forked from M-Labs/artiq
bit2bin: cleanup
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76ddb063cf
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4880e4225d
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@ -17,38 +17,39 @@ def flip32(data):
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def bit2bin(bit, bin, flip=False):
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with open(bit, "rb") as bitfile:
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l, = struct.unpack(">H", bitfile.read(2))
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if l != 9:
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raise ValueError("Missing <0009> header, not a bit file")
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l, = struct.unpack(">H", bit.read(2))
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if l != 9:
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raise ValueError("Missing <0009> header, not a bit file")
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_ = bit.read(l) # unknown data
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l, = struct.unpack(">H", bit.read(2))
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if l != 1:
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raise ValueError("Missing <0001> header, not a bit file")
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bitfile.read(l)
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d = bitfile.read(*struct.unpack(">H", bitfile.read(2)))
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if d != b"a":
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raise ValueError("Missing <a> header, not a bit file")
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d = bitfile.read(*struct.unpack(">H", bitfile.read(2)))
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print("Design name:", d)
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while True:
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key = bitfile.read(1)
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if not key:
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break
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if key in b"bcd":
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d = bitfile.read(*struct.unpack(">H", bitfile.read(2)))
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name = {b"b": "Partname", b"c": "Date", b"d": "Time"}[key]
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print(name, d)
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elif key == b"e":
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l, = struct.unpack(">I", bitfile.read(4))
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print("found binary data length:", l)
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d = bitfile.read(l)
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if flip:
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d = flip32(d)
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with open(bin, "wb") as f:
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f.write(d)
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else:
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d = bitfile.read(*struct.unpack(">H", bitfile.read(2)))
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print("Unexpected key: ", key, d)
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while True:
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key = bit.read(1).decode()
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if not key:
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break
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if key in "abcd":
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d = bit.read(*struct.unpack(">H", bit.read(2)))
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assert d.endswith(b"\x00")
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d = d.decode()
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name = {
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"a": "Design",
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"b": "Part name",
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"c": "Date",
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"d": "Time"
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}[key]
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print("{}: {}".format(name, d))
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elif key == "e":
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l, = struct.unpack(">I", bit.read(4))
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print("Bitstream payload length: {:#x}".format(l))
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d = bit.read(l)
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if flip:
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d = flip32(d)
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bin.write(d)
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else:
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d = bit.read(*struct.unpack(">H", bit.read(2)))
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print("Unexpected key: {}: {}".format(key, d))
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if __name__ == "__main__":
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@ -64,4 +65,5 @@ if __name__ == "__main__":
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help="Output bin file name")
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args = parser.parse_args()
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bit2bin(args.bitfile, args.binfile, args.flip)
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with open(args.bitfile, "rb") as f, open(args.binfile, "wb") as g:
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bit2bin(f, g, args.flip)
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