Arduino script to flash LED using Cantabile Tempo LEDs binding

TempoFlasher.ino

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

#define PIN_COLOR_LEDS      6

#define CC_TEMPO_LEDS     127
#define BEAT_MASK         0x0F
#define COLOR_DOWNBEAT    0x001000
#define COLOR_OTHERBEATS  0x080000
#define MILLIS_FLASH      100

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

// time stamp start of last flash
unsigned long _millisFlashOn = 0;

// 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 beat = MIDI.getData2() & BEAT_MASK;

            // Update LEDs
            colorLeds.clear();
            colorLeds.setPixelColor(0, beat == 0 ? COLOR_DOWNBEAT : COLOR_OTHERBEATS);
            colorLeds.show();
            _millisFlashOn = millis();
        }
    }

    // Turn of LED after timeout
    if (_millisFlashOn != 0 && millis() - _millisFlashOn > MILLIS_FLASH)
    {
        _millisFlashOn = 0;
        colorLeds.clear();
        colorLeds.show();
    }
}