// #define s0 7
// #define s1 6
// #define s2 5
// #define s3 4

// void set_number(int pin){
//   digitalWrite(s0, bitRead(pin,0));
//   digitalWrite(s1, bitRead(pin,1));
//   digitalWrite(s2, bitRead(pin,2));
//   digitalWrite(s3, bitRead(pin,3));
// }
// void setup() {
//   // put your setup code here, to run once:
//   for (int i = 3; i<=7; i++){
//     pinMode(i, OUTPUT);

// }
// delay(1000);
// }

// void loop() {
//   // put your main code here, to run repeatedly:
//   //0-15
//   for(int i=0;i<=15;i++){
//     set_number(i);
//     digitalWrite(3, HIGH);
//     delay(1000);
//   }

// }
// Define control pins
#define S0 7
#define S1 6
#define S2 5
#define S3 4

// Variable to store the potentiometer value
int potValue = 0;

void setup() {
  // Set control pins as outputs
  pinMode(S0, OUTPUT);
  pinMode(S1, OUTPUT);
  pinMode(S2, OUTPUT);
  pinMode(S3, OUTPUT);
  pinMode(A0, INPUT);
  // Start the serial communication
  Serial.begin(9600);
}

void loop() {

// Part B
  // Read the analog value from the selected channel
  for(int i=1; i<=16; i++){
    runner(i);
  }

// Part C
  // for(int j=0; j<=15;j++){
  //   selectChannel(j);
  // }
}

// Part C
// Function to select the channel on the demultiplexer
void selectChannel(int channel) {
  for(int k=0; k<=10; k++){
      potValue = analogRead(A0);
      digitalWrite(S0, bitRead(channel, 0));
      digitalWrite(S1, bitRead(channel, 1));
      digitalWrite(S2, bitRead(channel, 2));
      digitalWrite(S3, bitRead(channel, 3));
      Serial.print("Potentiometer value for pin ");
      Serial.print(channel);
      Serial.print(" is equal to : ");
      Serial.println(potValue);
      delay(500);
  }
}

