fix: cancel SD timer on new log output; change popup prompt to QSPI

- ping_ip returns bool, not tuple — fixed 2 unpack errors
- TftpSubStepFrame: _skipped set prevents set_phase from overwriting Skip
- set_expanded(True) before skip marking so UI shows it immediately
- After Step 3 success, fix IP to 192.168.100.11

.gitignore

@@ -6,6 +6,7 @@ dist/
 build/
 *.egg-info/
 *.egg
+*.exe
 
 # ── Python ───────────────────────────────────────────────────
 __pycache__/
@@ -33,7 +34,8 @@ htmlcov/
 # ── Opencode (internal tooling) ──────────────────────────────
 .opencode/
 
-# ── Config overrides (user-specific) ─────────────────────────
+# ── Config (user-specific, auto-generated if missing) ─────────
+config.yaml
 config/zynq_flasher.yaml
 
 # ── Logs ─────────────────────────────────────────────────────

ZynqFlasher.spec

@@ -0,0 +1,63 @@
+# -*- mode: python ; coding: utf-8 -*-
+"""PyInstaller spec for Zynq Flasher — Windows x64 single-exe build.
+
+Usage:
+    pyinstaller --clean --noconfirm ZynqFlasher.spec
+    → output: dist/ZynqFlasher.exe
+"""
+
+from PyInstaller.utils.hooks import collect_data_files, collect_submodules
+
+block_cipher = None
+
+a = Analysis(
+    ['app.py'],
+    pathex=['src'],
+    binaries=[],
+    datas=[
+        # CustomTkinter themes, fonts, icons — auto-collected
+        *collect_data_files('customtkinter'),
+        # Default config shipped as template
+        ('config/default_config.yaml', 'config'),
+    ],
+    hiddenimports=[
+        *collect_submodules('customtkinter'),
+        'darkdetect',
+        'yaml',
+        'serial',
+        'serial.tools',
+        'serial.tools.list_ports',
+    ],
+    hookspath=[],
+    hooksconfig={},
+    runtime_hooks=[],
+    excludes=[],
+    win_no_prefer_redirects=False,
+    win_private_assemblies=False,
+    cipher=block_cipher,
+    noarchive=False,
+)
+
+pyz = PYZ(a.pure)
+
+exe = EXE(
+    pyz,
+    a.scripts,
+    a.binaries,
+    a.zipfiles,
+    a.datas,
+    [],
+    name='ZynqFlasher',
+    debug=False,
+    bootloader_ignore_signals=False,
+    strip=False,
+    upx=True,
+    upx_exclude=[],
+    runtime_tmpdir=None,
+    console=True,       # show console for terminal log output
+    disable_windowed_traceback=False,
+    argv_emulation=False,
+    target_arch=None,
+    codesign_identity=None,
+    entitlements_file=None,
+)

build_windows.bat

@@ -0,0 +1,47 @@
+@echo off
+setlocal
+
+echo ============================================================
+echo   Zynq Flasher — Windows x64 Build Script
+echo ============================================================
+echo.
+
+REM ── 1. Check Python ─────────────────────────────────────────
+python --version >nul 2>&1
+if %errorlevel% neq 0 (
+    echo [ERROR] Python not found. Install Python 3.9+ first.
+    pause
+    exit /b 1
+)
+echo [1/4] Python: OK
+
+REM ── 2. Install dependencies ─────────────────────────────────
+echo [2/4] Installing Python packages...
+pip install -r requirements.txt --quiet
+pip install pyinstaller --quiet
+echo        Done.
+
+REM ── 3. Clean previous builds ────────────────────────────────
+echo [3/4] Cleaning previous builds...
+if exist build rmdir /s /q build
+if exist dist\ZynqFlasher.exe del /q dist\ZynqFlasher.exe
+if not exist dist mkdir dist
+
+REM ── 4. Build ────────────────────────────────────────────────
+echo [4/4] Building ZynqFlasher.exe...
+pyinstaller --clean --noconfirm ZynqFlasher.spec
+
+echo.
+if exist dist\ZynqFlasher.exe (
+    echo ============================================================
+    echo   Build successful!
+    echo   Output: dist\ZynqFlasher.exe
+    echo ============================================================
+) else (
+    echo [ERROR] Build failed — dist\ZynqFlasher.exe not found.
+    pause
+    exit /b 1
+)
+
+endlocal
+pause

