#include <xc.h>
 
// Configuration Bits (modify according to your specific settings)
#pragma config FOSC = XT       // External XT Oscillator
#pragma config WDTE = OFF      // Watchdog Timer Disable
#pragma config PWRTE = OFF     // Power-up Timer Disable
#pragma config BOREN = ON      // Brown-out Reset Enable
#pragma config LVP = OFF       // Low Voltage Programming Disable
#pragma config CPD = OFF       // Data EEPROM Memory Code Protection Disable
#pragma config WRT = OFF       // Flash Program Memory Write Enable Disable
#pragma config CP = OFF        // Flash Program Memory Code Protection Disable
 
void main() {
    unsigned char sec = 0, min = 0;
 
    // Initialize ports
    TRISB = 0x00;  // PORTB as output
    TRISD = 0x00;  // PORTD as output
    PORTB = 0x00;  // Clear PORTB
    PORTD = 0x00;  // Clear PORTD
 
    // Timer0 setup
    T0CON = 0x08;  // Timer0, 8-bit mode, no prescaler
    TMR0 = 0;      // Reset Timer0 count
 
    while (1) {
        // Wait for Timer0 overflow
        if (INTCONbits.TMR0IF == 1) {
            TMR0 = 6; // Reload Timer0 to count for 1 second (assuming 60 Hz input)
            INTCONbits.TMR0IF = 0; // Clear overflow flag
 
            sec++; // Increment seconds
 
            if (sec == 60) { // Check for 60 seconds
                sec = 0;     // Reset seconds
                min++;       // Increment minutes
 
                if (min == 60) { // Check for 60 minutes
                    min = 0;     // Reset minutes
                }
            }
 
            PORTB = sec; // Display seconds on PORTB
            PORTD = min; // Display minutes on PORTD
        }
    }
}
 

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