// Part C
// Void function that selectively read the potentiomter from 0-15 in order with a delay of 5s in between
void runner(int num){
  switch(num){
    case 1:
      digitalWrite(S0, LOW);
      digitalWrite(S1, LOW);
      digitalWrite(S2, LOW);
      digitalWrite(S3, LOW);
      for(int j =0; j<=10; j++){
        potValue = analogRead(A0);
        Serial.print("Potentiometer value for pin 0: ");
        Serial.println(potValue);
        delay(500);
      }
      break;
    case 2: 
      digitalWrite(S0, HIGH);
      digitalWrite(S1, LOW);
      digitalWrite(S2, LOW);
      digitalWrite(S3, LOW);
      for(int j =0; j<=10; j++){
        potValue = analogRead(A0);
        Serial.print("Potentiometer value for pin 1: ");
        Serial.println(potValue);
        delay(500);
      }
      break;
    case 3:
      digitalWrite(S0, LOW);
      digitalWrite(S1, HIGH);
      digitalWrite(S2, LOW);
      digitalWrite(S3, LOW);
      for(int j =0; j<=10; j++){
        potValue = analogRead(A0);
        Serial.print("Potentiometer value for pin 2: ");
        Serial.println(potValue);
        delay(500);
      }
      break;
    case 4:
      digitalWrite(S0, HIGH);
      digitalWrite(S1, HIGH);
      digitalWrite(S2, LOW);
      digitalWrite(S3, LOW);
      for(int j =0; j<=10; j++){
        potValue = analogRead(A0);
        Serial.print("Potentiometer value for pin 3: ");
        Serial.println(potValue);
        delay(500);
      }
      break;
    case 5:
      digitalWrite(S0, LOW);
      digitalWrite(S1, LOW);
      digitalWrite(S2, HIGH);
      digitalWrite(S3, LOW);
      for(int j =0; j<=10; j++){
        potValue = analogRead(A0);
        Serial.print("Potentiometer value for pin 4: ");
        Serial.println(potValue);
        delay(500);
      }
      break;
    case 6:
      digitalWrite(S0, HIGH);
      digitalWrite(S1, LOW);
      digitalWrite(S2, HIGH);
      digitalWrite(S3, LOW);
      for(int j =0; j<=10; j++){
        potValue = analogRead(A0);
        Serial.print("Potentiometer value for pin 5: ");
        Serial.println(potValue);
        delay(500);
      }
      break;
    case 7:
      digitalWrite(S0, LOW);
      digitalWrite(S1, HIGH);
      digitalWrite(S2, HIGH);
      digitalWrite(S3, LOW);
      for(int j =0; j<=10; j++){
        potValue = analogRead(A0);
        Serial.print("Potentiometer value for pin 6: ");
        Serial.println(potValue);
        delay(500);
      }
      break;
    case 8:
      digitalWrite(S0, HIGH);
      digitalWrite(S1, HIGH);
      digitalWrite(S2, HIGH);
      digitalWrite(S3, LOW);
      for(int j =0; j<=10; j++){
        potValue = analogRead(A0);
        Serial.print("Potentiometer value for pin 7: ");
        Serial.println(potValue);
        delay(500);
      }
      break;
    case 9:
      digitalWrite(S0, LOW);
      digitalWrite(S1, LOW);
      digitalWrite(S2, LOW);
      digitalWrite(S3, HIGH);
      for(int j =0; j<=10; j++){
        potValue = analogRead(A0);
        Serial.print("Potentiometer value for pin 8: ");
        Serial.println(potValue);
        delay(500);
      }
      break;
    case 10:
      digitalWrite(S0, HIGH);
      digitalWrite(S1, LOW);
      digitalWrite(S2, LOW);
      digitalWrite(S3, HIGH);
      for(int j =0; j<=10; j++){
        potValue = analogRead(A0);
        Serial.print("Potentiometer value for pin 9: ");
        Serial.println(potValue);
        delay(500);
      }
      break;
    case 11:
      digitalWrite(S0, LOW);
      digitalWrite(S1, HIGH);
      digitalWrite(S2, LOW);
      digitalWrite(S3, HIGH);
      for(int j =0; j<=10; j++){
        potValue = analogRead(A0);
        Serial.print("Potentiometer value for pin 10: ");
        Serial.println(potValue);
        delay(500);
      }
      break;
    case 12:
      digitalWrite(S0, HIGH);
      digitalWrite(S1, HIGH);
      digitalWrite(S2, LOW);
      digitalWrite(S3, HIGH);
      for(int j =0; j<=10; j++){
        potValue = analogRead(A0);
        Serial.print("Potentiometer value for pin 11: ");
        Serial.println(potValue);
        delay(500);
      }
      break;
    case 13:
      digitalWrite(S0, LOW);
      digitalWrite(S1, LOW);
      digitalWrite(S2, HIGH);
      digitalWrite(S3, HIGH);
      for(int j =0; j<=10; j++){
        potValue = analogRead(A0);
        Serial.print("Potentiometer value for pin 12: ");
        Serial.println(potValue);
        delay(500);
      }
      break;
    case 14:
      digitalWrite(S0, LOW);
      digitalWrite(S1, HIGH);
      digitalWrite(S2, HIGH);
      digitalWrite(S3, HIGH);
      for(int j =0; j<=10; j++){
        potValue = analogRead(A0);
        Serial.print("Potentiometer value for pin 13: ");
        Serial.println(potValue);
        delay(500);
      }
      break;
    case 15:
      digitalWrite(S0, LOW);
      digitalWrite(S1, HIGH);
      digitalWrite(S2, HIGH);
      digitalWrite(S3, HIGH);
      for(int j =0; j<=10; j++){
        potValue = analogRead(A0);
        Serial.print("Potentiometer value for pin 14: ");
        Serial.println(potValue);
        delay(500);
      }
      break;
    case 16:
      digitalWrite(S0, HIGH);
      digitalWrite(S1, HIGH);
      digitalWrite(S2, HIGH);
      digitalWrite(S3, HIGH);
      for(int j =0; j<=10; j++){
        potValue = analogRead(A0);
        Serial.print("Potentiometer value for pin 15: ");
        Serial.println(potValue);
        delay(500);
      }
      break;
  }
}