config.yaml

@@ -1,27 +0,0 @@
-boot_wait_delay: 10
-bootloader_bin_path: /home/ly0kos/work/Verify/FW/tftp_app/bootloader/bootloader_z100_800M.bin
-bootloader_bit_path: /home/ly0kos/work/Verify/FW/tftp_app/bootloader/pl_arm_wrapper_hw_platform_0/pl_arm_wrapper.bit
-bootloader_elf_path: /home/ly0kos/work/Verify/FW/tftp_app/tftp_app/tftp.elf
-erase_all: false
-firmware_bin_path: /home/ly0kos/work/Verify/FW/V1.3.1.3.3_06_01_pmu_cpld_check/V1.3.1.3.3_06_01_pmu_cpld_check.bin
-flash_model: s25fl256s1
-flash_type: qspi-x4-single
-fsbl_elf_path: /home/ly0kos/work/Verify/FPGA/Xilinx/Z100/fsbl_qspi_bypass.elf
-inter_step_delay: 2
-ping_count: 3
-ping_timeout: 5
-reboot_timeout: 30
-serial_baudrate: 115200
-serial_port: /dev/ttyUSB0
-step_timeouts:
-  bitstream: 60
-  check_env: 30
-  elf_download: 60
-  flash_erase: 120
-  flash_program: 600
-  tftp_reboot: 120
-tftp_upload_name: z7bin
-uart_delay: 3
-xilinx_path: /data/xilinx
-zynq_ip: 192.168.100.11
-zynq_part: XC7Z100

src/bitstream_programmer.py

@@ -271,12 +271,14 @@ def _program_with_vivado(
         callback("progress", "Using Vivado Hardware Manager...")
 
     tcl_content = f"""
-open_hw_manager
+open_hw
 connect_hw_server
 open_hw_target
 current_hw_device [lindex [get_hw_devices] 0]
 program_hw_device -file "{bit_path}"
 refresh_hw_device
+close_hw
+disconnect_hw_server
 quit
 """
     tcl_path = bit_path.parent / "temp_program.tcl"

src/config_manager.py

@@ -28,13 +28,14 @@ DEFAULT_CONFIG: dict[str, Any] = {
     "flash_type": "qspi-x4-single",
     "flash_model": "s25fl256s1",
     "erase_all": False,
+    "download_verify": True,
     "firmware_bin_path": "",
     "reboot_timeout": 30,
     "ping_timeout": 5,
     "ping_count": 3,
     "uart_delay": 3,
     "inter_step_delay": 2,
-    "boot_wait_delay": 10,
+    "boot_wait_delay": 30,
     "step_timeouts": {
         "check_env": 120,
         "flash_erase": 120,
@@ -67,13 +68,14 @@ class Config:
     flash_type: str = "qspi-x4-single"
     flash_model: str = "s25fl256s1"
     erase_all: bool = False
+    download_verify: bool = True
     firmware_bin_path: str = ""
     reboot_timeout: int = 30
     ping_timeout: int = 5
     ping_count: int = 3
     uart_delay: int = 3
     inter_step_delay: int = 2
-    boot_wait_delay: int = 10
+    boot_wait_delay: int = 30
     step_timeouts: dict[str, int] = field(default_factory=lambda: {})
 
     # Internal: path to the config file on disk
@@ -176,6 +178,7 @@ class Config:
             "flash_type": self.flash_type,
             "flash_model": self.flash_model,
             "erase_all": self.erase_all,
+            "download_verify": self.download_verify,
             "firmware_bin_path": self._relative_path(self.firmware_bin_path),
             "reboot_timeout": self.reboot_timeout,
             "ping_timeout": self.ping_timeout,
@@ -190,8 +193,11 @@ class Config:
     def _relative_path(self, path: str) -> str:
         """Convert an absolute path to a relative path from the config file.
 
+        Uses :func:`os.path.relpath` which works across filesystem
+        boundaries (unlike :meth:`Path.relative_to`).
+
         Args:
-            path: Absolute path string.
+            path: Absolute or relative path string.
 
