一个子程序

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串口

chy713

<>#include&lt;reg52a.h&gt;
/*#include &lt;AT89X52.H&gt;*/</P><>#define uchar unsigned char
#define uint unsigned int </P><>void serial () interrupt 4
{
uchar aa;
while(RI==0);
RI=0;
aa=SBUF;
SBUF=aa;
while(TI==0);
TI=0;
}</P><P>void main()
{

TMOD=0x20;  /*model 2,T1*/
TH1=0xfd;  /*baud rate is 9600,11.0592HZ */
TL1=0xfd;
TCON=0x40;  /*start T1*/
SCON=0x50;  /*receive permission*/
PCON=0x00;
IE=0x99;  /*enable EA,ES,ET1,EX0*/
while(1);
}</P>