_read(self, offset: int, length: int = 64) -> bytes:
+        """Read from boot EEPROM at given offset via I2C."""
+        return self._vendor_in(CMD_I2C_READ, value=self.EEPROM_SLAVE,
+                               index=offset, length=length)
+
+    def eeprom_write_page(self, offset: int, data: bytes) -> int:
+        """Write a page (up to 16 bytes) to EEPROM. Caller handles alignment."""
+        return self._vendor_out(CMD_I2C_WRITE, value=self.EEPROM_SLAVE,
+                                index=offset, data=data)
+
+    def eeprom_read_all(self, size: int = 16384) -> bytes:
+        """Read entire EEPROM contents up to size bytes."""
+        chunk_size = 64
+        result = bytearray()
+        for offset in range(0, size, chunk_size):
+            remaining = min(chunk_size, size - offset)
+            chunk = self.eeprom_read(offset, remaining)
+            result.extend(chunk)
+        return bytes(result)
+
+    # -- Diagnostics --
+
+    def boot_debug(self, mode: int) -> dict:
+        """
+        Run boot diagnostic with specified mode byte.
+
+        Modes: 0x80=no-op, 0x81=GPIO init, 0x82=I2C probe,
+               0x83=BCM4500 reset, 0x84=FW load, 0x85=full boot.
+        Returns 3-byte status: {stage, result, detail}.
+        """
+        data = self._vendor_in(CMD_BOOT_8PSK, value=mode, length=3)
+        return {
+            "stage": data[0],
+            "result": data[1],
+            "detail": data[2],
+        }
+
+    def i2c_bus_scan(self) -> list[int]:
+        """
+        Scan I2C bus for responding devices.
+
+        Returns list of 7-bit slave addresses that ACK'd.
+        The firmware returns a 16-byte bitmap (128 bits for addresses 0-127).
+        """
+        data = self._vendor_in(CMD_I2C_BUS_SCAN, length=16)
+        addresses = []
+        for byte_idx in range(16):
+            for bit_idx in range(8):
+                if data[byte_idx] & (1 << bit_idx):
+                    addresses.append(byte_idx * 8 + bit_idx)
+        return addresses
+
+    def i2c_raw_read(self, slave: int, reg: int) -> int:
+        """Read a single register from an I2C device."""
+        data = self._vendor_in(CMD_I2C_RAW_READ, value=slave,
+                               index=reg, length=1)
+        return data[0]
+
     # -- High-level sweep helpers --
 
     def sweep_spectrum(self, start_mhz: float, stop_mhz: float,

tui/src/skywalker_tui/app.py

@@ -1,9 +1,9 @@
 """SkyWalker-1 TUI — main application.
 
-Provides mode switching between 5 RF operating modes via a sidebar and F-key
-shortcuts. Each mode is a Screen subclass that manages its own workers.
+Provides mode switching between 8 operating modes via a sidebar and F-key
+shortcuts. Each mode is a Container subclass that manages its own workers.
 
-Note: We use "rf_mode" terminology for our 5 operating modes to avoid colliding
+Note: We use "rf_mode" terminology for our operating modes to avoid colliding
 with Textual's built-in App.mode / _current_mode / _screen_stacks system.
 """
 
@@ -24,6 +24,9 @@ from skywalker_tui.screens.scan import ScanScreen
 from skywalker_tui.screens.monitor import MonitorScreen
 from skywalker_tui.screens.lband import LBandScreen
 from skywalker_tui.screens.track import TrackScreen
+from skywalker_tui.screens.device import DeviceScreen
+from skywalker_tui.screens.stream import StreamScreen
+from skywalker_tui.screens.config import ConfigScreen
 
 
 MODES = {
@@ -32,6 +35,9 @@ MODES = {
     "monitor": ("F3 Monitor", MonitorScreen),
     "lband": ("F4 L-Band", LBandScreen),
     "track": ("F5 Track", TrackScreen),
+    "device": ("F6 Device", DeviceScreen),
+    "stream": ("F7 Stream", StreamScreen),
+    "config": ("F8 Config", ConfigScreen),
 }
 
 
@@ -48,6 +54,9 @@ class SkyWalkerApp(App):
         Binding("f3", "rf_mode('monitor')", "Monitor", show=True),
         Binding("f4", "rf_mode('lband')", "L-Band", show=True),
         Binding("f5", "rf_mode('track')", "Track", show=True),
+        Binding("f6", "rf_mode('device')", "Device", show=True),
+        Binding("f7", "rf_mode('stream')", "Stream", show=True),
+        Binding("f8", "rf_mode('config')", "Config", show=True),
         Binding("q", "quit", "Quit", show=True),
         Binding("d", "toggle_dark", "Theme", show=True),
         Binding("ctrl+w", "starwars", "Star Wars", show=False),
@@ -100,7 +109,7 @@ class SkyWalkerApp(App):
         self.call_later(self._init_mode_screens)
 
     def _init_mode_screens(self) -> None:
-        """Mount all 5 mode screens into the content switcher."""
+        """Mount all 8 mode screens into the content switcher."""
         switcher = self.query_one("#content-area", ContentSwitcher)
         for mode_key, (_label, cls) in MODES.items():
             screen = cls(self._bridge, id=f"screen-{mode_key}")

tui/src/skywalker_tui/bridge.py

@@ -17,7 +17,7 @@ class USBBridge:
 
     def __init__(self, device):
         self._dev = device
-        self._lock = threading.Lock()
+        self._lock = threading.RLock()
 
     @property
     def is_demo(self) -> bool:
@@ -92,3 +92,111 @@ class USBBridge:
             if hasattr(self._dev, "blind_scan"):
                 return self._dev.blind_scan(freq_khz, sr_min, sr_max, sr_step)
             return None
+
+    # -- Device info (extended) --
+
+    def get_serial_number(self) -> bytes:
+        with self._lock:
+            return self._dev.get_serial_number()
+
+    def get_usb_speed(self) -> int:
+        with self._lock:
+            return self._dev.get_usb_speed()
+
+    def get_vendor_string(self) -> str:
+        with self._lock:
+            return self._dev.get_vendor_string()
+
+    def get_product_string(self) -> str:
+        with self._lock:
+            return self._dev.get_product_string()
+
+    # -- FX2 RAM --
+
+    def fx2_ram_read(self, addr: int, length: int) -> bytes:
+        with self._lock:
+            return self._dev.fx2_ram_read(addr, length)
+
+    def fx2_ram_write(self, addr: int, data: bytes) -> int:
+        with self._lock:
+            return self._dev.fx2_ram_write(addr, data)
+
+    def fx2_cpu_halt(self) -> None:
+        with self._lock:
+            self._dev.fx2_cpu_halt()
+
+    def fx2_cpu_start(self) -> None:
+        with self._lock:
+            self._dev.fx2_cpu_start()
+
+    # -- EEPROM --
+
+    def eeprom_read(self, offset: int, length: int = 64) -> bytes:
+        with self._lock:
+            return self._dev.eeprom_read(offset, length)
+
+    def eeprom_write_page(self, offset: int, data: bytes) -> int:
+        with self._lock:
+            return self._dev.eeprom_write_page(offset, data)
+
+    def eeprom_read_all(self, size: int = 16384) -> bytes:
+        with self._lock:
+            return self._dev.eeprom_read_all(size)
+
+    # -- Diagnostics --
+
+    def boot_debug(self, mode: int) -> dict:
+        with self._lock:
+            return self._dev.boot_debug(mode)
+
+    def i2c_bus_scan(self) -> list[int]:
+        with self._lock:
+            return self._dev.i2c_bus_scan()
+
+    def i2c_raw_read(self, slave: int, reg: int) -> int:
+        with self._lock:
+            return self._dev.i2c_raw_read(slave, reg)
+
+    # -- Streaming --
+
+    def arm_transfer(self, on: bool) -> None:
+        with self._lock:
+            self._dev.arm_transfer(on)
+
+    def read_stream(self, size: int = 8192, timeout: int = 1000) -> bytes:
+        with self._lock:
+            return self._dev.read_stream(size, timeout)
+
+    # -- Config --
+
+    def send_diseqc_message(self, msg: bytes) -> None:
+        with self._lock:
+            self._dev.send_diseqc_message(msg)
+
+    def send_diseqc_tone_burst(self, mini_cmd: int) -> None:
+        with self._lock:
+            self._dev.send_diseqc_tone_burst(mini_cmd)
+
+    def start_intersil(self, on: bool = True) -> int:
+        with self._lock:
+            return self._dev.start_intersil(on)
+
+    def set_extra_voltage(self, on: bool) -> None:
+        with self._lock:
+            self._dev.set_extra_voltage(on)
+
+    def boot(self, on: bool = True) -> int:
+        with self._lock:
+            return self._dev.boot(on)
+
+    def get_signal_lock(self) -> bool:
+        with self._lock:
+            return self._dev.get_signal_lock()
+
+    def get_signal_strength(self) -> dict:
+        with self._lock:
+            return self._dev.get_signal_strength()
+
+    def multi_reg_read(self, start_reg: int, count: int) -> bytes:
+        with self._lock:
+            return self._dev.multi_reg_read(start_reg, count)

tui/src/skywalker_tui/demo.py

@@ -13,6 +13,7 @@ This enables full TUI development and testing without hardware.
 
