Started sketching on keyboard lookup

software/.clang-format

@@ -0,0 +1,2 @@
+
+BasedOnStyle: LLVM

software/arduino/keyboard/keyboard.ino

@@ -1,8 +1,15 @@
+#include "keyboardmap.h"
 #include "keyboardstate.h"
 #include <array>
 
 namespace {
 
+const char *keyConfig1 = "§12345"
+                         "\tQWERT"
+                         "\177ASDFG"
+                         "\129<ZXCV"
+                         "\128\131\130   ";
+
 constexpr size_t width = 6;
 constexpr size_t height = 5;
 
@@ -12,8 +19,18 @@ const std::array<char, height> yPins = {};
 typedef KeyboardState<width, height> keyboard_state_t;
 keyboard_state_t state;
 
+KeyboardMap keyboardMap(width, height, keyConfig1);
+
 } // namespace
 
+void writeKeyRelease(char key) {
+  // Implement this
+}
+
+void writeKeyPress(char key) {
+  // Implement this
+}
+
 void setup() {
   for (auto pin : xPins) {
     pinMode(pin, OUTPUT);
@@ -33,7 +50,7 @@ void readRowPins(keyboard_state_t &keyboardState, size_t x) {
     auto &keyState = keyboardState.state(x, y);
 
     if (keyState != value) {
-      // Todo: Handle this
+      keyboardMap.publishEvent(x, y, keyState);
       Serial.print("key is changed");
       keyState = value;
     }

software/arduino/keyboard/keyboardmap.h

@@ -0,0 +1,31 @@
+
+#pragma once
+
+#include "keyboardwritefunctions.h"
+#include "keys.h"
+
+
+//! A class for translating key coordinates to scancodes
+class KeyboardMap {
+  size_t _width;
+  size_t _height;
+  size_t _size;
+  const char *_translation;
+
+public:
+  KeyboardMap(size_t width, size_t height, const char *values)
+      : _width(width), _height(height), _size(width * height),
+        _translation(values) {}
+
+  void publishEvent(size_t x, size_t y, bool keyValue) {
+    size_t index = x + y * _width;
+    if (index < _size) {
+      auto out = _translation[index];
+      if (keyValue) {
+        writeKeyPress(out);
+      } else {
+        writeKeyRelease(out);
+      }
+    }
+  }
+};

software/arduino/keyboard/keyboardwritefunctions.h

@@ -0,0 +1,4 @@
+#pragma once
+
+void writeKeyRelease(char key);
+void writeKeyPress(char key);

software/arduino/keyboard/keys.h

@@ -0,0 +1,40 @@
+#pragma once
+// Special keys: https://www.arduino.cc/en/Reference/KeyboardModifiers
+
+enum Keys {
+  LEFT_CTRL = 128,
+  LEFT_SHIFT = 129,
+  LEFT_ALT = 130,
+  LEFT_GUI = 131,
+  RIGHT_CTRL = 132,
+  RIGHT_SHIFT = 133,
+  RIGHT_ALT = 134,
+  RIGHT_GUI = 135,
+  UP_ARROW = 218,
+  DOWN_ARROW = 217,
+  LEFT_ARROW = 216,
+  RIGHT_ARROW = 215,
+  BACKSPACE = 178,
+  TAB = 179,
+  RETURN = 176,
+  ESC = 177,
+  INSERT = 209,
+  DELETE = 212,
+  PAGE_UP = 211,
+  PAGE_DOWN = 214,
+  HOME = 210,
+  END = 213,
+  CAPS_LOCK = 193,
+  F1 = 194,
+  F2 = 195,
+  F3 = 196,
+  F4 = 197,
+  F5 = 198,
+  F6 = 199,
+  F7 = 200,
+  F8 = 201,
+  F9 = 202,
+  F10 = 203,
+  F11 = 204,
+  F12 = 205,
+};