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43c4c002 TS |
1 | #!/usr/bin/python3 |
2 | ## | |
3 | ## This file is part of the sigrok-util project. | |
4 | ## | |
5 | ## Copyright (C) 2015 Tilman Sauerbeck <tilman@code-monkey.de> | |
6 | ## | |
7 | ## This program is free software; you can redistribute it and/or modify | |
8 | ## it under the terms of the GNU General Public License as published by | |
9 | ## the Free Software Foundation; either version 3 of the License, or | |
10 | ## (at your option) any later version. | |
11 | ## | |
12 | ## This program is distributed in the hope that it will be useful, | |
13 | ## but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | ## GNU General Public License for more details. | |
16 | ## | |
17 | ## You should have received a copy of the GNU General Public License | |
18 | ## along with this program; if not, see <http://www.gnu.org/licenses/>. | |
19 | ## | |
20 | ||
21 | import sys | |
22 | ||
23 | def reverse_bits8(x): | |
24 | ''' | |
25 | Reverses the bits in the given byte. | |
26 | ''' | |
27 | x = (x & 0x55) << 1 | (x & 0xaa) >> 1 | |
28 | x = (x & 0x33) << 2 | (x & 0xcc) >> 2 | |
29 | x = (x & 0x0f) << 4 | (x & 0xf0) >> 4 | |
30 | ||
31 | return x | |
32 | ||
33 | def main(): | |
34 | with open(sys.argv[1], 'rb') as f: | |
35 | data = f.read() | |
36 | ||
37 | ident = 'FPGA_BINS' | |
38 | ||
39 | firmware_offset = data.index(ident.encode(encoding = 'UTF-16-LE')) | |
40 | firmware_offset += len(ident) * 2 | |
41 | ||
42 | bitstream_size = 464196 | |
43 | ||
44 | blobs = [ | |
45 | ('lecroy-logicstudio16-16.bitstream', 0), | |
46 | ('lecroy-logicstudio16-8.bitstream', bitstream_size) | |
47 | ] | |
48 | ||
49 | for (blob_name, blob_offset) in blobs: | |
50 | out_bytes = bytearray() | |
51 | ||
52 | for u in range(blob_offset, blob_offset + bitstream_size): | |
53 | inb = data[firmware_offset + u] | |
54 | outb = reverse_bits8(inb) | |
55 | out_bytes.append(outb) | |
56 | ||
57 | with open(blob_name, 'wb') as f: | |
58 | f.write(out_bytes) | |
59 | ||
60 | print('Wrote {}'.format(blob_name)) | |
61 | main() |