【STC单片机学习】第十一课：蜂鸣器

【朱老师课程总结侵删】

第一部分、章节目录

1.11.1.蜂鸣器的原理

1.11.2.让蜂鸣器响起来

1.11.3.用定时器控制蜂鸣器音调

1.11.4.蜂鸣器发出滴滴声

1.11.5.让蜂鸣器唱歌1

1.11.6.让蜂鸣器唱歌2

第二部分、章节介绍

1.11.1.蜂鸣器的原理
   本节从工作原理、分类上讲解了无源蜂鸣器和有源蜂鸣器2种的发声原理和所需要的控制信号特性，为驱动蜂鸣器做理论积累。
1.11.2.让蜂鸣器响起来
   本节用最简单的代码让蜂鸣器响起来，主要目的是验证上节的理论。
1.11.3.用定时器控制蜂鸣器音调
   本节用定时器定时间来控制蜂鸣器发出不同音调的声音，主要让大家提升编程功底的同时，理解定时时间、蜂鸣器音调等几个因素之间的关联性。
1.11.4.蜂鸣器发出滴滴声
   本节在上节基础上，增加代码实现蜂鸣器发出滴滴声。
1.11.5.让蜂鸣器唱歌1
   本节讲解蜂鸣器唱歌的原理，以及乐谱如何转化成为音乐数据。
1.11.6.让蜂鸣器唱歌2
   本节对写好的蜂鸣器唱歌程序进行分析理解，目的是让大家能够读懂这段代码。

第三部分、随堂记录

1.11.1.蜂鸣器的原理

1.11.1.1、蜂鸣器简介
(1)分类：无源蜂鸣器和有源蜂鸣器：这里的"源"不是电源，是震荡源
(2)外观和内部结构
无源和有源外观略有差别
查看源图像

(3)无源蜂鸣器发声原理

蜂鸣器发声原理是电流通过电磁线圈，使电磁线圈产生磁场来驱动振动膜发声的，因此需要一定的电流才能驱动它
单片机IO引脚输出的电流较小，单片机输出的TTL电平基本上驱动不了蜂鸣器，因此需要增加一个电流放大的电路。三极管的作用为驱动，通过三极管放大驱动电流，从而可以让蜂鸣器发出声音。
电路图如下，如果要驱动无源蜂鸣器需要在三极管的基极(B)上加载不同频率的信号。对IO口进行电平翻转信号，可以做出“多来米发索拉西”多种音调(初中物理:发生体的震动快慢，男女生音调、暖壶)的效果。

(4)电平翻转控制信号，是高低电平相间的方波

(6)音调如何控制？音阶与频率又有确定的对应关系，因此就可以做出来“do re mi fa sol la si”的效果。音调受震动频率控制，就等于控制信号的频率。频率越高音调越高，听起来越刺耳。所以软件可以控制！频率是通过控制定时时间来决定的！
F = 1/T

(7)声音大小(响度)如何控制？由硬件决定的，没法写代码去控制声音大小。

1.11.1.2、有源蜂鸣器

(1)内置震荡电路后形成有源蜂鸣器，发声原理和无源很像，但是只需要在三极管的基极(B)上给高电平就可以了。通过震荡，内部自动形成方波。
(2)当然有源蜂鸣器也可以用频率信号驱动！可以直接当无源用！
(3)无源蜂鸣器的缺陷
不容易控制，必须控制好频率！而有源蜂鸣器方便程序控制
(4)无源蜂鸣器缺陷
成本较高！

1.11.2.让蜂鸣器响起来

1.11.2.1、接线确定。P0.0接到J8上面。
1.11.2.2、最简单：使用delay让蜂鸣器响起来，关键是计算声音频率(人耳可听的声音频率范围：20-20000Hz)
关键是调整延时函数！调节delay时间感受音调变化

#include<reg51.h>/******************接线*******************J7(buzzer)-P0.0
******************************************/sbit Buzzer = P0^0;//延时函数
//10kHz
void delay100us(void)   //误差 0us
{unsigned char a,b;for(b=1;b>0;b--)for(a=47;a>0;a--);
}
// 20Hz
//void delay50ms(void)   //误差 0us
//{
//    unsigned char a,b;
//    for(b=165;b>0;b--)
//        for(a=150;a>0;a--);
//}void main(void)
{Buzzer = 1;while(1){Buzzer = !Buzzer;delay100us();}
}

1.11.3.用定时器控制蜂鸣器音调

1.11.3.1、上节驱动方法的问题
(1)不容易精准控制时间--每次都得新建一个新的delay(),而且别的单片机，可能不能用单片机小精灵！
(2)CPU控制蜂鸣器中不能做其他事

