timer doing.c

一个定时器中断的应用 AT89s51定时器 C51编写

#include<reg51.h>
#include<intrins.h>
#define uint unsigned int
#define uchar unsigned char
uchar liushuideng,flag_timer0,flag_timer1,flag_stop,flag_end,yi,wan,qian,bai,shi,ge;
uint date;
uchar code led_duan[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71};
void init();
void delay(uint);
void display(uchar,uchar,uchar,uchar,uchar,uchar);
void main()
{
	init();
	while(1)
	{
		bai=date/100;
		shi=date%100/10;
		ge=date%10;
		if(flag_end==1)
		{
			display(16,17,18,18,19,20);
		}
		else display(7,6,5,bai,shi,ge);
		if(flag_stop==1)
		{
			TH0=(65536-46230)/256;
			TL0=(65536-46230)%256;
			TR0=1;
			while(1)
			{
				delay(30);
				liushuideng=~liushuideng;
				P1=liushuideng;
			}
		}
	}
		
}
void init()
{
	bai=0;
	shi=0;
	ge=0;
	date=432;
	flag_timer0=0;
	flag_timer1=0;
	flag_stop=0;
	flag_end=0;
	liushuideng=0xfe;
	P1=liushuideng;
	TMOD=0x11;
	TH0=(65536-46230)/256;
	TL0=(65536-46230)%256;
	TH1=(65536-46230)/256;
	TL1=(65536-46230)%256;
	EA=1;
	ET0=1;
	ET1=1;
	TR0=1;
	TR1=1;

}
void timer0() interrupt 1
{
	TH0=(65536-46230)/256;
	TL0=(65536-46230)%256;
	flag_timer0++;
	if(flag_stop==0)
	{
		if(flag_timer0==10)
		{
			flag_timer0=0;
			liushuideng=_crol_(liushuideng,1);
			P1=liushuideng;
		}
	}
	else
	{
		if(flag_timer0==60)
			{
				flag_timer0=0;
				P1=0xff;
				flag_stop=0;
				TR0=0;
				flag_end=1;
			}	
	}		
}
void timer1() interrupt 3
{
	TH1=(65536-46230)/256;
	TL1=(65536-46230)%256;
	flag_timer1++;
	if(flag_timer1==2)
	{
		flag_timer1=0;
		date--;
		if(date==398)
		{
			TR0=0;
			P1=0xff;
			flag_stop=1;
			TR1=0;
		}


	}		
}
void delay(uint a)
{	
	uchar b;
	while(a--)
	{
		for(b=0;b<123;b++);
	}
}
void display(uchar yi,uchar wan,uchar qian,uchar bai,uchar shi,uchar ge)
{
	P0=led_duan[yi];
	P2=0xdf;
	delay(5);

	P0=led_duan[wan];
	P2=0xef;
	delay(5);

	P0=led_duan[qian];
	P2=0xf7;
	delay(5);
	P0=led_duan[bai];
	P2=0xfb;
	delay(5);

	P0=led_duan[shi];
	P2=0xfd;
	delay(5);

	P0=led_duan[ge];
	P2=0xfe;
	delay(5);
}