LED lights on and off to simulate the first sentence of Twinkle Twinkle Little Star

The first line of the famous song Twinkle Twinkle Little Star is 1 1 5 5 6 6 5, 4 4 3 3 2 2 1

Then we use the light-emitting diode D1 to replace 1, and so on.

#include "reg52.h"

typedef unsigned char u8;

typedef unsigned int u16;

sbit ledD1=P2^0; //P20

sbit ledD2=P2^1;

sbit ledD3=P2^2;

sbit ledD4=P2^3;

sbit ledD5=P2^4;

sbit ledD6=P2^5;

sbit ledD7=P2^6;

sbit ledD8=P2^7; //P27

void delay(u16 i) //delay function

{

while(i--)

{

//Do nothing

};

}

void main()

{

while(1)

{

//The first sentence of Twinkle Twinkle Little Star is 1 1 5 5 6 6 5 4 4 3 3 2 2 1

//Use the first light to represent 1, and so on

//1

ledD1=0;

delay(60000);

ledD1=1;

delay(60000);

//1

ledD1=0;

delay(60000);

ledD1=1;

delay(60000);

//5

ledD5=0;

delay(60000);

ledD5=1;

delay(60000);

//5

ledD5=0;

delay(60000);

ledD5=1;

delay(60000);

//6

ledD6=0;

delay(60000);

ledD6=1;

delay(60000);

//6

ledD6=0;

delay(60000);

ledD6=1;

delay(60000);

//5

ledD5=0;

delay(60000);

ledD5=1;

delay(60000);

delay(60000);

delay(60000);

//4

ledD4=0;

delay(60000);

ledD4=1;

delay(60000);

//4

ledD4=0;

delay(60000);

ledD4=1;

delay(60000);

//3

ledD3=0;

delay(60000);

ledD3=1;

delay(60000);

//3

ledD3=0;

delay(60000);

ledD3=1;

delay(60000);

//2

ledD2=0;

delay(60000);

ledD2=1;

delay(60000);

//2

ledD2=0;

delay(60000);

ledD2=1;

delay(60000);

//1

ledD1=0;

delay(60000);

ledD1=1;

delay(60000);

delay(60000);

delay(60000);

}

}