.\" DO NOT MODIFY THIS FILE!  It was generated by help2man 1.47.16.
.TH NEXTPNR-ICE40 "1" "January 2021" "nextpnr-ice40 0.0~git20210102.9b96280-1" "General Commands"
.SH NAME
nextpnr-ice40 \- Next Generation Place and Route
.SH DESCRIPTION
nextpnr\-ice40 \fB\-\-\fR Next Generation Place and Route (Version 0.0~git20210102.9b96280\-1)
.SS "General options:"
.TP
\fB\-h\fR [ \fB\-\-help\fR ]
show help
.TP
\fB\-v\fR [ \fB\-\-verbose\fR ]
verbose output
.TP
\fB\-q\fR [ \fB\-\-quiet\fR ]
quiet mode, only errors and warnings
displayed
.TP
\fB\-l\fR [ \fB\-\-log\fR ] arg
log file, all log messages are written to
this file regardless of \fB\-q\fR
.TP
\fB\-\-debug\fR
debug output
.TP
\fB\-f\fR [ \fB\-\-force\fR ]
keep running after errors
.TP
\fB\-\-gui\fR
start gui
.TP
\fB\-\-gui\-no\-aa\fR
disable anti aliasing (use together with
\fB\-\-gui\fR option)
.TP
\fB\-\-run\fR arg
python file to execute instead of default
flow
.TP
\fB\-\-pre\-pack\fR arg
python file to run before packing
.TP
\fB\-\-pre\-place\fR arg
python file to run before placement
.TP
\fB\-\-pre\-route\fR arg
python file to run before routing
.TP
\fB\-\-post\-route\fR arg
python file to run after routing
.TP
\fB\-\-json\fR arg
JSON design file to ingest
.TP
\fB\-\-write\fR arg
JSON design file to write
.TP
\fB\-\-top\fR arg
name of top module
.TP
\fB\-\-seed\fR arg
seed value for random number generator
.TP
\fB\-r\fR [ \fB\-\-randomize\-seed\fR ]
randomize seed value for random number
generator
.TP
\fB\-\-placer\fR arg
placer algorithm to use; available: sa,
heap; default: heap
.TP
\fB\-\-router\fR arg
router algorithm to use; available:
router1, router2; default: router1
.TP
\fB\-\-slack_redist_iter\fR arg
number of iterations between slack
redistribution
.TP
\fB\-\-cstrweight\fR arg
placer weighting for relative constraint
satisfaction
.TP
\fB\-\-starttemp\fR arg
placer SA start temperature
.TP
\fB\-\-placer\-budgets\fR
use budget rather than criticality in
placer timing weights
.TP
\fB\-\-pack\-only\fR
pack design only without placement or
routing
.TP
\fB\-\-no\-route\fR
process design without routing
.TP
\fB\-\-no\-place\fR
process design without placement
.TP
\fB\-\-no\-pack\fR
process design without packing
.TP
\fB\-\-ignore\-loops\fR
ignore combinational loops in timing
analysis
.TP
\fB\-V\fR [ \fB\-\-version\fR ]
show version
.TP
\fB\-\-test\fR
check architecture database integrity
.TP
\fB\-\-freq\fR arg
set target frequency for design in MHz
.TP
\fB\-\-timing\-allow\-fail\fR
allow timing to fail in design
.TP
\fB\-\-no\-tmdriv\fR
disable timing\-driven placement
.TP
\fB\-\-sdf\fR arg
SDF delay back\-annotation file to write
.TP
\fB\-\-sdf\-cvc\fR
enable tweaks for SDF file compatibility
with the CVC simulator
.TP
\fB\-\-no\-print\-critical\-path\-source\fR
disable printing of the line numbers
associated with each net in the critical
path
.TP
\fB\-\-placed\-svg\fR arg
write render of placement to SVG file
.TP
\fB\-\-routed\-svg\fR arg
write render of routing to SVG file
.SS "Architecture specific options:"
.TP
\fB\-\-lp384\fR
set device type to iCE40LP384
.TP
\fB\-\-lp1k\fR
set device type to iCE40LP1K
.TP
\fB\-\-lp4k\fR
set device type to iCE40LP4K
.TP
\fB\-\-lp8k\fR
set device type to iCE40LP8K
.TP
\fB\-\-hx1k\fR
set device type to iCE40HX1K
.TP
\fB\-\-hx4k\fR
set device type to iCE40HX4K
.TP
\fB\-\-hx8k\fR
set device type to iCE40HX8K
.TP
\fB\-\-up3k\fR
set device type to iCE40UP3K
.TP
\fB\-\-up5k\fR
set device type to iCE40UP5K
.TP
\fB\-\-u1k\fR
set device type to iCE5LP1K
.TP
\fB\-\-u2k\fR
set device type to iCE5LP2K
.TP
\fB\-\-u4k\fR
set device type to iCE5LP4K
.TP
\fB\-\-package\fR arg
set device package
.TP
\fB\-\-pcf\fR arg
PCF constraints file to ingest
.TP
\fB\-\-asc\fR arg
asc bitstream file to write
.TP
\fB\-\-read\fR arg
asc bitstream file to read
.TP
\fB\-\-promote\-logic\fR
enable promotion of 'logic' globals (in
addition to clk/ce/sr by default)
.TP
\fB\-\-no\-promote\-globals\fR
disable all global promotion
.TP
\fB\-\-opt\-timing\fR
run post\-placement timing optimisation pass
(experimental)
.TP
\fB\-\-tmfuzz\fR
run path delay estimate fuzzer
.TP
\fB\-\-pcf\-allow\-unconstrained\fR
don't require PCF to constrain all IO