         Returns:
             Relative path string, or the original if conversion fails.
@@ -201,7 +207,8 @@ class Config:
         try:
             target = Path(path)
             if target.is_absolute():
-                return str(target.relative_to(self._config_path.parent))
+                base = str(self._config_path.parent)
+                return os.path.relpath(str(target), base)
         except (ValueError, OSError):
             pass
         return path
@@ -219,6 +226,34 @@ class Config:
             return Path()
         return (self._config_path.parent / relative_path).resolve()
 
+    def validate_paths(self) -> list[str]:
+        """Validate file paths in config and clear those that don't exist.
+
+        Checks each file path field, resolves it against the config
+        directory, and clears it if the target file does not exist
+        on the current filesystem.
+
+        Returns:
+            List of field names that were cleared.
+        """
+        cleared: list[str] = []
+        path_fields = [
+            "bootloader_bit_path",
+            "bootloader_elf_path",
+            "bootloader_bin_path",
+            "fsbl_elf_path",
+            "firmware_bin_path",
+        ]
+        for attr in path_fields:
+            val = getattr(self, attr, "")
+            if not val:
+                continue
+            resolved = self.resolve_path(val)
+            if not resolved.is_file():
+                setattr(self, attr, "")
+                cleared.append(attr)
+        return cleared
+
     @property
     def config_path(self) -> Path | None:
         """Return the path to the config file on disk."""

src/file_utils.py

@@ -0,0 +1,82 @@
+"""File metadata utilities — CRC32, human-readable size, timestamps."""
+
+from __future__ import annotations
+
+import datetime
+import os
+import zlib
+from dataclasses import dataclass
+from pathlib import Path
+
+
+@dataclass
+class FileInfo:
+    """Computed metadata for a single file."""
+
+    path: str
+    exists: bool = False
+    size: int = 0
+    crc32: int = 0
+    mtime: float = 0.0
+
+    @property
+    def size_human(self) -> str:
+        """Human-readable file size (KiB / MiB / GiB)."""
+        if self.size >= 1_073_741_824:
+            return f"{self.size / 1_073_741_824:.2f} GiB"
+        if self.size >= 1_048_576:
+            return f"{self.size / 1_048_576:.2f} MiB"
+        if self.size >= 1_024:
+            return f"{self.size / 1_024:.2f} KiB"
+        return f"{self.size} B"
+
+    @property
+    def mtime_iso(self) -> str:
+        """ISO-formatted modification time, or empty string."""
+        if not self.mtime:
+            return ""
+        return datetime.datetime.fromtimestamp(self.mtime).strftime(
+            "%Y-%m-%d %H:%M:%S"
+        )
+
+    @property
+    def crc32_hex(self) -> str:
+        """8-character hex CRC32 representation."""
+        return f"{self.crc32 & 0xFFFFFFFF:08X}"
+
+
+def compute_file_info(file_path: str | Path) -> FileInfo:
+    """Compute size, CRC32, and modification time for a file.
+
+    If the file does not exist or cannot be read, the returned
+    ``FileInfo`` will have ``exists=False`` and all numeric fields
+    set to zero.
+
+    Args:
+        file_path: Absolute or relative path to the file.
+
+    Returns:
+        FileInfo dataclass with computed metadata.
+    """
+    path = Path(file_path)
+    info = FileInfo(path=str(path))
+    if not path.is_file():
+        return info
+    info.exists = True
+    try:
+        stat = path.stat()
+        info.size = stat.st_size
+        info.mtime = stat.st_mtime
+    except OSError:
+        return info
+
+    # CRC32
+    try:
+        value = 0
+        with open(path, "rb") as f:
+            while chunk := f.read(1_048_576):  # 1 MiB chunks
+                value = zlib.crc32(chunk, value)
+        info.crc32 = value
+    except OSError:
+        pass
+    return info

src/gui/widgets.py

@@ -6,6 +6,7 @@ consistent styling from gui/styles.py.
 
 from __future__ import annotations
 
+import os
 import threading
 
 import customtkinter as ctk
@@ -436,54 +437,91 @@ class ProgressIndicator(ctk.CTkFrame):
 
 
 class StatusDisplay(ctk.CTkFrame):
-    """Status display widget for operation results.
+    """Info display widget — persistent key-value file/device info.
 
-    Shows a status message with color-coded feedback.
+    Shows aligned ``key : value`` lines for file metadata, Zynq
+    part info, tool versions, etc.
     """
 
     def __init__(self, master, **kwargs):
-        """Initialize the status display.
-
-        Args:
-            master: Parent widget.
-        """
         super().__init__(master, **kwargs)
-
+        self._info_items: list[tuple[str, str]] = []
         self._create_widgets()
 
     def _create_widgets(self) -> None:
-        """Create the status display UI."""
-        self._status_label = ctk.CTkLabel(
+        self.grid_rowconfigure(0, weight=1)
+        self.grid_columnconfigure(0, weight=1)
+
+        self._info_text = ctk.CTkTextbox(
             self,
-            text="Ready",
             font=FONT_BODY,
-            anchor="w",
+            corner_radius=CORNER_RADIUS,
+            state="disabled",
+            wrap="word",
         )
-        self._status_label.pack(
-            fill="x", padx=PADDING, pady=PADDING_SMALL
+        self._info_text.grid(
+            row=0, column=0, sticky="nsew", padx=PADDING, pady=PADDING_SMALL
         )
 
