mirror of https://github.com/openXC7/prjxray.git
95 lines
3.2 KiB
Python
95 lines
3.2 KiB
Python
#!/usr/bin/env python3
|
|
# -*- coding: utf-8 -*-
|
|
#
|
|
# Copyright (C) 2017-2022 The Project X-Ray Authors.
|
|
#
|
|
# Use of this source code is governed by a ISC-style
|
|
# license that can be found in the LICENSE file or at
|
|
# https://opensource.org/licenses/ISC
|
|
#
|
|
# SPDX-License-Identifier: ISC
|
|
"""
|
|
SING-row sibling of 030-iob18. Tags the basic IOB18 config (IN_USE / OUT / IN /
|
|
IN_ONLY / IN_DIFF / PULLTYPE / DRIVE / SLEW / STEPDOWN) for the single IOB18
|
|
site in each *_SING tile, per the OBUF / IBUF / unused type chosen in top.py.
|
|
|
|
Reuses 030-iob18's drive_opts / enum-zero convention so the merged feature
|
|
names (after process_rdb.py) match nextpnr, e.g.
|
|
LVCMOS15_LVCMOS18.DRIVE.I12_I16_I2_I4_I6_I8. Single-ended only.
|
|
"""
|
|
from prjxray.segmaker import Segmaker
|
|
from prjxray import segmaker
|
|
from prjxray import verilog
|
|
import json
|
|
|
|
LVCMOS = ['LVCMOS12', 'LVCMOS15', 'LVCMOS18']
|
|
|
|
|
|
def bitfilter(frame, word):
|
|
# SING tile frames differ from regular LIOB18; let segmatch find them.
|
|
return True
|
|
|
|
|
|
def mk_drive_opt(iostandard, drive):
|
|
if drive is None:
|
|
drive = '_FIXED'
|
|
return '{}.DRIVE.I{}'.format(iostandard, drive)
|
|
|
|
|
|
def main():
|
|
print("Loading tags")
|
|
segmk = Segmaker("design.bits")
|
|
|
|
with open('params.jl', 'r') as f:
|
|
design = json.load(f)
|
|
|
|
for d in design:
|
|
site = d['site']
|
|
iostandard = verilog.unquote(d['IOSTANDARD'])
|
|
typ = d['type'] # 'OBUF', 'IBUF', or None (unused)
|
|
|
|
in_use = 1 if typ is not None else 0
|
|
is_out = 1 if typ == 'OBUF' else 0
|
|
is_in = 1 if typ == 'IBUF' else 0
|
|
|
|
segmk.add_site_tag(site, 'INOUT', 0)
|
|
segmk.add_site_tag(site, '{}.IN_USE'.format(iostandard), in_use)
|
|
segmk.add_site_tag(site, '{}.OUT'.format(iostandard), is_out)
|
|
segmk.add_site_tag(site, '{}.IN'.format(iostandard), is_in)
|
|
segmk.add_site_tag(site, '{}.IN_ONLY'.format(iostandard), is_in)
|
|
segmk.add_site_tag(site, '{}.IN_DIFF'.format(iostandard), 0)
|
|
|
|
# PULLTYPE applies whenever the IOB is in use.
|
|
if in_use:
|
|
segmaker.add_site_group_zero(
|
|
segmk, site, "PULLTYPE.",
|
|
("NONE", "KEEPER", "PULLDOWN", "PULLUP"), "PULLDOWN",
|
|
verilog.unquote(d['PULLTYPE']))
|
|
|
|
# DRIVE / SLEW / STEPDOWN only meaningful for output buffers.
|
|
if typ == 'OBUF':
|
|
drive_opts = set()
|
|
for opt in LVCMOS:
|
|
for drive_opt in ("2", "4", "6", "8", "12", "16"):
|
|
if drive_opt in ["12", "16"] and opt == "LVCMOS12":
|
|
continue
|
|
drive_opts.add(mk_drive_opt(opt, drive_opt))
|
|
segmaker.add_site_group_zero(
|
|
segmk, site, '', drive_opts, mk_drive_opt('LVCMOS25', '12'),
|
|
mk_drive_opt(iostandard, d['DRIVE']))
|
|
|
|
if d['SLEW']:
|
|
for opt in ["SLOW", "FAST"]:
|
|
segmk.add_site_tag(
|
|
site, iostandard + ".SLEW." + opt,
|
|
opt == verilog.unquote(d['SLEW']))
|
|
|
|
segmk.add_site_tag(site, '{}.STEPDOWN'.format(iostandard), 1)
|
|
|
|
segmk.compile(bitfilter=bitfilter)
|
|
segmk.write(allow_empty=True)
|
|
|
|
|
|
if __name__ == "__main__":
|
|
main()
|