// library for TLC5940 PWM driver
#include "Tlc5940.h"
#include "tlc_fades.h"
TLC_CHANNEL_TYPE channel;

void setup() {
  Serial.begin(9600);
  Tlc.init(); // 0 - 4095, default = 0
  
  // checking amount of cascaded TLC5940
  Serial.print("NUM_TLCS: ");
  Serial.println(NUM_TLCS);
  // SPI interface mode (SPI / Bitbang) of the TLC5940
  Serial.print("DATA_TRANSFER_MODE: ");
  Serial.println(DATA_TRANSFER_MODE);
}

void loop() {
  if (tlc_fadeBufferSize < TLC_FADE_BUFFER_LENGTH - 2) {
    if (!tlc_isFading(channel)) {
      uint32_t startMillis = millis() + 50;
      uint32_t endMillis = startMillis + 2000;
      tlc_addFade(channel, 0, 3000, startMillis, endMillis);
    }
    channel++;
    if (channel == NUM_TLCS * 16) {
      channel = 0;
    }
  }
  tlc_updateFades();
  delay(100);
}