Source code

// Lcd module connection
sbit LCD_RS at RB0_bit;
sbit LCD_EN at RB1_bit;
sbit LCD_D4 at RB2_bit;
sbit LCD_D5 at RB3_bit;
sbit LCD_D6 at RB4_bit;
sbit LCD_D7 at RB5_bit;

sbit LCD_RS_Direction at TRISB0_bit;
sbit LCD_EN_Direction at TRISB1_bit;
sbit LCD_D4_Direction at TRISB2_bit;
sbit LCD_D5_Direction at TRISB3_bit;
sbit LCD_D6_Direction at TRISB4_bit;
sbit LCD_D7_Direction at TRISB5_bit;
// End Lcd module connection
char text(int a){
     switch(a){
               case 0:
                    return '0';
               case 1:
                    return '1';
               case 2:
                    return '2';
               case 3:
                    return '3';
               case 4:
                    return '4';
               case 5:
                    return '5';
               case 6:
                    return '6';
               case 7:
                    return '7';
               case 8:
                    return '8';
               case 9:
                    return '9';
               }
     }

int second= 0;
int minute = 0;
int hour = 0;
void main() {
     char *time = "00:00:00";
     Lcd_Init();                                                  // Initialize Lcd module
     Lcd_Cmd(_LCD_CLEAR);                         // Clear Lcd display
     Lcd_Cmd(_LCD_CURSOR_OFF);               // Lcd cursor off
     Lcd_Out(1,3,"Developed By");
     Lcd_Out(2,1,"MINA TECHNOLOGY");
     delay_ms(2000);                                                 // 2second delay
     Lcd_Cmd(_LCD_CLEAR);                                 // Clear Lcd display
     Lcd_Out(1,3,"Digital Clock");
     hour = 1;
     while(1){
              second++;
              if(second>=60){
                             minute++;
                             second = 0;
                             }
              if(minute>=60){
                             hour++;                                           // Increase the hour value
                             minute = 0;                                      // Clear minute
                             }
              if(hour>=13) hour = 1;                                     // Reset hour
              time[0] =text(hour / 10);                                   // Left digit of hour
              time[1] =text(hour % 10);                               // Right digit of hour
              time[3] = text(minute / 10);                               // Left digit of minute
              time[4] = text(minute % 10 );                            // Right digit of minute
              time[6] = text(second / 10);                                // Left digit of second
              time[7] = text(second % 10);                             // Right digit of second
              Lcd_Out(2,4,time);                                        // show time value
              delay_ms(1000);                                              // 1s delay
              }

}