NAME

       arachne-pnr - Place and route tool for iCE40 family FGPAs

SYNOPSIS

       arachne-pnr [options] <filename>

DESCRIPTION

       Arachne-pnr  implements  the  place and route step of the hardware compilation process for
       FPGAs. It accepts as input a technology-mapped netlist in BLIF format, as  output  by  the
       Yosys  synthesis  suite  for example. It currently targets the Lattice Semiconductor iCE40
       family of FPGAs. Its output is a textual bitstream  representation  for  assembly  by  the
       IceStorm  icepack  command.   The  output  of  icepack  is a binary bitstream which can be
       uploaded to a hardware device.

OPTIONS

       -h, --help
              Print this usage message.

       -q, --quiet
              Run quiet.  Don't output progress messages.

       -d <device>, --device <device>
              Target device <device>.  Supported devices: 1k - Lattice Semiconductor iCE40LP/HX1K
              8k - Lattice Semiconductor iCE40LP/HX8K Default: 1k

       -c <file>, --chipdb <chipdb-file>
              Read    chip    database    from   <chipdb-file>.    Default:   /usr/share/arachne-
              pnr/chipdb-<device>.bin

       --write-binary-chipdb <file>
              Write binary chipdb to <file>.

       -l, --no-promote-globals
              Don't promote nets to globals.

       -B <file>, --post-pack-blif <file>
              Write post-pack netlist to <file> as BLIF.

       -V <file>, --post-pack-verilog <file>
              Write post-pack netlist to <file> as Verilog.

       --post-place-blif <file>
              Write post-place netlist to <file> as BLIF.

       --route-only
              Input must include placement.

       -p <pcf-file>, --pcf-file <pcf-file>
              Read physical constraints from <pcf-file>.

       -P <package>, --package <package>
              Target package <package>.  Default: tq144 for 1k, ct256 for 8k

       -r     Randomize seed.

       -m <int>, --max-passes <int>
              Maximum number of routing passes.  Default: 200

       -s <int>, --seed <int>
              Set seed for random generator to <int>.  Default: 1

       -w <pcf-file>, --write-pcf <pcf-file>
              Write pin assignments to <pcf-file> after placement.

       -o <output-file>, --output-file <output-file>
              Write output to <output-file>.

AUTHOR

       This manual page was written by Ruben Undheim  <ruben.undheim@gmail.com>  for  the  Debian
       project (and may be used by others).

                                         15 February 2021                          ARACHNE-PNR(1)