litex/misoc/tools/mkmscimg.py

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#!/usr/bin/env python3
import argparse
import binascii
def insert_crc(i_filename, fbi_mode=False, o_filename=None):
if o_filename is None:
o_filename = i_filename
with open(i_filename, "rb") as f:
fdata = f.read()
fcrc = binascii.crc32(fdata).to_bytes(4, byteorder="big")
flength = len(fdata).to_bytes(4, byteorder="big")
with open(o_filename, "wb") as f:
if fbi_mode:
f.write(flength)
f.write(fcrc)
f.write(fdata)
else:
f.write(fdata)
f.write(fcrc)
def main():
parser = argparse.ArgumentParser(description="CRC32 computation tool and MiSoC image file writer.")
parser.add_argument("input", help="input file")
parser.add_argument("-o", "--output", default=None, help="output file (if not specified, use input file)")
parser.add_argument("-f", "--fbi", default=False, action="store_true", help="build flash boot image (FBI) file")
args = parser.parse_args()
insert_crc(args.input, args.fbi, args.output)
if __name__ == "__main__":
main()