BlinkWS2812-ESPS3-Generic-Purple-AI-S3.ino

/*WS2812 RGB blink buit-in led
Tested with esp32-arduino v 2.0.3 & v 2.0.5 library on generic esp32s3 purble board
https://raw.githubusercontent.com/cosismo/esp32-s3/gh-pages/Purple-S3-pinout.png

Relevant Arduino IDE config:
 Flash Mode: DIO 80MHz
 Flash Size: 16MB (128Mb)
 PSRAM: QSPI PSRAM
 Partition Scheme: 16MB Flash (3MB APP /9.9MB FATFS)
*/

#include <Adafruit_NeoPixel.h>  //Tested with Adafruit_NeoPixel v 1.10.6

// Which pin on the Arduino is connected to the NeoPixels?
#define PIN      48  // ESP32S3 Generic AI-S3 (Purple)

// How many NeoPixels are attached to the Arduino?
#define NUMPIXELS 1

// Setting up the NeoPixel library
Adafruit_NeoPixel pixels(NUMPIXELS, PIN, NEO_GRB + NEO_KHZ800);

#define DELAYVAL 500 // Time (in milliseconds) to pause between pixels

static uint8_t brightness = 128;
static uint8_t r = 0;
static uint8_t g = 0;
static uint8_t b = 0;

void setup() {
  Serial.begin(115200);
  pixels.begin(); // INITIALIZE NeoPixel strip object (REQUIRED)
}

void loop() {
  pixels.clear(); // Set all pixel colors to 'off'

  for (uint8_t i = 1; i < 8; i++) {
    /* Get the rgb bits shifting the counter variable
         to the right and then masking with AND 0x1 */
    bool r = ( (i  >> 2) & 1 ) * brightness;  
    bool g = ( (i  >> 1) & 1 ) * brightness;
    bool b = ( (i  >> 0) & 1 ) * brightness; //shift 0, I know. Aesthetics and symmetry ;)
    Serial.printf("i= %d | rgb bits = r:%d, g:%d, b:%d,\n", i, r, g, b);

    pixels.setPixelColor(0, pixels.Color(r, g, b));

    pixels.show();   // Send the updated pixel colors to the hardware.
    delay(DELAYVAL); // Pause before next pass through loop
  }
}

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