單片機與232串口通訊

程序：

#include
void UART_init(); //串口初始化函數
void COM_send(void); //串口發(fā)送函數
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; //選擇串口工作方式1
TMOD =0x20; //定時(shí)器1工作在方式2
TH1 =0xfA;
TL1 =0xfA; //9600
PCON=0x80;TR1 =1;
ES=1; //允許串行口中斷
}
//發(fā)送----------------------------------------------------------------
void COM_send(void)
{
unsigned char point = 0;
for(point=0;point<4;point++)
{
SBUF=str[point];
delay();
while(!TI) ;
TI=0;
}
}