222.lst

PIC单片机串口通信的使用

     1: #include<pic.h>
     2: #define uchar unsigned char
     3: #define uint unsigned int
     4: void init()
     5: {
     6:         TRISB=0X00;
     7:         PORTB=0XFF;
     8:         TRISC=0xFF;
     9:         TXSTA=0XA4;
    10:         RCSTA=0X90;
    11:         SPBRG=25;
    12:         GIE=1;  
    13:         PEIE=1;
    14:         RCIE=1;
    15: } 
    16: void main()
    17: {
    18:         init(); 
    19:         while(1)
    20:         {
    21:                 TXREG='a';
    22:                 while(!TRMT);
    23:         }
    24: }
    25: void interrupt time()
    26: {
    27:         if(TRMT&RCIF)
    28:         {
    29:                 PORTB=RCREG;
    30:                 while(!TRMT);   
    31:         }
    32: }