added little script to write bin size into arm vector

utility/binary_writer.py

+import os
+import struct
+from glob import glob
+
+
+def main():
+    """
+    Was written to assign sixth arm vector to binary size for bootloader.
+    @return:
+    """
+
+    # Parse for binaries
+    file_path = file_selector("../../_bin", '*.bin')
+    file_size = os.path.getsize(file_path)
+    print("File size: " + str(file_size))
+    size_uint32 = struct.pack("<I", file_size)
+    print("File size as uint32: " + ' '.join(map('{:02X}'.format, size_uint32)))
+    with open(file_path, "rb+") as file:
+        # Read the first seven ARM vectors. The sixth one will be replaced.
+        arm_vectors = file.read(4 * 7)
+        arm_vector_6 = arm_vectors[5*4:5*4 + 4]
+        print("ARM vectors: ")
+        # print(''.join('{:02x}'.format(x) for x in arm_vectors))
+        for x in range(0, 28, 4):
+            print(' '.join(map('{:02X}'.format, arm_vectors[x:x + 4])))
+        file.seek(5*4)
+        file.write(size_uint32)
+        file.seek(0)
+        arm_vectors = file.read(4 * 7)
+        print("New ARM vector: ")
+        for x in range(0, 28, 4):
+            print(' '.join(map('{:02X}'.format, arm_vectors[x:x + 4])))
+        pass
+
+
+def file_selector(path: str, pattern: str) -> str:
+    result = [y for x in os.walk(path) for y in glob(os.path.join(x[0], pattern))]
+    print("Files found in _bin folder: ")
+    for idx, path in enumerate(result):
+        print("Selection " + str(idx) + ": " + str(path))
+    selection = input("Please enter desired selection [c to cancel]: ")
+    while True:
+        if selection == 'c':
+            return ""
+        if not selection.isdigit():
+            selection = input("Invalid input, try again [c to cancel]: ")
+        if selection.isdigit():
+            if int(selection) < len(result):
+                return result[int(selection)]
+            else:
+                selection = input("Invalid input, try again [c to cancel]: ")
+
+
+if __name__ == "__main__":
+    main()