EspI2SDemo.h

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// Simple test for the I2S on the ESP32dev board.
// IMPORTANT:
//   This is using examples is built on esp-idf 4.x. This existed prior to Arduino Core 3.0.0.
//   To use this example, you MUST downgrade to Arduino Core < 3.0.0
//   or it won't work on Arduino.
 
#ifdef ESP32
 
 
 
#define FASTLED_ESP32_I2S
#include <FastLED.h>
 
// How many leds in your strip?
#define NUM_LEDS 1
 
// For led chips like WS2812, which have a data line, ground, and power, you just
// need to define DATA_PIN.  For led chipsets that are SPI based (four wires - data, clock,
// ground, and power), like the LPD8806 define both DATA_PIN and CLOCK_PIN
// Clock pin only needed for SPI based chipsets when not using hardware SPI
#define DATA_PIN 3
 
// Define the array of leds
CRGB leds[NUM_LEDS];
 
void setup() { 
    // Uncomment/edit one of the following lines for your leds arrangement.
    // ## Clockless types ##
    FastLED.addLeds<NEOPIXEL, DATA_PIN>(leds, NUM_LEDS);  // GRB ordering is assumed
}
 
void loop() { 
  // Turn the LED on, then pause
  leds[0] = CRGB::Red;
  FastLED.show();
  delay(500);
  // Now turn the LED off, then pause
  leds[0] = CRGB::Black;
  FastLED.show();
  delay(500);
 
  // This is a no-op but tests that we have access to gCntBuffer, part of the
  // i2s api. You can delete this in your own sketch. It's only here for testing
  // purposes.
  if (false) {
    int value = gCntBuffer;
    value++;
  }
}
 
#else  // ESP32
 
// Non-ESP32 platform - provide minimal example for compilation testing
#include <FastLED.h>
 
#define NUM_LEDS 1
#define DATA_PIN 3
 
CRGB leds[NUM_LEDS];
 
void setup() { 
    FastLED.addLeds<NEOPIXEL, DATA_PIN>(leds, NUM_LEDS);
}
 
void loop() { 
    leds[0] = CRGB::Red;
    FastLED.show();
    delay(500);
    leds[0] = CRGB::Black;
    FastLED.show();
    delay(500);
}
 
#endif  // ESP32