Add loader commands

e.g. "nix run .#flash-ulisp" flashes ulisp to the attached Teensy 4.0 board

2 files changed, 17 insertions, 0 deletions

diff --git a/build.nix b/build.nix
index 3770d57..c670866 100644
--- a/build.nix
+++ b/build.nix
@@ -27,4 +27,15 @@
       cp *.hex $out/
     '';
   };
+
+  flash = let
+    loader = name: path: pkgs.writeScript name ''
+      #!/bin/sh
+      ${pkgs.teensy-loader-cli}/bin/teensy-loader-cli --mcu=TEENSY40 -w ${path}
+    '';
+
+  in drv: file: {
+    type = "app";
+    program = ''${loader file "${drv}/${file}.hex"}'';
+  };
 }
diff --git a/flake.nix b/flake.nix
index 43e8824..b2c2111 100644
--- a/flake.nix
+++ b/flake.nix
@@ -25,5 +25,11 @@
     packages.${system} = {
       inherit teensy-core teensy-test teensy-ulisp;
     };
+
+    apps.${system} = {
+      flash-blink   = image.flash teensy-test  "blink";
+      flash-counter = image.flash teensy-test  "counter";
+      flash-ulisp   = image.flash teensy-ulisp "ulisp-arm";
+    };
   };
 }