✨ feat: flash phase tracking, erase checkbox, flash_model config

Step 2 UI now shows real-time flash operation phases parsed from program_flash output:
- Erase: "Performing Erase Operation..." → sf erase → Erased: OK
- Program: "Performing Program Operation..." → write blocks 0%→100%
- Verify: "Performing Verify Operation..." → read+cmp 0%→100%

Configuration additions:
- erase_before_program checkbox: controls whether to pre-erase before programming
- flash_model: chip type for capacity reference (s25fl256s1 = 32 MiB)

subprocess_utils.py now emits 'phase' callbacks (erase/program/verify/done)
detected from program_flash output transitions.

config.yaml

@@ -3,6 +3,8 @@ bootloader_bit_path: /home/ly0kos/work/Verify/FW/tftp_app/bootloader/pl_arm_wrap
 bootloader_elf_path: /home/ly0kos/work/Verify/FW/tftp_app/bootloader/app.elf
 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_type: qspi-x4-single
+flash_model: s25fl256s1
+erase_before_program: true
 fsbl_elf_path: /home/ly0kos/work/Verify/FPGA/Xilinx/Z100/fsbl_qspi_bypass.elf
 inter_step_delay: 2
 ping_count: 3
@@ -10,15 +12,14 @@ ping_timeout: 5
 reboot_timeout: 30
 serial_baudrate: 115200
 serial_port: /dev/ttyUSB0
-tftp_upload_name: z7bin
-uart_delay: 3
-inter_step_delay: 2
 step_timeouts:
+  bitstream: 60
   check_env: 30
+  elf_download: 60
   flash_erase: 120
   flash_program: 600
-  bitstream: 60
-  elf_download: 60
   tftp_reboot: 120
-vitis_path: ""
+tftp_upload_name: z7bin
+uart_delay: 3
+vitis_path: ''
 zynq_ip: 192.168.100.11

config/default_config.yaml

@@ -22,9 +22,13 @@ bootloader_elf_path: ""
 # bootloader_bin_path is the bootloader image to program into QSPI flash
 # fsbl_elf_path is the FSBL (First Stage Boot Loader) required by program_flash
 # flash_type sets the QSPI interface mode (qspi-x4-single, qspi-x8-dual_parallel, etc.)
+# flash_model determines chip capacity: s25fl256s1=32MiB, s25fl128s=16MiB, etc.
+# erase_before_program: if true, erase flash sectors before programming
 bootloader_bin_path: ""
 fsbl_elf_path: ""
 flash_type: "qspi-x4-single"
+flash_model: "s25fl256s1"
+erase_before_program: true
 
 # Firmware upload (Step 4: Load Main Program via TFTP)
 firmware_bin_path: ""

src/config_manager.py

@@ -25,6 +25,8 @@ DEFAULT_CONFIG: dict[str, Any] = {
     "bootloader_bin_path": "",
     "fsbl_elf_path": "",
     "flash_type": "qspi-x4-single",
+    "flash_model": "s25fl256s1",
+    "erase_before_program": True,
     "firmware_bin_path": "",
     "reboot_timeout": 30,
     "ping_timeout": 5,
@@ -60,6 +62,8 @@ class Config:
     bootloader_bin_path: str = ""
     fsbl_elf_path: str = ""
     flash_type: str = "qspi-x4-single"
+    flash_model: str = "s25fl256s1"
+    erase_before_program: bool = True
     firmware_bin_path: str = ""
     reboot_timeout: int = 30
     ping_timeout: int = 5
@@ -166,6 +170,8 @@ class Config:
             "bootloader_bin_path": self._relative_path(self.bootloader_bin_path),
             "fsbl_elf_path": self._relative_path(self.fsbl_elf_path),
             "flash_type": self.flash_type,
+            "flash_model": self.flash_model,
+            "erase_before_program": self.erase_before_program,
             "firmware_bin_path": self._relative_path(self.firmware_bin_path),
             "reboot_timeout": self.reboot_timeout,
             "ping_timeout": self.ping_timeout,

src/flash_programmer.py

@@ -279,7 +279,11 @@ def full_flash_program(
     bin_path: str | Path,
     callback: ProgressCallback = None,
 ) -> list[FlashResult]:
-    """Execute full flash workflow: wipe → program → verify.
+    """Execute full flash workflow: (optional wipe) → program → verify.
+
+    If config.erase_before_program is True, erases flash sectors before
+    programming. Otherwise, program_flash handles sector erase during
+    programming (per-sector, not full chip).
 
