alemi/cv-keyboard
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əlemi 2019-03-08 21:19:06 +01:00
parent 731a05bc57
commit 4f6486bc75
2 changed files with 78 additions and 126 deletions
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.gitignore vendored
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@ -3,3 +3,4 @@
################################################################################
/.vs
/CppProperties.json

201
cvkeyboard.ino
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@ -18,159 +18,110 @@
#define Oct4 10
#define noteOffset 36
#define offCounter 0
#define MINUTE 60000
#include <MIDI.h>
#include <HID.h>
MIDI_CREATE_DEFAULT_INSTANCE();
typedef struct OctaveStatus {
bool stat[12];
int nOct;
} octst;
int note[12] = {
C, Db, D, Eb, E, F, Gb, G, Ab, A, Bb, B }; // Note Pins above
int octave[4] = {
Oct1, Oct2, Oct3, Oct4 }; // Octave Pins above
int noteCounter[49] = { 0 };
boolean status[49] = { LOW };
boolean flip[49] = { LOW };
boolean buffer = LOW;
int octBuffer;
byte noteBuffer;
byte velocity = 100; // Placeholder. Will need something to change it
int channel = 7; // Placeholder. Will need something to change it
int bpm = 120; // Placeholder. Will need something to change it
int gate = 300; // Placeholder. Will need something to change it
int clock = 0; // Used if arp to cycle through notes
octst buff;
bool kboard[49];
bool raw; // Global Settings. RAW = signal is sent when key is detected
byte velocity = 100;
byte channel = 1;
int bpm = 360;
unsigned long nextBeat = 0;
int step = 0;
int lastStep = 0;
boolean notePlayed = LOW;
unsigned long gate = 50; //ms of keypress if arpeggiator
int npressed;
void setup()
{
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);
nextBeat = millis() + (MINUTE / bpm);
}
nextBeat = millis() + (MINUTE / bpm);
pinMode(2, INPUT_PULLUP);
for (int cStat = 0; cStat < 49; cStat++) kboard[cStat] = LOW;
}
void loop() {
if (millis() < nextBeat) return;
notePlayed = LOW;
while (notePlayed == LOW) {
cleanScan();
arp();
}
nextBeat += (MINUTE / bpm);
}
void cleanScan() {
int c;
for (c = 0; c < 49; c++) noteCounter[c] = 0;
scan();
for (c = 0; c < 49; c++) {
if (status[c] == HIGH) noteCounter[c]++;
}
scan();
for (c = 0; c < 49; c++) {
if (status[c] == HIGH) noteCounter[c]++;
}
scan();
for (c = 0; c < 49; c++) {
if (status[c] == HIGH) noteCounter[c]++;
}
for (c = 0; c < 49; c++) {
if (noteCounter[c] == 3) status[c] = HIGH;
else status[c] = LOW;
}
}
void send() {
for (int c = 48; c >= 0; c--) {
if (flip[c] == HIGH) {
flip[c] = LOW;
if (noteCounter[c] > 0) {
noteCounter[c]--;
}
else {
noteCounter[c] = offCounter;
noteBuffer = c + noteOffset;
if (status[c] == HIGH) {
MIDI.sendNoteOn(noteBuffer, velocity, channel);
}
else if (status[c] == LOW) {
MIDI.sendNoteOff(noteBuffer, velocity, channel);
}
}
}
}
}
void playNote(int c, boolean status) {
if (status == HIGH) {
MIDI.sendNoteOn(c + noteOffset, velocity, channel);
}
else if (status == LOW) {
MIDI.sendNoteOff(c + noteOffset, velocity, channel);
}
}
void arp() {
step++;
while (step < 49 && status[step] == LOW) {
step++;
}
if (step == 49) {
step = 0;
}
else {
playNote(lastStep, LOW);
playNote(step, HIGH);
lastStep = step;
notePlayed = HIGH;
}
return;
}
void scan() {
npressed = 0;
raw = digitalRead(2);
for (int cOctave = 0; cOctave < 4; cOctave++) {
octBuffer = 12 * cOctave;
digitalWrite(octave[cOctave], HIGH);
for (int cNote = 0; cNote < 12; cNote++) {
buffer = digitalRead(note[cNote]);
if (buffer ^ status[cNote + octBuffer]) {
status[cNote + octBuffer] = buffer;
flip[cNote + octBuffer] = HIGH;
}
else {
flip[cNote + octBuffer] = LOW;
}
}
npressed += eval(scan(cOctave));
digitalWrite(octave[cOctave], LOW);
}
}
int nPressed() {
int c, n = 0;
for (c = 0; c < 49; c++) {
if (status[c] == HIGH) {
n++;
if (raw) {
nextBeat = millis();
return;
}
if (npressed < 1) return;
if (millis() >= nextBeat) {
nextBeat += (MINUTE / bpm);
clock++;
while (kboard[clock] == LOW) {
clock++;
if (clock == 49) clock = 0;
}
playNote(clock, HIGH);
delay(gate);
playNote(clock, LOW);
}
}
octst scan(int nOct) { // This function reads the 12 note pins and returns a struct
int c; // with 1 bool for each note
octst output;
output.nOct = nOct;
for (c = 0; c < 12; c++) {
output.stat[c] = digitalRead(note[c]);
}
return output;
}
int eval(octst input) {
int pressed = 0;
int snote = input.nOct * 12;
for (int c = 0; c < 12; c++) {
if (input.stat[c] ^ kboard[c + snote]) {
if (raw) playNote(c + snote, input.stat[c]);
kboard[c + snote] = input.stat[c];
}
if (kboard[c + snote] == HIGH) pressed++;
}
return pressed;
}
void playNote(int c, bool status) {
byte n = c + noteOffset;
if (status == HIGH) {
MIDI.sendNoteOn(n, velocity, channel);
}
else if (status == LOW) {
MIDI.sendNoteOff(n, velocity, channel);
}
}