From a621333a4c4fcc161f076980c9147faa555de5de Mon Sep 17 00:00:00 2001
From: Paul Sokolovsky <pfalcon@users.sourceforge.net>
Date: Thu, 4 Aug 2016 00:19:09 +0300
Subject: [PATCH] esp8266/makeimg.py: Store firmware size as last 4 bytes of
padding area.
---
esp8266/makeimg.py | 14 +++++++++-----
1 file changed, 9 insertions(+), 5 deletions(-)
diff --git a/esp8266/makeimg.py b/esp8266/makeimg.py
index e63f956bd..834f778c8 100644
--- a/esp8266/makeimg.py
+++ b/esp8266/makeimg.py
@@ -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))
+ with open(sys.argv[2], 'rb') as f:
+ data_rom = f.read()
+
pad = b'\xff' * (SEGS_MAX_SIZE - len(data_flash))
- fout.write(pad)
+ assert len(pad) >= 4
+ fout.write(pad[:-4])
+ fout.write(struct.pack("I", SEGS_MAX_SIZE + len(data_rom)))
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))
+ fout.write(data_rom)
+ print('irom0text', len(data_rom))
print('total ', SEGS_MAX_SIZE + len(data_rom))
--
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