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#!/usr/bin/env python3
"""
This script reads the output from Lattice's bstool in "test" mode, which should be invoked thus:
```
bstool -t bitstream.bit > bitstream.test
```
and from it obtains a list of tiles with the following information:
- Tile name (with position encoded in the name)
- Tile type
- Frame and bit offset
- Bitstream size in bits ("rows") and frames ("cols")
- Sites contained within the tile, and their nominal location
and creates a JSON file as output
"""
import sys, re
import json, argparse
tile_re = re.compile(
r'^Tile\s+([A-Z0-9a-z_/]+)\s+\((\d+), (\d+)\)\s+bitmap offset\s+\((\d+), (\d+)\)\s+\<([A-Z0-9a-z_/]+)>\s*$')
site_re = re.compile(
r'^\s+([A-Z0-9_]+) \((-?\d+), (-?\d+)\)')
parser = argparse.ArgumentParser(description=__doc__)
parser.add_argument('-m', action="store_true",
help="Use MachXO2 family layout")
parser.add_argument('infile', type=argparse.FileType('r'),
help="input file from bstool")
parser.add_argument('outfile', type=argparse.FileType('w'),
help="output JSON file")
def main(argv):
args = parser.parse_args(argv[1:])
tiles = {}
current_tile = None
for line in args.infile:
tile_m = tile_re.match(line)
if tile_m:
name = tile_m.group(6)
if args.m:
current_tile = {
"type": tile_m.group(1),
"start_bit": int(tile_m.group(5)),
"start_frame": int(tile_m.group(4)),
"rows": int(tile_m.group(3)),
"cols": int(tile_m.group(2)),
"sites": []
}
else:
current_tile = {
"type": tile_m.group(1),
"start_bit": int(tile_m.group(4)),
"start_frame": int(tile_m.group(5)),
"rows": int(tile_m.group(2)),
"cols": int(tile_m.group(3)),
"sites": []
}
identifier = name + ":" + tile_m.group(1)
assert identifier not in tiles
tiles[identifier] = current_tile
else:
site_m = site_re.match(line)
if site_m and current_tile is not None:
current_tile["sites"].append({
"name": site_m.group(1),
"pos_row": site_m.group(2),
"pos_col": site_m.group(3)
})
json.dump(tiles, args.outfile, sort_keys=True, indent=4)
if __name__ == "__main__":
main(sys.argv)
|
