// if we press PB1 1,DELAY 2 DELAY ,5 DELAY ,6 
// if we press PB2 3,1,7,4
//if we press PB3 0,1,5,6
// if we press PB7 0,1,4,7
// LLY PB4 7632
//PB5 3,5,7,6
// PB1 AND PB7 ONE AFTER ANOTHER TO GLOW 5TH LED FOR 2 SEC
//PB1,PB4,PB7,PB6 == 7YH LED 
// PRESS 1479 TO GLOW 5TH LED AND PRESS 1543 TP GLOW 3RD LED 

//TOTAL WE HAVE 9 PROGRAMS TO EXECUTE
// HERE WE CAN MAKE USE OF lut ot execute this operations



// // if we press PB1 1,DELAY 2 DELAY ,5 DELAY ,6 
// #include <stdint.h>

// #define DDRA   (*(volatile uint8_t*)0x21)
// #define PORTA  (*(volatile uint8_t*)0x22)

// #define PINB   (*(volatile uint8_t*)0x23)
// #define DDRB   (*(volatile uint8_t*)0x24)

// void delay1sec(void){
//     TCNT1 = 0;
//     TCCR1A = 0x00;
//     TCCR1B = 0x05;
//     while (TCNT1 < 15625);
//     TCCR1B = 0x00;
// }

// int main(void){
//     DDRA = 0xFF;   // LEDs output
//     DDRB = 0x00;   // Buttons input

//     while(1){
//         if (PINB & (1 << 1)) {   // PB1 pressed

//             PORTA = (1 << 1);   // LED 1
//             delay1sec();
//             PORTA = 0x00;
//             delay1sec();

//             PORTA = (1 << 2);   // LED 2
//             delay1sec();
//             PORTA = 0x00;
//             delay1sec();

//             PORTA = (1 << 5);   // LED 5
//             delay1sec();
//             PORTA = 0x00;
//             delay1sec();

//             PORTA = (1 << 6);   // LED 6
//             delay1sec();
//             PORTA = 0x00;
//             delay1sec();
//         }
//         else {
//             PORTA = 0x00;
//         }
//     }
// }

// =================================================================================



/*
Problem Statement:
Write a program to blink LEDs in the sequence 3, 1, 7, 4
when push button PB2 is pressed.
Hardware:
- LEDs connected to PORT A (PA0–PA7)
- Push buttons connected to PORT B (PB0–PB7)
- External pull-down resistors used for push buttons
*/

#include <stdint.h>

#define DDRA   (*(volatile uint8_t*)0x21)
#define PORTA  (*(volatile uint8_t*)0x22)

#define PINB   (*(volatile uint8_t*)0x23)
#define DDRB   (*(volatile uint8_t*)0x24)

void delay1sec(void){
    TCNT1 = 0;
    TCCR1A = 0x00;
    TCCR1B = 0x05;
    while (TCNT1 < 15625);
    TCCR1B = 0x00;
}

int main(void){
    DDRA = 0xFF;   // PORT A as output (LEDs)
    DDRB = 0x00;   // PORT B as input (Buttons)

    while(1){
        if (PINB & (1 << 2)) {   // PB2 pressed

            PORTA = (1 << 3);   // LED 3
            delay1sec();
            PORTA = 0x00;
            delay1sec();

            PORTA = (1 << 1);   // LED 1
            delay1sec();
            PORTA = 0x00;
            delay1sec();

            PORTA = (1 << 7);   // LED 7
            delay1sec();
            PORTA = 0x00;
            delay1sec();

            PORTA = (1 << 4);   // LED 4
            delay1sec();
            PORTA = 0x00;
            delay1sec();
        }
        else {
            PORTA = 0x00;
        }
    }
}

================================================================================

/*
Problem Statement:
Write a program to blink LEDs in the sequence 0, 1, 5, 6
when push button PB3 is pressed.

