nix: add openocd flashing

default.nix

@@ -4,5 +4,33 @@ in
 with import <nixpkgs> { overlays = [ mozillaOverlay ]; };
 let
   rustPlatform = recurseIntoAttrs (callPackage (import ./nix/rustPlatform.nix) {});
+  adc2tcp = callPackage (import ./nix/adc2tcp.nix) { inherit rustPlatform; };
+  openocd = callPackage (import ./nix/openocd.nix) {};
 in
-callPackage (import ./nix/adc2tcp.nix) { inherit rustPlatform; }
+stdenv.mkDerivation {
+  name = "adc2tcp-dist";
+  buildInputs = [
+    adc2tcp
+    openocd
+    gdb
+  ];
+  src = ./.;
+  dontBuild = true;
+
+  installPhase = ''
+    mkdir -p $out/bin $out/lib
+
+    BIN=$out/lib/adc2tcp
+    ln -s ${adc2tcp}/lib/adc2tcp $BIN
+    cat >> $out/bin/flash-adc2tcp <<EOF
+    #!/usr/bin/env bash
+    ${openocd}/bin/openocd-nucleo-f429zi \
+      -c "reset halt" \
+      -c "flash write_image erase $BIN" \
+      -c "verify_image $BIN" \
+      -c "reset run" \
+      -c "shutdown"
+    EOF
+    chmod +x $out/bin/flash-adc2tcp
+  '';
+}

nix/adc2tcp.nix

@@ -10,4 +10,8 @@ buildRustPackage rec {
   cargoSha256 = "0q3cn3jzgmrqiymisxymn19vbnnpsj7if052w5zh25x9ikin6lpl";
 
   doCheck = false;
+  installPhase = ''
+    mkdir -p $out/lib
+    cp target/thumbv7em-none-eabihf/release/adc2tcp $out/lib/
+  '';
 }

nix/default.nix

@@ -1,16 +0,0 @@
-{ stdenv, callPackage }:
-
-let
-  adc2tcp = callPackage (import ./adc2tcp.nix) {};
-in
-stdenv.mkDerivation {
-  name = "adc2tcp";
-  buildInputs = [
-    adc2tcp
-  ];
-  src = ./.;
-  noBuild = true;
-  installPhase = ''
-    find ${adc2tcp} -type f
-  '';
-}

nix/openocd.nix

@@ -0,0 +1,22 @@
+{ stdenv, openocd }:
+
+stdenv.mkDerivation {
+  name = "openocd-nucleo-f429zi";
+  buildInputs = [
+    openocd
+  ];
+  src = ./.;
+  noBuild = true;
+  installPhase = ''
+    mkdir -p $out/bin
+    cat >> $out/bin/openocd-nucleo-f429zi <<EOF
+    #!/usr/bin/env bash
+    ${openocd}/bin/openocd \
+      -f ${openocd}/share/openocd/scripts/interface/stlink-v2-1.cfg \
+      -f ${openocd}/share/openocd/scripts/target/stm32f4x.cfg \
+      -c "init" \
+      "\$@"
+    EOF
+    chmod +x $out/bin/openocd-nucleo-f429zi
+  '';
+}

nix/rustPlatform.nix

@@ -7,7 +7,7 @@ let
     # "thumbv7em-none-eabi"
     "thumbv7em-none-eabihf"
   ];
-  rust = builtins.trace "Selected channel ${rustChannel}"
+  rust = builtins.trace "rustChannel: selected channel ${rustChannel}"
     rustChannelOfTargets rustChannel null targets;
 in
 makeRustPlatform {

shell.nix

@@ -5,15 +5,9 @@ let
 in
 with import <nixpkgs> { overlays = [ mozillaOverlay ]; };
 let
-  rustPlatform = recurseIntoAttrs (
-    callPackage (import ./nix/rustPlatform.nix) { inherit rustChannel; }
-  );
+  rustPlatform = callPackage (import ./nix/rustPlatform.nix) { inherit rustChannel; };
+  openocd = callPackage (import ./nix/openocd.nix) {};
 in
-# mkShell {
-#   inputsFrom = with rustPlatform.rust; [
-#     rustc cargo
-#   ];
-# }
 stdenv.mkDerivation {
   name = "adc2tcp-env";
   buildInputs = with rustPlatform.rust; [
@@ -22,4 +16,15 @@ stdenv.mkDerivation {
 
   # Set Environment Variables
   RUST_BACKTRACE = 1;
+
+  shellHook = ''
+    echo "Starting openocd…"
+    ${openocd}/bin/openocd-nucleo-f429zi &
+
+    # Let openocd output scroll by
+    sleep 1
+
+    echo "Run 'cargo build --release'"
+    echo "Then 'gdb target/thumbv7em-none-eabihf/release/adc2tcp'"
+  '';
 }