63 lines
1.6 KiB
Python
Executable File
63 lines
1.6 KiB
Python
Executable File
#!/usr/bin/python
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import sys
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import os
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import struct
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def flip32(data):
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sl = struct.Struct('<I')
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sb = struct.Struct('>I')
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b = buffer(data)
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d = bytearray(len(data))
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for offset in xrange(0, len(data), 4):
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sb.pack_into(d, offset, sl.unpack_from(b, offset)[0])
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return d
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import argparse
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parser = argparse.ArgumentParser(description='Convert FPGA bit files to raw bin format suitable for flashing')
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parser.add_argument('-f', '--flip', dest='flip', action='store_true', default=False, help='Flip 32-bit endianess (needed for Zynq)')
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parser.add_argument("bitfile", help="Input bit file name")
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parser.add_argument("binfile", help="Output bin file name")
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args = parser.parse_args()
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short = struct.Struct('>H')
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ulong = struct.Struct('>I')
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bitfile = open(args.bitfile, 'rb')
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l = short.unpack(bitfile.read(2))[0]
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if l != 9:
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raise Exception, "Missing <0009> header (0x%x), not a bit file" % l
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bitfile.read(l)
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l = short.unpack(bitfile.read(2))[0]
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d = bitfile.read(l)
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if d != 'a':
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raise Exception, "Missing <a> header, not a bit file"
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l = short.unpack(bitfile.read(2))[0]
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d = bitfile.read(l)
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print "Design name:", d
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KEYNAMES = {'b': "Partname", 'c': "Date", 'd': "Time"}
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while 1:
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k = bitfile.read(1)
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if not k:
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raise Exception, "unexpected EOF"
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elif k == 'e':
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l = ulong.unpack(bitfile.read(4))[0]
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print "found binary data:", l
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d = bitfile.read(l)
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if args.flip:
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d = flip32(d)
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open(args.binfile, 'wb').write(d)
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break
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elif k in KEYNAMES:
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l = short.unpack(bitfile.read(2))[0]
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d = bitfile.read(l)
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print KEYNAMES[k], d
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else:
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print "Unexpected key: ", k
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l = short.unpack(bitfile.read(2))[0]
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d = bitfile.read(l)
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