**LED Control** rev_05

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    - Project: **LED Control**
    - Source Code NOT compiled for: Arduino Nano
    - Source Code created on: 2024-12-06 23:51:33

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/****** SYSTEM REQUIREMENTS *****/
/****** SYSTEM REQUIREMENT 1 *****/
    /* Add rotary potentiometer (a7 pin) to change speed */
    /* of led's cycle. So, i want current values of time */
    /* (millis startTime) be like middle, standart, when */
    /* i rotate a potentiometer, the speed must increase */
    /* or decrease respectively. */
/****** SYSTEM REQUIREMENT 2 *****/
    /* Implement a rotary potentiometer on pin A7 to */
    /* adjust the LED cycle speed. The speed should vary */
    /* based on the potentiometer's position, affecting */
    /* the timing of LEDs on pins D2, D3, and D4. */
/****** END SYSTEM REQUIREMENTS *****/

/* START CODE */

/****** DEFINITION OF LIBRARIES *****/
#include <Arduino.h> // Include Arduino library for basic functions

/****** FUNCTION PROTOTYPES *****/
void setup(void);
void loop(void);
void turnOffLeds(); // Added function prototype
bool isSwitchPressed(); // Added function prototype

// Define the pin for the rotary potentiometer
const int potPin = A7; // Pin connected to the potentiometer

void setup(void)
{
    // put your setup code here, to run once:
    pinMode(4, OUTPUT); // red led
    pinMode(3, OUTPUT); // blue led
    pinMode(2, OUTPUT); // green led
    pinMode(5, INPUT_PULLUP); // switch
}

void turnOffLeds() {
    digitalWrite(4, LOW);
    digitalWrite(3, LOW);
    digitalWrite(2, LOW);
}

bool isSwitchPressed() {
    if (digitalRead(5) == LOW) {
        delay(50);
        return digitalRead(5) == LOW;
    }
    return false;
}

void loop(void)
{
    // put your main code here, to run repeatedly:
    if (isSwitchPressed()) {
        turnOffLeds();
        return;
    }

    // Read the potentiometer value and map it to a suitable range for timing
    int potValue = analogRead(potPin);
    int ledCycleTime = map(potValue, 0, 1023, 500, 3000); // Map to a range of 500ms to 3000ms

    digitalWrite(4, HIGH);
    digitalWrite(3, LOW);
    digitalWrite(2, LOW);
    for (unsigned long startTime = millis(); millis() - startTime < ledCycleTime;) {
        if (isSwitchPressed()) {
            turnOffLeds();
            return;
        }
    }

    digitalWrite(4, HIGH);
    digitalWrite(3, HIGH);
    for (unsigned long startTime = millis(); millis() - startTime < ledCycleTime;) {
        if (isSwitchPressed()) {
            turnOffLeds();
            return;
        }
    }

    digitalWrite(4, LOW);
    digitalWrite(3, LOW);
    digitalWrite(2, HIGH);
    for (unsigned long startTime = millis(); millis() - startTime < ledCycleTime;) {
        if (isSwitchPressed()) {
            turnOffLeds();
            return;
        }
    }

    for (int i = 0; i < 4; i++) {
        digitalWrite(2, HIGH);
        for (unsigned long startTime = millis(); millis() - startTime < 250;) {
            if (isSwitchPressed()) {
                turnOffLeds();
                return;
            }
        }
        digitalWrite(2, LOW);
        for (unsigned long startTime = millis(); millis() - startTime < 170;) {
            if (isSwitchPressed()) {
                turnOffLeds();
                return;
            }
        }
    }
}

/* END CODE */