 import math
 import random
+import struct
 import time
 
 
@@ -28,6 +29,31 @@ _TRANSPONDERS = [
 _NOISE_FLOOR = -35.0
 _LOCK_THRESHOLD_DB = 3.5
 
+# Simulated PIDs for synthetic TS packets
+_DEMO_PIDS = [0x0000, 0x0100, 0x0101, 0x0102, 0x1FFF]
+_DEMO_PID_WEIGHTS = [1, 5, 40, 20, 34]  # rough % distribution
+
+
+def _build_demo_eeprom() -> bytearray:
+    """Build a valid C2 boot EEPROM image for demo mode."""
+    img = bytearray()
+    # C2 header: magic, VID_L, VID_H, PID_L, PID_H, DID_L, DID_H, CONFIG
+    img.append(0xC2)
+    img.extend(struct.pack('<HHH', 0x09C0, 0x0203, 0x0001))
+    img.append(0x44)  # config byte: 400kHz I2C + disconnect
+
+    # One code segment: 512 bytes loaded to address 0x0000
+    code_len = 512
+    img.extend(struct.pack('>HH', code_len, 0x0000))
+    img.extend(bytes(range(256)) * 2)  # repeating pattern
+
+    # END marker: 0x8001 + entry point 0x0000
+    img.extend(struct.pack('>HH', 0x8001, 0x0000))
+
+    # Pad to 16KB with 0xFF (like a real blank EEPROM region)
+    img.extend(b'\xFF' * (16384 - len(img)))
+    return img
+
 
 class DemoDevice:
     """Drop-in replacement for SkyWalker1 that generates synthetic data."""
@@ -39,10 +65,14 @@ class DemoDevice:
         self._lnb_on = False
         self._lnb_voltage_high = False
         self._tone_22khz = False
+        self._extra_voltage = False
         self._tuned_freq_khz = 0
         self._tuned_sr_sps = 0
+        self._armed = False
         self._start_time = time.monotonic()
         self._sample_count = 0
+        self._eeprom = _build_demo_eeprom()
+        self._cc_counters: dict[int, int] = {pid: 0 for pid in _DEMO_PIDS}
 
     def open(self):
         pass
@@ -109,6 +139,9 @@ class DemoDevice:
     def start_intersil(self, on: bool = True):
         self._lnb_on = on
 
+    def set_extra_voltage(self, on: bool):
+        self._extra_voltage = on
+
     def tune(self, symbol_rate_sps: int, freq_khz: int,
              mod_index: int, fec_index: int):
         self._tuned_freq_khz = freq_khz
@@ -211,6 +244,196 @@ class DemoDevice:
                     }
         return None
 
+    # --- Device info (extended) ---
+
+    def get_serial_number(self) -> bytes:
+        time.sleep(0.005)
+        return b'DEMO0001'
+
+    def get_usb_speed(self) -> int:
+        time.sleep(0.002)
+        return 2  # High speed
+
+    def get_vendor_string(self) -> str:
+        time.sleep(0.005)
+        return "Genpix Electronics"
+
+    def get_product_string(self) -> str:
+        time.sleep(0.005)
+        return "SkyWalker-1 DVB-S"
+
+    # --- FX2 RAM access ---
+
+    def fx2_ram_read(self, addr: int, length: int) -> bytes:
+        time.sleep(0.003)
+        # Return pseudo-random but deterministic bytes based on address
+        rng = random.Random(addr)
+        return bytes(rng.randint(0, 255) for _ in range(length))
+
+    def fx2_ram_write(self, addr: int, data: bytes) -> int:
+        time.sleep(0.003)
+        return len(data)
+
+    def fx2_cpu_halt(self) -> None:
+        time.sleep(0.005)
+
+    def fx2_cpu_start(self) -> None:
+        time.sleep(0.005)
+
+    # --- EEPROM access ---
+
+    def eeprom_read(self, offset: int, length: int = 64) -> bytes:
+        time.sleep(0.005)
+        end = min(offset + length, len(self._eeprom))
+        return bytes(self._eeprom[offset:end])
+
+    def eeprom_write_page(self, offset: int, data: bytes) -> int:
+        time.sleep(0.012)  # simulated write cycle
+        for i, b in enumerate(data):
+            if offset + i < len(self._eeprom):
+                self._eeprom[offset + i] = b
+        return len(data)
+
+    def eeprom_read_all(self, size: int = 16384) -> bytes:
+        chunk_size = 64
+        result = bytearray()
+        for offset in range(0, size, chunk_size):
+            remaining = min(chunk_size, size - offset)
+            result.extend(self.eeprom_read(offset, remaining))
+        return bytes(result)
+
+    # --- Diagnostics ---
+
+    _BOOT_STAGES = {
+        0x80: {"stage": 0x00, "result": 0x00, "detail": 0x00},  # no-op
+        0x81: {"stage": 0x01, "result": 0x01, "detail": 0x00},  # GPIO OK
+        0x82: {"stage": 0x02, "result": 0x01, "detail": 0x02},  # I2C probe OK
+        0x83: {"stage": 0x03, "result": 0x01, "detail": 0x00},  # BCM4500 reset OK
+        0x84: {"stage": 0x04, "result": 0x01, "detail": 0x00},  # FW load OK
+        0x85: {"stage": 0x05, "result": 0x01, "detail": 0x00},  # full boot OK
+    }
+
+    def boot_debug(self, mode: int) -> dict:
+        time.sleep(0.05)
+        return dict(self._BOOT_STAGES.get(mode, {
+            "stage": mode & 0x0F, "result": 0x00, "detail": 0xFF,
+        }))
+
+    def i2c_bus_scan(self) -> list[int]:
+        time.sleep(0.1)
+        return [0x08, 0x51]  # BCM4500 at 0x08, EEPROM at 0x51
+
+    def i2c_raw_read(self, slave: int, reg: int) -> int:
+        time.sleep(0.01)
+        return random.randint(0, 255)
+
+    # --- Streaming ---
+
+    def arm_transfer(self, on: bool) -> None:
+        self._armed = on
+        time.sleep(0.01)
+
+    def read_stream(self, size: int = 8192, timeout: int = 1000) -> bytes:
+        """Generate synthetic TS packets with proper structure."""
+        if not self._armed:
+            return b''
+        time.sleep(0.02)
+
+        packets = bytearray()
+        num_packets = size // 188
+
+        for _ in range(num_packets):
+            # Pick a PID based on weights
+            pid = random.choices(_DEMO_PIDS, weights=_DEMO_PID_WEIGHTS, k=1)[0]
+            cc = self._cc_counters[pid]
+            self._cc_counters[pid] = (cc + 1) & 0x0F
+
+            # Occasionally inject a CC error (~0.1%)
+            if random.random() < 0.001 and pid != 0x1FFF:
+                self._cc_counters[pid] = (self._cc_counters[pid] + 1) & 0x0F
+
+            # Build 188-byte TS packet
+            pkt = bytearray(188)
+            pkt[0] = 0x47  # sync byte
+            pkt[1] = (pid >> 8) & 0x1F
+            pkt[2] = pid & 0xFF
+            pkt[3] = 0x10 | (cc & 0x0F)  # payload only + CC
+
+            if pid == 0x0000:
+                # PAT packet with PUSI
+                pkt[1] |= 0x40  # PUSI
+                pkt[4] = 0x00   # pointer field
+                # PAT section: table_id=0x00, one program
+                pat = bytearray([
+                    0x00,        # table_id
+                    0xB0, 0x0D,  # section_syntax + length=13
+                    0x00, 0x01,  # transport_stream_id
+                    0xC1,        # version=0, current
+                    0x00, 0x00,  # section_number, last_section
+                    0x00, 0x01,  # program_number=1
+                    0xE1, 0x00,  # PMT PID=0x0100
+                    # CRC32 placeholder
+                    0x00, 0x00, 0x00, 0x00,
+                ])
+                pkt[5:5 + len(pat)] = pat
+
+            elif pid == 0x0100:
+                # PMT packet with PUSI
+                pkt[1] |= 0x40
+                pkt[4] = 0x00
+                pmt = bytearray([
+                    0x02,        # table_id
+                    0xB0, 0x17,  # section_syntax + length=23
+                    0x00, 0x01,  # program_number=1
+                    0xC1,        # version=0
+                    0x00, 0x00,  # section_number
+                    0xE1, 0x01,  # PCR PID=0x0101
+                    0xF0, 0x00,  # program info length=0
+                    # Stream 1: MPEG-2 Video on PID 0x0101
+                    0x02, 0xE1, 0x01, 0xF0, 0x00,
+                    # Stream 2: MPEG-1 Audio on PID 0x0102
+                    0x03, 0xE1, 0x02, 0xF0, 0x00,
+                    # CRC32 placeholder
+                    0x00, 0x00, 0x00, 0x00,
+                ])
+                pkt[5:5 + len(pmt)] = pmt
+
+            else:
+                # Fill payload with pseudo-random data
+                for i in range(4, 188):
+                    pkt[i] = random.randint(0, 255)
+                pkt[3] = 0x10 | (cc & 0x0F)
+
+            packets.extend(pkt)
+
+        return bytes(packets)
+
+    # --- DiSEqC ---
+
+    def send_diseqc_tone_burst(self, mini_cmd: int) -> None:
+        time.sleep(0.05)
+
+    def send_diseqc_message(self, msg: bytes) -> None:
+        time.sleep(0.05)
+
+    def get_signal_lock(self) -> bool:
+        sig = self.signal_monitor()
+        return sig["locked"]
+
+    def get_signal_strength(self) -> dict:
+        sig = self.signal_monitor()
+        return {
+            "snr_raw": sig["snr_raw"],
+            "snr_db": sig["snr_db"],
+            "snr_pct": sig["snr_pct"],
+            "raw_bytes": "00 00 00 00 00 00",
+        }
+
+    def multi_reg_read(self, start_reg: int, count: int) -> bytes:
+        time.sleep(0.01)
+        rng = random.Random(start_reg)
+        return bytes(rng.randint(0, 255) for _ in range(count))
+
     # --- Internal signal model ---
 
