89c52串口發送接收小示例

//串口發送

void sendChar(char *p)//調用前關中斷，調用完成後關中斷  
{ 
 while(*p != '\0') 
 { 
  SBUF = *P 
  while(!TI); 
   
  TI = 0; 
  p++; 
 } 
} 

void sendChar(char *p)//調用前關中斷，調用完成後關中斷
{
 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，允許接受  
 TMOD = 0x20; //定時器T1工作方式2  
 TH1 = 0xfd;TL1 = 0xfd; //定時初值  
 PCON &= 0x00; //smod = 0  
 TR1 = 1； //開啟定時器1  
 EA = 1;ES = 1; //開總中斷可串行終端  
} 

void series_init()
{
 SCON = 0x50; //串口工作方式1，允許接受
 TMOD = 0x20; //定時器T1工作方式2
 TH1 = 0xfd;TL1 = 0xfd; //定時初值
 PCON &= 0x00; //smod = 0
 TR1 = 1； //開啟定時器1
 EA = 1;ES = 1; //開總中斷可串行終端
}

unsigned char ReceiveBuf;
//串行中斷服務函數 
void series() interrupt 4
{
RI = 0;
ReceiveBuf = SBUF;
/*
  do something;
*/
}

unsigned char ReceiveBuf;
//串行中斷服務函數
void series() interrupt 4
{
RI = 0;
ReceiveBuf = SBUF;
/*
  do something;
*/
}