how to interface IR sensor (Tx-Rx pair) with PIC16F877A or 16F88?

  // char data1='x';
   //char data2='a';
   //char data3='1';
   int kp=0;
   char keypadPort at PORTD;
   char key[]="abcdefghijklmno";
void main()
{
  Keypad_Init();
  trisb=0b00000111;
  portb=0;
                                          // Initialize Keypad
        UART1_Init(1200);                 // Initialize UART module at 9600 bps
        Delay_ms(100);
                                          // Wait for UART module to stabilize
   while(1) 
           {
      do                                     // Store key code in kp variable
      kp = Keypad_Key_Click();             // Store key code in kp variable
    while (!kp);
    kp=key;
    UART1_Write(key);
    portb.f6=1;
       delay_ms(100);
     portb.f6=0;
             }
}

char uart_rd;
// LCD module connections
sbit LCD_RS at RB4_bit;
sbit LCD_EN at RB5_bit;
sbit LCD_D4 at RB6_bit;
sbit LCD_D5 at RB1_bit;
sbit LCD_D6 at RB2_bit;
sbit LCD_D7 at RB3_bit;

sbit LCD_RS_Direction at TRISB4_bit;
sbit LCD_EN_Direction at TRISB5_bit;
sbit LCD_D4_Direction at TRISB6_bit;
sbit LCD_D5_Direction at TRISB1_bit;
sbit LCD_D6_Direction at TRISB2_bit;
sbit LCD_D7_Direction at TRISB3_bit;
// End LCD module connections


void main()
 {
  trisb=0b00000000;
  trisc=0b11111000;
  portc=0;
  portb=0;
    UART1_Init(1200);                        // Initialize UART module at 9600 bps
    Delay_ms(100);                           // Wait for UART module to stabilize
    Lcd_Init();                        // Initialize LCD

    Lcd_Cmd(_LCD_CLEAR);               // Clear display
    Lcd_Cmd(_LCD_CURSOR_OFF);          // Cursor off

         //start:
      while (1)
           {                               // Endless loop
              if (UART1_Data_Ready())
             {
                uart_rd = UART1_Read();     // read the received data,
                delay_us(100);
               {
                if(uart_rd=='x')
                {
                    delay_ms(10);
                  portc.f0=!portc.f0;
                  // Lcd_Out(1,2,uart_rd);
                  Lcd_Chr_Cp(uart_rd);       //jekhane cursor ase sekhan thk lekha
                  delay_ms(2000);

                }
                if(uart_rd=='a')
                {
                    delay_ms(10);
                  portc.f1=!portc.f1;
                  // Lcd_Out(1,2,uart_rd);
                  Lcd_Chr_Cp(uart_rd);       //jekhane cursor ase sekhan thk lekha
                  delay_ms(2000);

                }
                if(uart_rd=='1')
                {
                    delay_ms(10);
                  portc.f2=!portc.f2;
                  // Lcd_Out(1,2,uart_rd);
                  Lcd_Chr_Cp(uart_rd);       //jekhane cursor ase sekhan thk lekha
                  delay_ms(2000);

                }
               }
              }
           }

}