     def _power_at(self, freq_mhz: float, elapsed: float) -> float:

tui/src/skywalker_tui/screens/config.py

@@ -0,0 +1,742 @@
+"""Config screen — LNB power, DiSEqC switching, and modulation/FEC setup.
+
+Manages the hardware configuration layer: LNB voltage/tone control, DiSEqC
+port switching (committed commands, tone burst, raw hex), and the tuning
+parameter set (modulation, FEC, symbol rate, frequency). Bottom status bar
+shows live config register state from the device.
+"""
+
+from textual.app import ComposeResult
+from textual.containers import Container, Horizontal, Vertical
+from textual.widgets import Label, Input, Button, Static, Select
+from textual import work
+from textual.worker import Worker
+
+from skywalker_lib import MODULATIONS, FEC_RATES, MOD_FEC_GROUP, format_config_bits
+
+
+def _fec_options_for_mod(mod_key: str) -> list[tuple[str, str]]:
+    """Return (label, value) tuples for the FEC Select dropdown."""
+    group = MOD_FEC_GROUP.get(mod_key, "dvbs")
+    rates = FEC_RATES.get(group, {})
+    return [(rate_name, rate_name) for rate_name in rates]
+
+
+def _mod_options() -> list[tuple[str, str]]:
+    """Return (label, value) tuples for the Modulation Select dropdown."""
+    return [(desc, key) for key, (_idx, desc) in MODULATIONS.items()]
+
+
+class ConfigScreen(Container):
+    """LNB, DiSEqC, and modulation/FEC configuration panel."""
+
+    DEFAULT_CSS = """
+    ConfigScreen {
+        layout: vertical;
+    }
+    ConfigScreen #cfg-main {
+        height: 1fr;
+        layout: horizontal;
+        padding: 1 2;
+    }
+
+    /* --- Three column panels --- */
+
+    ConfigScreen .cfg-panel {
+        width: 1fr;
+        background: #0e1420;
+        border: round #1a2a3a;
+        padding: 1 2;
+        margin: 0 1 0 0;
+        layout: vertical;
+    }
+    ConfigScreen .cfg-panel:last-of-type {
+        margin: 0;
+    }
+    ConfigScreen .cfg-panel-title {
+        color: #00d4aa;
+        text-style: bold;
+        margin: 0 0 1 0;
+        height: 1;
+    }
+
+    /* --- Buttons within panels --- */
+
+    ConfigScreen .cfg-btn-row {
+        height: auto;
+        layout: horizontal;
+        margin: 0 0 1 0;
+    }
+    ConfigScreen .cfg-btn-row Label {
+        width: auto;
+        margin: 1 1 0 0;
+        color: #506878;
+        min-width: 12;
+    }
+    ConfigScreen .cfg-btn-row Button {
+        margin: 0 1 0 0;
+        background: #1a2a40;
+        color: #c8d0d8;
+        border: round #1a3050;
+    }
+    ConfigScreen .cfg-btn-row Button:hover {
+        background: #00d4aa;
+        color: #0a0a12;
+    }
+    ConfigScreen .cfg-btn-row Button.-active-setting {
+        background: #0a3a3a;
+        color: #00d4aa;
+        border: round #00d4aa;
+        text-style: bold;
+    }
+
+    /* --- Warning label --- */
+
+    ConfigScreen .cfg-warning {
+        color: #e8a020;
+        margin: 1 0 0 0;
+        text-style: italic;
+        height: auto;
+    }
+
+    /* --- DiSEqC port buttons --- */
+
+    ConfigScreen #cfg-diseqc-ports {
+        height: auto;
+        layout: horizontal;
+        margin: 0 0 1 0;
+    }
+    ConfigScreen #cfg-diseqc-ports Button {
+        margin: 0 1 0 0;
+        min-width: 10;
+        background: #1a2a40;
+        color: #c8d0d8;
+        border: round #1a3050;
+    }
+    ConfigScreen #cfg-diseqc-ports Button:hover {
+        background: #00d4aa;
+        color: #0a0a12;
+    }
+    ConfigScreen #cfg-diseqc-ports Button.-active-setting {
+        background: #0a3a3a;
+        color: #00d4aa;
+        border: round #00d4aa;
+        text-style: bold;
+    }
+
+    /* --- Raw DiSEqC input row --- */
+
+    ConfigScreen #cfg-diseqc-raw {
+        height: auto;
+        layout: horizontal;
+        margin: 1 0 0 0;
+    }
+    ConfigScreen #cfg-diseqc-raw Label {
+        width: auto;
+        margin: 1 1 0 0;
+        color: #506878;
+    }
+    ConfigScreen #cfg-diseqc-raw Input {
+        width: 1fr;
+        margin: 0 1 0 0;
+        background: #121c2a;
+        border: round #1a3050;
+        color: #c8d0d8;
+    }
+    ConfigScreen #cfg-diseqc-raw Input:focus {
+        border: round #00d4aa;
+    }
+    ConfigScreen #cfg-diseqc-raw Button {
+        margin: 0;
+        background: #1a2a40;
+        color: #c8d0d8;
+        border: round #1a3050;
+    }
+
+    /* --- Modulation/FEC panel --- */
+
+    ConfigScreen .cfg-field-row {
+        height: auto;
+        layout: horizontal;
+        margin: 0 0 1 0;
+    }
+    ConfigScreen .cfg-field-row Label {
+        width: auto;
+        min-width: 12;
+        margin: 1 1 0 0;
+        color: #506878;
+    }
+    ConfigScreen .cfg-field-row Select {
+        width: 1fr;
+    }
+    ConfigScreen .cfg-field-row Input {
+        width: 1fr;
+        background: #121c2a;
+        border: round #1a3050;
+        color: #c8d0d8;
+    }
+    ConfigScreen .cfg-field-row Input:focus {
+        border: round #00d4aa;
+    }
+    ConfigScreen #cfg-tune-btn {
+        margin: 1 0 0 0;
+        width: 100%;
+    }
+
+    /* --- Bottom status bar --- */
+
+    ConfigScreen #cfg-status-bar {
+        height: auto;
+        min-height: 3;
+        padding: 1 2;
+        background: #0e1018;
+        border-top: solid #1a2a3a;
+    }
+    ConfigScreen #cfg-result {
+        height: auto;
+        min-height: 2;
+        padding: 0 2;
+        background: #0e1018;
+    }
+    """
+
+    def __init__(self, bridge, **kwargs):
+        super().__init__(**kwargs)
+        self._bridge = bridge
+        self._refresh_worker: Worker | None = None
+        self._active_port: int | None = None
+        self._lnb_power = False
+        self._lnb_voltage_high = False
+        self._tone_22khz = False
+        self._extra_volt = False
+
+    def compose(self) -> ComposeResult:
+        with Horizontal(id="cfg-main"):
+            # --- LNB Control ---
+            with Vertical(classes="cfg-panel"):
+                yield Static("[#00d4aa bold]LNB Control[/]", classes="cfg-panel-title")
+
+                with Horizontal(classes="cfg-btn-row"):
+                    yield Label("Power:")
+                    yield Button("On", id="cfg-lnb-on", variant="success")
+                    yield Button("Off", id="cfg-lnb-off", variant="error")
+
+                with Horizontal(classes="cfg-btn-row"):
+                    yield Label("Voltage:")
+                    yield Button("13V", id="cfg-volt-13")
+                    yield Button("18V", id="cfg-volt-18")
+
+                with Horizontal(classes="cfg-btn-row"):
+                    yield Label("22kHz Tone:")
+                    yield Button("On", id="cfg-tone-on")
+                    yield Button("Off", id="cfg-tone-off")
+
+                with Horizontal(classes="cfg-btn-row"):
+                    yield Label("Extra +1V:")
+                    yield Button("On", id="cfg-extra-on")
+                    yield Button("Off", id="cfg-extra-off")
+
+                yield Static(
+                    "[#e8a020]Max 450mA continuous load[/]",
+                    classes="cfg-warning",
+                )
+
+            # --- DiSEqC Switch ---
+            with Vertical(classes="cfg-panel"):
+                yield Static("[#00d4aa bold]DiSEqC Switch[/]", classes="cfg-panel-title")
+
+                yield Label("Committed Port:", classes="cfg-section-label")
+                with Horizontal(id="cfg-diseqc-ports"):
+                    yield Button("Port 1", id="cfg-port-1")
+                    yield Button("Port 2", id="cfg-port-2")
+                    yield Button("Port 3", id="cfg-port-3")
+                    yield Button("Port 4", id="cfg-port-4")
+
+                with Horizontal(classes="cfg-btn-row"):
+                    yield Label("Tone Burst:")
+                    yield Button("A", id="cfg-burst-a")
+                    yield Button("B", id="cfg-burst-b")
+
+                with Horizontal(id="cfg-diseqc-raw"):
+                    yield Label("Raw Hex:")
+                    yield Input(
+                        placeholder="E0 10 38 F0",
+                        id="cfg-diseqc-hex",
+                    )
+                    yield Button("Send", id="cfg-diseqc-send")
+
+            # --- Modulation / FEC ---
+            with Vertical(classes="cfg-panel"):
+                yield Static(
