89c52串口发送接收小示例

//串口发送

void sendChar(char *p)//调用前关中断，调用完成后关中断

{

 while(*p != '\0')

 {

  SBUF = *P

  while(!TI);

  

  TI = 0;

  p++;

 }

}

 

//串口接收

//串口初始化

void series_init()

{

 SCON = 0x50; //串口工作方式1，允许接受

 TMOD = 0x20; //定时器T1工作方式2

 TH1 = 0xfd;TL1 = 0xfd; //定时初值

 PCON &= 0x00; //smod = 0

 TR1 = 1； //开启定时器1

 EA = 1;ES = 1; //开总中断可串行终端

}

 

unsigned char ReceiveBuf;

//串行中断服务函数

void series() interrupt 4

{

 RI = 0;

 ReceiveBuf = SBUF;

 /*

  do something;

 */

}