Multiplexing seven segment

Proteus Simulation on four seven segment multiplexing

Code: upcounter on seven segments


#include <REGX51.H>

#define seg_data P2

sbit seg1=P3^3;
sbit seg2=P3^2;
sbit seg3=P3^1;
sbit seg4=P3^0;

int num=0;
int  ones=0,tens=0,hundreds=0,thousands=0;
void display_digit(unsigned char c);

void delay(int x);
void display(int);



void main()
{
  int num,j;
 
  while(1)
  {
  for(num=0;num<10000;num++)
  {
  for(j=0;j<60;j++)

  display(num);


  }
  }
 }

void delay(int x)
{
int i;
for(i=0;i<x;i++);
}

void display(int num)
{
ones=num%10;
tens=(num/10)%10;
hundreds=(num/100)%10;
thousands=(num/1000);

display_digit(ones);
seg1=0;
delay(50);
seg1=1;

display_digit(tens);
seg2=0;
delay(50);
seg2=1;

display_digit(hundreds);
seg3=0;
delay(50);
seg3=1;

display_digit(thousands);
seg4=0;
delay(50);
seg4=1;
}

void display_digit(unsigned char c)
{
switch(c)
{
case 0:
seg_data=0x3f;
break;

case 1:
seg_data=0x06;
break;

case 2:
seg_data=0x5b;
break;

case 3:
seg_data=0x4f;
break;

case 4:
seg_data=0x66;
break;

case 5:
seg_data=0x6d;
break;

case 6:
seg_data=0x7d;
break;

case 7:
seg_data=0x07;
break;

case 8:
seg_data=0x7f;
break;

case 9:
seg_data=0x6f;
break;
}
}