+        # Pre-configure tags
+        for name, color in [
+            ("info_label", PRIMARY_COLOR),
+            ("info_value", DESC_TEXT_COLOR if _is_dark() else DESC_TEXT_COLOR_LIGHT),
+        ]:
+            self._info_text.tag_config(name, foreground=color)
+
     def set_status(self, message: str, status: str = "info") -> None:
-        """Update the status message and color.
+        """Compatibility stub — status messages go to log now."""
+
+    def set_info(self, key: str, value: str) -> None:
+        """Set or update a persistent info line.
+
+        Displays as ``key : value`` in the info block.
 
         Args:
-            message: Status message text.
-            status: Status type for coloring ('info', 'success', 'error', 'warning').
+            key: Label for the info line.
+            value: Value string.
         """
-        self._status_label.configure(text=message)
-        colors = {
-            "info": INFO_COLOR,
-            "success": SUCCESS_COLOR,
-            "error": DANGER_COLOR,
-            "warning": WARNING_COLOR,
-        }
-        self._status_label.configure(text_color=colors.get(status, INFO_COLOR))
+        for i, (k, _) in enumerate(self._info_items):
+            if k == key:
+                self._info_items[i] = (key, value)
+                break
+        else:
+            self._info_items.append((key, value))
+        self._refresh_info()
+
+    def clear_info(self) -> None:
+        """Remove all persistent info lines."""
+        self._info_items.clear()
+        self._info_text.configure(state="normal")
+        self._info_text.delete("1.0", "end")
+        self._info_text.configure(state="disabled")
+
+    def _refresh_info(self) -> None:
+        """Rebuild the info text block from current items."""
+        self._info_text.configure(state="normal")
+        self._info_text.delete("1.0", "end")
+        if not self._info_items:
+            self._info_text.configure(state="disabled")
+            return
+        max_key = max(len(k) for k, _ in self._info_items)
+        for key, value in self._info_items:
+            line = f"{key.ljust(max_key + 2)} {value}\n"
+            start = self._info_text.index("end-1c")
+            self._info_text.insert("end", line)
+            end = self._info_text.index("end-1c")
+            self._info_text.tag_add("info_label", start, f"{start}+{len(key)}c")
+            self._info_text.tag_add("info_value", f"{start}+{len(key)}c", end)
+        self._info_text.configure(state="disabled")
 
 
 class FileSelector(ctk.CTkFrame):
     """File selector widget with browse button and path display.
 
-    Allows users to browse for files and displays the selected path.
+    Stores the full absolute path internally but displays only the
+    filename in the entry field.  Supports relative paths: the
+    ``set_relative_path()`` / ``get_relative_path()`` methods work
+    with paths relative to a given base directory.
     """
 
     def __init__(
@@ -506,7 +544,11 @@ class FileSelector(ctk.CTkFrame):
 
         self._callback = callback
         self._file_types = file_types or [("All files", "*")]
-        self._selected_path = ctk.StringVar(value="")
+        self._hint_text = label_text.rstrip(":")  # e.g. "FSBL ELF (.elf)"
+        self._full_path: str = ""           # absolute path (internal)
+        self._relative_path: str = ""       # relative path (synced to Config)
+        self._display_text = ctk.StringVar(value="")
+        self._suppress_callback: bool = False  # True during construction
 
         self._create_widgets(label_text)
 
@@ -524,10 +566,10 @@ class FileSelector(ctk.CTkFrame):
         )
         label.grid(row=0, column=0, sticky="w", padx=(PADDING, PADDING_SMALL))
 
-        # Path entry
+        # Path entry — shows only the filename
         self._entry = ctk.CTkEntry(
             self,
-            textvariable=self._selected_path,
+            textvariable=self._display_text,
             font=FONT_MONO,
             state="readonly",
         )
@@ -549,33 +591,60 @@ class FileSelector(ctk.CTkFrame):
 
     def _browse(self) -> None:
         """Open file dialog and set selected path."""
-        import customtkinter
         from tkinter import filedialog
 
         file_path = filedialog.askopenfilename(
-            title=f"Select {self._selected_path.get() or 'file'}",
+            title=f"Select {self._hint_text}",
             filetypes=self._file_types,
         )
         if file_path:
             self.set_path(file_path)
 
     def set_path(self, path: str) -> None:
-        """Set the selected file path.
+        """Set the selected file path (absolute or relative).
+
+        Internally stores the absolute path and displays only the
+        filename.
 
