wip working usart and receive, but wrong baud rate. also 0kb flash reported; programmer broken?

flake.nix

@@ -5,36 +5,38 @@
     nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
   };
 
-  outputs = { nixpkgs, ... }:
+  outputs =
+    { nixpkgs, ... }:
     let
       systems = [ "x86_64-linux" ];
     in
-      {
-        config = {
-          nixpkgs.config.allowUnfree = true;
-        };
-
-        devShells = nixpkgs.lib.genAttrs systems (system:
-          let
-            # pkgs = nixpkgs.legacyPackages.${system};
-            pkgs = import nixpkgs {
-              inherit system;
-              config.allowUnfree = true;
-            };
-          in
-            {
-              default = pkgs.mkShell {
-                packages = [
-                  pkgs.gnumake
-                  pkgs.gcc-arm-embedded
-                  pkgs.stlink
-                  pkgs.gdb
-                  pkgs.openocd
-                  pkgs.stm32cubemx
-                  pkgs.gdbgui
-                ];
-              };
-            }
-        );
+    {
+      config = {
+        nixpkgs.config.allowUnfree = true;
       };
+
+      devShells = nixpkgs.lib.genAttrs systems (
+        system:
+        let
+          # pkgs = nixpkgs.legacyPackages.${system};
+          pkgs = import nixpkgs {
+            inherit system;
+            config.allowUnfree = true;
+          };
+        in
+        {
+          default = pkgs.mkShell {
+            packages = [
+              pkgs.gnumake
+              pkgs.gcc-arm-embedded
+              pkgs.stlink
+              pkgs.gdb
+              pkgs.openocd
+              pkgs.stm32cubemx
+              pkgs.gdbgui
+            ];
+          };
+        }
+      );
+    };
 }