88 lines
2.8 KiB
Python
88 lines
2.8 KiB
Python
# Combine bootloader, partition table and application into a final binary.
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import os, sys
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sys.path.append(os.getenv("IDF_PATH") + "/components/partition_table")
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import gen_esp32part
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OFFSET_BOOTLOADER_DEFAULT = 0x1000
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OFFSET_PARTITIONS_DEFAULT = 0x8000
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def load_sdkconfig_hex_value(filename, value, default):
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value = "CONFIG_" + value + "="
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with open(filename, "r") as f:
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for line in f:
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if line.startswith(value):
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return int(line.split("=", 1)[1], 16)
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return default
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def load_partition_table(filename):
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with open(filename, "rb") as f:
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return gen_esp32part.PartitionTable.from_binary(f.read())
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# Extract command-line arguments.
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arg_sdkconfig = sys.argv[1]
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arg_bootloader_bin = sys.argv[2]
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arg_partitions_bin = sys.argv[3]
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arg_application_bin = sys.argv[4]
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arg_output_bin = sys.argv[5]
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# Load required sdkconfig values.
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offset_bootloader = load_sdkconfig_hex_value(
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arg_sdkconfig, "BOOTLOADER_OFFSET_IN_FLASH", OFFSET_BOOTLOADER_DEFAULT
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)
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offset_partitions = load_sdkconfig_hex_value(
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arg_sdkconfig, "PARTITION_TABLE_OFFSET", OFFSET_PARTITIONS_DEFAULT
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)
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# Load the partition table.
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partition_table = load_partition_table(arg_partitions_bin)
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max_size_bootloader = offset_partitions - offset_bootloader
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max_size_partitions = 0
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offset_application = 0
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max_size_application = 0
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# Inspect the partition table to find offsets and maximum sizes.
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for part in partition_table:
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if part.name == "nvs":
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max_size_partitions = part.offset - offset_partitions
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elif part.type == gen_esp32part.APP_TYPE and offset_application == 0:
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offset_application = part.offset
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max_size_application = part.size
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# Define the input files, their location and maximum size.
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files_in = [
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("bootloader", offset_bootloader, max_size_bootloader, arg_bootloader_bin),
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("partitions", offset_partitions, max_size_partitions, arg_partitions_bin),
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("application", offset_application, max_size_application, arg_application_bin),
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]
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file_out = arg_output_bin
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# Write output file with combined firmware.
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cur_offset = offset_bootloader
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with open(file_out, "wb") as fout:
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for name, offset, max_size, file_in in files_in:
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assert offset >= cur_offset
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fout.write(b"\xff" * (offset - cur_offset))
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cur_offset = offset
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with open(file_in, "rb") as fin:
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data = fin.read()
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fout.write(data)
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cur_offset += len(data)
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print(
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"%-12s@0x%06x % 8d (% 8d remaining)"
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% (name, offset, len(data), max_size - len(data))
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)
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if len(data) > max_size:
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print(
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"ERROR: %s overflows allocated space of %d bytes by %d bytes"
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% (name, max_size, len(data) - max_size)
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)
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sys.exit(1)
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print("%-22s% 8d" % ("total", cur_offset))
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