         Args:
-            path: Absolute path to the selected file.
+            path: Absolute or relative path to the selected file.
         """
-        self._selected_path.set(path)
-        if self._callback:
+        self._full_path = path
+        self._display_text.set(os.path.basename(path) if path else "")
+        if self._callback and not self._suppress_callback:
+            self._callback(path)
+
+    def set_relative_path(self, path: str) -> None:
+        """Set a relative path (from config).
+
+        Resolves to absolute for internal storage, shows only filename.
+
+        Args:
+            path: Relative path string.
+        """
+        self._relative_path = path
+        # Resolve to absolute for internal use
+        if path:
+            self._full_path = path  # caller should resolve before calling
+        self._display_text.set(os.path.basename(path) if path else "")
+        if self._callback and not self._suppress_callback:
             self._callback(path)
 
     def get_path(self) -> str:
-        """Get the currently selected file path.
+        """Get the currently selected file path (absolute).
 
         Returns:
             Selected file path string.
         """
-        return self._selected_path.get()
+        return self._full_path
+
+    def get_relative_path(self) -> str:
+        """Get the currently selected relative path.
+
+        Returns:
+            Relative path string, or empty string.
+        """
+        return self._relative_path
 
 
 class LogDisplay(ctk.CTkFrame):
@@ -650,15 +719,15 @@ class SubStepFrame(ctk.CTkFrame):
     """Collapsible frame showing flash operation sub-steps with status.
 
     Colors match StepHeader: gray pending, blue running (+pulse),
-    green complete, red error. Default expanded.
+    green complete, red error. Default collapsed.
     """
 
     def __init__(self, parent: ctk.CTkFrame) -> None:
         super().__init__(parent, fg_color="transparent")
 
-        self._collapsed = False
+        self._collapsed = True
         self._toggle_btn = ctk.CTkButton(
-            self, text="▼", width=22, height=22,
+            self, text="▶", width=22, height=22,
             font=(FONT_SMALL[0], 9), command=self._toggle,
         )
         self._toggle_btn.grid(row=0, column=0, padx=(4, 4), pady=(2, 2), sticky="w")
@@ -683,6 +752,16 @@ class SubStepFrame(ctk.CTkFrame):
         self.grid_columnconfigure(1, weight=1)
         self._pulse_job: str | None = None
 
+        # Apply initial collapsed state (hide sub-items)
+        self._hide()
+
+    def _hide(self) -> None:
+        """Hide sub-items without toggling state."""
+        for item in self._sub_items:
+            item["dot"].grid_remove()
+            item["label"].grid_remove()
+            item["pct"].grid_remove()
+
     def _toggle(self) -> None:
         self._collapsed = not self._collapsed
         self._toggle_btn.configure(text="▶" if self._collapsed else "▼")
@@ -784,19 +863,20 @@ class TftpSubStepFrame(ctk.CTkFrame):
 
     Sub-steps: Upload, Download Verify, CRC Check, Reboot, Boot Verify.
     Colors match StepHeader: gray pending, blue running (+pulse),
-    green complete, red error. Default expanded.
+    green complete, red error. Default collapsed.
     """
 
     def __init__(self, parent: ctk.CTkFrame, substep_names: list[str] | None = None) -> None:
         super().__init__(parent, fg_color="transparent")
 
-        self._collapsed = False
+        self._collapsed = True
         self._pulse_job: str | None = None
+        self._skipped: set[int] = set()
         self._substep_names = substep_names or ["Upload", "Download Verify", "CRC Check", "Reboot", "Boot Verify"]
         self._num_steps = len(self._substep_names)
 
         self._toggle_btn = ctk.CTkButton(
-            self, text="▼", width=22, height=22,
+            self, text="▶", width=22, height=22,
             font=(FONT_SMALL[0], 9), command=self._toggle,
         )
         self._toggle_btn.grid(row=0, column=0, padx=(4, 4), pady=(2, 2), sticky="w")
@@ -819,6 +899,16 @@ class TftpSubStepFrame(ctk.CTkFrame):
 
         self.grid_columnconfigure(1, weight=1)
 
