**MIDI Feedback** rev_01

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    - Project: **MIDI Feedback**
    - Source Code NOT compiled for: Arduino Pro Mini 5V
    - Source Code created on: 2025-06-09 20:47:51

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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 *****/

/* 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 1 // number of buttons on the controller
#define BUTTON_PIN 2 // pin connected to the buttons
#define NUM_PIXELS 1 // number of 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

void setup(void)
{
    // put your setup code here, to run once:
    MIDI.begin(); // initialize MIDI communication
    pinMode(BUTTON_PIN, INPUT_PULLUP); // set button pin as input with internal pull-up resistor
    pixels.begin(); // initialize NeoPixels
}

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
                MIDI.sendNoteOn(i + 60, 127, 1); // send MIDI note on message with note number and velocity
            } else { // if button is released
                pixels.setPixelColor(i, pixels.Color(0, 0, 0)); // turn off NeoPixel
                MIDI.sendNoteOff(i + 60, 0, 1); // send MIDI note off message with note number and velocity
            }
            pixels.show(); // update NeoPixels
        }
        lastButtonState[i] = buttonState[i]; // store current button state as last button state
    }
}

/* END CODE */