case 0:
                          PORTB.F0 = ~PORTB.F0;
                          Duty_Cycle = 255;
                          delay_ms(20);PWM1_Start();delay_ms(10);PWM1_Stop();
                          break;

//  IR Receiver       //
//  PIC16F877A * 8MHz //
//    November 2012   //
////////////////////////

char  address_string[5]; // This string is used to display the address on LCD
char  command_string[5]; // This string is used to display the command on LCD
unsigned int count = 0 , temp = 0;
unsigned short i = 0, rec_bit = 0, command = 0, address = 0,  Data = 0, Duty_Cycle = 192;
void interrupt(){
count++;
TMR0 = 0;
INTCON.TMR0IF = 0;
}

unsigned int get_mark(){
TMR0 = 0;
count = 0;
while(!PORTB.F4);
return TMR0 + 256*count;
}

unsigned short get_Data(short n){
         Data = 0;
         for(i = 0;i<n;i++){
          temp = get_mark();
          if(temp<=700 && temp>=500) rec_bit = 0;
          else if(temp<=1300 && temp>=1100) rec_bit = 1;
          else{ i--;continue;}
          Data += rec_bit << i;
          }
         return Data;
         }
/************************************************************/
void main(){
TRISB = 0x10;
PORTB = 0x00;
TRISC = 0x00;
PORTC = 0x00;
TRISD = 0x00;
PORTD = 0x00;
OPTION_REG = 0x80;
INTCON = 0xA0;
LCD_Config(&PORTD,2,3,0,7,6,5,4);
LCD_CMD(LCD_CURSOR_OFF);
LCD_CMD(LCD_CLEAR);
LCD_Out(1,4,"Welcome :)");
PWM1_Init(38000);PWM1_Change_Duty(50);PWM1_Stop();
PWM2_Init(500);PWM2_Start();
while(1){
PWM2_Change_Duty(Duty_Cycle);
command = 0;
address = 0;
temp = get_mark();
if(temp>=2000 && temp<= 3000){
          command = get_Data(7);
          address = get_Data(5);
          if(address==1){

          switch(command){
                          case 0:
                          PORTB.F0 = ~PORTB.F0;
                          Duty_Cycle = 255;
                          delay_ms(20);PWM1_Start();delay_ms(10);PWM1_Stop();
                          break;
                          
                          case 1:
                          PORTB.F1 = ~PORTB.F1;
                          Duty_Cycle = 223;
                          delay_ms(20);PWM1_Start();delay_ms(10);PWM1_Stop();
                          break;
                          
                          case 2:
                          PORTB.F2 = ~PORTB.F2;
                          Duty_Cycle = 192;
                          delay_ms(20);PWM1_Start();delay_ms(10);PWM1_Stop();
                          break;
                          
                          case 3:
                          PORTB.F3 = ~PORTB.F3;
                          Duty_Cycle = 128;
                          delay_ms(20);PWM1_Start();delay_ms(10);PWM1_Stop();
                          break;
                          
                          default:
                          break;
                          }
                  }
          LCD_Out(1,1,"Address : ");
          LCD_Out(2,1,"Command : ");
          ShortToStr(address,address_string);
          LCD_Out(1,11,address_string);
          ShortToStr(command,command_string);
          LCD_Out(2,11,command_string);
           }
      }