+                    "[#00d4aa bold]Modulation / FEC[/]",
+                    classes="cfg-panel-title",
+                )
+
+                with Horizontal(classes="cfg-field-row"):
+                    yield Label("Modulation:")
+                    yield Select(
+                        _mod_options(),
+                        value="qpsk",
+                        id="cfg-mod-select",
+                        allow_blank=False,
+                    )
+
+                with Horizontal(classes="cfg-field-row"):
+                    yield Label("FEC Rate:")
+                    yield Select(
+                        _fec_options_for_mod("qpsk"),
+                        value="auto",
+                        id="cfg-fec-select",
+                        allow_blank=False,
+                    )
+
+                with Horizontal(classes="cfg-field-row"):
+                    yield Label("Symbol Rate:")
+                    yield Input("20000", id="cfg-sr-input")
+                    yield Label("ksps")
+
+                with Horizontal(classes="cfg-field-row"):
+                    yield Label("Frequency:")
+                    yield Input("1200", id="cfg-freq-input")
+                    yield Label("MHz")
+
+                yield Button(
+                    "Tune",
+                    id="cfg-tune-btn",
+                    variant="success",
+                )
+
+        yield Static("", id="cfg-result")
+        yield Static("[#506878]Config: reading...[/]", id="cfg-status-bar")
+
+    # ── Lifecycle ──
+
+    def on_show(self) -> None:
+        self._refresh_config()
+
+    def on_hide(self) -> None:
+        if self._refresh_worker is not None:
+            self._refresh_worker.cancel()
+            self._refresh_worker = None
+
+    # ── Event handlers ──
+
+    def on_button_pressed(self, event: Button.Pressed) -> None:
+        btn = event.button.id
+        if btn is None:
+            return
+
+        # LNB control
+        if btn == "cfg-lnb-on":
+            self._do_lnb_power(True)
+        elif btn == "cfg-lnb-off":
+            self._do_lnb_power(False)
+        elif btn == "cfg-volt-13":
+            self._do_lnb_voltage(high=False)
+        elif btn == "cfg-volt-18":
+            self._do_lnb_voltage(high=True)
+        elif btn == "cfg-tone-on":
+            self._do_22khz_tone(on=True)
+        elif btn == "cfg-tone-off":
+            self._do_22khz_tone(on=False)
+        elif btn == "cfg-extra-on":
+            self._do_extra_voltage(on=True)
+        elif btn == "cfg-extra-off":
+            self._do_extra_voltage(on=False)
+
+        # DiSEqC ports
+        elif btn == "cfg-port-1":
+            self._do_diseqc_port(1)
+        elif btn == "cfg-port-2":
+            self._do_diseqc_port(2)
+        elif btn == "cfg-port-3":
+            self._do_diseqc_port(3)
+        elif btn == "cfg-port-4":
+            self._do_diseqc_port(4)
+
+        # Tone burst
+        elif btn == "cfg-burst-a":
+            self._do_tone_burst(0)
+        elif btn == "cfg-burst-b":
+            self._do_tone_burst(1)
+
+        # Raw DiSEqC
+        elif btn == "cfg-diseqc-send":
+            self._do_diseqc_raw()
+
+        # Tune
+        elif btn == "cfg-tune-btn":
+            self._do_tune()
+
+    def on_select_changed(self, event: Select.Changed) -> None:
+        if event.select.id == "cfg-mod-select":
+            mod_key = str(event.value)
+            self._update_fec_options(mod_key)
+
+    # ── LNB operations ──
+
+    @work(thread=True)
+    def _do_lnb_power(self, on: bool) -> None:
+        try:
+            self._bridge.start_intersil(on)
+            self._lnb_power = on
+            label = "[#00d4aa]ON[/]" if on else "[#e04040]OFF[/]"
+            self.app.call_from_thread(
+                self._show_result,
+                f"[#c8d0d8]LNB power:[/] {label}",
+            )
+            self.app.call_from_thread(self._highlight_lnb_power, on)
+        except Exception as e:
+            self.app.call_from_thread(
+                self._show_result,
+                f"[#e04040]LNB power error: {e}[/]",
+            )
+        self.app.call_from_thread(self._refresh_config)
+
+    @work(thread=True)
+    def _do_lnb_voltage(self, high: bool) -> None:
+        try:
+            self._bridge.set_lnb_voltage(high)
+            self._lnb_voltage_high = high
+            volts = "18V" if high else "13V"
+            self.app.call_from_thread(
+                self._show_result,
+                f"[#c8d0d8]LNB voltage set to[/] [#00d4aa]{volts}[/]",
+            )
+            self.app.call_from_thread(self._highlight_voltage, high)
+        except Exception as e:
+            self.app.call_from_thread(
+                self._show_result,
+                f"[#e04040]Voltage error: {e}[/]",
+            )
+        self.app.call_from_thread(self._refresh_config)
+
+    @work(thread=True)
+    def _do_22khz_tone(self, on: bool) -> None:
+        try:
+            self._bridge.set_22khz_tone(on)
+            self._tone_22khz = on
+            label = "[#00d4aa]ON[/]" if on else "[#e04040]OFF[/]"
+            self.app.call_from_thread(
+                self._show_result,
+                f"[#c8d0d8]22kHz tone:[/] {label}",
+            )
+            self.app.call_from_thread(self._highlight_tone, on)
+        except Exception as e:
+            self.app.call_from_thread(
+                self._show_result,
+                f"[#e04040]22kHz tone error: {e}[/]",
+            )
+        self.app.call_from_thread(self._refresh_config)
+
+    @work(thread=True)
+    def _do_extra_voltage(self, on: bool) -> None:
+        try:
+            self._bridge.set_extra_voltage(on)
+            self._extra_volt = on
+            label = "[#00d4aa]ON[/]" if on else "[#e04040]OFF[/]"
+            self.app.call_from_thread(
+                self._show_result,
+                f"[#c8d0d8]Extra +1V:[/] {label}",
+            )
+            self.app.call_from_thread(self._highlight_extra, on)
+        except Exception as e:
+            self.app.call_from_thread(
+                self._show_result,
+                f"[#e04040]Extra voltage error: {e}[/]",
+            )
+        self.app.call_from_thread(self._refresh_config)
+
+    # ── DiSEqC operations ──
+
+    _DISEQC_PORT_CMDS = {
+        1: bytes([0xE0, 0x10, 0x38, 0xF0]),
+        2: bytes([0xE0, 0x10, 0x38, 0xF4]),
+        3: bytes([0xE0, 0x10, 0x38, 0xF8]),
+        4: bytes([0xE0, 0x10, 0x38, 0xFC]),
+    }
+
+    @work(thread=True)
+    def _do_diseqc_port(self, port: int) -> None:
+        cmd = self._DISEQC_PORT_CMDS[port]
+        try:
+            self._bridge.send_diseqc_message(cmd)
+            self._active_port = port
+            self.app.call_from_thread(
+                self._show_result,
+                f"[#c8d0d8]DiSEqC port[/] [#00d4aa]{port}[/]"
+                f" [#506878]({cmd.hex(' ')})[/]",
+            )
+            self.app.call_from_thread(self._highlight_port, port)
+        except Exception as e:
+            self.app.call_from_thread(
+                self._show_result,
+                f"[#e04040]DiSEqC port {port} error: {e}[/]",
+            )
+
+    @work(thread=True)
+    def _do_tone_burst(self, mini_cmd: int) -> None:
+        label = "A" if mini_cmd == 0 else "B"
+        try:
+            self._bridge.send_diseqc_tone_burst(mini_cmd)
+            self.app.call_from_thread(
+                self._show_result,
+                f"[#c8d0d8]Tone burst[/] [#00d4aa]{label}[/]",
+            )
+        except Exception as e:
+            self.app.call_from_thread(
+                self._show_result,
+                f"[#e04040]Tone burst error: {e}[/]",
+            )
+
+    @work(thread=True)
+    def _do_diseqc_raw(self) -> None:
+        try:
+            hex_input = self.app.call_from_thread(self._get_diseqc_hex)
+        except Exception:
+            return
+
+        if not hex_input:
+            self.app.call_from_thread(
+                self._show_result,
+                "[#e8a020]Enter hex bytes (e.g. E0 10 38 F0)[/]",
+            )
+            return
+
+        try:
+            raw = bytes.fromhex(hex_input.replace(",", " "))
+        except ValueError:
+            self.app.call_from_thread(
+                self._show_result,
