51单片机数码管动态显示

#include<reg52.h>

#define Dataport P0

sbit   Latch_seg = P2^2; //段

sbit   Latch_bit = P2^3; //位

unsigned char arr_bit[8] = {0xfe,0xfd,0xfb,0xf7,0xef,0xdf,0xbf,0x7f};

unsigned char arr_seg[16] = {0x3F,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x77,0x7C,0x39,0x5E,0x79,0x71};

void display(unsigned char startnum,unsigned char num);

void display1();

void add(unsigned char startnum);

void delay(unsigned char n)

{
unsigned int i,j;
for( i = n; i > 0; i--)
for( j = n; j > 0; j--);

}

int main()

{
Latch_seg = 0;
Latch_bit = 0;
//display(5,6);
//display1();
add(1);
return 0;

}

void display(unsigned char startnum,unsigned char num)

{

  unsigned int i;
unsigned char temp;
temp = 0x01;
for( i = 0; i < num; i++)
{

Dataport = ~temp;
temp <<= 1; 
Latch_bit = 1;
Latch_bit = 0;
Dataport = arr_seg[i+startnum];
Latch_seg = 1;
Latch_seg = 0;
delay(10);
}

}

void display1()

{

  unsigned int i,j,k;
unsigned char temp;
temp = 0x01;
j = 0;
i = 0;
k = 0;

 while(1)
{
Dataport = arr_bit[i]; 
Latch_bit = 1;
Latch_bit = 0;
Dataport = arr_seg[(i+j)%16];
Latch_seg = 1;
Latch_seg = 0;
delay(10);
i++;
k++;
if(k == 500)
{
k = 0;
j++;
}
if(i == 8)
i = 0;

}

}

void add(unsigned char startnum)

{
unsigned int i,j;
while(1)
{

  i++;
if(!(i % 500))
{
j++;
}
Dataport = 0xfe;
Latch_bit = 1;
Latch_bit = 0;
Dataport = arr_seg[(j)%10];
Latch_seg = 1;
Latch_seg = 0;
delay(10);
}

}