5 files changed, 145 insertions(+), 0 deletions(-)

A .envrc
A .gitignore
A flake.lock
A flake.nix
A run.py

@@ 1,1 @@
+use flake

@@ 1,12 @@
+.DS_Store
+.idea
+*.log
+tmp/
+
+work/
+out/
+sim/
+.direnv/
+
+__pycache__/
+vunit_out/

@@ 1,27 @@
+{
+  "nodes": {
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1707588924,
+        "narHash": "sha256-0e1ce6X5ghapv6cAF9rxLZKeNyFHHXsLbGxN2cQQE8U=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "10b813040df67c4039086db0f6eaf65c536886c6",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixpkgs-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "nixpkgs": "nixpkgs"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

@@ 1,88 @@
+{
+  description = "FIR filter in VHDL";
+
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
+  };
+
+  outputs = { self, nixpkgs }:
+    let
+      system = "x86_64-linux";
+      pkgs = import nixpkgs {
+        system = "${system}";
+      };
+
+      python-env = pkgs.python311.withPackages(ps: [
+        (ps.buildPythonPackage rec {
+          pname = "vunit-hdl";
+          version = "4.7.0";
+          src = pkgs.fetchFromGitHub {
+            owner = "VUnit";
+            repo = "vunit";
+            rev = "v4.7.0";
+            hash = "sha256-xhCPPnUXUdLg5kElbyJKW0tJOZMUoM1bV2siOsoz3Zs=";
+          };
+
+          doCheck = false;
+
+          nativeBuildInputs = [
+            ps.setuptoolsBuildHook
+            ps.setuptools
+            ps.pythonImportsCheckHook
+
+            pkgs.ghdl # VHDL simulator needed for build/testing
+            ps.pytest
+          ];
+
+          propagatedBuildInputs = [
+            ps.colorama
+          ];
+        })
+      ]);
+      vhdl-toolchain = pkgs.symlinkJoin {
+        name = "vhdl-toolchain";
+        meta.mainProgram = "ghdl";
+        paths = [
+          pkgs.ghdl
+          python-env
+          pkgs.gtkwave
+        ];
+      };
+    in {
+      packages.${system}.default = vhdl-toolchain;
+
+      devShells.${system} = {
+        default = pkgs.mkShell {
+          packages = [
+            vhdl-toolchain
+
+            (pkgs.rustPlatform.buildRustPackage rec {
+                pname = "vhdl-ls";
+                version = "0.77.0-patched";
+
+                src = pkgs.fetchFromGitHub {
+                  owner = "Rutherther";
+                  repo = "rust_hdl";
+                  rev = "return-new-line";
+                  hash = "sha256-EYG6Rycnq9unTTVk9Iy6ivnbr8sT1U7vnNGnnZefSqk=";
+                };
+
+                cargoHash = "sha256-YkeepkJLq95e9X2v+1AxMBmT0q4ARJXA1WB89/KmTcY=";
+
+                postPatch = ''
+                  substituteInPlace vhdl_lang/src/config.rs \
+                    --replace /usr/lib $out/lib
+                '';
+
+                postInstall = ''
+                  mkdir -p $out/lib/rust_hdl
+                  cp -r vhdl_libraries $out/lib/rust_hdl
+                '';
+            })
+          ];
+
+          VUNIT_SIMULATOR = "ghdl";
+        };
+      };
+    };
+}

@@ 1,17 @@
+#!/usr/bin/env python3
+
+from vunit import VUnit
+from pathlib import Path
+
+vu = VUnit.from_argv(compile_builtins = False)
+
+vu.add_vhdl_builtins()
+vu.add_com()
+
+filter_tb_lib = vu.add_library('filter_tb')
+filter_tb_lib.add_source_files(Path(__file__).parent / 'tb/**/*.vhd')
+
+filter_lib = vu.add_library('filter')
+filter_lib.add_source_files(Path(__file__).parent / 'src/**/*.vhd')
+
+vu.main()