text1.c

单片机快速入门原程序

#include <reg51.h>
#include<stdio.h>
sbit P10 = 0x90;
xdata	 char nIndex;
Delay();
main()
{ 
	SCON = 0x00;    /* 串行口还初始化位工作方式0*/
	ES=1;
	EA=1;		/* 全局中断允许 */
nIndex=1;
SBUF=nIndex;
//TI=1;
P10=0;
for(;;)
	{}

}


void Serial_Port() interrupt 4 using 0
{	
	if(TI==1)
	{
	P10=1;
	Delay();
	P10=1;
	nIndex<<=1;
if(nIndex==0) nIndex=1;
	SBUF=nIndex;

	}
	TI=0;
	RI=0;
}

Delay()
{int nCounter;
for(nCounter=0;nCounter<128;nCounter++);
}