+        # Apply initial collapsed state (hide sub-items)
+        self._hide()
+
+    def _hide(self) -> None:
+        """Hide sub-items without toggling state."""
+        for item in self._sub_items:
+            item["dot"].grid_remove()
+            item["label"].grid_remove()
+            item["pct"].grid_remove()
+
     def _toggle(self) -> None:
         self._collapsed = not self._collapsed
         self._toggle_btn.configure(text="▶" if self._collapsed else "▼")
@@ -847,6 +937,8 @@ class TftpSubStepFrame(ctk.CTkFrame):
 
         pct_text = f"{pct}%" if pct >= 0 else ""
         for i, item in enumerate(self._sub_items):
+            if i in self._skipped:
+                continue  # leave skipped items untouched
             if i < idx:
                 item["dot"].configure(text="●", text_color=_C_DONE)
                 item["label"].configure(text_color=_C_DONE)
@@ -886,6 +978,18 @@ class TftpSubStepFrame(ctk.CTkFrame):
         item["label"].configure(text_color=_C_ERROR)
         self._stop_pulse()
 
+    def set_step_skipped(self, phase: str) -> None:
+        """Mark a specific step as skipped (warning color, Skip text)."""
+        idx = self._substep_names.index(phase) if phase in self._substep_names else -1
+        if idx < 0:
+            return
+        self._skipped.add(idx)
+        item = self._sub_items[idx]
+        item["dot"].configure(text="◌", text_color=WARNING_COLOR)
+        item["label"].configure(text_color=WARNING_COLOR)
+        item["pct"].configure(text="Skip", text_color=WARNING_COLOR)
+        self._stop_pulse()
+
     def _start_pulse(self, idx: int) -> None:
         """Start pulsing the running sub-step."""
         _LIGHT = RUNNING_FADE_LIGHT
@@ -910,6 +1014,7 @@ class TftpSubStepFrame(ctk.CTkFrame):
 
     def reset(self) -> None:
         self._stop_pulse()
+        self._skipped.clear()
         _C = ACCENT_PENDING
         for i, item in enumerate(self._sub_items):
             item["dot"].configure(text="○", text_color=_C)
@@ -967,7 +1072,7 @@ class UartMonitorWindow(ctk.CTkToplevel):
         self._build_log_area()
         self._build_status_bar()
 
-       # Try to open serial port after window is drawn
+        # Try to open serial port after window is drawn
         self.after(100, self._try_open)
 
     # ── Title Bar ──────────────────────────────────────────────

src/serial_monitor.py

@@ -137,6 +137,7 @@ def check_uart_available(
     port: str,
     baudrate: int = 115200,
     timeout: float = 3.0,
+    monitor: UartMonitor | None = None,
 ) -> tuple[bool, str]:
     """Check whether the UART serial port is available and readable.
 
@@ -145,19 +146,24 @@ def check_uart_available(
     considered available (the device may simply not be outputting yet).
     If the port cannot be opened at all, it is unavailable.
 
+    If *monitor* is provided and currently running, the function
+    skips the port-open test (which would fail on Windows with
+    Error 13 due to exclusive access) and returns True immediately.
+
     Args:
         port: Serial port device path (e.g., '/dev/ttyUSB0').
         baudrate: Baud rate for serial communication.
         timeout: Seconds to wait for data after opening.
+        monitor: Optional running UartMonitor — if active, reuse it.
 
     Returns:
         Tuple of (is_available, reason_string).
-        - (True,  "Port open") — port is usable
-        - (True,  "Port open, no data yet") — port open, no data currently
-        - (False, "No serial ports detected") — system has no serial ports
-        - (False, "Port not in detected ports") — configured port missing
-        - (False, "Failed to open: <error>") — port open error
     """
+    # Reuse existing monitor when available (avoids Error 13 on Windows)
+    if monitor is not None and monitor.is_running():
+        return True, "Already monitoring"
+
+    # 1. Quick port list check
     # 1. Quick port list check
     ports = detect_serial_ports()
     if not ports:
@@ -223,25 +229,31 @@ def test_serial_version(
     port: str,
     baudrate: int = 115200,
     timeout: float = 5.0,
+    monitor: UartMonitor | None = None,
 ) -> tuple[bool, str, str]:
     """Test serial port by sending 'ver()' command and parsing response.
 
-    Sends 'ver\\r\\n' to the serial port and reads the response.
-    Attempts to parse version string from the response.
+    If *monitor* is running, skips opening a new connection and
+    returns the latest parsed version from the monitor instead.
 
