micropython/esp8266/makeimg.py

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import sys
SEGS_MAX_SIZE = 0x9000
assert len(sys.argv) == 4
with open(sys.argv[3], 'wb') as fout:
with open(sys.argv[1], 'rb') as f:
data_flash = f.read()
fout.write(data_flash)
print('flash ', len(data_flash))
pad = b'\xff' * (SEGS_MAX_SIZE - len(data_flash))
fout.write(pad)
print('padding ', len(pad))
with open(sys.argv[2], 'rb') as f:
data_rom = f.read()
fout.write(data_rom)
print('irom0text', len(data_rom))
print('total ', SEGS_MAX_SIZE + len(data_rom))