arachne-pnr1

Usage

Overview

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>.