+                f"[#e04040]Invalid hex: {hex_input}[/]",
+            )
+            return
+
+        if len(raw) < 3 or len(raw) > 6:
+            self.app.call_from_thread(
+                self._show_result,
+                f"[#e04040]DiSEqC message must be 3-6 bytes, got {len(raw)}[/]",
+            )
+            return
+
+        try:
+            self._bridge.send_diseqc_message(raw)
+            self.app.call_from_thread(
+                self._show_result,
+                f"[#c8d0d8]DiSEqC sent:[/] [#00d4aa]{raw.hex(' ')}[/]",
+            )
+        except Exception as e:
+            self.app.call_from_thread(
+                self._show_result,
+                f"[#e04040]DiSEqC send error: {e}[/]",
+            )
+
+    def _get_diseqc_hex(self) -> str:
+        """Read the raw hex input value (must be called from UI thread)."""
+        return self.query_one("#cfg-diseqc-hex", Input).value.strip()
+
+    # ── Tune operation ──
+
+    @work(thread=True)
+    def _do_tune(self) -> None:
+        # Read inputs from UI thread
+        try:
+            params = self.app.call_from_thread(self._read_tune_params)
+        except Exception:
+            return
+
+        if params is None:
+            return
+
+        mod_key, fec_key, sr_ksps, freq_mhz = params
+
+        # Validate
+        if not (256 <= sr_ksps <= 30000):
+            self.app.call_from_thread(
+                self._show_result,
+                "[#e04040]Symbol rate out of range (256-30000 ksps)[/]",
+            )
+            return
+
+        if not (950 <= freq_mhz <= 2150):
+            self.app.call_from_thread(
+                self._show_result,
+                "[#e04040]Frequency out of range (950-2150 MHz)[/]",
+            )
+            return
+
+        mod_index = MODULATIONS[mod_key][0]
+        fec_group = MOD_FEC_GROUP.get(mod_key, "dvbs")
+        fec_rates = FEC_RATES.get(fec_group, {})
+        fec_index = fec_rates.get(fec_key, 0)
+
+        sr_sps = sr_ksps * 1000
+        freq_khz = int(freq_mhz * 1000)
+
+        try:
+            self._bridge.ensure_booted()
+            self._bridge.tune(sr_sps, freq_khz, mod_index, fec_index)
+            mod_desc = MODULATIONS[mod_key][1]
+            self.app.call_from_thread(
+                self._show_result,
+                f"[#00d4aa]Tuned:[/] [#c8d0d8]{freq_mhz:.1f} MHz  "
+                f"{sr_ksps} ksps  {mod_desc}  FEC {fec_key}[/]",
+            )
+        except Exception as e:
+            self.app.call_from_thread(
+                self._show_result,
+                f"[#e04040]Tune error: {e}[/]",
+            )
+        self.app.call_from_thread(self._refresh_config)
+
+    def _read_tune_params(self) -> tuple | None:
+        """Read tune parameters from UI widgets (must be called from UI thread)."""
+        mod_select = self.query_one("#cfg-mod-select", Select)
+        fec_select = self.query_one("#cfg-fec-select", Select)
+        sr_input = self.query_one("#cfg-sr-input", Input)
+        freq_input = self.query_one("#cfg-freq-input", Input)
+
+        mod_key = str(mod_select.value) if mod_select.value is not None else "qpsk"
+        fec_key = str(fec_select.value) if fec_select.value is not None else "auto"
+
+        try:
+            sr_ksps = int(float(sr_input.value or "20000"))
+        except ValueError:
+            self._show_result("[#e04040]Invalid symbol rate[/]")
+            return None
+
+        try:
+            freq_mhz = float(freq_input.value or "1200")
+        except ValueError:
+            self._show_result("[#e04040]Invalid frequency[/]")
+            return None
+
+        return (mod_key, fec_key, sr_ksps, freq_mhz)
+
+    # ── FEC dropdown update ──
+
+    def _update_fec_options(self, mod_key: str) -> None:
+        """Rebuild the FEC dropdown when modulation changes."""
+        fec_select = self.query_one("#cfg-fec-select", Select)
+        options = _fec_options_for_mod(mod_key)
+        fec_select.set_options(options)
+        # Default to "auto" if available, otherwise first option
+        auto_keys = [v for (_l, v) in options if v == "auto"]
+        if auto_keys:
+            fec_select.value = "auto"
+        elif options:
+            fec_select.value = options[0][1]
+
+    # ── Config status display ──
+
+    @work(thread=True)
+    def _refresh_config(self) -> None:
+        """Read config register and update the status bar."""
+        try:
+            status = self._bridge.get_config()
+            bits = format_config_bits(status)
+            self.app.call_from_thread(self._display_config, status, bits)
+        except Exception as e:
+            self.app.call_from_thread(
+                self._display_config_error, str(e),
+            )
+
+    def _display_config(self, status: int, bits: list) -> None:
+        """Render config bits in the status bar (UI thread)."""
+        if not self.is_mounted:
+            return
+
+        parts = []
+        for name, is_set in bits:
+            if is_set:
+                parts.append(f"[#00d4aa]{name}[/]")
+            else:
+                parts.append(f"[#303840]{name}[/]")
+
+        text = (
+            f"[#506878]Config 0x{status:02X}:[/]  "
+            + "  ".join(parts)
+        )
+        self.query_one("#cfg-status-bar", Static).update(text)
+
+        # Sync button highlights from config bits
+        self._lnb_power = bool(status & 0x04)
+        self._lnb_voltage_high = bool(status & 0x20)
+        self._tone_22khz = bool(status & 0x10)
+
+        self._highlight_lnb_power(self._lnb_power)
+        self._highlight_voltage(self._lnb_voltage_high)
+        self._highlight_tone(self._tone_22khz)
+
+    def _display_config_error(self, error: str) -> None:
+        if not self.is_mounted:
+            return
+        self.query_one("#cfg-status-bar", Static).update(
+            f"[#e04040]Config read error: {error}[/]"
+        )
+
+    # ── UI highlight helpers ──
+
+    def _show_result(self, markup: str) -> None:
+        """Display operation result text."""
+        if not self.is_mounted:
+            return
+        self.query_one("#cfg-result", Static).update(markup)
+
+    def _highlight_lnb_power(self, on: bool) -> None:
+        if not self.is_mounted:
+            return
+        btn_on = self.query_one("#cfg-lnb-on", Button)
+        btn_off = self.query_one("#cfg-lnb-off", Button)
+        if on:
+            btn_on.add_class("-active-setting")
+            btn_off.remove_class("-active-setting")
+        else:
+            btn_off.add_class("-active-setting")
+            btn_on.remove_class("-active-setting")
+
+    def _highlight_voltage(self, high: bool) -> None:
+        if not self.is_mounted:
+            return
+        btn_13 = self.query_one("#cfg-volt-13", Button)
+        btn_18 = self.query_one("#cfg-volt-18", Button)
+        if high:
+            btn_18.add_class("-active-setting")
+            btn_13.remove_class("-active-setting")
+        else:
+            btn_13.add_class("-active-setting")
+            btn_18.remove_class("-active-setting")
+
+    def _highlight_tone(self, on: bool) -> None:
+        if not self.is_mounted:
+            return
+        btn_on = self.query_one("#cfg-tone-on", Button)
+        btn_off = self.query_one("#cfg-tone-off", Button)
+        if on:
+            btn_on.add_class("-active-setting")
+            btn_off.remove_class("-active-setting")
+        else:
+            btn_off.add_class("-active-setting")
+            btn_on.remove_class("-active-setting")
+
+    def _highlight_extra(self, on: bool) -> None:
+        if not self.is_mounted:
+            return
+        btn_on = self.query_one("#cfg-extra-on", Button)
+        btn_off = self.query_one("#cfg-extra-off", Button)
+        if on:
+            btn_on.add_class("-active-setting")
+            btn_off.remove_class("-active-setting")
+        else:
+            btn_off.add_class("-active-setting")
+            btn_on.remove_class("-active-setting")
+
+    def _highlight_port(self, port: int) -> None:
+        if not self.is_mounted:
+            return
+        for p in range(1, 5):
+            btn = self.query_one(f"#cfg-port-{p}", Button)
+            if p == port:
+                btn.add_class("-active-setting")
+            else:
+                btn.remove_class("-active-setting")

