51 MCU matrix button circuit diagram + program-EEWORLD

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The following is the circuit diagram of the digital tube part: The following is the circuit diagram of the matrix keyboard part: The C51 microcontroller program is as follows:

#include

#define uchar unsigned char

#define uint unsigned int

//Segment code of digital tube

uchar table[16] = {0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71};

fly seg[4]={0xfe,0xfd,0xfb,0xf7};

this is flying;

void Delay_1ms(uint i) //1ms delay

{

fly x,j;

for(j=0;j

for(x=0;x<=148;x++);

}

void keyboard()

{

fly x,y,i;

for(y=0;y<4;y++)

{

P1=seg[y];

if((P1&0xf0)!=0xf0)

{

Delay_1ms(5);

if((P1&0xf0)!=0xf0)

{

x=P1&0XF0;

x=(x>>4)|0xf0;

for(i=0;i<4;i++)

{

if(x==seg[i])

{

x=i;

shu=4*y+x+1;

}

void segdisplay(float i)

{

P0 = 0; //Blanking

P2 = 6; //The 7th digital tube display

P0 = table[(i / 10)%10]; //Get the tens digit of i here

Delay_1ms(5); //Display the next number after 0.5 seconds delay

P0 = 0; //Blank

P2 = 7; //The 8th digital tube display

P0 = table[i % 10]; //Get the unit digit of i here

Delay_1ms(5);

P0=0;

}

void main()

{

this = 0;

while(1)

{

keyboard();

segdisplay(shu);

}

Reference address：51 MCU matrix button circuit diagram + program

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