p11_2.c

单片机原理与应用实例教程 单片机原理与应用实例教程

#include "REG51.H"

unsigned char m0 = 0;
unsigned char m1 = 0;
unsigned char m2 = 0;
unsigned char m3 = 0;

unsigned char Disp[] = {	 
			0x40, 0x4F, 0x24, 0x30, 0x19,
			0x12, 0x02, 0x78, 0x00, 0x10 };

void  INT_0(void) interrupt 1
{
	m0 ++;
	if( m0 >= 10 )
	{
		m0 = 0;
		m1 ++;
		if( m1 >= 10 )
		{
			m1 = 0;
			m2 ++;
			if( m2 >= 6 )
			{
				m2 = 10;
				m3 ++;
				if(	m3 >= 10 )
					m3 = 0;
			}
		}
	}
	TH0	= 0x3c;
	TL0 = 0xb0;		
} 

void Delay()
{
	int i;
	for( i = 0; i < 0xff; i ++ )
	{
	}
}

main()
{
	TMOD = 0x01;
	TH0	= 0x3c;
	TL0 = 0xb0;
	EA	= 1;
	ET0	= 1;
	TR0	= 1;
	
	while(1)
	{
		P3 = 0x08;
		P0 = Disp[m0];
		Delay();

		P3 = 0x04;
		P0 = Disp[m1];
		Delay();
		
		P3 = 0x02;
		P0 = Disp[m2];
		Delay();

		P3 = 0x01;
		P0 = Disp[m3];
		Delay();
	}
}