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64 lines
1.9 KiB
Python
64 lines
1.9 KiB
Python
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#!/usr/bin/env python
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# Copyright 2024 Google LLC
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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from __future__ import with_statement, print_function
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import sys
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import struct
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from fw_binary_info import PebbleFirmwareBinaryInfo
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# typedef struct ATTR_PACKED FirmwareDescription {
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# uint32_t description_length;
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# uint32_t firmware_length;
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# uint32_t checksum;
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# } FirmwareDescription;
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FW_DESCR_FORMAT = '<III'
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FW_DESCR_SIZE = struct.calcsize(FW_DESCR_FORMAT)
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def _generate_firmware_description_struct(firmware_length, firmware_crc):
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return struct.pack(FW_DESCR_FORMAT, FW_DESCR_SIZE, firmware_length, firmware_crc)
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def insert_firmware_description_struct(input_binary, output_binary=None):
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fw_bin_info = PebbleFirmwareBinaryInfo(input_binary)
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with open(input_binary, 'rb') as inf:
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fw_bin = inf.read()
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fw_crc = fw_bin_info.get_crc()
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if output_binary:
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with open(output_binary, 'wb') as outf:
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outf.write(_generate_firmware_description_struct(len(fw_bin), fw_crc))
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outf.write(fw_bin)
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else:
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return _generate_firmware_description_struct(len(fw_bin), fw_crc) + fw_bin
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def usage_and_exit():
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print("Usage: %s INPUT_FILE OUTPUT_FILE" % sys.argv[0])
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sys.exit(1)
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if __name__ == '__main__':
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if len(sys.argv) < 3:
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usage_and_exit()
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input_binary = sys.argv[1]
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output_binary = sys.argv[2]
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insert_firmware_description_struct(input_binary, output_binary)
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