lesson1.c

8051单片机学习源码 包括定时器、键盘、液晶显示等

#include<reg52.h>
sbit P11=P1^0;
unsigned char a,num;
void main()
{	
    num=0;
    EA=1;
	ET1=1;
	TMOD=0x10;
	TH1=(65536-50000)/256;
	TL1=(65536-50000)%256;
	TR1=1;
	while(1)
		{
			if(num==2)
			{  
				num=0;
				P11=~P11;
		 	}
		}
}

void time1() interrupt 3 using 1
{
	TH1=(65536-50000)/256;
	TL1=(65536-50000)%256;
	num++;
}