// Author: RSP @KMUTNB
// Date: 2022-09-08

#if defined(ESP32)
const int LED_PINS[] = {23,22,32,33,25,26,27,14,12,13};
#else
const int LED_PINS[] = {2,3,4,5,6,7,8,9,10,11};
#endif

const int NUM_LEDS = sizeof(LED_PINS)/sizeof(int);
uint16_t MASK = (1U << NUM_LEDS)-1;

String str;

void setup() {
  Serial.begin(115200);
  for ( int i=0; i < NUM_LEDS; i++ ) {
    // set the direction of the i-th LED pin
    pinMode( LED_PINS[i], OUTPUT ); 
    // turn on the first LED (i=0) and the rest off. 
    digitalWrite( LED_PINS[i], (i==0) ? HIGH : LOW );
  }
}

void loop() {
  static uint16_t value= 1  ;

  for ( int i=0; i < NUM_LEDS; i++ ) {
      digitalWrite( LED_PINS[NUM_LEDS-i-1], !(value >> i) & 1 );     
    }
    str = "LEDs: value=0b";
    str += String(value, DEC);
    Serial.println( str.c_str() );
    Serial.println(String(((value << 1) | (value >> (NUM_LEDS-1)))+1U)+' '+String(MASK));
    value = (((value << 1) | (value >> (NUM_LEDS-1)))+1U) & MASK ;
    delay(500);
}