电路原理图如下：

单片机程序源码:

#include //头文件
#include
#define uint unsigned int //宏定义
#define uchar unsigned char
sbit SW1 =P1^0; //按键1
sbit SW2 =P1^1; //按键2
sbit SW3 =P1^2; //按键3
sbit SW4 =P1^3; //按键4
uint num;
uchar huayang1[]={0xfe,0xfc,0xf8,0xf0,0xe0,0xc0,0x80,0x00,0xff};
uchar huayang2[]={0xfe,0xfd,0xfb,0xf7,0xef,0xdf,0xbf,0x7f};
uchar huayang3[]={0xaa,0x55,0xfb,0xf7,0xef,0x39,0xf1,0xe5,0x02,0xe3,0x2c,};
void delay(uint S)
{
while(S--);
}

void ms()
{
uint i;
for(i=0;i<200;i++)
{
delay(200);
}
}

void main()
{
while(1)
{

if(SW1==0)
{
delay(10);
if(SW1==0)
{
while(!SW1);
while(1)
{
for(num=0;num<9;num++)
{
P0=huayang1[num];P2=~huayang1[num];
ms();
}
}
}
}

if(SW2==0)
{
delay(10);
if(SW2==0)
{
while(!SW2);
while(1)
{
for(num=0;num<8;num++)
{
P0=0xff;P2=0;
ms();
P0=huayang2[num]; P2=~(0x55 & huayang2[num]);
ms();
}


}
}
}
if(SW3==0)
{
delay(10);
if(SW3==0)
{
while(!SW3);
while(1)
{
for(num=0;num<11;num++)
{

P0=huayang3[num]; P2=~(0xaa & huayang3[num]);
ms(); ms();
if(SW1==0||SW2==0||SW3==0||SW4==0)
break;
}


}
}
}
}
}