     Args:
         config: Application configuration.
@@ -291,10 +295,17 @@ def full_flash_program(
     """
     results: list[FlashResult] = []
 
-    # Step 1: Erase the entire flash
+    # Step 1: Erase (optional — controlled by config.erase_before_program)
-    results.append(wipe_flash(config, callback))
+    if getattr(config, 'erase_before_program', True):
-    if not results[-1].success:
+        results.append(wipe_flash(config, callback))
-        return results
+        if not results[-1].success:
+            return results
+    else:
+        results.append(FlashResult(
+            step="wipe",
+            success=True,
+            message="Erase skipped (handled by program_flash)",
+        ))
 
     # Step 2: Program and verify (program_flash -verify)
     results.append(program_flash_bin(config, bin_path, callback))

src/gui/main_window.py

@@ -80,6 +80,7 @@ class MainWindow(ctk.CTk):
         self._zynq_jtag_present: bool = False
         self._zynq_jtag_info = None
         self._uart_monitor: UartMonitor | None = None
+        self._flash_phase: str = ""
 
         # StringVar references for config sync
         self._ip_string_var: ctk.StringVar | None = None
@@ -186,6 +187,7 @@ class MainWindow(ctk.CTk):
         self._config.bootloader_elf_path = files["bootloader_elf_path"]
         self._config.bootloader_bin_path = files["bootloader_bin_path"]
         self._config.fsbl_elf_path = files["fsbl_elf_path"]
+        self._config.erase_before_program = self._erase_cb_var.get()
         self._config.firmware_bin_path = files["firmware_bin_path"]
 
     def _save_config(self) -> None:
@@ -398,7 +400,7 @@ class MainWindow(ctk.CTk):
             row=0, column=0, sticky="nsew",
             padx=PADDING, pady=PADDING,
         )
-        panel.grid_rowconfigure(6, weight=1)
+        panel.grid_rowconfigure(7, weight=1)
 
         title = ctk.CTkLabel(
             panel,
@@ -461,6 +463,27 @@ class MainWindow(ctk.CTk):
             self._fsbl_selector.set_path(str(resolved))
         self._fsbl_selector.grid(row=5, column=0, sticky="nsew", padx=PADDING, pady=PADDING_SMALL)
 
+        # Flash options
+        flash_frame = ctk.CTkFrame(panel)
+        flash_frame.grid(row=6, column=0, sticky="nsew", padx=PADDING, pady=PADDING_SMALL)
+        flash_frame.grid_columnconfigure(0, weight=1)
+
+        self._erase_cb_var = ctk.BooleanVar(value=self._config.erase_before_program)
+        self._erase_cb = ctk.CTkCheckBox(
+            flash_frame,
+            text="Erase flash before programming",
+            variable=self._erase_cb_var,
+            font=FONT_SMALL,
+        )
+        self._erase_cb.grid(row=0, column=0, sticky="w", padx=PADDING_SMALL)
+
+        flash_model_label = ctk.CTkLabel(
+            flash_frame,
+            text=f"Flash: {self._config.flash_model} (32 MiB)",
+            font=FONT_SMALL,
+        )
+        flash_model_label.grid(row=1, column=0, sticky="w", padx=PADDING_SMALL, pady=(2, 0))
+
         # Firmware BIN path (TFTP upload)
         self._firmware_bin_selector = FileSelector(
             panel,
@@ -470,7 +493,7 @@ class MainWindow(ctk.CTk):
         if self._config.firmware_bin_path:
             resolved = self._config.resolve_path(self._config.firmware_bin_path)
             self._firmware_bin_selector.set_path(str(resolved))
-        self._firmware_bin_selector.grid(row=6, column=0, sticky="nsew", padx=PADDING, pady=PADDING_SMALL)
+        self._firmware_bin_selector.grid(row=7, column=0, sticky="nsew", padx=PADDING, pady=PADDING_SMALL)
 
