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#include<reg52.h>	   
#define uint unsigned int
unsigned int mouth=1;
unsigned char code SMG[18]=
{
0xc0,0xf9,0xa4,0xb0,0x99,0x92,
0x82,0xf8,0x80,0x90,0x88,0x80,
0xc6,0xc0,0x86,0x8e,0xbf,0x7f
};
void delay_SMG(uint time)
{
	uint i,j;
	for(i=time;i>0;i--)
		for(j=114;j>0;j--);
}
void SelectHC573(unsigned char n)
{
	switch(n)
	{
		case 4:
			P2=(P2 & 0x1f) | 0x80;
		break;
		case 5:
			P2=(P2 & 0x1f) | 0xa0;
		break;
		case 6:
			P2=(P2 & 0x1f) | 0xc0;
		break;
		case 7:
			P2=(P2 & 0x1f) | 0xe0;
		break;
	}
}
void Init()
{
	SelectHC573(5);
	P0=0x00;
	SelectHC573(4);
	P0=0xff;
}
void Show_SMG_Bit(unsigned char dat,unsigned char pos)
{
	SelectHC573(6);
	P0=0x01<<pos;
	SelectHC573(7);
	P0=dat;
}
void Show_SMG()
{
	Show_SMG_Bit(SMG[2],0);
	delay_SMG(10);
	Show_SMG_Bit(0xff,0);//消影
	Show_SMG_Bit(SMG[0],1);
	delay_SMG(10);
	Show_SMG_Bit(0xff,1);
	Show_SMG_Bit(SMG[2],2);
	delay_SMG(10);
	Show_SMG_Bit(0xff,2);
	Show_SMG_Bit(SMG[1],3);
	delay_SMG(10);
	Show_SMG_Bit(0xff,3);
	Show_SMG_Bit(0xbf,4);
	delay_SMG(10);
	Show_SMG_Bit(0xff,4);
	Show_SMG_Bit(0xbf,5);
	delay_SMG(10);
	Show_SMG_Bit(0xff,5);
	Show_SMG_Bit(SMG[mouth/10],6);
	delay_SMG(10);
	Show_SMG_Bit(0xff,6);
	Show_SMG_Bit(SMG[mouth%10],7);
	delay_SMG(10);
	Show_SMG_Bit(0xff,7);
}
void delay(uint time)
{
	while(time--)
	{
		Show_SMG();
	}
}
void main()
{
	Init();
	while(1)
	{
		Show_SMG();
		delay(100);
		mouth++;
		if(mouth>12)																 
		{
			mouth=1;
		}
	}
}