C51单片机中的三种方法解决数码管的动态显示，使数码管显示1-8数字。三种方法的代码如下，此时读者需要十分注意你代码中引脚的先后顺序，否则可能达不到预期的效果.

#include

#define uchar unsigned char

#define uint unsigned int

uchar code seg1[]={0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80}; //使用的是共阳极数码管

void delayms(uint i)

{

uchar j;

while(i--)

for(j=0;j<=125;j++);

}

void main()

{

while(1)

{

uchar i,j;

P2=0x80;

for(i=0;i<8;i++)

{

P2=_crol_(P2,1);

P0=seg1[i];

delayms(1);

}

}

}

#include

#define uchar unsigned char

#define uint unsigned int

uchar code seg1[]={0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80}; //使用的是共阳极数码管

uchar code seg2[]={0x01,0x02,0x04,0x08,0x10,0x20,0x40,0x80};

void delayms(uint i)

{

uchar j;

while(i--)

for(j=0;j<=125;j++);

}

void main()

{

while(1)

{

uchar i;

for(i=0;i<8;i++)

{

P2=seg2[i];

P0=seg1[i];

delayms(1);

}

}

#include

#define uchar unsigned char

#define uint unsigned int

//uchar code seg1[]={0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80}; //使用的是共阳极数码管

//uchar code seg2[]={0x01,0x02,0x04,0x08,0x10,0x20,0x40,0x80};

void delayms(uint i)

{

uchar j;

while(i--)

for(j=0;j<=125;j++);

}

void main()

{

while(1)

{

P2=0x01;

P0=0xf9;

delayms(1);

P2=0x02;

P0=0xa4;

delayms(1);

P2=0x04;

P0=0xb0;

delayms(1);

P2=0x08;

P0=0x99;

delayms(1);

P2=0x10;

P0=0x92;

delayms(1);

P2=0x20;

P0=0x82;

delayms(1);

P2=0x40;

P0=0xf8;

delayms(1);

P2=0x80;

P0=0x80;

delayms(1);

}

}

仿真图如下：