#include

#include

typedef unsigned int u16;

typedef unsigned char u8;

sbit butt = P3^2; //独立按键，连接了外部中断0

sbit RCLK = P3^5;

sbit SRCLK = P3^6;

sbit SER = P3^4; //HC595芯片

u8 code led_H[] = {0x7f,0xbf,0xdf,0xef,0xf7,0xfb,0xfd,0xfe};//点阵的列

u8 code ledL_I[] = {0x00,0x81,0x81,0xff,0xff,0x81,0x81,0x00}; //I的行的集合

u8 code ledL_LOVE[] = {0x30,0x78,0xfe,0x7f,0x7f,0xfe,0x78,0x30};//爱心的集合

u8 code ledL_U[] = {0x00,0xff,0xff,0x03,0x03,0xff,0xff,0x00}; //U的集合

u8 flag=0;// 标志位flag = 0;

void delay(u16 i) //延时函数

{

while(i--);

}

void HC595(u8 dat) //HC595芯片

{

u8 a;

RCLK = 0;

SRCLK = 0;

for(a=0;a<8;a++){

SER = dat>>7;

dat <<= 1;

SRCLK = 1;

_nop_();

_nop_();

SRCLK = 0;

}

RCLK = 1;

_nop_();

_nop_();

RCLK = 0;

}

void Int0_init() //提前把外部中断0的参数准备好

{

EA = 1;

IT0 = 1;

EX0 = 1;

}

void main() //主函数

{

Int0_init();

while(1){

u8 j;

switch(flag){ //switch语句

case 0:for(j=0;j<8;j++){

HC595(ledL_I[j]);

P0 = led_H[j];

delay(100);

HC595(0x00);

};break;

case 1:for(j=0;j<8;j++){

HC595(ledL_LOVE[j]);

P0 = led_H[j];

delay(100);

HC595(0x00);

};break;

case 2:for(j=0;j<8;j++){

HC595(ledL_U[j]);

P0 = led_H[j];

delay(100);

HC595(0x00);

};break;

}

}

}

void INT() interrupt 0

{

if(butt==0){

delay(1000);

if(butt==0){//按键按下

if(flag<2) flag++;

else flag=0;

}

}

}

//状态：I LOVE U（每按一下点阵就出来一个）