diff --git a/firmware/tools/bmp_to_hex_cpp_arr.py b/firmware/tools/bmp_to_hex_cpp_arr.py
new file mode 100644
index 00000000..ed253416
--- /dev/null
+++ b/firmware/tools/bmp_to_hex_cpp_arr.py
@@ -0,0 +1,49 @@
+# copyleft zxkmm 2024
+
+import os
+import sys
+
+
+def bmp_to_hex_cpp_arr(input_file, output_file):
+
+    with open(input_file, 'rb') as f:
+        data = f.read()
+
+    name_without_extension = os.path.splitext(os.path.basename(input_file))[0]
+
+    with open(output_file, 'w') as f:
+
+        f.write(f"// converted by bmp_to_hex_cpp_arr.py at the firmware/tools dir\n")
+        f.write(f"// fake transparent px should be the exact color rgb(255,0,255), then use true for the last arg "
+                f"when drawing bmp with the draw func\n")
+        f.write(f"\n")
+        f.write(f"const unsigned char {name_without_extension}[] = {{\n")
+
+        # idk about the clang-format rule, but the splash arr is 12 item per line. but other bmp arr is 2 item per line
+        for i in range(0, len(data), 12):
+            line = data[i:i + 12]
+            hex_values = [f"0x{byte:02x}" for byte in line]
+
+            f.write(f"    {', '.join(hex_values)},\n")
+
+        # this is for remove last the extra comma
+        f.seek(f.tell() - 2, os.SEEK_SET)
+        f.truncate()
+
+        f.write("};\n")
+
+
+
+        f.write(f"unsigned int {name_without_extension}_len = {len(data)};\n")
+
+    print(f"done, outputted, pls clang-format yourself before commit (if necessary)：{output_file}")
+
+if __name__ == "__main__":
+    if len(sys.argv) != 3:
+        print("usage: python bmp_to_hex_cpp_arr.py INPUTFILE OUTPUTFILE")
+        sys.exit(1)
+
+    input_file = sys.argv[1]
+    output_file = sys.argv[2]
+
+    bmp_to_hex_cpp_arr(input_file, output_file)
\ No newline at end of file
diff --git a/firmware/tools/hex_cpp_arr_to_bmp.py b/firmware/tools/hex_cpp_arr_to_bmp.py
new file mode 100644
index 00000000..5e4fb80f
--- /dev/null
+++ b/firmware/tools/hex_cpp_arr_to_bmp.py
@@ -0,0 +1,51 @@
+# copyleft zxkmm 2024
+
+import sys
+import re
+
+
+def hex_cpp_arr_to_bmp(input_file, output_file):
+    with open(input_file, 'r') as f:
+        content = f.read()
+
+    # in the mayhem code some of them not const
+    array_name_const = re.search(r'const unsigned char (\w+)\[\]', content)
+    array_name_no_const = re.search(r'unsigned char (\w+)\[]', content)
+    if array_name_const or array_name_no_const:
+
+        if array_name_const:
+            array_name = array_name_const.group(1)
+        else:
+            array_name = array_name_no_const.group(1)
+
+        print(f"Array name: {array_name}")
+
+    else:
+        print("the file provided seems doesn't contains needed arr.")
+        return
+
+    hex_data = re.findall(r'0x[0-9A-Fa-f]{2}', content)
+
+    if not hex_data:
+        print("Error: No hex data found.")
+        return
+
+    binary_data = bytes([int(x, 16) for x in hex_data])
+
+    with open(output_file, 'wb') as f:
+        f.write(binary_data)
+
+    print(f"Done. Output file: {output_file}")
+    print(f"Array name: {array_name}")
+    print(f"Data length: {len(binary_data)} bytes")
+
+
+if __name__ == "__main__":
+    if len(sys.argv) != 3:
+        print("usage: python hex_cpp_arr_to_bmp.py INPUTFILE OUTPUTFILE")
+        sys.exit(1)
+
+    input_file = sys.argv[1]
+    output_file = sys.argv[2]
+
+    hex_cpp_arr_to_bmp(input_file, output_file)
\ No newline at end of file