program

#include <avr/io.h>

#include <avr/interrupt.h>

#include <TM1637TinyDisplay.h>

#define CLK_PIN 2      // CLK pin to D0

#define DIO_PIN 0      // DIO pin to D1

#define POT_PIN A2     // Potentiometer pin to A0

#define LED_PIN 1      // LED pin

#define BUTTON_PIN 3   // Pin PB3 for button input

#define BUTTON_PRESSED() (!(PINB & (1 << BUTTON_PIN)))

volatile bool relayOn = false;          // Flag to track relay status

volatile uint32_t timerMillis = 0;      // Variable to store elapsed milliseconds

volatile uint32_t startTime = 0;        // Variable to store the start time when the button is pressed

volatile uint32_t blinkCounter = 0;     // Counter for LED blinking

const uint32_t timerResolution = 1000;  // Timer resolution in Hz  

TM1637TinyDisplay display(CLK_PIN, DIO_PIN);

void setupTimer0() {

  // Configure Timer0

  TCCR0A = 0; // Clear Timer0 control registers

  TCCR0B = 0;

  // Set CTC (Clear Timer on Compare Match) mode

  TCCR0A |= (1 << WGM01);

  // Set prescaler to 64

  TCCR0B |= (1 << CS01) | (1 << CS00);

  // Set Timer0 compare value for 1ms

  OCR0A = 125; // (clock frequency / (prescaler * desired frequency)) - 1

  // Enable Timer0 compare interrupt

  TIMSK |= (1 << OCIE0A);

}

void setup() {

  display.begin();

  display.setBrightness(3); // Set brightness to a value between 0 and 7

  DDRB |= (1 << LED_PIN);

  PORTB |= (1 << BUTTON_PIN);

  // Enable global interrupts

  sei();

  // Setup Timer0

  setupTimer0();

}

void loop() {

  static int prevCounterValue = 0; // Variable to store the previous counter value

  int potValue = analogRead(POT_PIN); // Read the value of the potentiometer

  int mappedValue = map(potValue, 0, 1023, 1, 10); // Map the potentiometer value to the range of 1 to 10

  if (BUTTON_PRESSED() && !relayOn) {

    startTime = timerMillis; // Record the time when the button is pressed

    relayOn = true;          // Turn on the relay

    PORTB |= (1 << LED_PIN);

  }

  if (relayOn) {

    if (timerMillis - startTime >= mappedValue * 60000) {

      relayOn = false;

      PORTB &= ~(1 << LED_PIN);

    }

  }

  if (relayOn && blinkCounter >= 1000) {

    uint32_t elapsedTime = timerMillis - startTime;

    uint32_t remainingTime = mappedValue * 60000 - elapsedTime;

    int secondsRemaining = remainingTime / 1000;

    // Update the display only if the counter value has changed significantly

    if (secondsRemaining != prevCounterValue) {

      display.showNumberDec(secondsRemaining, false);

      prevCounterValue = secondsRemaining; // Update the previous counter value

    }

  } else if (!relayOn) {

    // If the relay is off, display the mapped value

    if (mappedValue != prevCounterValue) {

      display.showNumberDec(mappedValue, false);

      prevCounterValue = mappedValue; // Update the previous counter value

    }

  }

}

//void loop(){

//   if (BUTTON_PRESSED() && !relayOn) {

//     startTime = timerMillis; // Record the time when the button is pressed

//     relayOn = true;          // Turn on the relay

//     PORTB |= (1 << LED_PIN);

//   }

//   int potValue = analogRead(POT_PIN); // Read the value of the potentiometer

//   int mappedValue = map(potValue, 0, 1023, 1, 10); // Map the potentiometer value to the range of 1 to 10

//   display.showNumberDec(mappedValue, false); // Display the mapped value on the TM1637 display

//   //delay(50); // Delay for stability, adjust as needed

//   if (relayOn) {

//     if (timerMillis - startTime >= mappedValue * 60000) {

//       relayOn = false;

//       PORTB &= ~(1 << LED_PIN);

//     }

//   }

//     if (relayOn && blinkCounter >= 1000) {

//         uint32_t elapsedTime = timerMillis - startTime;

//         uint32_t remainingTime = mappedValue * 60000 - elapsedTime;

//         int secondsRemaining = remainingTime / 1000;

//         // Display the remaining time in seconds

//         display.showNumberDec(secondsRemaining, false);

//     }

//     else if (!relayOn)

//     {

//       display.showNumberDec(mappedValue, false);

//       // delay(50);

//     }

// }

ISR(TIMER0_COMPA_vect)

{

   timerMillis++;  // Increment elapsed milliseconds

   blinkCounter++; // Increment blink counter

}