Import of the watch repository from Pebble

tools/insert_firmware_descr.py

@@ -0,0 +1,63 @@
+#!/usr/bin/env python
+# Copyright 2024 Google LLC
+#
+# 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.
+
+
+from __future__ import with_statement, print_function
+
+import sys
+import struct
+
+from fw_binary_info import PebbleFirmwareBinaryInfo
+
+
+# typedef struct ATTR_PACKED FirmwareDescription {
+#   uint32_t description_length;
+#   uint32_t firmware_length;
+#   uint32_t checksum;
+# } FirmwareDescription;
+FW_DESCR_FORMAT = '<III'
+FW_DESCR_SIZE = struct.calcsize(FW_DESCR_FORMAT)
+
+
+def _generate_firmware_description_struct(firmware_length, firmware_crc):
+    return struct.pack(FW_DESCR_FORMAT, FW_DESCR_SIZE, firmware_length, firmware_crc)
+
+
+def insert_firmware_description_struct(input_binary, output_binary=None):
+    fw_bin_info = PebbleFirmwareBinaryInfo(input_binary)
+    with open(input_binary, 'rb') as inf:
+        fw_bin = inf.read()
+        fw_crc = fw_bin_info.get_crc()
+
+    if output_binary:
+        with open(output_binary, 'wb') as outf:
+            outf.write(_generate_firmware_description_struct(len(fw_bin), fw_crc))
+            outf.write(fw_bin)
+    else:
+        return _generate_firmware_description_struct(len(fw_bin), fw_crc) + fw_bin
+
+
+def usage_and_exit():
+    print("Usage: %s INPUT_FILE OUTPUT_FILE" % sys.argv[0])
+    sys.exit(1)
+
+
+if __name__ == '__main__':
+    if len(sys.argv) < 3:
+        usage_and_exit()
+    input_binary = sys.argv[1]
+    output_binary = sys.argv[2]
+
+    insert_firmware_description_struct(input_binary, output_binary)