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‎bslib.py

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import numpy as np
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from crcmod.predefined import mkPredefinedCrcFun
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crc16arc = mkPredefinedCrcFun('crc-16')
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def chunks(l, n):
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"""Yield successive n-sized chunks from l."""
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for i in range(0, len(l), n):
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yield l[i:i + n]
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def bytearr(frame):
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"array of all bytes of the frame"
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return bytearray([int(n, base=2) for n in chunks(frame.strip(), 8)])
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def crc(frame):
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bs = bytearr(frame)
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data = bs[-6:] + bs[:-8]
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crc = (bs[-7] << 8) + bs[-8]
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#print(data)
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return crc, crc16arc(data)
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def bitarr(frame):
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"Array of *content* bits"
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data = frame.strip()[4:-64]
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return [int(n, base=2) for n in data]
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def read_bitstream(fname):
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bitmap = []
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with open(fname) as inp:
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for line in inp:
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if line.startswith("//") or len(line) < 1000: continue
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crc1, crc2 = crc(line)
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#if crc1 != crc2: print(crc1, crc2)
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bitmap.append(bytearr(line)[:-8])
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return np.array(bitmap)
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‎display.py

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import sys
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from bslib import read_bitstream
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from PIL import Image
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arr = read_bitstream(sys.argv[1])
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if len(sys.argv) > 2:
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diff = read_bitstream(sys.argv[2])
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arr ^= diff
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size = (arr.shape[1]*8, arr.shape[0])
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print(size)
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im = Image.frombytes(mode='1', size=size, data=arr)
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#im.show()
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im.save("bitmap.png","PNG")

‎empty/device.cfg

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set JTAG regular_io = false
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set SSPI regular_io = false
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set MSPI regular_io = false
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set READY regular_io = false
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set DONE regular_io = false
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set RECONFIG_N regular_io = false
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set MODE regular_io = false
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set CRC_check = true
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set compress = false
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set encryption = false
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set security_bit_enable = true
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set bsram_init_fuse_print = true
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set download_speed = 250/100
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set spi_flash_address = 0x00FFF000
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set format = txt
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set background_programming = false
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set secure_mode = false

‎empty/empty.v

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module top();
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endmodule

‎empty/pnr.cfg

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-sdf
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-oc
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-ibs
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-posp
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-o
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-warning_all
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-timing

‎empty/run.tcl

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# gw_sh run.tcl
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add_file -vm empty.v
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add_file -cfg device.cfg
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set_option -device GW1NR-9-QFN88-6
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set_option -pn GW1NR-LV9QN88C6/I5
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run_pnr -opt pnr.cfg

‎indices.py

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import json
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import sys
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import numpy as np
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from bslib import read_bitstream
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arr = read_bitstream(sys.argv[1])
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diff = read_bitstream(sys.argv[2])
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arr ^= diff
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arr = np.unpackbits(arr, axis=1)
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indices = np.transpose(np.nonzero(arr)).astype(int)
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print(json.dumps(indices.tolist()))

‎json_display.py

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import sys
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import json
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import numpy as np
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from bslib import read_bitstream
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from PIL import Image
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image = np.zeros([712, 2840], dtype="byte")
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for fname in sys.argv[1:]:
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print(fname)
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with open(fname) as f:
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try:
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data = json.load(f)
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except json.decoder.JSONDecodeError:
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continue
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for x, y in data:
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image[x][y] += 1
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print(np.nonzero(image > 1))
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im = Image.frombytes(mode='1', size=image.shape[::-1], data=np.packbits(image))
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#im.show()
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im.save("bitmap.png","PNG")

‎lut4.sh

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function loop {
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cp -r lut4 lut4_$1
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cd lut4_$1
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for row in $1 $2
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do
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for col in {2..46}
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do
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for cls in {0..3}
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do
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for lut in A B
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do
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location="R${row}C${col}[${cls}][${lut}]"
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if [[ ! -f "../data/fs/$location.fs" ]]; then
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sed s/LOCATION/$location/ lut4.cst.mk > lut4.cst
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~/bin/gowin/IDE/bin/gw_sh run.tcl
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mv impl/pnr/lut4.fs ../data/fs/$location.fs
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fi
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if [[ ! -f "../data/bits/$location.json" ]]; then
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python ../indices.py ../empty.fs ../data/fs/$location.fs > ../data/bits/$location.json
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fi
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done
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done
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done
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done
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}
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set -x
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cd empty
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~/bin/gowin/IDE/bin/gw_sh run.tcl
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cd ..
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cp empty/impl/pnr/empty.fs .
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mkdir -p data/fs
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mkdir -p data/bits
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#R2C2
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#R27C46
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loop 2 3 &
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loop 4 5 &
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loop 6 7 &
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loop 8 9 &
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loop 10 11 &
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loop 12 13 &
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loop 14 15 &
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loop 16 17 &
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loop 18 19 &
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loop 20 21 &
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loop 22 23 &
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loop 24 25 &
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loop 26 27 &
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cd ..
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‎lut4/device.cfg

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set JTAG regular_io = false
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set SSPI regular_io = false
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set MSPI regular_io = false
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set READY regular_io = false
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set DONE regular_io = false
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set RECONFIG_N regular_io = false
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set MODE regular_io = false
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set CRC_check = true
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set compress = false
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set encryption = false
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set security_bit_enable = true
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set bsram_init_fuse_print = true
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set download_speed = 250/100
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set spi_flash_address = 0x00FFF000
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set format = txt
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set background_programming = false
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set secure_mode = false

‎lut4/lut4.cst.mk

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//Copyright (C)2014-2019 Gowin Semiconductor Corporation.
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//All rights reserved.
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//File Title: Physical Constraints file
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//GOWIN Version: V1.9.1.01Beta
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//Part Number: GW1NR-LV9QN88C6/I5
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//Created Time: Mon Sep 9 11:16:22 2019
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INS_LOC "mylut" LOCATION;

‎lut4/lut4.sdc

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//Copyright (C)2014-2019 GOWIN Semiconductor Corporation.
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//All rights reserved.
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//File Title: Timing Constraints file
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//GOWIN Version: 1.9.1.01 Beta
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//Created Time: 2019-08-06 14:29:38
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create_clock -name clock -period 10 -waveform {0 5} [get_ports {clk}]

‎lut4/lut4.v

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module top();
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wire gen_000_;
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wire gen_001_;
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wire gen_002_;
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wire gen_003_;
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wire gen_004_;
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LUT4 mylut (
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.F(gen_000_),
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.I0(gen_001_),
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.I1(gen_002_),
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.I2(gen_003_),
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.I3(gen_004_ )
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);
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defparam mylut.INIT = 16'h0000;
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endmodule

‎lut4/pnr.cfg

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-sdf
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-oc
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-ibs
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-posp
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-o
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-warning_all
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-timing

‎lut4/run.tcl

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# gw_sh run.tcl
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add_file -cst lut4.cst
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add_file -sdc lut4.sdc
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add_file -vm lut4.v
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add_file -cfg device.cfg
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set_option -device GW1NR-9-QFN88-6
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set_option -pn GW1NR-LV9QN88C6/I5
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run_pnr -opt pnr.cfg

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