Since May 2022, packages providing Architecture Definition assets do not include CLI utilities/wrappers to interact with Yosys, Verilog-to-Routing, etc. For backwards compatibility, end-users can install Python package f4pga from gh:chipsalliance/f4pga. For instance: pip install


  • Project X-Ray provides information required by open source toolchains for Xilinx’s 7-Series FPGA Architecture.

  • Project Trellis enables an open-source flow for Lattice’s ECP5 FPGAs, providing the device database and tools for bitstream creation.

  • Project IceStorm is a bitstream documentation project targeting Lattice’s iCE40 FPGAs.