1: #include<pic.h>

     2: #define uchar unsigned char

     3: #define uint unsigned int

     4: __CONFIG(0x3B31);

     5: void init()

     6: {

     7:         TRISC=0XFF;

     8:         TRISB=0XFF;

     9:         TRISD=0X00;

    10:         PORTD=0X00;

    11:         TXSTA=0XA4;

    12:         RCSTA=0X90;

    13:         SPBRG=25;

    14:         GIE=1;

    15:         PEIE=1;

    16:         RCIE=1;

    17: }  

    18: void main()

    19: {

    20:         init(); 

    21:         while(1)

    22:         {

    23:                 TXREG=PORTB;

    24:                 while(!TRMT);

    25:         }

    26: 

    27: }

    28: void interrupt time()

    29: {

    30:         if(TRMT&RCIF)

    31:         {

    32:                 PORTD=RCREG;

    33:                 while(!TRMT);

    34:         }

    35: }