47 lines
1.1 KiB
Plaintext
47 lines
1.1 KiB
Plaintext
|
#!/usr/bin/env python3
|
||
|
|
import argparse
|
||
|
|
import struct
|
||
|
|
import os, sys
|
||
|
|
|
||
|
|
from lib.dump import DUMP_MAGIC, DUMP_OFFSET, DUMP_SIZE
|
||
|
|
|
||
|
|
|
||
|
|
def error(msg):
|
||
|
|
print(msg, file=sys.stderr)
|
||
|
|
|
||
|
|
def main():
|
||
|
|
# parse the arguments
|
||
|
|
ap = argparse.ArgumentParser(description="""
|
||
|
|
Extract a crash dump from an external flash image and output
|
||
|
|
the same format produced by the D21 g-code.
|
||
|
|
""")
|
||
|
|
ap.add_argument('image')
|
||
|
|
args = ap.parse_args()
|
||
|
|
|
||
|
|
# read the image
|
||
|
|
off = DUMP_OFFSET
|
||
|
|
with open(args.image, 'rb') as fd:
|
||
|
|
fd.seek(off)
|
||
|
|
data = fd.read(DUMP_SIZE)
|
||
|
|
if len(data) != DUMP_SIZE:
|
||
|
|
error('incorrect image size')
|
||
|
|
return os.EX_DATAERR
|
||
|
|
|
||
|
|
# check for magic header
|
||
|
|
magic, = struct.unpack('<L', data[:4])
|
||
|
|
if magic != DUMP_MAGIC:
|
||
|
|
error('invalid dump magic or no dump')
|
||
|
|
return os.EX_DATAERR
|
||
|
|
|
||
|
|
# output D21 dump
|
||
|
|
print('D21 - read crash dump', end='')
|
||
|
|
for i in range(len(data)):
|
||
|
|
if i % 16 == 0:
|
||
|
|
print('\n{:06x} '.format(off + i), end='')
|
||
|
|
print(' {:02x}'.format(data[i]), end='')
|
||
|
|
print('\nok')
|
||
|
|
|
||
|
|
|
||
|
|
if __name__ == '__main__':
|
||
|
|
exit(main())
|