mycircle.ino

/* mycircle
 *
 * By: Andrew Tuline
 * 
 * Date: May, 2018
 *
 * Connect your LED's end to end and this routine goes round and round.
 * 
 * There are 2 methods for timing:
 * 
 * 1) Use EVERY_N_MILLIS() to call mycircle() every 50ms.
 * 2) Use millis() as a counter and divide by 50.
 * 
 * Adjust fade value to suit. Low value = slow fade.
 *
 * Neither of these use a delay() statement, thus ensuring everything is running at full speed.
 * 
 */

#include "FastLED.h"                                          // FastLED library.

#if FASTLED_VERSION < 3001000
#error "Requires FastLED 3.1 or later; check github for latest code."
#endif


// Fixed definitions cannot change on the fly.
#define LED_DT 12                                             // Data pin to connect to the strip.
#define LED_CK 11                                             // Clock pin for WS2801 or APA102.
#define COLOR_ORDER BGR                                       // It's GRB for WS2812 and BGR for APA102.
#define LED_TYPE APA102                                       // Using APA102, WS2812, WS2801. Don't forget to change LEDS.addLeds.
#define NUM_LEDS 60                                           // Number of LED's.

// Global variables can be changed on the fly.
uint8_t max_bright = 255;                                      // Overall brightness definition. It can be changed on the fly.

struct CRGB leds[NUM_LEDS];                                   // Initialize our LED array.

// Palette definitions
CRGBPalette16 currentPalette;


void setup() {

  Serial.begin(57600);                                        // Initialize serial port for debugging.
  delay(1000);                                                // Soft startup to ease the flow of electrons.

  LEDS.addLeds<LED_TYPE, LED_DT, LED_CK, COLOR_ORDER>(leds, NUM_LEDS);  // Use this for WS2801 or APA102
//  LEDS.addLeds<LED_TYPE, LED_DT, COLOR_ORDER>(leds, NUM_LEDS);  // Use this for WS2812

  currentPalette = RainbowColors_p;
  
  FastLED.setBrightness(max_bright);
  set_max_power_in_volts_and_milliamps(5, 500);                 // FastLED Power management set at 5V, 500mA.
  
} // setup()



void loop() {


  EVERY_N_MILLIS(50) {                                          // Use EVERY_N_MILLIS() instead of delay(50). Delays are the work of the devil.
    mycircle();
  }

  mycircle2();                                                  // This method uses millis() as a counter.
  
  FastLED.show();

  EVERY_N_MILLIS(20) {
   fadeToBlackBy(leds, NUM_LEDS, 64);                           // Lots of fade. Adjust to suit.   
  }


} // loop()



void mycircle() {

  static uint16_t i = 0;                                        // Just in case the length is > 255.

  i++;
  i = i % NUM_LEDS;
  leds[i] = ColorFromPalette( currentPalette, 0, 255, LINEARBLEND);   // Use palette lookup for a greater possibility of colours if required.

} // mycircle()



void mycircle2() {

  uint16_t i = millis()/50 % NUM_LEDS;                        // Use millis() as a counter and use modulo to limit maximum value.
  leds[i] = ColorFromPalette( currentPalette, 64, 255, LINEARBLEND);   // Use palette lookup for a greater possibility of colours if required.

} // mycircle2()