Hardcaml is an OCaml library for designing and testing hardware designs.

• Express hardware designs in OCaml
• Make generic designs using higher order functions, lists, maps, functors...
• Simulate designs in OCaml
• Convert to (hierarchical) Verilog or VHDL
• Write new modules to transform or analyse circuits, or provide new backends

$ opam install hardcaml ppx_deriving_hardcaml hardcaml_waveterm

• Manual
• API Docs

• Hardcaml_waveterm - ASCII based digital waveforms. Usable in expect tests or from an interactive terminal application.
• Hardcaml_c - convert Hardcaml designs to C-based simulation models. Provides an API compatible with the standard Cyclesim module. Trades compilation time for runtime performance.
• Hardcaml_verilator - Convert Hardcaml designs to very high speed simulation model using the open source Verilator compiler.
• Hardcaml_step_testbench - Monadic testbench API. Control multiple tasks synchronized to a clock without converting to a statemachine coding style.

• Hardcaml_circuits - A library of useful/interesting Hardcaml designs
• Hardcaml_fixed_point - Fixed point arithmetic with rounding and overflow control
• Hardcaml_xilinx - Various Xilinx primitives wrapped with Hardcaml interfaces and simulation models
• Hardcaml_xilinx_components - Tool to read Xilinx unisim and xpm component definitions and generate Hardcaml interfaces

• Hardcaml_of_verilog - Convert a verilog design to Hardcaml using Yosys
• Hardcaml_verify - SAT based formal verification tools for Hardcaml
• hardcaml_mips - A simple 5-stage MIPs CPU with associated blog detailing the development process.
• hardcaml_arty - Infrastructure targetting the Arty A7 board.