// Source          :: Lab4
// Description     :: Lab04 - Counting in Binary
// Programmed by   :: Douglas Vieira Ferreira / 03-16-2024 

/*
The assignment involves modifying Lab 3 Arduino project to integrate a potentiometer 
for dynamic control over a counter's increment value. 
*/

const int POT_PIN = A0; // Potentiometer pin connected to A0
const int RED_PIN = 5; 
const int GREEN_PIN = 6;
const int BLUE_PIN = 7;
const int PAUSE_BUTTON_PIN = 8; // Pause button pin

// Define the BinaryDisplay class to manage the LED display
class BinaryDisplay {
public:
    int pins[4]; 

    void setup(int pin1, int pin2, int pin4, int pin8) {
        pins[0] = pin1;
        pins[1] = pin2;
        pins[2] = pin4;
        pins[3] = pin8;
        for (int i = 0; i < 4; i++) {
            pinMode(pins[i], OUTPUT);
        }
    }

    void display(int value) {
        for (int i = 0; i < 4; i++) {
            digitalWrite(pins[i], value & (1 << i) ? HIGH : LOW);
        }
    }
};

BinaryDisplay binary;
int Counter01 = 0;
int Counter16 = 0;
int Total = 0;

void setup() {
    Serial.begin(9600);
    binary.setup(10, 11, 12, 13); // Initialize BinaryDisplay with LED pins
    
    pinMode(PAUSE_BUTTON_PIN, INPUT_PULLUP);
    pinMode(RED_PIN, OUTPUT);
    pinMode(GREEN_PIN, OUTPUT);
    pinMode(BLUE_PIN, OUTPUT);
    pinMode(POT_PIN, INPUT);
}

void loop() {
    int potValue = analogRead(POT_PIN);
    int increment = map(potValue, 0, 1023, -4, 4);

    if (digitalRead(PAUSE_BUTTON_PIN) == HIGH) {
        Counter01 += increment;
        if (Counter01 >= 16) {
            Counter01 -= 16;
            Counter16++;
        } else if (Counter01 < 0) {
            Counter01 += 16;
            Counter16--;
        }

        if (Counter16 >= 4) {
            Counter16 = 0;
        } else if (Counter16 < 0) {
            Counter16 = 3;
        }

        Total = Counter16 * 16 + Counter01;
        binary.display(Counter01);

        Serial.print("Increment: ");
        Serial.print(increment);
        Serial.print(", counter16: ");
        Serial.print(Counter16);
        Serial.print(", counter01: ");
        Serial.print(Counter01);
        Serial.print(", TOTAL: ");
        Serial.println(Total);
    }
    delay(200); 
}