**MIDI Control** rev_12

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    - Project: **MIDI Control**
    - Source Code NOT compiled for: Arduino Pro Mini 5V
    - Source Code created on: 2025-06-09 21:39:55

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/****** SYSTEM REQUIREMENTS *****/
/****** SYSTEM REQUIREMENT 1 *****/
    /* Utilizes MIDIUSB library to create a MIDI */
    /* controller that can send note and control change */
    /* messages, allowing integration with various MIDI- */
    /* compatible software and hardware. */
/****** END SYSTEM REQUIREMENTS *****/


/********* User code review feedback **********
#### Feedback 1 ####
- Compilation error: 'MIDI' was not declared in this scope
#### Feedback 2 ####
- Compilation error: 'class MIDI_' has no member named 'begin'
#### Feedback 3 ####
- Compilation error: 'class MIDI_' has no member named 'sendNoteOn
'
#### Feedback 4 ####
- does not trigger midi notes
#### Feedback 5 ####
- trigger 2 notes at the sametime
#### Feedback 6 ####
- code do not send any midi
#### Feedback 7 ####
- code is not sending midi,when push button on hardware noting hap
pens
#### Feedback 8 ####
- code is code is trigering 3 notes simultaneously cc127 cc127 and
 cc0 fix this
#### Feedback 9 ####
- code is trigering 2 notes simultaneously cc127 and cc0 fix this
#### Feedback 10 ####
- when button is pressed code send cc but nothing happens on softw
are
#### Feedback 11 ####
- Compilation error: 'class MIDI_' has no member named 'begin'
********* User code review feedback **********/

/* START CODE */

/****** DEFINITION OF LIBRARIES *****/
#include <MIDIUSB.h>    //https://github.com/arduino-libraries/MIDIUSB
#include <Adafruit_NeoPixel.h> // NeoPixel library

/****** FUNCTION PROTOTYPES *****/
void setup(void);
void loop(void);

/****** DEFINITION OF LIBRARIES CLASS INSTANCES*****/
#define NUM_BUTTONS 2 // updated to 2 buttons on the controller
#define BUTTON_PIN 2 // pin connected to the buttons
#define NUM_PIXELS 2 // updated to 2 NeoPixels on the controller
#define PIXEL_PIN 5 // pin connected to the NeoPixels

Adafruit_NeoPixel pixels = Adafruit_NeoPixel(NUM_PIXELS, PIXEL_PIN, NEO_GRB + NEO_KHZ800); // initialize NeoPixel object
int buttonState[NUM_BUTTONS]; // array to store button states
int lastButtonState[NUM_BUTTONS]; // array to store last button states
int activeNote = -1; // variable to store currently active note

void setup(void)
{
    // put your setup code here, to run once:
    pinMode(BUTTON_PIN, INPUT_PULLUP); // set button pin as input with internal pull-up resistor
    pixels.begin(); // initialize NeoPixels
    // Removed MidiUSB.begin(); since it does not exist
}

void loop(void)
{
    // put your main code here, to run repeatedly:
    for (int i = 0; i < NUM_BUTTONS; i++) { // loop through all buttons
        buttonState[i] = digitalRead(BUTTON_PIN + i); // read button state
        if (buttonState[i] != lastButtonState[i]) { // if button state has changed
            if (buttonState[i] == LOW) { // if button is pressed
                pixels.setPixelColor(i, pixels.Color(255, 255, 255)); // set NeoPixel color to white
                // Create MIDI note on event for the pressed note
                if (activeNote != (i + 60)) { // check if a different note is active
                    if (activeNote != -1) { // if there is an active note, turn it off
                        midiEventPacket_t noteOff = {0x09, 0x80 | (activeNote), 0, 0}; // Note Off message for the previously active note
                        MidiUSB.sendMIDI(noteOff); // send MIDI note off message for the previously active note
                    }
                    activeNote = (i + 60); // update active note
                    midiEventPacket_t noteOn = {0x09, 0x90 | activeNote, 127, 0}; // Note On message for the pressed note
                    MidiUSB.sendMIDI(noteOn); // send MIDI note on message for the pressed note
                    MidiUSB.flush(); // ensure the MIDI messages are sent
                }
            } else { // if button is released
                pixels.setPixelColor(i, pixels.Color(0, 0, 0)); // turn off NeoPixel
                if (activeNote == (i + 60)) { // check if the released note is the active note
                    midiEventPacket_t noteOff = {0x09, 0x80 | (activeNote), 0, 0}; // Note Off message for the released note
                    MidiUSB.sendMIDI(noteOff); // send MIDI note off message for the released note
                    MidiUSB.flush(); // ensure the MIDI messages are sent
                    activeNote = -1; // reset active note
                }
            }
            pixels.show(); // update NeoPixels
        }
        lastButtonState[i] = buttonState[i]; // store current button state as last button state
    }
}

/* END CODE */