dmadison

/*
 * Basic MIDI Visualizer
 * by David Madison © 2017
 * www.partsnotincluded.com
 * 
 * This is a basic MIDI visualizer using addressable LEDs, to demonstrate how
 * Arduino's MIDI library works. Playing a note turns an LED on, stopping a note
 * turns the LED off. Continuous controllers 21, 22, and 23 adjust the RGB color.  
 * 
 */

dmadison

// Slightly modified Adalight protocol implementation that uses FastLED
// library (http://fastled.io) for driving WS2811/WS2812 led stripe
// Was tested only with Prismatik software from Lightpack project

#include "FastLED.h"

#define NUM_LEDS 114 // Max LED count
#define LED_PIN 6 // arduino output pin
#define GROUND_PIN 10
#define BRIGHTNESS 255 // maximum brightness

dmadison

uint32_t blendRGB(uint32_t c1, uint32_t c2, uint8_t p){
  /* Blends two RGB color values using a linear algorithm
   *  in the form of y = mx + b.
   *  
   * Where y is the resultant blended color (per channel), m
   *  is the slope of the color change divided by the number of steps,
   *  x is the current step, and b is the initial channel value.
   *  
   * This implementation uses a single byte for gradation, giving steps from 0-255.
   */