         # Save button
         save_btn = ctk.CTkButton(
@@ -479,7 +502,7 @@ class MainWindow(ctk.CTk):
             font=FONT_SMALL,
             command=self._save_config,
         )
-        save_btn.grid(row=7, column=0, padx=PADDING, pady=PADDING)
+        save_btn.grid(row=8, column=0, padx=PADDING, pady=PADDING)
 
     def _build_serial_panel(self, parent: ctk.CTkFrame) -> None:
         """Build the serial monitor panel."""
@@ -725,7 +748,21 @@ class MainWindow(ctk.CTk):
             return False
 
     def _flash_callback(self, status: str, message: str) -> None:
-        """Callback for flash programming progress."""
+        """Callback for flash programming progress — tracks phases."""
+        if status == "phase":
+            # Track current flash phase for UI
+            self._flash_phase = message  # 'erase', 'program', 'verify', 'done'
+            phase_names = {"erase": "Erasing", "program": "Programming", "verify": "Verifying", "done": "Done"}
+            label = phase_names.get(message, message)
+            self._log_message(f"  ▸ {label}")
+            return
+        if status == "progress":
+            pct = message.rstrip('%')
+            # Show progress within current phase
+            phase_label = {"erase": "Erase", "program": "Program", "verify": "Verify"}.get(
+                self._flash_phase, "Flash")
+            self._log_message(f"  [{phase_label}] {pct}%")
+            return
         self._log_message(f"  [{status}] {message}")
 
     def _jtag_callback(self, status: str, message: str) -> None:

src/subprocess_utils.py

@@ -1,7 +1,8 @@
 """Non-blocking subprocess execution with real-time output parsing.
 
 Provides run_streaming() which streams stdout/stderr to callbacks
-in real time, parsing for warnings, errors, and progress indicators.
+in real time, parsing for warnings, errors, progress indicators,
+and flash operation phase transitions (erase/program/verify).
 Used by flash_programmer and bitstream_programmer.
 """
 
@@ -15,7 +16,7 @@ from typing import Callable
 
 StreamCallback = Callable[[str, str], None] | None
 """Callback type: (category, message) where category is one of:
-   'out', 'err', 'warn', 'error', 'progress', 'done'"""
+   'out', 'err', 'warn', 'error', 'progress', 'phase', 'done'"""
 
 # Regex patterns for parsing tool output
 _WARNING_RE = re.compile(r"WARNING\s*[:\[].*", re.IGNORECASE)
@@ -24,6 +25,12 @@ _PROGRESS_RE = re.compile(r"(\d{1,3})\s*%")
 _INFO_KEYWORDS = ["connected", "downloading", "running", "initialization",
                   "verif", "write", "erase", "flash operation"]
 
+# Phase transition patterns for program_flash output
+_PHASE_ERASE_RE = re.compile(r"Performing Erase Operation", re.IGNORECASE)
+_PHASE_PROGRAM_RE = re.compile(r"Performing Program Operation", re.IGNORECASE)
+_PHASE_VERIFY_RE = re.compile(r"Performing Verify Operation", re.IGNORECASE)
+_PHASE_DONE_RE = re.compile(r"(Erase|Program|Verify) Operation successful", re.IGNORECASE)
+
 
 def run_streaming(
     cmd: list[str],
@@ -133,6 +140,24 @@ def _parse_and_callback(
         callback("warn", line)
         return
 
+    # Check for phase transitions (program_flash output)
+    if _PHASE_ERASE_RE.search(line):
+        callback("phase", "erase")
+        callback("out", line)
+        return
+    if _PHASE_PROGRAM_RE.search(line):
+        callback("phase", "program")
+        callback("out", line)
+        return
+    if _PHASE_VERIFY_RE.search(line):
+        callback("phase", "verify")
+        callback("out", line)
+        return
+    if _PHASE_DONE_RE.search(line):
+        callback("phase", "done")
+        callback("out", line)
+        return
+
     # Check for progress percentage
     m = _PROGRESS_RE.search(line)
     if m: