Arduino script to display tempo beat using Cantabile Tempo LEDs binding

TempoLeds.ino

#include <Adafruit_NeoPixel.h>
#include <MIDI.h>

#define PIN_COLOR_LEDS      6

#define CC_TEMPO_LEDS     127
#define BEAT_MASK         0x0F
#define BEATS_SHIFT       4
#define BEATS_OFFSET      2
#define BEATS_MASK        0x0F

Adafruit_NeoPixel colorLeds = Adafruit_NeoPixel(8, PIN_COLOR_LEDS, NEO_GRB + NEO_KHZ800);

MIDI_CREATE_DEFAULT_INSTANCE();

// One time setup
void setup() 
{
    // Clear LEDs
    colorLeds.begin();
    colorLeds.clear();
    colorLeds.show();

    // Init MIDI
    MIDI.begin(MIDI_CHANNEL_OMNI);  // Listen to all incoming messages
}

void loop() 
{
    // Read MIDI events
    while (MIDI.read())
    {
        // Is it the correct CC
        if (MIDI.getType() == midi::ControlChange && MIDI.getData1() == CC_TEMPO_LEDS)
        {
            // Read the current beat number and beat count
            int beats = ((MIDI.getData2() >> BEATS_SHIFT) & BEATS_MASK) + BEATS_OFFSET;
            int beat = MIDI.getData2() & BEAT_MASK;

            // Update LEDs
            colorLeds.clear();
            for (int i=0; i<beats; i++)
            {
                colorLeds.setPixelColor(i, i == beat ? 0x040404 : 0x000001);
            }  
            colorLeds.show();
        }
    }
}