#include<reg52.h>

#define uint unsigned int

void delay7ms(void) //误差 -0.217013888891us

{

unsigned char a,b;

for(b=208;b>0;b--)

for(a=14;a>0;a--);

}

void delay2ms(void) //误差 -0.217013888889us

{

unsigned char a,b;

for(b=80;b>0;b--)

for(a=10;a>0;a--);

}

void main(void)

{

uint led[10]={0xc0,0xf9,0xa4, 0xb0,0x99,0x92,0x82,0xf8,0x80,0x90};

uint m,n=0,a=0;

for(m=0;m<=10;m++)

{

while(a<30)

{

if(m==10)

{

m=0;

n++ ;

if(n==10)

n=0;

}

P0=led[m];

P2=0x40;

delay7ms();

P2=0x00;

delay2ms();

P0=led[n];

P2=0x80;

delay7ms();

P2=0x00;

delay2ms();

a++;

}

a=0;

}

}