tui/src/skywalker_tui/screens/stream.py

@@ -0,0 +1,401 @@
+"""Stream screen -- live MPEG-2 transport stream capture and analysis.
+
+Reads raw TS data from the SkyWalker-1 bulk endpoint, parses 188-byte
+packets in real time, and displays PID distribution statistics alongside
+a hierarchical PSI (PAT/PMT) program structure tree.
+
+Supports file capture mode for saving raw .ts files to disk.
+
+arm_transfer(on) is always paired in try/finally to guarantee the USB
+bulk endpoint is disarmed when monitoring stops.
+"""
+
+import time
+
+from textual.app import ComposeResult
+from textual.containers import Container, Horizontal, Vertical
+from textual.widgets import Label, Input, Button, Static
+from textual import work
+from textual.worker import Worker
+
+from ts_analyze import (
+    TSPacket, PSIParser, parse_pat, parse_pmt,
+    KNOWN_PIDS, TS_PACKET_SIZE,
+)
+
+from skywalker_tui.widgets.pid_table import PidTable
+from skywalker_tui.widgets.psi_tree import PsiTree
+
+
+class StreamScreen(Container):
+    """Live MPEG-2 TS monitor with PID analysis and PSI tree."""
+
+    DEFAULT_CSS = """
+    StreamScreen {
+        layout: vertical;
+    }
+    StreamScreen #stream-main {
+        height: 1fr;
+        layout: horizontal;
+    }
+    StreamScreen #stream-pid-col {
+        width: 3fr;
+        height: 1fr;
+        padding: 1;
+    }
+    StreamScreen #stream-psi-col {
+        width: 2fr;
+        height: 1fr;
+        padding: 1;
+    }
+    StreamScreen #stream-controls {
+        height: auto;
+        padding: 1 2;
+        background: #0e1018;
+        border-top: solid #1a2a3a;
+        layout: horizontal;
+    }
+    StreamScreen #stream-controls Label {
+        width: auto;
+        margin: 1 1 0 0;
+        color: #506878;
+    }
+    StreamScreen #stream-controls Input {
+        width: 14;
+        margin: 0 1;
+    }
+    StreamScreen #stream-controls Button {
+        margin: 0 1;
+    }
+    StreamScreen #stream-stats {
+        height: 3;
+        layout: horizontal;
+        padding: 0 2;
+    }
+    StreamScreen #stream-stats Static {
+        width: 1fr;
+        height: 3;
+        content-align: center middle;
+        background: #121c2a;
+        border: round #1a3050;
+        margin: 0 1 0 0;
+    }
+    """
+
+    def __init__(self, bridge, **kwargs):
+        super().__init__(**kwargs)
+        self._bridge = bridge
+        self._monitoring = False
+        self._capturing = False
+        self._capture_file = None
+        self._monitor_worker: Worker | None = None
+
+        # Accumulated stats (written by worker thread, read by UI thread)
+        self._total_packets = 0
+        self._total_bytes = 0
+        self._tei_count = 0
+        self._pid_counts: dict[int, int] = {}
+        self._cc_last: dict[int, int] = {}
+        self._cc_errors: dict[int, int] = {}
+        self._start_time = 0.0
+
+    def compose(self) -> ComposeResult:
+        with Horizontal(id="stream-main"):
+            with Vertical(id="stream-pid-col"):
+                yield Static(
+                    "[bold #00d4aa]PID Distribution[/]", classes="panel-title"
+                )
+                yield PidTable(id="stream-pid-table")
+            with Vertical(id="stream-psi-col"):
+                yield Static(
+                    "[bold #00d4aa]Program Structure[/]", classes="panel-title"
+                )
+                yield PsiTree(id="stream-psi-tree")
+        with Horizontal(id="stream-stats"):
+            yield Static("[#506878]Packets:[/] [#00d4aa]0[/]", id="stat-packets")
+            yield Static("[#506878]Bytes:[/] [#00d4aa]0[/]", id="stat-bytes")
+            yield Static("[#506878]PIDs:[/] [#00d4aa]0[/]", id="stat-pids")
+            yield Static("[#506878]CC Errors:[/] [#00d4aa]0[/]", id="stat-cc")
+            yield Static(
+                "[#506878]Duration:[/] [#00d4aa]0.0s[/]", id="stat-duration"
+            )
+        with Horizontal(id="stream-controls"):
+            yield Button("Start Monitor", id="stream-start", variant="success")
+            yield Button("Stop", id="stream-stop", variant="error")
+            yield Label("Capture:")
+            yield Input("capture.ts", id="stream-capture-file")
+            yield Button("Capture", id="stream-capture", variant="warning")
+            yield Static("[#506878]Idle[/]", id="stream-status")
+
+    def on_show(self) -> None:
+        """Auto-start monitoring in demo mode when this screen becomes visible."""
+        if self._bridge.is_demo and not self._monitoring:
+            self._start_monitor()
+
+    def on_hide(self) -> None:
+        """Stop monitoring when navigating away from this screen."""
+        self._stop_monitor()
+
+    def on_button_pressed(self, event: Button.Pressed) -> None:
+        if event.button.id == "stream-start":
+            self._start_monitor()
+        elif event.button.id == "stream-stop":
+            self._stop_monitor()
+        elif event.button.id == "stream-capture":
+            self._toggle_capture()
+
+    # -- Monitor lifecycle --
+
+    def _start_monitor(self) -> None:
+        """Begin streaming from the device bulk endpoint."""
+        if self._monitoring:
+            return
+        self._monitoring = True
+        self._reset_stats()
+        self._start_time = time.monotonic()
+        try:
+            self.query_one("#stream-status", Static).update(
+                "[bold #00d4aa]Monitoring[/]"
+            )
+        except Exception:
+            pass
+        self._monitor_worker = self._do_monitor()
+
+    def _stop_monitor(self) -> None:
+        """Stop the monitor worker and clean up capture state."""
+        self._monitoring = False
+        self._capturing = False
+        # Cancel worker BEFORE closing file — worker may still be writing
+        if self._monitor_worker is not None:
+            self._monitor_worker.cancel()
+            self._monitor_worker = None
+        if self._capture_file is not None:
+            self._capture_file.close()
+            self._capture_file = None
+        try:
+            self.query_one("#stream-status", Static).update(
+                "[#506878]Stopped[/]"
+            )
+        except Exception:
+            pass
+
+    def _toggle_capture(self) -> None:
+        """Toggle file capture on/off. Starts monitor if not already running."""
+        if self._capturing:
+            self._capturing = False
+            if self._capture_file is not None:
+                self._capture_file.close()
+                self._capture_file = None
+            try:
+                self.query_one("#stream-capture", Button).label = "Capture"
+            except Exception:
+                pass
+            return
+
+        # Start capture
+        if not self._monitoring:
+            self._start_monitor()
+        filename = self.query_one("#stream-capture-file", Input).value or "capture.ts"
+        try:
+            self._capture_file = open(filename, "wb")
+            self._capturing = True
+            self.query_one("#stream-capture", Button).label = "Stop Capture"
+        except OSError as e:
+            self.app.notify(f"Cannot open {filename}: {e}", severity="error")
+
+    def _reset_stats(self) -> None:
+        """Zero all counters and clear display widgets."""
+        self._total_packets = 0
+        self._total_bytes = 0
+        self._tei_count = 0
+        self._pid_counts.clear()
+        self._cc_last.clear()
+        self._cc_errors.clear()
+        try:
+            self.query_one("#stream-pid-table", PidTable).clear_table()
+            self.query_one("#stream-psi-tree", PsiTree).clear_tree()
+        except Exception:
+            pass
+
+    # -- Background worker --
+
+    @work(thread=True)
+    def _do_monitor(self) -> None:
+        """Background worker: read TS stream, parse packets, post UI updates.
+
+        Runs in a dedicated thread via Textual's @work(thread=True) decorator.
+        Calls arm_transfer(True) on entry and arm_transfer(False) in finally
+        to guarantee the bulk endpoint is always disarmed on exit.
+        """
+        psi_pat = PSIParser()
+        psi_pmt = PSIParser()
+        pat = None
+        pmt_pids: set[int] = set()
+        last_ui_update = 0.0
+
+        try:
+            self._bridge.ensure_booted()
+            self._bridge.arm_transfer(True)
+
+            while self._monitoring:
+                data = self._bridge.read_stream(8192, timeout=1000)
+                if not data:
+                    time.sleep(0.05)
+                    continue
+
+                self._total_bytes += len(data)
+
+                # Write raw data to capture file if active
+                if self._capturing and self._capture_file is not None:
+                    try:
+                        self._capture_file.write(data)
+                    except OSError:
+                        self._capturing = False
+
+                # Parse 188-byte TS packets from the chunk
+                offset = 0
+                while offset + TS_PACKET_SIZE <= len(data):
+                    if data[offset] != 0x47:
+                        # Lost sync, scan forward for next sync byte
+                        offset += 1
+                        continue
+
+                    try:
+                        pkt = TSPacket(data[offset:offset + TS_PACKET_SIZE])
+                    except (ValueError, IndexError):
+                        offset += 1
+                        continue
+
+                    offset += TS_PACKET_SIZE
+                    self._total_packets += 1
+                    pid = pkt.pid
+
+                    # PID counting
+                    self._pid_counts[pid] = self._pid_counts.get(pid, 0) + 1
+
+                    # TEI (Transport Error Indicator) check
+                    if pkt.tei:
+                        self._tei_count += 1
+
+                    # Continuity counter check (payload-bearing, non-null PIDs)
+                    if pkt.adaptation & 0x01 and pid != 0x1FFF:
+                        if pid in self._cc_last:
+                            expected = (self._cc_last[pid] + 1) & 0x0F
+                            if (pkt.continuity != expected
+                                    and pkt.continuity != self._cc_last[pid]):
+                                self._cc_errors[pid] = (
+                                    self._cc_errors.get(pid, 0) + 1
+                                )
+                        self._cc_last[pid] = pkt.continuity
+
+                    # PAT parsing (PID 0x0000)
+                    if pid == 0x0000:
+                        section = psi_pat.feed(pkt)
+                        if section is not None:
+                            parsed = parse_pat(section)
+                            if parsed is not None:
+                                pat = parsed
+                                for prog_num, pmt_pid in pat.get(
+                                    "programs", {}
+                                ).items():
+                                    if prog_num != 0:
+                                        pmt_pids.add(pmt_pid)
+
+                    # PMT parsing (PIDs discovered from PAT)
+                    if pid in pmt_pids:
+                        section = psi_pmt.feed(pkt)
+                        if section is not None:
+                            parsed = parse_pmt(section)
+                            if parsed is not None:
+                                self.app.call_from_thread(
+                                    self._update_pmt, pid, parsed
+                                )
+
+                # Batch UI updates every 500ms to avoid flooding the event loop
+                now = time.monotonic()
+                if now - last_ui_update >= 0.5:
+                    last_ui_update = now
+                    self.app.call_from_thread(
+                        self._update_ui,
+                        pat,
+                        dict(self._pid_counts),
+                        dict(self._cc_errors),
+                        self._total_packets,
+                        self._total_bytes,
+                        self._tei_count,
+                    )
+
+        finally:
+            for _attempt in range(2):
+                try:
+                    self._bridge.arm_transfer(False)
+                    break
+                except Exception:
+                    time.sleep(0.1)
+
+    # -- UI update methods (called from main thread) --
+
+    def _update_ui(
+        self,
+        pat: dict | None,
+        pid_counts: dict[int, int],
+        cc_errors: dict[int, int],
+        total_pkts: int,
+        total_bytes: int,
+        tei_count: int,
+    ) -> None:
+        """Push accumulated stats to display widgets."""
+        if not self.is_mounted:
+            return
+
+        # Build known PID names by merging standard table with PAT-discovered PMTs
+        known = dict(KNOWN_PIDS)
+        if pat:
+            for prog_num, pmt_pid in pat.get("programs", {}).items():
+                if prog_num == 0:
+                    known[pmt_pid] = "NIT"
+                else:
+                    known[pmt_pid] = f"PMT (prog {prog_num})"
+
+        self.query_one("#stream-pid-table", PidTable).update_pids(
+            pid_counts, cc_errors, total_pkts, known
+        )
+
+        if pat:
+            self.query_one("#stream-psi-tree", PsiTree).update_pat(pat)
+
+        total_cc = sum(cc_errors.values())
+        duration = time.monotonic() - self._start_time
+
+        self.query_one("#stat-packets", Static).update(
+            f"[#506878]Packets:[/] [#00d4aa]{total_pkts:,}[/]"
+        )
+
+        if total_bytes >= 1_000_000:
+            bytes_str = f"{total_bytes / 1_000_000:.1f} MB"
+        elif total_bytes >= 1_000:
+            bytes_str = f"{total_bytes / 1_000:.1f} KB"
+        else:
+            bytes_str = str(total_bytes)
+        self.query_one("#stat-bytes", Static).update(
+            f"[#506878]Bytes:[/] [#00d4aa]{bytes_str}[/]"
+        )
+
+        self.query_one("#stat-pids", Static).update(
+            f"[#506878]PIDs:[/] [#00d4aa]{len(pid_counts)}[/]"
+        )
+
+        cc_color = "#e04040" if total_cc > 0 else "#00d4aa"
+        self.query_one("#stat-cc", Static).update(
+            f"[#506878]CC Errors:[/] [{cc_color}]{total_cc}[/]"
+        )
+
+        self.query_one("#stat-duration", Static).update(
+            f"[#506878]Duration:[/] [#00d4aa]{duration:.1f}s[/]"
+        )
+
+    def _update_pmt(self, pmt_pid: int, pmt: dict) -> None:
+        """Push a newly parsed PMT to the PSI tree widget."""
+        if not self.is_mounted:
+            return
+        self.query_one("#stream-psi-tree", PsiTree).update_pmt(pmt_pid, pmt)

