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- // you need MIDIUSB.
- #include "MIDIUSB.h"
- #include "PitchToNote.h"
- #define NUM_BUTTONS 16
- const uint16_t button1 = 2;
- const uint16_t button2 = 3;
- const uint16_t button3 = 4;
- const uint16_t button4 = 5;
- const uint16_t button5 = 6;
- const uint16_t button6 = 7;
- const uint16_t button7 = 8;
- const uint16_t button8 = 9;
- const uint16_t button9 = 10;
- const uint16_t button10 = 14;
- const uint16_t button11 = 15;
- const uint16_t button12 = 16;
- const uint16_t button13 = 18;
- const uint16_t button14 = 19;
- const uint16_t button15 = 20;
- const uint16_t button16 = 21;
- const uint16_t buttons[NUM_BUTTONS] = {button1, button2, button3, button4, button5, button6, button7, button8, button9, button10, button11, button12, button13, button14, button15, button16};
- const byte notePitches[NUM_BUTTONS] = {pitchC2, pitchD2b, pitchD2, pitchE2b, pitchE2, pitchF2, pitchG2b, pitchG2, pitchA2b, pitchA2, pitchB2b, pitchB2, pitchC3, pitchD3b, pitchD3, pitchE3b};
- uint16_t notesTime[NUM_BUTTONS];
- uint16_t pressedButtons = 0x00;
- uint16_t previousButtons = 0x00;
- uint16_t intensity;
- void setup() {
- for (int i = 0; i < NUM_BUTTONS; i++)
- pinMode(buttons[i], INPUT_PULLUP);
- }
- void loop() {
- readButtons();
- playNotes();
- }
- // First parameter is the event type (0x0B = control change).
- // Second parameter is the event type, combined with the channel.
- // Third parameter is the control number number (0-119).
- // Fourth parameter is the control value (0-127).
- void controlChange(byte channel, byte control, byte value) {
- midiEventPacket_t event = {0x0B, 0xB0 | channel, control, value};
- MidiUSB.sendMIDI(event);
- }
- void readButtons()
- {
- for (int i = 0; i < NUM_BUTTONS; i++)
- {
- if (digitalRead(buttons[i]) == LOW)
- {
- bitWrite(pressedButtons, i, 1);
- delay(2);
- }
- else
- bitWrite(pressedButtons, i, 0);
- }
- }
- void playNotes()
- {
- for (int i = 0; i < NUM_BUTTONS; i++)
- {
- if (bitRead(pressedButtons, i) != bitRead(previousButtons, i))
- {
- if (bitRead(pressedButtons, i))
- {
- bitWrite(previousButtons, i , 1);
- noteOn(0, notePitches[i], 100);
- MidiUSB.flush();
- }
- else
- {
- bitWrite(previousButtons, i , 0);
- noteOff(0, notePitches[i], 0);
- MidiUSB.flush();
- }
- }
- }
- }
- // First parameter is the event type (0x09 = note on, 0x08 = note off).
- // Second parameter is note-on/note-off, combined with the channel.
- // Channel can be anything between 0-15. Typically reported to the user as 1-16.
- // Third parameter is the note number (48 = middle C).
- // Fourth parameter is the velocity (64 = normal, 127 = fastest).
- void noteOn(byte channel, byte pitch, byte velocity) {
- midiEventPacket_t noteOn = {0x09, 0x90 | channel, pitch, velocity};
- MidiUSB.sendMIDI(noteOn);
- }
- void noteOff(byte channel, byte pitch, byte velocity) {
- midiEventPacket_t noteOff = {0x08, 0x80 | channel, pitch, velocity};
- MidiUSB.sendMIDI(noteOff);
- }
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