     Args:
         port: Serial port device path (e.g., '/dev/ttyUSB0').
         baudrate: Baud rate for serial communication.
         timeout: Read timeout in seconds.
+        monitor: Optional running UartMonitor — if active, reuse it.
 
     Returns:
         Tuple of (success, message, version_string).
-        - (True, "Version: x.y.z", "x.y.z") — version detected
-        - (True, "Port responded", "") — port responded but no version
-        - (False, "Error message", "") — error occurred
     """
     import serial
 
+    # Reuse existing monitor when available (avoids Error 13 on Windows)
+    if monitor is not None and monitor.is_running():
+        info = monitor.latest_info
+        if info and info.version:
+            return True, f"Version: {info.version}", info.version
+        return True, "Port monitored, no version parsed yet", ""
+
     try:
         with serial.Serial(port, baudrate, timeout=timeout) as ser:
             ser.reset_input_buffer()

src/vitis_checker.py

@@ -60,7 +60,8 @@ TOOL_ALIASES: dict[str, list[str]] = {
 }
 
 # Product subdirectories under xilinx_root to scan (in preference order)
-_PRODUCT_DIRS = ("Vitis", "Vivado")
+# SDK covers pre-2019 installations where xsct lived in SDK/*/bin/
+_PRODUCT_DIRS = ("Vitis", "Vivado", "SDK")
 
 
 # ── Version helpers ──────────────────────────────────────────────────
@@ -163,9 +164,9 @@ def _find_executable(
     """Find an executable by name using PATH, Vitis, and Xilinx root.
 
     Search order:
-    1. System PATH (shutil.which)
+    1. System PATH (shutil.which) — tries bare name, .exe, .bat on Windows
     2. vitis_path/bin (legacy config)
-    3. xilinx_root/Vitis/*/bin and Vivado/*/bin — pick NEWEST version
+    3. xilinx_root/Vitis/*/bin, Vivado/*/bin, SDK/*/bin — pick NEWEST version
     4. Common install paths (cross-platform)
 
     Args:
@@ -179,16 +180,22 @@ def _find_executable(
     """
     exec_suffix = ".exe" if system == "windows" else ""
 
-    # 1. System PATH
-    found = shutil.which(f"{exec_name}{exec_suffix}")
+    # 1. System PATH — search without explicit extension first
+    #    so Windows PATHEXT resolves .bat/.exe/.cmd automatically
+    found = shutil.which(exec_name)
+    if not found and exec_suffix:
+        found = shutil.which(f"{exec_name}{exec_suffix}")
+        if not found:
+            found = shutil.which(f"{exec_name}.bat")
     if found:
         return found
 
     # 2. Legacy vitis_path/bin
     if vitis_path:
-        candidate = Path(vitis_path) / "bin" / f"{exec_name}{exec_suffix}"
-        if candidate.is_file():
-            return str(candidate)
+        for sfx in (".bat", ".exe") if system == "windows" else (exec_suffix,):
+            candidate = Path(vitis_path) / "bin" / f"{exec_name}{sfx}"
+            if candidate.is_file():
+                return str(candidate)
 
     # 3. Scan xilinx_root — pick newest version across Vitis + Vivado
     if xilinx_root:
@@ -203,8 +210,8 @@ def _find_executable(
     if system == "windows":
         common: list[str] = []
         for sfx in (".bat", ".exe"):
-            for ver in ("2023.2", "2022.2"):
-                for prod in ("Vitis", "Vivado"):
+            for ver in ("2023.2", "2022.2", "2018.3"):
+                for prod in ("Vitis", "Vivado", "SDK"):
                     common.append(f"C:/Xilinx/{prod}/{ver}/bin/{exec_name}{sfx}")
     else:
         common = [

src/zynq_checker.py

@@ -53,6 +53,7 @@ class ZynqCheckResult:
     pl_detected: bool
     hw_server_url: str
     error: str = ""
+    hw_server_pid: int | None = None
 
 
 # ── Patterns ──────────────────────────────────────────────────────────
@@ -104,12 +105,14 @@ def check_zynq_jtag(
 
     # ── 2. Start hw_server ─────────────────────────────────────
     hw_proc: subprocess.Popen | None = None
+    hw_pid: int | None = None
     try:
         hw_proc = subprocess.Popen(
             build_tool_command(hw_server_path),
             stdout=subprocess.DEVNULL,
             stderr=subprocess.DEVNULL,
         )
+        hw_pid = hw_proc.pid
         # Wait up to 10s for hw_server to bind
         started = False
         for _ in range(100):
@@ -118,14 +121,14 @@ def check_zynq_jtag(
                 started = True
                 break
         if not started:
-            return _fail("hw_server did not bind port 3121 within 10s", hw_server_url)
+            return _fail("hw_server did not bind port 3121 within 10s", hw_server_url, pid=hw_pid)
     except OSError as e:
         return _fail(f"Failed to start hw_server: {e}", hw_server_url)
 
     if callback:
         callback("progress", "Scanning JTAG chain...")
 
