/*
  74HC595 Arduino Shift Register example for Wokwi
  Copyright (C) 2021, Uri Shaked
  
  License: MIT.
*/

const int dataPin = 8;   /* DS */
const int clockPin = 9;  /* SHCP */
const int latchPin = 10;  /* STCP */

const int SW0 = 0;
const int SW1 = 1;
const int SW2 = 2;
const int SW3 = 3;
const int SW4 = 4;
const int SW5 = 5;
const int SW6 = 6;
const int SW7 = 7;

void setup() {
  pinMode(dataPin, OUTPUT);
  pinMode(clockPin, OUTPUT);
  pinMode(latchPin, OUTPUT);
  pinMode(SW0, INPUT_PULLUP);
  pinMode(SW1, INPUT_PULLUP);
  pinMode(SW2, INPUT_PULLUP);
  pinMode(SW3, INPUT_PULLUP);
  pinMode(SW4, INPUT_PULLUP);
  pinMode(SW5, INPUT_PULLUP);
  pinMode(SW6, INPUT_PULLUP);
  pinMode(SW7, INPUT_PULLUP);
}

void loop() {
  uint8_t bits = 0;
  bitWrite(bits, 0, digitalRead(SW0));
  bitWrite(bits, 1, digitalRead(SW1));
  bitWrite(bits, 2, digitalRead(SW2));
  bitWrite(bits, 3, digitalRead(SW3));
  bitWrite(bits, 4, digitalRead(SW4));
  bitWrite(bits, 5, digitalRead(SW5));
  bitWrite(bits, 6, digitalRead(SW6));
  bitWrite(bits, 7, digitalRead(SW7));

  digitalWrite(latchPin, LOW);
  shiftOut(dataPin, clockPin, LSBFIRST, bits);
  digitalWrite(latchPin, HIGH);
}