A piece of music composed by buzzer (Chengdu)

The code and simulation can be downloaded through the following link

Resource link : Click to download Download free

Simulation diagram

The buzzer adopts passive buzzer speaker, You can change the pronunciation frequency by timing the timer .
By querying the frequency corresponding to the scale , Make different timing , Produce different frequencies . Then match the score , You can play music .
The operation is relatively simple .

#include<reg51.h>
sbit P10=P1^0;
sbit P17=P1^7;
void delay(unsigned char k){
    
	unsigned char h,i,j;
	for(h=0;h<k;h++){
    
		for(i=0;i<25;i++){
    
			for(j=0;j<20;j++);
		}
	}
}
/**delay Method introduction  * Functional specifications : * It can be used for program delay  * The delay duration is determined by the incoming parameters  * The unit of the passed in parameter is ms * Such as the input “1” For delay 1ms * And so on  */
void speaker(unsigned int SSC,unsigned int fre){
    
	unsigned int j=fre;
	TMOD=0x11;			
	TR0=1;
	TR1=1;	
	EA=1;
	ET0=1;
	ET1=1;		
	P10=1;				
	TH0=SSC/256;
	TL0=SSC%256;
	TH1=60928/256;
	TL1=60928%256;
	while(j>0){
    
		while(TF1==0){
    			
			while(TF0==0){
    
				;	
			}
			TR0=0;			
			TH0=SSC/256;
			TL0=SSC%256;
			P10=~P10;
			TR0=1;
			TF0=0;
		}
		TH1=60928/256;
		TL1=60928%256;
		TF1=0;
		j--;
		TF1=0;
	}
	j=fre;
}
void musician(unsigned int tone,unsigned int duration){
    
	unsigned int box1[]={
    
		0,63628,63835,64021,64103,64260,64400,64524,
		// low 1(1)  low 2(2)  low 3(3)  low 4(4)  low 5(5)  low 6(6)  low 7(7) 
		64580,64680,64750,64800,64898,64968,65030, 
		// in 1(8)  in 2(9)  in 3(10)  in 4(11)  in 5(12)  in 6(13)  in 7(14)
		65058,65110,65160,65178	
		// high 1(15)  high 2(16)  high 3(17)  high 4(18)
	};
	unsigned int box2[]={
    
		0,/*1*/30,/*2*/60,90,/*4*/120,150,/*6*/150,210,240,270,300,
		// Time value 
		//0.1S(1)~1S(10)


	};
	speaker(box1[tone],box2[duration]);
	P10=1;
	delay(20);		
}
void main(){
    
	while(P17==0){
    
		musician(12,6);
		musician(12,2);
		musician(10,2);
		musician(12,2);
		musician(13,4);
		musician(13,2);
		musician(10,4);
		musician(9,2);
		musician(8,2);
		musician(5,1);
		musician(6,1);
		musician(8,2);
		musician(9,2);
		musician(10,2);
		musician(9,2);
		musician(10,6);
		musician(12,6);
		musician(12,2);
		musician(10,2);
		musician(12,2);
		musician(13,4);
		musician(13,2);
		musician(10,4);
		musician(9,2);
		musician(8,2);
		musician(5,1);
		musician(6,1);
		musician(8,2);
		musician(9,2);
		musician(12,2);
		musician(9,2);
		musician(8,6);
		musician(12,2);
		musician(10,2);
		musician(9,2);
		musician(8,6);
		musician(5,4);
	}	
}