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waf: added crc to embedded data

This commit is contained in:
Andrew Tridgell 2021-02-23 13:56:09 +11:00
parent f7098c1635
commit b012c472e1
1 changed files with 12 additions and 1 deletions
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13
Tools/ardupilotwaf/embed.py
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@ -62,6 +62,16 @@ def embed_file(out, f, idx, embedded_name, uncompressed):
write_encode(out, '};\n\n');
return True
def crc32(bytes, crc=0):
'''crc32 equivalent to crc32_small() from AP_Math/crc.cpp'''
for byte in bytes:
crc ^= byte
for i in range(8):
mask = (-(crc & 1)) & 0xFFFFFFFF
crc >>= 1
crc ^= (0xEDB88320 & mask)
return crc
def create_embedded_h(filename, files, uncompressed=False):
'''create a ap_romfs_embedded.h file'''
@ -85,7 +95,8 @@ def create_embedded_h(filename, files, uncompressed=False):
else:
ustr = ''
print("Embedding file %s:%s%s" % (name, filename, ustr))
write_encode(out, '{ "%s", sizeof(ap_romfs_%u), ap_romfs_%u },\n' % (name, i, i))
crc = crc32(bytearray(open(filename,'rb').read()))
write_encode(out, '{ "%s", sizeof(ap_romfs_%u), 0x%08x, ap_romfs_%u },\n' % (name, i, crc, i))
write_encode(out, '};\n')
out.close()
return True