From 1a37d52310cd57167522384a93ed1e48ab3e53df Mon Sep 17 00:00:00 2001
From: alemi <me@alemi.dev>
Date: Wed, 31 Oct 2018 17:18:50 +0100
Subject: [PATCH] Create cvkeyboard.ino

---
 cvkeyboard.ino | 92 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 92 insertions(+)
 create mode 100644 cvkeyboard.ino

diff --git a/cvkeyboard.ino b/cvkeyboard.ino
new file mode 100644
index 0000000..ea04489
--- /dev/null
+++ b/cvkeyboard.ino
@@ -0,0 +1,92 @@
+#define C 22
+#define Db 24
+#define D 26
+#define Eb 28
+#define E 30
+#define F 32
+#define Gb 34
+#define G 36
+#define Ab 38
+#define A 40
+#define Bb 42
+#define B 44
+#define testLed 13
+
+#define Oct1 12
+#define Oct2 9
+#define Oct3 8
+#define Oct4 10
+
+#define noteOffset 36
+#define offCounter 100
+
+#include <MIDI.h>
+#include <HID.h>
+MIDI_CREATE_DEFAULT_INSTANCE();
+
+int note[12] = {
+  C, Db, D, Eb, E, F, Gb, G, Ab, A, Bb, B };  // Pin delle note : 0 -> C , 11 -> B
+int octave[4] = {
+  Oct1, Oct2, Oct3, Oct4 };         // Pin delle ottave : 0 -> 2 , 3 -> 5
+int noteCounter[49] = { 0 };
+boolean status[49] = { LOW };         // Array di stato, aggiornato durante ogni ciclo. 0 -> C2 , 11 -> C3 , 23 -> C4 -> , 35 -> C5 , 48 -> C6
+boolean flip[49] = { LOW };
+boolean buffer = LOW;             // Usato come buffer per lo stato di ogni pin, per non chiamare una lettura ogni volta.
+int octBuffer;                 // Usato per non ripetere l'aritmetica ad ogni accesso all'array di stato.
+byte noteBuffer;
+byte velocity = 100;               // Placeholder.
+int channel = 7;                  // Placeholder.
+
+
+void setup()
+{
+	for (int cOctave = 0; cOctave < 4; cOctave++) {
+		pinMode(octave[cOctave], OUTPUT);
+	}
+	for (int cNote = 0; cNote < 12; cNote++) {
+		pinMode(note[cNote], INPUT);
+	}
+	MIDI.begin(MIDI_CHANNEL_OFF);
+	Serial.begin(115200);
+}
+
+
+void loop() {
+	scan();
+}
+
+void scan() {
+	for (int cOctave = 0; cOctave < 4; cOctave++) {
+		octBuffer = 12 * cOctave;
+		digitalWrite(octave[cOctave], HIGH);
+
+
+		for (int cNote = 0; cNote < 12; cNote++) {
+			if (noteCounter[cNote + octBuffer] > 0) {
+				noteCounter[cNote + octBuffer]--;
+			}
+			else {
+				noteCounter[cNote + octBuffer] = offCounter;
+
+				buffer = digitalRead(note[cNote]);
+
+				if (buffer ^ status[cNote + octBuffer]) {
+					status[cNote + octBuffer] = buffer;
+					flip[cNote + octBuffer] = HIGH;
+					noteBuffer = cNote + octBuffer + noteOffset;
+					if (buffer == HIGH) {
+						MIDI.sendNoteOn(noteBuffer, velocity, 1);
+					}
+					if (buffer == LOW) {
+						MIDI.sendNoteOff(noteBuffer, velocity, 1);
+					}
+				}
+				else {
+					flip[cNote + octBuffer] = LOW;
+				}
+			}
+
+		}
+		digitalWrite(octave[cOctave], LOW);
+	}
+}