The microcontroller drives the dot matrix to flow upward to display the beautiful heart shape of I Love U -Love

/**
*Function: The dot matrix flows upward to display I Love U -Love is a beautiful heart shape
*Time: March 10, 2014 16:19:14
*Author: Han Zhuzi
*Remarks: Animation display principle: The animation is formed by 32 pictures, one frame is refreshed every millisecond, and one frame changes every 250ms, for a total of 32 frames.
**/

#include

typedef unsigned int uint;
typedef unsigned char uchar;

//74HC138
sbit ADDR0 = P1^0;
sbit ADDR1 = P1^1;
sbit ADDR2 = P1^2;
sbit ADDR3 = P1^3;
sbit ENLED = P1^4;

//I Love U modulo encoding
uchar code table[] = {/*width 8, height 40*/
0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,//Start all black
0xFF,0xC3,0xE7,0xE7,0xE7,0xE7,0xC3,0xFF,//I
0xFF,0x99,0x00,0x00,0x00,0x81,0xC3,0xE7,//heart
0xFF,0x99,0x99,0x99,0x99,0x99,0x81,0xC3,//U
0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF//Blanking, remove garbled characters
};

uchar counter = 0, index = 0; //Image refresh index (to refresh 32 images, each with an interval of 250ms)

void timer0_init();
void HC138_init();

void main(void)
{
timer0_init();
HC138_init();

while (1);
}

/********timer0 init**********/
void timer0_init()
{
TMOD |= 0x01; //T1 mode 1
TH0 = 0xFC;
TL0 = 0x67; //Load initial value, timing 1ms
TR0 = 1; //start T0
EA = 1; //Open total interrupt
ET0 = 1; //Open timer T0 interrupt
}

/**********74HC138 init************/
void HC138_init()
{
ADDR3 = 0;
ENLED = 0; // Enable U4
}

/**************timer0 interrupt**************/
void timer0_int() interrupt 1
{
static uchar j = 0; //Used to refresh each frame of the picture, the animation consists of 32 pictures

TH0 = 0xFC;
TL0 = 0x67;//1ms
counter++;//ms++
P0 = 0xFF;//blanking

//Dynamic refresh (refresh each frame)
switch (j)
{
case 0: ADDR2 = 0; ADDR1 = 0; ADDR0 = 0;
break;
case 1: ADDR2 = 0; ADDR1 = 0; ADDR0 = 1;
break;
case 2: ADDR2 = 0; ADDR1 = 1; ADDR0 = 0;
break;
case 3: ADDR2 = 0; ADDR1 = 1; ADDR0 = 1;
break;
case 4: ADDR2 = 1; ADDR1 = 0; ADDR0 = 0;
break;
case 5: ADDR2 = 1; ADDR1 = 0; ADDR0 = 1;
break;
case 6: ADDR2 = 1; ADDR1 = 1; ADDR0 = 0;
break;
case 7: ADDR2 = 1; ADDR1 = 1; ADDR0 = 1;
break ;
default: break;
}
P0 = table[index + j++]; //Dynamically refresh each frame of the picture

if (j >= 8)
{
j = 0;
}

//Change frame
if (counter >= 250)
{
counter = 0;
index++;//Number of frames++
if (index >= 32)
{
index = 0;//Maximum 32 frames of images
}
}
}