/* P0控制行  8*8从上到下控制行的是P0.7.....P0.0 高电平亮

P2控制列  8*8点阵从左至右控制列的是P2.7，P2.6...P2.0 高电平灭  */

#include<reg52.h>

typedef unsigned char u8;

typedef unsigned int u16;

sbit beep=P3^7;

u8 h[][8]={{0x00,0x70,0x78,0x3c,0x1e,0x3c,0x78,0x70},

{0x00,0xe0,0xf0,0x78,0x3c,0x78,0xf0,0xe0}}; //爱心

u8 l[]={0x7f,0xbf,0xdf,0xef,0xf7,0xfb,0xfd,0xfe};//列扫描

u8 k;

void time0init()  //定时器0初始化

{

TMOD=0X01;

TH0=0Xfc;

TL0=0X18;  //1ms

TR0=1;

EA=1;

ET0=1;

}

void main()

{

time0init();

while(1);

}

void time0() interrupt 1

{

static u16 i,j;

TH0=0Xfc;

TL0=0X18;  //1ms

i++;

if(i==800)

{

i=0;

k++;

if(k==2)k=0;

beep=~beep;

}

P0=h[k][j];

P2=l[j];

j++;

if(j==8)j=0;

}