9dd793ff19
Large segments will be chunked into 32K blocks to they can be handled seperate. Creating a maximum chunk size allows us to perform a few tricks in the reloader by allowing us to overwrite parts of the reloader whilst it is running! Signed-off-by: Daniel Thompson <daniel@redfelineninja.org.uk>
51 lines
1.4 KiB
Python
Executable file
51 lines
1.4 KiB
Python
Executable file
#!/usr/bin/env python3
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# SPDX-License-Identifier: LGPL-3.0-or-later
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# Copyright (C) 2020 Daniel Thompson
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import binascii
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import intelhex
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import sys
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def generate_c(ihex):
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print('/* this file is auto-generated - DO NOT EDIT */')
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print()
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print('#include <stdint.h>')
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print()
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print('struct segment {')
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print(' uint32_t start;');
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print(' uint32_t end;');
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print(' uint32_t crc32;')
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print(' const uint8_t *data;')
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print('};')
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print()
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segments = []
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chunk = 32 * 1024
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for (start, end) in ihex.segments():
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while start + chunk < end:
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segments.append((start, start + chunk))
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start += chunk
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if start < end:
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segments.append((start, end))
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for i, segment in enumerate(segments):
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print(f'static const uint8_t segment{i}[] = {{', end='')
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for j in range(segment[0], segment[1]):
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if 0 == j % 12:
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print('\n ', end='')
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print(f' 0x{ihex[j]:02x},', end='')
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print('\n};\n')
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print(f'const struct segment segments[] = {{')
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for i, segment in enumerate(segments):
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sg = ihex.tobinarray(start=segment[0], end=segment[1]-1)
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crc = binascii.crc32(sg)
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print(f' 0x{segment[0]:08x}, 0x{segment[1]:08x}, 0x{crc:08x}, segment{i},')
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print('};')
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ihex = intelhex.IntelHex()
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ihex.loadhex(sys.argv[1])
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generate_c(ihex)
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