From e84efc2e8c0870117f150b9620b8475e5c86493f Mon Sep 17 00:00:00 2001
From: Eduard Iten <eduard@iten.pro>
Date: Wed, 11 Feb 2026 14:16:52 +0100
Subject: [PATCH] Added lfs generation tool

---
 firmware/tools/littlefs_generator/.gitignore  |  2 +
 .../littlefs_generator/generate_littlefs.py   | 59 +++++++++++++++++++
 .../tools/littlefs_generator/requirements.txt |  2 +
 3 files changed, 63 insertions(+)
 create mode 100644 firmware/tools/littlefs_generator/.gitignore
 create mode 100644 firmware/tools/littlefs_generator/generate_littlefs.py
 create mode 100644 firmware/tools/littlefs_generator/requirements.txt

diff --git a/firmware/tools/littlefs_generator/.gitignore b/firmware/tools/littlefs_generator/.gitignore
new file mode 100644
index 0000000..52261c7
--- /dev/null
+++ b/firmware/tools/littlefs_generator/.gitignore
@@ -0,0 +1,2 @@
+*hex
+source_folder/
diff --git a/firmware/tools/littlefs_generator/generate_littlefs.py b/firmware/tools/littlefs_generator/generate_littlefs.py
new file mode 100644
index 0000000..d62220f
--- /dev/null
+++ b/firmware/tools/littlefs_generator/generate_littlefs.py
@@ -0,0 +1,59 @@
+import os
+from littlefs import LittleFS
+from intelhex import IntelHex
+
+# Konfiguration basierend auf Ihren neuen Log-Daten
+BLOCK_SIZE = 4096   # 0x1000
+BLOCK_COUNT = 2048   # 8 MB Gesamtgröße
+START_ADDR = 0x12000000
+
+fs = LittleFS(
+    block_size=BLOCK_SIZE,
+    block_count=BLOCK_COUNT,
+    read_size=16,
+    prog_size=16,
+    lookahead_size=32,
+    cache_size=64
+)
+
+def add_files_recursive(local_path, lfs_path='/'):
+    if not os.path.exists(local_path):
+        print(f"Warnung: {local_path} nicht gefunden.")
+        return
+    for item in os.listdir(local_path):
+        full_path = os.path.join(local_path, item)
+        target_path = os.path.join(lfs_path, item).replace("\\", "/")
+        
+        if os.path.isfile(full_path):
+            print(f"Adding {target_path}...")
+            with open(full_path, 'rb') as f:
+                with fs.open(target_path, 'wb') as lfs_file:
+                    lfs_file.write(f.read())
+        elif os.path.isdir(full_path):
+            fs.mkdir(target_path)
+            add_files_recursive(full_path, target_path)
+
+# 1. Image im RAM befüllen
+add_files_recursive('./source_folder')
+
+# 2. "Löchriges" (Sparse) iHEX erstellen
+ih = IntelHex()
+lfs_buffer = fs.context.buffer
+
+print("Analysiere Blöcke für Sparse-Export...")
+blocks_written = 0
+
+for i in range(BLOCK_COUNT):
+    offset = i * BLOCK_SIZE
+    block_data = lfs_buffer[offset : offset + BLOCK_SIZE]
+    
+    # Ein Block wird nur in das HEX-File aufgenommen, wenn er nicht leer (0xFF) ist
+    # LittleFS markiert gelöschte/unbenutzte Blöcke mit 0xFF
+    if any(b != 0xFF for b in block_data):
+        ih.frombytes(block_data, offset=START_ADDR + offset)
+        blocks_written += 1
+
+ih.tofile('lfs_external_flash.hex', format='hex')
+
+print(f"Fertig! {blocks_written}/{BLOCK_COUNT} Blöcke ins HEX geschrieben.")
+print(f"Effektive Größe im HEX: {blocks_written * BLOCK_SIZE / 1024:.1f} KB")
\ No newline at end of file
diff --git a/firmware/tools/littlefs_generator/requirements.txt b/firmware/tools/littlefs_generator/requirements.txt
new file mode 100644
index 0000000..d2481eb
--- /dev/null
+++ b/firmware/tools/littlefs_generator/requirements.txt
@@ -0,0 +1,2 @@
+littlefs-python
+intelhex
\ No newline at end of file