firmware+controller: Initial USB device

controller/.envrc

@@ -0,0 +1,2 @@
+watch_file default.nix
+use flake ..#controller --override-input rootdir "file+file://"<(printf %s "$PWD")

controller/.python-version

@@ -0,0 +1 @@
+3.13

controller/default.nix

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+{
+  perSystem = { libMy, pkgs, ... }: {
+    devenv.shells.controller = libMy.withRootdir {
+      languages = {
+        python = {
+          enable = true;
+          version = "3.13";
+          libraries = with pkgs; [
+            libusb1
+          ];
+          uv = {
+            enable = true;
+            sync.enable = true;
+          };
+        };
+      };
+
+      packages = with pkgs; [ ];
+
+      env = { };
+
+      scripts = {
+        # build.exec = ''
+        #   cmake -S . -B build -D CMAKE_BUILD_TYPE=Debug -D PICO_STDIO_SEMIHOSTING=1
+        #   cmake --build build --parallel
+        # '';
+      };
+    };
+  };
+}

controller/pyproject.toml

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+[project]
+name = "valconomy"
+version = "0.1.0"
+description = "Valconomy controller"
+requires-python = ">=3.13"
+dependencies = [
+    "pyusb>=1.2.1",
+]

controller/uv.lock

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+version = 1
+requires-python = ">=3.13"
+
+[[package]]
+name = "pyusb"
+version = "1.2.1"
+source = { registry = "https://pypi.org/simple" }
+sdist = { url = "https://files.pythonhosted.org/packages/d9/6e/433a5614132576289b8643fe598dd5d51b16e130fd591564be952e15bb45/pyusb-1.2.1.tar.gz", hash = "sha256:a4cc7404a203144754164b8b40994e2849fde1cfff06b08492f12fff9d9de7b9", size = 75292 }
+wheels = [
+    { url = "https://files.pythonhosted.org/packages/15/a8/4982498b2ab44d1fcd5c49f07ea3795eab01601dc143b009d333fcace3b9/pyusb-1.2.1-py3-none-any.whl", hash = "sha256:2b4c7cb86dbadf044dfb9d3a4ff69fd217013dbe78a792177a3feb172449ea36", size = 58439 },
+]
+
+[[package]]
+name = "valconomy"
+version = "0.1.0"
+source = { virtual = "." }
+dependencies = [
+    { name = "pyusb" },
+]
+
+[package.metadata]
+requires-dist = [{ name = "pyusb", specifier = ">=1.2.1" }]

controller/valconomy.py

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+#!/usr/bin/env python3
+import usb.core
+
+def main():
+  print(usb.core.find(idVendor=0x6969, idProduct=0x0004))
+
+if __name__ == '__main__':
+  main()