#define data_pin  2
#define latch_pin 3
#define clock_pin 4
#define LSBFIRST 0
#define MSBFIRST 1

byte data = B01100110;
byte ndata =~ data;


void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  pinMode(data_pin, OUTPUT);
  pinMode(latch_pin, OUTPUT);
  pinMode(clock_pin, OUTPUT);

}

void loop() {
  // put your main code here, to run repeatedly:
  on_off_leds(data);
  delay(500);
  on_off_leds(ndata);
  delay(500);
}

void on_off_leds(byte data_val){
  digitalWrite(latch_pin, LOW);
  s_out(data_pin, clock_pin, LSBFIRST, data_val);
  digitalWrite(latch_pin, HIGH);
}


/* shiftOut function own implementation*/
void s_out(uint8_t dataPin, uint8_t clockPin, uint8_t format, byte actual_data){
  uint8_t bit_val;
  if(format == LSBFIRST){

    for(int8_t i = 0; i < 8; i++){
      bit_val = (actual_data & (1 << i)) > 0; // si el bit en cualquier posicion es 1 entonces 
      // bit_val = true (1) sino false (0)

      digitalWrite(clockPin, LOW);
      digitalWrite(dataPin, bit_val);
      delayMicroseconds(0.015);
      digitalWrite(clockPin, HIGH);
      delayMicroseconds(0.1);
    }
  }else if(format == MSBFIRST){
    for(int8_t j = 7; j >= 0; j--){
      bit_val = (actual_data & (1 << j)) > 0; // si el bit en cualquier posicion es 1 entonces 
      // bit_val = true (1) sino false (0)
      //Serial.println(bit_val);
      digitalWrite(clockPin, LOW);
      digitalWrite(dataPin, bit_val);
      delayMicroseconds(0.015);
      digitalWrite(clockPin, HIGH);
      delayMicroseconds(0.1);
    }
  }
}