源代码：

#include <reg51.h>

//void delay_ms(int xms)

//{

// int k,j;

// for(k = 0; k < xms; k++)

// for(j = 0; j < 125; j++);//1ms

//}

void init(void)

{

TMOD = 0X20;

SCON = 0X50;

PCON = 0X00;

TL1 = 0XFD;

TH1 = 0XFD; //11.0592M 9600

TR1 = 1;

}

void main(void)

{

unsigned char dat;

init();

while(1)

{

  if(RI)

{

dat = SBUF;

SBUF = dat;

while(TI == 0);

TI = 0;

RI = 0;

}

}

}