The digital tube display based on the single chip microcomputer realizes the self-adding function

This article mainly introduces the self-increment function of the digital tube display based on the MCS-51 single-chip microcomputer, which displays from 1 to 999. The following is the hardware circuit diagram, function implementation diagram and source code. (Circuit: Use 74HC573 latch to control segment selection, 74H138 to control bit selection;)

Code to realize self-addition of digital tube:

#include

#define uchar unsigned char

#define uint unsigned int

uchar code table[16] = {0x3f,0x06,0x5b,0x4f,

0x66,0x6d,0x7d,0x07,0x7f,

0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71}; //Display digital table

uchar flag,bai,shi,ge;

uint temp;

void xunhuan();

void delay(uint z);

void init();

void main()

{

init();

while(1)

{

if(flag==20)

{

flag=0;

temp++;

if(temp==1000)

{

temp=0;

}

}

bai=temp/100;

shi=temp%100/10;[page]

ge=temp%10;

xunhuan();

}

}

void xunhuan()

{

P2=0;

P0=table[bai];

delay(30);

P2=1;

P0=table[shi];

delay(30);

P2=2;

P0=table[ge];

delay(30);

}

void init()

{

TMOD=0x01; //Timer 0

TH0=(65536-50000)/256; //timing 50ms

TL0=(65536-50000)%256;

EA=1;

ET0=1;

TR0=1;

}

void timer0() interrupt 1

{

TH0=(65536-50000)/256; //timing 50ms, 1m=1000ms=20*50ms

TL0=(65536-50000)%256;

flag++;

}

void delay(uint z)

{

uchar x,y;

for(x=z;x>0;x--)

for(y=110;y>0;y--);

}