Triggered single sine wave

/* Triggered breathing aka sine wave starting at 0.
 *
 *  By: Andrew Tuline
 *
 *  Date: May, 2020
 *
 *  I selected a sine function that starts at 0 and the standard sine functions do not do that.
 *  No point in phase shifting, etc, if I can just use an alternate function, i.e. cubicwave, etc.
 *
 */

#include <FastLED.h>

#define LED_PIN 12
#define NUM_LEDS 40
#define COLOR_ORDER GRB
#define LED_TYPE WS2812B
#define MAX_BRIGHTNESS 255

struct CRGB leds[NUM_LEDS];

void setup() {
  Serial.begin(115200);
  LEDS.addLeds<LED_TYPE, LED_PIN, COLOR_ORDER>(leds, NUM_LEDS).setCorrection(TypicalLEDStrip);
  FastLED.setBrightness(MAX_BRIGHTNESS);
  FastLED.clear();
} // setup()



void loop() {

  EVERY_N_MILLIS(3000) {             // Trigger the event every 3 seconds. Could also use a button, etc.
    triggered(1);
  }

  EVERY_N_MILLIS(10) {              // Continusly call the sine wave routine.
    triggered(0);
  }

  FastLED.show();
} // loop()



void triggered(uint8_t trigger) {

  static uint16_t counte = 256;     // High count.

  if (counte >255) Serial.println(0);

    if (trigger) {counte=0;}
    if (counte < 256) {
      uint16_t breathing = cubicwave8(counte++);
      breathing = breathing * breathing /256;                        // Optional multiplier to reduce the wave time.
      Serial.println(breathing);
//      fill_solid(leds, NUM_LEDS, CHSV(40, 250, breathing));
    }
} // triggered()