Hardware:
- LEDs connected to PORT A (PA0–PA7)
- Push buttons connected to PORT B (PB0–PB7)
- External pull-down resistors are used for push buttons
*/

#include <stdint.h>

#define DDRA   (*(volatile uint8_t*)0x21)
#define PORTA  (*(volatile uint8_t*)0x22)

#define PINB   (*(volatile uint8_t*)0x23)
#define DDRB   (*(volatile uint8_t*)0x24)

void delay1sec(void){
    TCNT1 = 0;
    TCCR1A = 0x00;
    TCCR1B = 0x05;          // prescaler 1024
    while (TCNT1 < 15625); // ~1 second delay
    TCCR1B = 0x00;
}

int main(void){
    DDRA = 0xFF;   // PORT A as output (LEDs)
    DDRB = 0x00;   // PORT B as input (Buttons)

    while(1){
        if (PINB & (1 << 3)) {   // PB3 pressed

            PORTA = (1 << 0);   // LED 0
            delay1sec();
            PORTA = 0x00;
            delay1sec();

            PORTA = (1 << 1);   // LED 1
            delay1sec();
            PORTA = 0x00;
            delay1sec();

            PORTA = (1 << 5);   // LED 5
            delay1sec();
            PORTA = 0x00;
            delay1sec();

            PORTA = (1 << 6);   // LED 6
            delay1sec();
            PORTA = 0x00;
            delay1sec();
        }
        else {
            PORTA = 0x00;
        }
    }
}
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++



/*
Problem Statement:
Write a program to blink LEDs in the sequence 0, 1, 5, 6
when push button PB3 is pressed.

Hardware:
- LEDs connected to PORT A (PA0–PA7)
- Push buttons connected to PORT B (PB0–PB7)
- External pull-down resistors are used for push buttons
*/

#include <stdint.h>

#define DDRA   (*(volatile uint8_t*)0x21)
#define PORTA  (*(volatile uint8_t*)0x22)

#define PINB   (*(volatile uint8_t*)0x23)
#define DDRB   (*(volatile uint8_t*)0x24)

void delay1sec(void){
    TCNT1 = 0;
    TCCR1A = 0x00;
    TCCR1B = 0x05;          // prescaler 1024
    while (TCNT1 < 15625); // ~1 second delay
    TCCR1B = 0x00;
}

int main(void){
    DDRA = 0xFF;   // PORT A as output (LEDs)
    DDRB = 0x00;   // PORT B as input (Buttons)

    while(1){
        if (PINB & (1 << 3)) {   // PB3 pressed

            PORTA = (1 << 0);   // LED 0
            delay1sec();
            PORTA = 0x00;
            delay1sec();

            PORTA = (1 << 1);   // LED 1
            delay1sec();
            PORTA = 0x00;
            delay1sec();

            PORTA = (1 << 5);   // LED 5
            delay1sec();
            PORTA = 0x00;
            delay1sec();

            PORTA = (1 << 6);   // LED 6
            delay1sec();
            PORTA = 0x00;
            delay1sec();
        }
        else {
            PORTA = 0x00;
        }
    }
}








/*
Problem Statement:
Blink LEDs in the sequence 3, 5, 7, 6 when push button PB5 is pressed.
*/

#include <stdint.h>

#define DDRA  (*(volatile uint8_t*)0x21)
#define PORTA (*(volatile uint8_t*)0x22)
#define PINB  (*(volatile uint8_t*)0x23)
#define DDRB  (*(volatile uint8_t*)0x24)

void delay1sec(void){
    TCNT1=0; TCCR1A=0; TCCR1B=0x05;
    while(TCNT1<15625); TCCR1B=0;
}

int main(void){
    DDRA=0xFF; DDRB=0x00;
    while(1){
        if(PINB & (1<<5)){
            PORTA=(1<<3); delay1sec(); PORTA=0; delay1sec();
            PORTA=(1<<5); delay1sec(); PORTA=0; delay1sec();
            PORTA=(1<<7); delay1sec(); PORTA=0; delay1sec();
            PORTA=(1<<6); delay1sec(); PORTA=0; delay1sec();
        }
    }
}





/*
Problem Statement:
Blink LEDs in the sequence 0, 1, 4, 7 when push button PB7 is pressed.
*/

#include <stdint.h>

#define DDRA  (*(volatile uint8_t*)0x21)
#define PORTA (*(volatile uint8_t*)0x22)
#define PINB  (*(volatile uint8_t*)0x23)
#define DDRB  (*(volatile uint8_t*)0x24)

void delay1sec(void){
    TCNT1=0; TCCR1A=0; TCCR1B=0x05;
    while(TCNT1<15625); TCCR1B=0;
}

int main(void){
    DDRA=0xFF; DDRB=0x00;
    while(1){
        if(PINB & (1<<7)){
            PORTA=(1<<0); delay1sec(); PORTA=0; delay1sec();
            PORTA=(1<<1); delay1sec(); PORTA=0; delay1sec();
            PORTA=(1<<4); delay1sec(); PORTA=0; delay1sec();
            PORTA=(1<<7); delay1sec(); PORTA=0; delay1sec();
        }
    }
}