tui/src/skywalker_tui/theme.tcss

@@ -339,6 +339,36 @@ SplashScreen #splash-image {
     content-align: center middle;
 }
 
+/* ─── Hex view ─── */
+
+HexView {
+    min-height: 6;
+}
+
+/* ─── PID table ─── */
+
+PidTable {
+    min-height: 8;
+}
+
+/* ─── PSI tree ─── */
+
+PsiTree {
+    min-height: 8;
+}
+
+/* ─── Countdown timer ─── */
+
+CountdownTimer {
+    margin: 1 0;
+}
+
+/* ─── Config bits display ─── */
+
+ConfigBitsDisplay {
+    height: auto;
+}
+
 /* ─── Star Wars overlay ─── */
 
 StarWarsScreen {

tui/src/skywalker_tui/widgets/config_bits.py

@@ -0,0 +1,46 @@
+"""Config byte flag display with colored indicators.
+
+Renders the 8PSK config byte as a horizontal row of labeled flags,
+each shown as a filled (set) or hollow (clear) circle with color coding.
+"""
+
+from textual.widget import Widget
+from textual.widgets import Static
+from textual.app import ComposeResult
+
+from skywalker_lib import CONFIG_BITS
+
+
+class ConfigBitsDisplay(Widget):
+    """Renders the 8PSK config byte as labeled flags with colored indicators."""
+
+    DEFAULT_CSS = """
+    ConfigBitsDisplay {
+        height: auto;
+        padding: 0 1;
+    }
+    """
+
+    def __init__(self, **kwargs):
+        super().__init__(**kwargs)
+        self._config = 0
+
+    def compose(self) -> ComposeResult:
+        yield Static("", id="config-bits-content")
+
+    def update_config(self, config: int) -> None:
+        """Update the displayed config byte value."""
+        self._config = config
+        self._refresh()
+
+    def _refresh(self) -> None:
+        if not self.is_mounted:
+            return
+        parts = []
+        for bit_mask, (name, _field) in CONFIG_BITS.items():
+            is_set = bool(self._config & bit_mask)
+            if is_set:
+                parts.append(f"[bold #00e060]\u25cf[/] [#c8d0d8]{name}[/]")
+            else:
+                parts.append(f"[#3a3a3a]\u25cb[/] [#506878]{name}[/]")
+        self.query_one("#config-bits-content", Static).update("  ".join(parts))

tui/src/skywalker_tui/widgets/countdown_timer.py

@@ -0,0 +1,112 @@
+"""Countdown timer widget with ABORT button for safety-critical operations.
+
+Used before EEPROM write to give the operator 3 seconds to abort.
+The ABORT button is auto-focused on mount so a single Enter/Space press cancels.
+"""
+
+import time
+
+from textual.widget import Widget
+from textual.widgets import Button, Static, ProgressBar
+from textual.app import ComposeResult
+from textual.message import Message
+from textual import work
+
+
+class CountdownTimer(Widget):
+    """3-second countdown with prominent ABORT button.
+
+    Posts CountdownTimer.Completed when the countdown finishes, or
+    CountdownTimer.Aborted if the operator presses ABORT.
+    """
+
+    class Completed(Message):
+        """Fired when countdown finishes without abort."""
+        pass
+
+    class Aborted(Message):
+        """Fired when user presses ABORT."""
+        pass
+
+    DEFAULT_CSS = """
+    CountdownTimer {
+        height: auto;
+        background: #1a0a0a;
+        border: round #e04040;
+        padding: 1 2;
+    }
+    CountdownTimer #countdown-label {
+        text-align: center;
+        color: #e8a020;
+        text-style: bold;
+        margin: 0 0 1 0;
+    }
+    CountdownTimer #countdown-bar {
+        margin: 0 0 1 0;
+    }
+    CountdownTimer #countdown-abort {
+        width: 100%;
+        min-height: 3;
+        background: #e04040;
+        color: #ffffff;
+        text-style: bold;
+        border: round #ff6060;
+    }
+    CountdownTimer #countdown-abort:hover {
+        background: #ff4040;
+    }
+    CountdownTimer #countdown-abort:focus {
+        background: #ff2020;
+        border: round #ffffff;
+    }
+    """
+
+    def __init__(self, **kwargs):
+        super().__init__(**kwargs)
+        self._running = False
+        self._aborted = False
+
+    def compose(self) -> ComposeResult:
+        yield Static("EEPROM WRITE in 3...", id="countdown-label")
+        yield ProgressBar(
+            total=30, show_eta=False, show_percentage=False, id="countdown-bar"
+        )
+        yield Button("ABORT", id="countdown-abort", variant="error")
+
+    def on_mount(self) -> None:
+        self.query_one("#countdown-abort", Button).focus()
+
+    def start(self) -> None:
+        """Begin the 3-second countdown. Call after mounting."""
+        self._running = True
+        self._aborted = False
+        self._do_countdown()
+
+    def on_button_pressed(self, event: Button.Pressed) -> None:
+        if event.button.id == "countdown-abort":
+            self._aborted = True
+            self._running = False
+            self.post_message(self.Aborted())
+
+    @work(thread=True)
+    def _do_countdown(self) -> None:
+        """Tick at 100ms intervals for smooth progress bar animation."""
+        for tick in range(30, -1, -1):
+            if not self._running or self._aborted:
+                return
+            secs = tick / 10
+            self.app.call_from_thread(self._update_display, secs, 30 - tick)
+            time.sleep(0.1)
+        if self._running and not self._aborted:
+            self.app.call_from_thread(self._fire_completed)
+
+    def _update_display(self, secs: float, progress: int) -> None:
+        if not self.is_mounted:
+            return
+        label = self.query_one("#countdown-label", Static)
+        label.update(f"EEPROM WRITE in {secs:.1f}s \u2014 press ABORT to cancel")
+        self.query_one("#countdown-bar", ProgressBar).update(progress=progress)
+
+    def _fire_completed(self) -> None:
+        if self.is_mounted and not self._aborted:
+            self.post_message(self.Completed())

