How to display numbers on 7 segment display using 8051 microcontroller?

When using a single-chip microcomputer to develop a project, a 7-segment display is often used. The 7-segment display can display letters and numbers. It actually has a light-emitting LED inside. By controlling different interfaces, the internal LED lights are lit to display numbers. At present, it is used to display information in many electronic products, such as power banks, hair straighteners, etc.

The 7-segment display is constructed of 8 LEDs connected in a sequential manner to facilitate displaying the digits from 0 to 9 when certain combinations of LEDs are turned on. When lit, it displays only one digit at a time.

Schematic diagram of displaying numbers on a 7-segment display using an 8051 microcontroller:

The program to display numbers from "0 to F" on a 7-segment display is:

#include< reg51.h > 
sbit a= P3^0; 
sbit x = P3^1;
sbit y = P3^2;
sbit z = P3^3;
void main()
{
unsigned char m[10]={0x40,0xF9,0x24,0x30,0x19,0x12,0x02,0xF8,0xE00,0x10};
unsigned int i,j;
a=x=y=z=1;
while(1)
{
for(i=0;i<10;i++)
{
P2=m[i];
for(j=0;j<60000;j++);
}
}
}
The program to display numbers from "00 to 10" on a 7-segment display is:

#include< reg51.h >
sbit x = P3^0;
sbit y = P3^1;
void display1();
void display2();
void delay();
void main()
{
unsigned char m[10]={0x40,0xF9,0x24,0x30,0x19,0x12,0x02,0xF8,0xE00,0x10};
unsigned int i,j;
ds1=ds2=0;
while(1)
{
for(i=0,i<20;i++)
display1();
display2();
}
}
void display1()
{
x=1;
y=0;
P2=m[ds1];
delay();
x=1;
y=0;
P2=m[ds1];
delay();
}
void display2()
{
ds1++;
if(ds1 >=10)
{
ds1=0;
ds2++;
if(ds2 >=10)
{
ds1=ds2=0;
}
}
}
void delay()
{
unsigned int k;
for(k=0;k<30000;k++);
}