chore: add Quartus Prime Lite toolchain via nix flake in devbox

.gitignore

@@ -5,6 +5,7 @@ fpga/**/output_files/
 fpga/**/simulation/
 *.qws
 *.qsf.bak
+*_assignment_defaults.qdf
 *.qarlog
 *.rpt
 *.summary

devbox.json

@@ -1,6 +1,6 @@
 {
   "$schema":  "https://raw.githubusercontent.com/jetify-com/devbox/0.17.2/.schema/devbox.schema.json",
-  "packages": ["arduino-cli@latest"],
+  "packages": ["arduino-cli@latest", "path:./nix#quartus"],
   "shell": {
     "init_hook": [
       "echo 'Welcome to devbox!' > /dev/null"
@@ -13,6 +13,9 @@
       ],
       "build": [
         "arduino-cli compile --fqbn arduino:samd:mkrvidor4000 arduino/strix"
+      ],
+      "fpga": [
+        "cd fpga/src && quartus_sh --flow compile strix"
       ]
     }
   }

fpga/src/strix.qsf

@@ -42,7 +42,7 @@ set_global_assignment -name DEVICE 10CL016YU256C8G
 set_global_assignment -name TOP_LEVEL_ENTITY strix
 set_global_assignment -name ORIGINAL_QUARTUS_VERSION 23.1STD.1
 set_global_assignment -name PROJECT_CREATION_TIME_DATE "18:01:00  JULY 21, 2024"
-set_global_assignment -name LAST_QUARTUS_VERSION "23.1std.1 Lite Edition"
+set_global_assignment -name LAST_QUARTUS_VERSION "25.1std.0 Lite Edition"
 set_global_assignment -name PROJECT_OUTPUT_DIRECTORY output_files
 set_global_assignment -name MIN_CORE_JUNCTION_TEMP 0
 set_global_assignment -name MAX_CORE_JUNCTION_TEMP 85

nix/flake.lock

@@ -0,0 +1,27 @@
+{
+  "nodes": {
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1792773339,
+        "narHash": "sha256-rZLrzrC6i+jnTAlvPZHogKDulY7WWDEv9hJeHieO7Zw=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "3ec636362e1816bc2f0888fa0fa2c69f1bc9e504",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "nixpkgs": "nixpkgs"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

nix/flake.nix

@@ -0,0 +1,21 @@
+{
+  description = "STRIX FPGA toolchain";
+
+  inputs.nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+
+  outputs = { nixpkgs, ... }:
+    let
+      # Quartus is unfree (free of charge, proprietary) and only built for x86_64-linux.
+      pkgs = import nixpkgs {
+        system = "x86_64-linux";
+        config.allowUnfree = true;
+      };
+    in
+    {
+      # Only the Vidor's FPGA family; Questa is dropped in favour of open-source simulators.
+      packages.x86_64-linux.quartus = pkgs.quartus-prime-lite.override {
+        supportedDevices = [ "Cyclone 10 LP" ];
+        withQuesta = false;
+      };
+    };
+}