STC89C52单片机实验 DAY 2 蜂鸣器

蜂鸣器发声

#include<reg52.h>
#include<intrins.h>

sbit beep=P1^5;
void delay(int i){
	while(i--);
}
void main()
{
	  while(1)
		{
			beep = ~beep;  //T=200WS
			delay(10);
		}
}

蜂鸣器天空之城

参考https://blog.csdn.net/u014751607/article/details/60318625

#include <reg52.h>
#define uchar unsigned char
#define uint unsigned int
sbit beep=P1^5;
unsigned int C;
#define L1 262         
#define L2 284
#define L3 311
#define L4 349
#define L5 392
#define L6 440
#define L7 494
#define Z1 523
#define Z2 587
#define Z3 659
#define Z4 698
#define Z5 784
#define Z6 880
#define Z7 987
#define H1 1046
#define H2 1174
#define H3 1318
#define H4 1396
#define H5 1567
#define H6 1760
#define H7 1975
void delay();
unsigned code GP[]={Z6,Z7,H1,Z7,H1,H3,Z7,Z3,Z6,Z5,Z6,H1,Z5,
                    Z3,Z3,Z4,Z3,H4,H1,Z3,H1,H1,Z7,Z4,Z4,Z7,
                    Z7,Z6,Z7,H1,Z7,H1,H3,Z7,Z3,Z6,Z5,Z6,H1,
                    Z5,Z2,Z3,Z4,H1,Z7,H1,H2,H2,H3,H1,H1,Z7,
                    Z6,Z6,Z7,Z5,Z6,H1,H2,H3,H2,H3,H5,H2,H1,
                    H1,Z7,H1,H3,H3,Z6,Z7,H1,Z7,H1,H2,H1,Z5,
                    Z5,H4,H3,H2,H1,H3,H3,H3,H6,H6,H5,H5,H3,
                    H2,H1,H1,H2,H1,H2,H5,H3,H3,H6,H6,H5,H5,
                    H3,H2,H1,H1,H2,H1,H2,Z7,Z6,Z6,0xff};
unsigned code JP[]={4,4,/**/12,4,8,8,/**/20,8,/**/12,4,8,8,
                    20,4,4,/**/12,4,8,8,/**/20,4,4,/**/12,4,8,8,
                    /**/20,4,4,/**/12,4,8,8,/**/20,8,/**/12,4,8,8,
                    /**/20,4,4,/**/8,4,12,3,1,/**/12,4,12,/**/4,4,
                    4,4,8,8,/**/20,4,4,/**/12,4,8,8,/**/24,/**/
                    8,4,4,8,8,/**/24,/**/4,4,8,4,4,8,/**/12,4,12,
                    /**/8,8,8,4,4,/**/16,8,/**/12,4,12,4,/**/4,4,12,8,
                    /**/12,4,8,8,/**/16,8,/**/12,4,12,4,/**/4,4,12,8,
                    /**/12,4,8,3,1,/**/32};
void main()
{ 
	uchar i,j;
	TMOD=0x00;
	EA=1;         //????
	ET0=1;        //?t0??
	while(1)
	{ 
		int i;
		i=0;
		while(GP[i]!=0xff)
		{
			C=460830/GP[i];
			TH0=(8192-C)/32;
			TL0=(8192-C)%32;
			TR0=1;//????0
			for(j=0;j<JP[i];j++)
				{delay();}
			TR0=0;
			i++;
		}
		beep=0;
	}
}

void delay()          //??15.6ms
{
	uint i,j;
	for(i=70;i>0;i--)
   	{
		for(j=110;j>0;j--);
	}
}
void T0_time()interrupt 1
{ 
	TR0=0;
	beep=!beep;
	TH0=(8192-C)/32;
	TL0=(8192-C)%32;
	TR0=1;
}