| #!/usr/bin/env python |
| |
| # Copyright (c) 2022 Project CHIP Authors |
| # |
| # Licensed under the Apache License, Version 2.0 (the "License"); |
| # you may not use this file except in compliance with the License. |
| # You may obtain a copy of the License at |
| # |
| # http://www.apache.org/licenses/LICENSE-2.0 |
| # |
| # Unless required by applicable law or agreed to in writing, software |
| # distributed under the License is distributed on an "AS IS" BASIS, |
| # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| # See the License for the specific language governing permissions and |
| # limitations under the License. |
| |
| """Script to extract the factory data content from the matter application + factory data image |
| |
| This script will trim the factory data content out of the matter application image. It will also get the length of the factory data from the matter application map file. The output is the Matter image without the dummy factory data. |
| |
| Run with: |
| python factory_data_trim.py <matter image> <matter image map file> <factory data image> <device family> |
| """ |
| |
| import itertools |
| import re |
| import sys |
| |
| import intelhex |
| |
| matter_app_file = sys.argv[1] |
| matter_app_map_file = sys.argv[2] |
| matter_image_without_factory_data_hex = sys.argv[3] |
| device_family = sys.argv[4] |
| |
| # extract factory data length from map file |
| with open(matter_app_map_file, "r") as map_file: |
| pattern = ".factory_data 0x000fe800" |
| for line in map_file: |
| if re.search(pattern, line): |
| factory_data_num_bytes = line |
| break |
| |
| # this is the length of the factory data in hexadecmial form |
| factory_data_num_bytes = factory_data_num_bytes[32:] |
| |
| # convert hex image to dictionary |
| matter_image = intelhex.IntelHex() |
| matter_image.fromfile(matter_app_file, format='hex') |
| matter_image_dict = matter_image.todict() |
| |
| # 1042432 is 0xFE800 - start of factory data |
| start_index = list(matter_image_dict.keys()).index(1042432) |
| # convert length of factory data into a decimal value |
| end_index = start_index + int(factory_data_num_bytes, 16) |
| |
| # slice dictionary to remove factory data elements |
| matter_image_dict_first_half = dict(itertools.islice(matter_image_dict.items(), 0, start_index)) |
| matter_image_dict_second_half = dict(itertools.islice(matter_image_dict.items(), end_index, len(matter_image_dict))) |
| |
| # convert sliced dictionary to back to hex |
| matter_image_without_factory_data_first_half = intelhex.IntelHex() |
| matter_image_without_factory_data_second_half = intelhex.IntelHex() |
| |
| matter_image_without_factory_data_first_half.fromdict(matter_image_dict_first_half) |
| matter_image_without_factory_data_second_half.fromdict(matter_image_dict_second_half) |
| |
| matter_image_without_factory_data_first_half.merge(matter_image_without_factory_data_second_half, overlap='error') |
| |
| matter_image_without_factory_data_first_half.tofile(matter_image_without_factory_data_hex, format='hex') |