41 lines
989 B
Python
41 lines
989 B
Python
import sys
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import struct
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import hashlib
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SEGS_MAX_SIZE = 0x9000
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assert len(sys.argv) == 4
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md5 = hashlib.md5()
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with open(sys.argv[3], 'wb') as fout:
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with open(sys.argv[1], 'rb') as f:
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data_flash = f.read()
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fout.write(data_flash)
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# First 4 bytes include flash size, etc. which may be changed
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# by esptool.py, etc.
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md5.update(data_flash[4:])
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print('flash ', len(data_flash))
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with open(sys.argv[2], 'rb') as f:
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data_rom = f.read()
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pad = b'\xff' * (SEGS_MAX_SIZE - len(data_flash))
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assert len(pad) >= 4
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fout.write(pad[:-4])
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md5.update(pad[:-4])
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len_data = struct.pack("I", SEGS_MAX_SIZE + len(data_rom))
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fout.write(len_data)
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md5.update(len_data)
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print('padding ', len(pad))
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fout.write(data_rom)
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md5.update(data_rom)
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print('irom0text', len(data_rom))
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fout.write(md5.digest())
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print('total ', SEGS_MAX_SIZE + len(data_rom))
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print('md5 ', md5.hexdigest())
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