Realize the countdown board display from 9 to 0 in 8×8 dot matrix based on C language

Based on C language, a countdown board display from 9 to 0 is realized in 8×8 dot matrix.

There is a 1 second interval between each number, which is implemented using a timer.

#include

sbit ADDR0 = P1^0;

sbit ADDR1 = P1^1;

sbit ADDR2 = P1^2;

sbit ADDR3 = P1^3;

sbit ENLED = P1^4;

code unsigned char image[10][8]={

{0xFF,0xC3,0xDB,0xDB,0xC3,0xDF,0xDF,0xC3}, //When the number 9 is to be displayed, the value of P0

{0xFF,0xC3,0xDB,0xDB,0xC3,0xDB,0xDB,0xC3},

{0xFF,0xC3,0xDF,0xDF,0xDF,0xDF,0xDF,0xDF}, //When the number 7 is to be displayed, the value of P0

{0xFF,0xFB,0xFB,0xFB,0xC3,0xDB,0xDB,0xC3},

{0xFF,0xC3,0xFB,0xFB,0xC3,0xDF,0xDF,0xC3},

{0xFF,0xDB,0xDB,0xDB,0xC3,0xDF,0xDF,0xDF},

{0xFF,0xC3,0xDF,0xDF,0xC3,0xDF,0xDF,0xC3},

{0xFF,0xC3,0xDF,0xDF,0xC3,0xFB,0xFB,0xC3},

{0xEF,0xE7,0xE3,0xE7,0xE7,0xE7,0xE7,0x81},

{0xFF,0xC3,0xDB,0xDB,0xDB,0xDB,0xC3,0xFF}

};

void main()

{

ENLED = 0; //Enable dot matrix

ADDR3 = 0;  

EA = 1; // Enable interrupt

ET0 = 1;   

TMOD = 0x01; //Timer initialization

TH0 = 0xFC;

TL0 = 0x67;

TR0 = 1;    

while(1);

}

void InterrupTimer0() interrupt 1

{

static unsigned long cnt = 0; //ms count

static unsigned char sec = 0; //s count

static unsigned char i = 0; //dot matrix row number

TH0 = 0xFC; //Reassign the timer to ensure that each time is 1ms

TL0 = 0x67;

cnt++;

if(cnt>=1000)

{

cnt = 0;

sec++;

if(sec>9)

{

sec = 0;

}

}

P0 = 0xFF; //Blanking

switch(i)

{

case 0 : ADDR2 = 0;ADDR1 = 0;ADDR0 = 0;i++;P0 = image[sec][0];break;

case 1 : ADDR2 = 0;ADDR1 = 0;ADDR0 = 1;i++;P0 = image[sec][1];break;

case 2 : ADDR2 = 0;ADDR1 = 1;ADDR0 = 0;i++;P0 = image[sec][2];break;

case 3 : ADDR2 = 0;ADDR1 = 1;ADDR0 = 1;i++;P0 = image[sec][3];break;

case 4 : ADDR2 = 1;ADDR1 = 0;ADDR0 = 0;i++;P0 = image[sec][4];break;

case 5 : ADDR2 = 1;ADDR1 = 0;ADDR0 = 1;i++;P0 = image[sec][5];break;

case 6 : ADDR2 = 1;ADDR1 = 1;ADDR0 = 0;i++;P0 = image[sec][6];break;

case 7 : ADDR2 = 1;ADDR1 = 1;ADDR0 = 1;i=0;P0 = image[sec][7];break;

default : break;

}

}