framework-arduinoteensy-cxx20/libraries/FastLED/examples/Multiple/ParallelOutputDemo/ParallelOutputDemo.ino

#include <FastLED.h>

#define NUM_LEDS_PER_STRIP 16
// Note: this can be 12 if you're using a teensy 3 and don't mind soldering the pads on the back
#define NUM_STRIPS 16

CRGB leds[NUM_STRIPS * NUM_LEDS_PER_STRIP];

// Pin layouts on the teensy 3/3.1:
// WS2811_PORTD: 2,14,7,8,6,20,21,5
// WS2811_PORTC: 15,22,23,9,10,13,11,12,28,27,29,30 (these last 4 are pads on the bottom of the teensy)
// WS2811_PORTDC: 2,14,7,8,6,20,21,5,15,22,23,9,10,13,11,12 - 16 way parallel
//
// Pin layouts on the due
// WS2811_PORTA: 69,68,61,60,59,100,58,31 (note: pin 100 only available on the digix)
// WS2811_PORTB: 90,91,92,93,94,95,96,97 (note: only available on the digix)
// WS2811_PORTD: 25,26,27,28,14,15,29,11
//


// IBCC<WS2811, 1, 16> outputs;

void setup() {
  delay(5000);
  Serial.begin(57600);
  Serial.println("Starting...");
  // LEDS.addLeds<WS2811_PORTA,NUM_STRIPS>(leds, NUM_LEDS_PER_STRIP);
  // LEDS.addLeds<WS2811_PORTB,NUM_STRIPS>(leds, NUM_LEDS_PER_STRIP);
  // LEDS.addLeds<WS2811_PORTD,NUM_STRIPS>(leds, NUM_LEDS_PER_STRIP).setCorrection(TypicalLEDStrip);
  LEDS.addLeds<WS2811_PORTDC,NUM_STRIPS>(leds, NUM_LEDS_PER_STRIP);

  // Teensy 4 parallel output example
  // LEDS.addLeds<NUM_STRIPS, WS2811, 1>(leds,NUM_LEDS_PER_STRIP);
}

void loop() {
  Serial.println("Loop....");
  static uint8_t hue = 0;
  for(int i = 0; i < NUM_STRIPS; i++) {
    for(int j = 0; j < NUM_LEDS_PER_STRIP; j++) {
      leds[(i*NUM_LEDS_PER_STRIP) + j] = CHSV((32*i) + hue+j,192,255);
    }
  }

  // Set the first n leds on each strip to show which strip it is
  for(int i = 0; i < NUM_STRIPS; i++) {
    for(int j = 0; j <= i; j++) {
      leds[(i*NUM_LEDS_PER_STRIP) + j] = CRGB::Red;
    }
  }

  hue++;

  LEDS.show();
  // LEDS.delay(100);
}