Optional, extra symbols

This adds the Kaleidoscope::AlphaSquareSymbols namespace, for symbols that fall
outside of the normal alphanumerics. The first such symbol is `λ`.

Fixes #3.

Signed-off-by: Gergely Nagy <algernon@madhouse-project.org>

examples/LED-AlphaSquare/LED-AlphaSquare.ino

@@ -68,6 +68,24 @@ const macro_t *macroAction(uint8_t macroIndex, uint8_t keyState) {
       }
       delay (100);
     }
+
+    LEDControl.set_all_leds_to (0, 0, 0);
+    LEDControl.led_sync ();
+    delay (100);
+    for (uint8_t step = 0; step <= 0xf0; step += 8) {
+      AlphaSquare.color = { step, step, step };
+      AlphaSquare.display (KaleidoscopePlugins::AlphaSquareSymbols::Lambda, 2);
+      AlphaSquare.display (KaleidoscopePlugins::AlphaSquareSymbols::Lambda, 10);
+      delay (10);
+    }
+    for (uint8_t step = 0xff; step >= 8; step -= 8) {
+      AlphaSquare.color = { step, step, step };
+      AlphaSquare.display (KaleidoscopePlugins::AlphaSquareSymbols::Lambda, 2);
+      AlphaSquare.display (KaleidoscopePlugins::AlphaSquareSymbols::Lambda, 10);
+      delay (10);
+    }
+    delay (100);
+
   }
   LEDControl.set_all_leds_to (0, 0, 0);
 

src/Kaleidoscope-LED-AlphaSquare.h

@@ -20,3 +20,4 @@
 
 #include <Kaleidoscope/LED-AlphaSquare.h>
 #include <Kaleidoscope/AlphaSquare-Effect.h>
+#include <Kaleidoscope/AlphaSquare-Symbols.h>

src/Kaleidoscope/AlphaSquare-Symbols.h

@@ -0,0 +1,31 @@
+/* -*- mode: c++ -*-
+ * Kaleidoscope-LED-AlphaSquare -- 4x4 pixel LED alphabet
+ * Copyright (C) 2017  Gergely Nagy
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include <Kaleidoscope/LED-AlphaSquare.h>
+
+namespace KaleidoscopePlugins {
+  namespace AlphaSquareSymbols {
+    /* λ */
+    static constexpr uint16_t Lambda = SYM4x4(1, 0, 0, 0,
+                                              0, 1, 0, 0,
+                                              0, 1, 1, 0,
+                                              1, 0, 0, 1);
+  };
+};