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esp8266/makeimg.py: Store firmware size as last 4 bytes of padding area.

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This commit is contained in:
Paul Sokolovsky 2016-08-04 00:19:09 +03:00
parent efb8aa0ef6
commit a621333a4c
1 changed files with 10 additions and 6 deletions
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16
esp8266/makeimg.py
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@ -1,4 +1,5 @@
import sys
import struct
SEGS_MAX_SIZE = 0x9000
@ -11,13 +12,16 @@ with open(sys.argv[3], 'wb') as fout:
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))
pad = b'\xff' * (SEGS_MAX_SIZE - len(data_flash))
assert len(pad) >= 4
fout.write(pad[:-4])
fout.write(struct.pack("I", SEGS_MAX_SIZE + len(data_rom)))
print('padding ', len(pad))
fout.write(data_rom)
print('irom0text', len(data_rom))
print('total ', SEGS_MAX_SIZE + len(data_rom))