-    # ── 3. Run Vivado TCL (stream output to callback) ──────────
+    # ── 3. Run Vivado TCL ──────────────────────────────────────
     tcl = _build_jtag_query_tcl()
     python_timeout = config.step_timeouts.get("check_env", 120)
 
@@ -141,39 +144,35 @@ def check_zynq_jtag(
 
     output_lines: list[str] = []
     try:
-        proc = subprocess.Popen(
-            build_tool_command(vivado_path, *vivado_args),
-            stdout=subprocess.PIPE, stderr=subprocess.STDOUT,
+        cmd = build_tool_command(vivado_path, *vivado_args)
+        # Use run() with communicate() under the hood — reliably
+        # drains pipes on Windows even when .bat wrappers are involved
+        result = subprocess.run(
+            cmd,
+            capture_output=True,
             text=True,
+            timeout=python_timeout,
+        )
+        output = result.stdout + result.stderr
+        for line in output.splitlines():
+            stripped = line.strip()
+            if stripped:
+                output_lines.append(stripped)
+                if callback:
+                    callback("progress", stripped)
+    except subprocess.TimeoutExpired:
+        return _fail(
+            f"JTAG scan timed out after {python_timeout}s",
+            hw_server_url,
+            pid=hw_pid,
         )
-        # Read line by line so user sees real-time progress
-        deadline = time.monotonic() + python_timeout
-        while True:
-            line = proc.stdout.readline() if proc.stdout else ""
-            if not line:
-                if proc.poll() is not None:
-                    break
-                if time.monotonic() > deadline:
-                    proc.kill()
-                    proc.wait()
-                    return _fail(
-                        f"JTAG scan timed out after {python_timeout}s",
-                        hw_server_url,
-                    )
-                time.sleep(0.1)
-                continue
-            line = line.rstrip("\n\r")
-            output_lines.append(line)
-            if callback and line.strip():
-                callback("progress", line)
     except OSError as e:
-        return _fail(f"Failed to run Vivado: {e}", hw_server_url)
+        return _fail(f"Failed to run Vivado: {e}", hw_server_url, pid=hw_pid)
     finally:
         try:
             Path(tcl).unlink(missing_ok=True)
         except Exception:
             pass
-        # Clean up Vivado temp files we redirected
         for f in ("vivado_jtag.jou", "vivado_jtag.log"):
             try:
                 (Path(tmp) / f).unlink(missing_ok=True)
@@ -206,6 +205,7 @@ def check_zynq_jtag(
             ps_detected=False, pl_detected=False,
             hw_server_url=hw_server_url,
             error=msg,
+            hw_server_pid=hw_pid,
         )
 
     ps_detected = any(d.is_arm_dap for d in jtag_chain)
@@ -217,16 +217,18 @@ def check_zynq_jtag(
         ps_detected=ps_detected, pl_detected=pl_detected,
         hw_server_url=hw_server_url,
         error="",
+        hw_server_pid=hw_pid,
     )
 
 
 # ── Helpers ───────────────────────────────────────────────────────────
 
-def _fail(error: str, url: str) -> ZynqCheckResult:
+def _fail(error: str, url: str, pid: int | None = None) -> ZynqCheckResult:
     return ZynqCheckResult(
         devices=[], jtag_chain=[], is_present=False,
         ps_detected=False, pl_detected=False,
         hw_server_url=url, error=error,
+        hw_server_pid=pid,
     )
 
 
@@ -257,7 +259,7 @@ def _extract_relevant(output: str) -> str:
 def _build_jtag_query_tcl() -> str:
     """Build Vivado TCL script file for JTAG device enumeration."""
     content = """\
-open_hw_manager
+open_hw
 connect_hw_server
 open_hw_target
 puts "===JTAG_START==="
@@ -267,6 +269,8 @@ foreach dev [get_hw_devices] {
   puts "DEVICE:$name IDCODE:$idcode"
 }
 puts "===JTAG_END==="
+close_hw
+disconnect_hw_server
 quit
 """
     import os