单片机与232串口通讯

程序：

#include
void UART_init();                //串口初始化函数
void COM_send(void);             //串口发送函数
char str[40]= 'welcome';   //{0x00,0x10,0xa0,0xb1};                        
//-----------------------------------------------------
void delay(void)
{ unsigned char j,k;
    for(j=0;j<200;j++)
    for(k=0;k<200;k++);
}
//-----------------------------------------------------------
void main(void)
{
  UART_init();         

  while(1)
   {
    COM_send();}
}

//--------------------------------------------------------------
void UART_init()
{                        
SCON =0x50;           //选择串口工作方式1
TMOD =0x20;           //定时器1工作在方式2
TH1 =0xfA;
TL1 =0xfA;           //9600       
PCON=0x80;                                                                                    TR1 =1;      
ES=1;               //允许串行口中断            
}
//发送----------------------------------------------------------------
void COM_send(void)
{
    unsigned char point = 0;
    for(point=0;point<4;point++)
   {
     SBUF=str[point];
     delay(); 
    while(!TI) ;
     TI=0;
   } 
}