tui/src/skywalker_tui/widgets/hex_view.py

@@ -0,0 +1,90 @@
+"""Scrollable hex dump widget with diff byte highlighting."""
+
+from textual.widget import Widget
+from textual.widgets import Static
+from textual.app import ComposeResult
+from textual.containers import VerticalScroll
+
+
+class HexView(Widget):
+    """Displays a hex dump of binary data with optional diff highlighting.
+
+    Set data via set_data(), optionally passing a set of byte offsets to
+    highlight in red (for verify mismatches). Each row shows 16 bytes in
+    traditional offset : hex : ASCII layout.
+    """
+
+    DEFAULT_CSS = """
+    HexView {
+        height: 1fr;
+        min-height: 6;
+        background: #0e1420;
+        border: round #1a2a3a;
+    }
+    HexView #hex-scroll {
+        height: 1fr;
+        padding: 0 1;
+    }
+    HexView #hex-content {
+        width: auto;
+    }
+    """
+
+    def __init__(self, **kwargs):
+        super().__init__(**kwargs)
+        self._data = b''
+        self._diff_offsets: set[int] = set()
+
+    def compose(self) -> ComposeResult:
+        with VerticalScroll(id="hex-scroll"):
+            yield Static("", id="hex-content")
+
+    def set_data(self, data: bytes, diff_offsets: set[int] | None = None) -> None:
+        """Set data to display. diff_offsets highlights those bytes in red."""
+        self._data = data
+        self._diff_offsets = diff_offsets or set()
+        self._refresh_display()
+
+    def clear(self) -> None:
+        """Clear the hex display."""
+        self._data = b''
+        self._diff_offsets.clear()
+        if self.is_mounted:
+            self.query_one("#hex-content", Static).update("")
+
+    def _refresh_display(self) -> None:
+        if not self.is_mounted:
+            return
+        lines = []
+        for row_off in range(0, len(self._data), 16):
+            row = self._data[row_off:row_off + 16]
+            # Offset column
+            line = f"[#506878]{row_off:04X}:[/] "
+            # Hex bytes
+            hex_parts = []
+            for i, b in enumerate(row):
+                abs_off = row_off + i
+                if abs_off in self._diff_offsets:
+                    hex_parts.append(f"[bold #e04040]{b:02X}[/]")
+                else:
+                    hex_parts.append(f"[#7090a8]{b:02X}[/]")
+            line += " ".join(hex_parts)
+            # Pad if short row
+            if len(row) < 16:
+                line += "   " * (16 - len(row))
+            # ASCII column
+            line += "  "
+            ascii_parts = []
+            for i, b in enumerate(row):
+                abs_off = row_off + i
+                ch = chr(b) if 0x20 <= b < 0x7F else "."
+                if abs_off in self._diff_offsets:
+                    ascii_parts.append(f"[bold #e04040]{ch}[/]")
+                else:
+                    ascii_parts.append(f"[#506878]{ch}[/]")
+            line += "".join(ascii_parts)
+            lines.append(line)
+
+        self.query_one("#hex-content", Static).update(
+            "\n".join(lines) if lines else "[#506878]No data[/]"
+        )

tui/src/skywalker_tui/widgets/pid_table.py

@@ -0,0 +1,74 @@
+"""DataTable wrapper for MPEG-2 TS PID distribution statistics.
+
+Displays per-PID packet counts, percentage share, continuity counter errors,
+and well-known PID names. Table is rebuilt on each update to keep the sort
+order stable (by PID number ascending).
+"""
+
+from textual.widget import Widget
+from textual.widgets import DataTable
+from textual.app import ComposeResult
+
+
+class PidTable(Widget):
+    """Sortable PID statistics table for transport stream analysis."""
+
+    DEFAULT_CSS = """
+    PidTable {
+        height: 1fr;
+        min-height: 8;
+    }
+    """
+
+    def __init__(self, **kwargs):
+        super().__init__(**kwargs)
+        self._pid_data: dict[int, dict] = {}
+        self._total_packets = 0
+
+    def compose(self) -> ComposeResult:
+        table = DataTable(id="pid-stats-table")
+        table.cursor_type = "row"
+        yield table
+
+    def on_mount(self) -> None:
+        table = self.query_one("#pid-stats-table", DataTable)
+        for col in ["PID", "Count", "%", "CC Errors", "Name"]:
+            table.add_column(col, key=col)
+
+    def update_pids(
+        self,
+        pid_counts: dict[int, int],
+        cc_errors: dict[int, int],
+        total: int,
+        known_pids: dict[int, str],
+    ) -> None:
+        """Rebuild the table from accumulated stats.
+
+        Args:
+            pid_counts: Mapping of PID number to total packet count.
+            cc_errors: Mapping of PID number to continuity counter error count.
+            total: Total packet count across all PIDs.
+            known_pids: Mapping of PID number to human-readable name.
+        """
+        self._total_packets = total
+        table = self.query_one("#pid-stats-table", DataTable)
+        table.clear()
+
+        for pid in sorted(pid_counts.keys()):
+            count = pid_counts[pid]
+            pct = (count / total * 100) if total > 0 else 0.0
+            cc_err = cc_errors.get(pid, 0)
+            name = known_pids.get(pid, "")
+            table.add_row(
+                f"0x{pid:04X}",
+                f"{count:,}",
+                f"{pct:.1f}%",
+                str(cc_err) if cc_err > 0 else "-",
+                name,
+            )
+
+    def clear_table(self) -> None:
+        """Remove all rows and reset internal state."""
+        self._pid_data.clear()
+        self._total_packets = 0
+        self.query_one("#pid-stats-table", DataTable).clear()

tui/src/skywalker_tui/widgets/psi_tree.py

@@ -0,0 +1,111 @@
+"""Tree-style display of MPEG-2 PSI structure (PAT/PMT).
+
+Renders a hierarchical view of the Program Association Table and its
+child Program Map Tables using Rich markup inside a Static widget.
+Shows transport stream ID, program numbers, PMT PIDs, PCR PIDs,
+and elementary stream types with their PIDs.
+"""
+
+from textual.widget import Widget
+from textual.widgets import Static
+from textual.app import ComposeResult
+
+
+class PsiTree(Widget):
+    """Hierarchical PAT/PMT display for transport stream program structure."""
+
+    DEFAULT_CSS = """
+    PsiTree {
+        height: 1fr;
+        min-height: 8;
+        background: #0e1420;
+        border: round #1a2a3a;
+        padding: 1;
+        overflow-y: auto;
+    }
+    """
+
+    def __init__(self, **kwargs):
+        super().__init__(**kwargs)
+        self._pat: dict | None = None
+        self._pmts: dict[int, dict] = {}
+
+    def compose(self) -> ComposeResult:
+        yield Static(
+            "[#506878]Waiting for PSI data...[/]", id="psi-content"
+        )
+
+    def update_pat(self, pat: dict) -> None:
+        """Update the Program Association Table and redraw."""
+        self._pat = pat
+        self._refresh()
+
+    def update_pmt(self, pmt_pid: int, pmt: dict) -> None:
+        """Update a Program Map Table and redraw."""
+        self._pmts[pmt_pid] = pmt
+        self._refresh()
+
+    def clear_tree(self) -> None:
+        """Reset all PSI state and show placeholder."""
+        self._pat = None
+        self._pmts.clear()
+        if self.is_mounted:
+            self.query_one("#psi-content", Static).update(
+                "[#506878]Waiting for PSI data...[/]"
+            )
+
+    def _refresh(self) -> None:
+        """Rebuild the tree markup from current PAT/PMT data."""
+        if not self.is_mounted:
+            return
+
+        lines: list[str] = []
+
+        if self._pat:
+            tsid = self._pat.get("transport_stream_id", 0)
+            ver = self._pat.get("version", 0)
+            lines.append(
+                f"[bold #00d4aa]PAT[/] [#506878]TSID=0x{tsid:04X} v{ver}[/]"
+            )
+
+            programs = self._pat.get("programs", {})
+            # Separate NIT (program 0) from real programs
+            real_progs = {k: v for k, v in programs.items() if k != 0}
+
+            for prog_num, pmt_pid in sorted(programs.items()):
+                if prog_num == 0:
+                    lines.append(
+                        f"  [#7090a8]\u251c\u2500[/] [#506878]NIT[/] "
+                        f"PID=0x{pmt_pid:04X}"
+                    )
+                else:
+                    is_last = prog_num == max(real_progs.keys())
+                    prefix = "\u2514\u2500" if is_last else "\u251c\u2500"
+                    lines.append(
+                        f"  [#7090a8]{prefix}[/] "
+                        f"[bold #c8d0d8]Program {prog_num}[/] "
+                        f"PMT=0x{pmt_pid:04X}"
+                    )
+                    # Expand PMT details if available
+                    if pmt_pid in self._pmts:
+                        pmt = self._pmts[pmt_pid]
+                        pcr_pid = pmt.get("pcr_pid", 0)
+                        indent = "   " if is_last else "\u2502  "
+                        lines.append(
+                            f"  {indent} [#506878]PCR PID=0x{pcr_pid:04X}[/]"
+                        )
+                        streams = pmt.get("streams", [])
+                        for j, s in enumerate(streams):
+                            s_last = j == len(streams) - 1
+                            s_prefix = "\u2514\u2500" if s_last else "\u251c\u2500"
+                            type_name = s.get("type_name", "Unknown")
+                            epid = s.get("elementary_pid", 0)
+                            lines.append(
+                                f"  {indent} [#7090a8]{s_prefix}[/] "
+                                f"[#c8d0d8]{type_name}[/] "
+                                f"PID=0x{epid:04X}"
+                            )
+        else:
+            lines.append("[#506878]No PAT received yet[/]")
+
+        self.query_one("#psi-content", Static).update("\n".join(lines))