uint32_t x;

uint8_t getByte (uint32_t x, int n) {
  return (x >> (n << 3)) & 0xff;
}

int getByte2(uint32_t x, int n) {
  return (x >> (8 * n)) & 0xFF;
}

void setup() {
  Serial.begin(115200);

  //uint32_t myl = 4294967295UL;
  //uint32_t myl = 40000000001UL;
  //uint32_t x = 1UL << 31; 

  /*
  for (int i = 0; i < 32; i++)
    Serial.println((x >> (i * 4)) & 0xF);
  while(1);
  */

  for (int i = 0; i < 32; i++) {
    Serial.print( getByte(x, i) ),
    Serial.print(" ");
    if (i > 0 && !(i%8)) Serial.println();
  }
  Serial.println();
  delay(1000);

  for (int i = 0; i < 32; i++) {
    //uint32_t x = 1UL << i;
    //uint32_t x = ((1UL << (i * 4)) & 0xF);
    x = 1UL << i;
    Serial.print("x is : ");
    Serial.println(x, BIN);
  }


   x |= (1UL << 15UL); 
  //Serial.println(x, BIN);
  delay(1000);



  for (int i = 0; i < 32; i++) {
    Serial.print( getByte2(x, i) ),
    Serial.print(" ");
    if (i > 0 && !(i%8)) Serial.println();
  }
  Serial.println();
  delay(1000);


}

void loop() {}