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waf: pad bootloader to multiple of 32 bytes

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this ensures that we can write a whole flash line when updating
bootloader from ROMFS
This commit is contained in:
Andrew Tridgell 2019-02-17 12:29:14 +11:00
parent 1d6c877c3c
commit e5efbffe5b
1 changed files with 13 additions and 2 deletions
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15
Tools/ardupilotwaf/embed.py
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@ -12,13 +12,24 @@ import os, sys, tempfile, gzip
def write_encode(out, s):
out.write(s.encode())
def embed_file(out, f, idx):
def embed_file(out, f, idx, embedded_name):
'''embed one file'''
try:
contents = open(f,'rb').read()
except Exception:
print("Failed to embed %s" % f)
return False
pad = 0
if embedded_name.endswith("bootloader.bin"):
# round size to a multiple of 32 bytes for bootloader, this ensures
# it can be flashed on a STM32H7 chip
blen = len(contents)
pad = (32 - (blen % 32)) % 32
if pad != 0:
contents += bytes([0xff]*pad)
print("Padded %u bytes for %s" % (pad, embedded_name))
write_encode(out, 'static const uint8_t ap_romfs_%u[] = {' % idx)
# compress it
@ -45,7 +56,7 @@ def create_embedded_h(filename, files):
for i in range(len(files)):
(name, filename) = files[i]
if not embed_file(out, filename, i):
if not embed_file(out, filename, i, name):
return False
write_encode(out, '''const AP_ROMFS::embedded_file AP_ROMFS::files[] = {\n''')