OSS CAD Suite

Introduction

OSS CAD Suite is software distribution for number of open source software used in digital logic design. You will find tools for RTL synthesis, formal hardware verification, place & route, FPGA programming, testing with support for HDL like Verilog, Migen and nMigen.

OSS CAD Suite is a component of YosysHQ's Tabby CAD Suite:

See Tabby CAD Datasheet for details on Tabby CAD Suite; see OSS CAD Suite GitHub (this page) for details on OSS CAD Suite.

RTL Synthesis

• Yosys RTL synthesis with extensive Verilog 2005 support
• Amaranth refreshed Python toolbox for building complex digital hardware
• Migen Python toolbox for building complex digital hardware
• ABC A System for Sequential Synthesis and Verification

Did you know that the Tabby CAD version of yosys supports industry standard SystemVerilog, VHDL and SVA? Contact us at contact@yosyshq.com to arrange a free evaluation license.

Formal Tools

• sby a front-end driver program for Yosys-based formal hardware verification flows.
• mcy Mutation Cover with Yosys
• sby-gui GUI for SymbiYosys
• avy Interpolating Property Directed Reachability tool
• Boolector SMT solver and BTOR model checker
• Yices 2 SMT solver
• Super prove ABC-based AIGER hardware model checker
• Pono an SMT-based model checker built on smt-switch
• Z3 SMT solver
• Bitwuzla SMT solver

PnR

• nextpnr a portable FPGA place and route tool (generic, ice40, ecp5, machxo2, nexus)
• Project IceStorm tools for working with Lattice ICE40 bitstreams
• Project Trellis tools for working with Lattice ECP5 bitstreams
• Project Oxide tools for working with Lattice Nexus bitstreams

FPGA board programming tools

• openFPGALoader universal utility for programming FPGA
• dfu-util Device Firmware Upgrade Utilities
• ecpprog basic driver for FTDI based JTAG probes, to program ECP5 FPGAs
• ecpdap program ECP5 FPGAs and attached SPI flash using CMSIS-DAP probes in JTAG mode
• fujprog ULX2S / ULX3S JTAG programmer
• openocd Open On-Chip Debugger
• icesprog iCESugar FPGA board programmer
• TinyFPGA USB Bootloader
• TinyFPGA-B TinyFPGA B2 Board programmer
• iceFUN iceFUN Programmer

Simulation/Testing

• GTK Wave fully featured GTK+ based wave viewer
• verilator Verilog/SystemVerilog simulator
• iverilog Verilog compilation system

Support libraries

• Python 3 language interpretter is provided in all supported platforms.
• Python 2 language interpretter is provided in Linux platforms in form of library only.
• Ubuntu 20.04 distribution development packages are used and shared libraries used are provided in package.
• macports distribution system for macOS is used to obtain all libraries used, and they are provided in package.
• MinGW Minimalist GNU for Windows library packages from Fedora 32 are used in compilation and provided in package.

Installation

1. Download an archive matching your OS from the releases page.
2. Extract the archive to a location of your choice (for Windows it is recommended that path does not contain spaces)
3. To use OSS CAD Suite

Linux and macOS

export PATH="<extracted_location>/oss-cad-suite/bin:$PATH"

or

source <extracted_location>/oss-cad-suite/environment

Windows

from existing shell:
<extracted_location>\oss-cad-suite\environment.bat

to create new shell window:
<extracted_location>\oss-cad-suite\start.bat

NOTE: when environment is set, python3 from package becomes available as well, this enables usage of nMigen and nMigen HDL and LiteX libraries scripts as usual, when OSS CAD Suite is just added in PATH to use packaged python3 use tabbypy3 to start python environment. For Windows, there are no wrappers and using environment.bat is only choice.

Using LiteX

We provide you with Python 3.8 and all required software to be able to use LiteX. After activating environment it is possible to perform installation same as usual:

mkdir -p litex
cd litex
wget https://raw.githubusercontent.com/enjoy-digital/litex/master/litex_setup.py
python3 litex_setup.py init
python3 litex_setup.py install

Supported architectures

linux-x64

Any personal Linux based computer should just work, no additional packages are needed to be installed on system to make OSS CAD Suite working. Distributed libraries are based on Ubuntu 20.04, but everything is packaged in such a way so it can be used on any Linux distribution.

darwin-x64

Any macOS 10.14 or later with Intel CPU should use this distribution package.

windows-x64

This architecture is supported for Windows 10, but older 64-bit version of Windows 7, 8 or 8.1 should work.

linux-arm

ARM based Linux devices such as Raspberry Pi 3, 4 or 400 can use this distribution package.

linux-arm64

ARM64 based Linux devices using 64bit CPU as in Raspberry Pi 4 and 400 (with 64bit version of OS installed), and also laptops as MNT Reform 2 can use this distribution package.

linux-riscv64

RiscV-64 based Linux devices should use this distribtuion package, but please note that this is currently untested

Contributing

To be able to build OSS CAD Suite yourself need to install docker and python 3.6 or higher, with click library.

After that just running ./builder.py should work fine.

To build default build:

./builder.py build 

To skip update of source code you can always:

./builder.py build --no-update

To build specific target and architecture:

./builder.py build --target=yosys --arch=linux-arm64