From e74849a71d9fff58a65bf11a14dafde1b32a8a1d Mon Sep 17 00:00:00 2001
From: "Edgar P. Burkhart" <git@edgarpierre.fr>
Date: Mon, 4 Jul 2022 09:20:54 +0200
Subject: [PATCH] Control box with Keyboard F-keys

---
 ControlBox.ino | 91 ++++++++++++++++++++++++++++++++++++++++++++++++++
 sketch.json    |  6 ++++
 2 files changed, 97 insertions(+)
 create mode 100644 ControlBox.ino
 create mode 100644 sketch.json

diff --git a/ControlBox.ino b/ControlBox.ino
new file mode 100644
index 0000000..9f1584c
--- /dev/null
+++ b/ControlBox.ino
@@ -0,0 +1,91 @@
+#include <Keyboard.h>
+
+const byte BR[3] = {9,5,13}; // Button array rows
+const byte BC[3] = {10,11,12}; // Button array columns
+/*const byte BK[3][3] = {{KEY_KP_1,KEY_KP_2,KEY_KP_3},
+	{KEY_KP_4,KEY_KP_5,KEY_KP_6},
+	{KEY_KP_7,KEY_KP_8,KEY_KP_9}
+}; // Buttons controller keys */
+const byte BK[3][3] = {{KEY_F15,KEY_F16,KEY_F17},
+	{KEY_F18,KEY_F19,KEY_F20},
+	{KEY_F21,KEY_F22,KEY_F23}
+}; // Buttons controller keys
+bool Bstate[3][3] = {{0,0,0},{0,0,0},{0,0,0}}; // Buttons state
+
+const byte RE[6][2] = {{8,2},{7,3},{6,4},{19,18},{21,20},{22,23}}; // Rotary encoders pins {A,B}
+const byte REK[6][2] = {{9,10},{11,12},{13,14},{15,16},{17,18},{19,20}}; // Rotary encoders keys {-,+}
+unsigned long REchange[6] = {0,0,0,0,0,0}; // Last RE change time
+bool REstate[6] = {0,0,0,0,0,0}; // Rotary encoders state
+
+void setup() {
+	for (int i = 0; i < 12; i++) {
+		pinMode(RE[i / 2][i % 2], INPUT_PULLUP);
+	}
+	for (int i = 0; i < 3; i++) {
+		pinMode(BR[i], INPUT);
+		pinMode(BC[i], INPUT_PULLUP);
+	}
+	for (int i = 0; i < 6; i++) {
+		pinMode(RE[i][0], INPUT_PULLUP);
+		pinMode(RE[i][1], INPUT_PULLUP);
+	}
+
+	Keyboard.begin();
+}
+
+void loop() {
+	readMatrix();
+	readEncoders();
+}
+
+
+// Read temporary button matrix
+void readMatrix() {
+	for (int i = 0; i < 3; i++) {
+		pinMode(BC[i], OUTPUT);
+		digitalWrite(BC[i], LOW);
+
+		for (int j = 0; j < 3; j++) {
+			pinMode(BR[j], INPUT_PULLUP);
+			int state = digitalRead(BR[j]);
+			if (state != Bstate[j][i]) {
+				if (i == 0 && j == 0) {
+					setKey(BK[j][i], state);
+				} else {
+					setKey(BK[j][i], !state);
+				}
+				Bstate[j][i] = state;
+			}
+			pinMode(BR[j], INPUT);
+		}
+		pinMode(BC[i], INPUT);
+	}
+}
+
+// Press key
+void setKey(byte key, bool state) {
+	if (state) {
+		Keyboard.press(key);
+	} else {
+		Keyboard.release(key);
+	}
+}
+
+void readEncoders() {
+	for (int i = 0; i < 6; i++) {
+		bool Astate = digitalRead(RE[i][0]);
+
+		if (Astate != REstate[i]) {
+			if (digitalRead(RE[i][1]) == Astate) {
+				Keyboard.press(KEY_LEFT_CTRL);
+				Keyboard.write(BK[1 + i / 3][i % 3]);
+				Keyboard.release(KEY_LEFT_CTRL);
+			} else {
+				Keyboard.press(KEY_LEFT_SHIFT);
+				Keyboard.write(BK[1 + i / 3][i % 3]);
+				Keyboard.release(KEY_LEFT_SHIFT);
+			}
+			REstate[i] = Astate;
+		}
+	}
+}
diff --git a/sketch.json b/sketch.json
new file mode 100644
index 0000000..fccbf79
--- /dev/null
+++ b/sketch.json
@@ -0,0 +1,6 @@
+{
+  "cpu": {
+    "fqbn": "arduino:avr:micro",
+    "port": ""
+  }
+}
\ No newline at end of file