unsigned int x=0;
 char flag_ir=0 , kk=0;
 sbit led at RB0_bit;
 sbit led_dir at trisB0_bit;
 sbit reciver at RB4_bit; 
 sbit reciver_dir at trisB4_bit; 
 sbit relay at RB5_bit;
 sbit relay_dir at trisB5_bit;
void send_signal();
 void main() 
 { 
  cmcon=7; 
  reciver_dir=1;
  led_dir=0; 
  led=0; 
  relay_dir=0;
   relay=0;
  PWM1_Init(38000);//38khz
  PWM1_Set_Duty(127); // set duty 50%
  for (x=0;x<10;x++) // flashing for check is micro is ok init. 
         { led=1; 
          delay_ms(100);
          led=0;
          delay_ms(100);
          } 
   while(1) 
         { 
           send_signal();
          if(flag_ir==6)
              {

                 led=1;
                relay=1;
               flag_ir=0;
               for(x=0;x<60;x++)delay_ms(1000);// wait 60 sec ;
               led=0;
              relay=0;
              }

         }
}
 //*********************************** 
 void send_signal() 
 { 
  flag_ir=0; // intial value
  while(1) 
        { 
         PWM1_Start(); 
         delay_ms(20); 
         if(reciver==0) flag_ir=0; 
         else flag_ir++; 
         PWM1_Stop(); 
         delay_ms(20); if(flag_ir==6)break; 
         } 
       }