1.11.3.2、定时器控制蜂鸣器响

任务描述：定时器每隔一段时间响一次(10KHz)，与此同时，静态数码管从0-F循环显示！

(1)计算定时时间：10KHz => 1/10000s = 100us =>高电平+低电平一共100us，那高电平和低电平的时间都是50us。所以要定的时间就是50us
(2)外部晶振12MHz + 12T设置 => 内部时钟频率1MHz => 1us => 计数值为50
(3）初值为65535-50+1=65486=0xFFCE 则TH0 = 0xFF，TL0 = 0xCE；

#include<reg51.h>/******************接线*****************************本程序实现，在静态数码管显示0-F过程中，蜂鸣器在响！			J7(buzzer)-P0.0静态数码管-P1
**************************************************/sbit Buzzer = P0^0;// 独立数码管的段码表
unsigned char val[16] = 
{0xc0, 0xf9, 0xa4, 0xb0, 0x99, 0x92, 0x82, 0xf8, 0x80, 0x90, 0x88, 0x83,0xc6, 0xa1, 0x86, 0x8e
};//延时函数
void delay()
{unsigned char i = 200,j = 100;while(i--)while(j--);
}//定时器中断处理程序
void timer0_buzser() interrupt 1 using 1
{TH0 = 0xFF;TL0 = 0xCE;Buzzer = !Buzzer;}void main(void)
{unsigned char i = 0;TMOD = 0x01;     //使用16位定时器TH0 = 0xFF;				//10KHzTL0 = 0xCE;ET0 = 1;					EA = 1;TR0 = 1;Buzzer = 1;while (1){//主线任务for (i=0; i<16; i++){P1 = val[i];delay();}}
}

1.11.3.3、音调改变:现在想要一个特定频率的音调，怎么办呢？

假设想要得到 F(Hz)的频率,对应的周期为T(s),需要计数次数为n，计数初值为N;
则T = 1/(F*2);
n = T*1000000=500000/F;
N = 65535-n+1;于是N = 65536-500000/F;TH0 = N/256;
TL0 = N%256;

//add
#define F_Hz 	1000                 //要定多少Hz，就写多少
#define N 		(65536-50000/F_Hz)	 //设置初值	//modifyTH0 = N/256;				TL0 = N%256;

1.11.4.蜂鸣器发出滴滴声

首先，大家可能有个疑问，滴滴声，和之前蜂鸣器的声音有什么不同吗？咱们先运行下效果，大家看看差别！

上节课的程序，都是蜂鸣器一直在吱吱的响；滴滴声，就像水滴一样，中间是有停顿的！如何做到？

在t1时间，我们可以定时让蜂鸣器响，在t2时间，我们可以只进行计数count。
程序实现的思路就是

设置一个新的变量count，计数个数和蜂鸣器的频率对应；可以宏定义一个CNT = 1000000/F_Hz
注意，count用char还能存下吗？
要区分是从有声音到没声音，还是从没声音到有声音！所以要有个标志位flag。
调整不同的频率，听效果！

#include<reg51.h>/******************接线*******************滴滴声J7(buzzer)-P0.0静态数码管-P1
******************************************/#define F_Hz 	1000                //要定多少Hz，就写多少
#define N 		(65536-50000/F_Hz)	 //设置初值	
#define CNT 	1000000/F_Hzsbit Buzzer = P0^0;
unsigned int count = CNT;			 //计数次数
unsigned char flag = 0;				 // flag = 0表示有声音，flag = 1表示没声音// 独立数码管的段码表
unsigned char val[16] = 
{0xc0, 0xf9, 0xa4, 0xb0, 0x99, 0x92, 0x82, 0xf8, 0x80, 0x90, 0x88, 0x83,0xc6, 0xa1, 0x86, 0x8e
};/*************延时函数*************/
void delay()
{unsigned char i = 200,j = 100;while(i--)while(j--);
}void timer0_buzser() interrupt 1 using 1
{TH0 = N/256;				TL0 = N%256;if(count-- == 0){//说明开始翻转了if(flag == 0){//从有声音到无声音flag = 1;}else{//从无声音到有声音flag = 0;Buzzer = !Buzzer;}count = CNT;}else{//不翻转时if(flag == 0){Buzzer = !Buzzer;  //响CNT-1次}else{//啥也不做}}}
void main(void)
{unsigned char i = 0;TMOD = 0x01;     //使用16位定时器TH0 = N/256;				TL0 = N%256;ET0 = 1;					EA = 1;TR0 = 1;Buzzer = 1;//设置响和不响的周期时间count = CNT;flag = 0;while (1){//主线任务for (i=0; i<16; i++){P1 = val[i];delay();}}
}

还可以改，有声音和没声音的长度不一样！只要在蜂鸣器响和只计数这里改一下！比如我们设置，有声音时间是无声音的5倍！

这个地方是什么呢？没错就是PWM，有关PWM的介绍，可以看我的一篇文章！
单片机PWM输出原理与实践

1.11.5.让蜂鸣器唱歌1

1.11.5.1、为什么蜂鸣器可以唱歌
(1)发声音调可变(频率)
(2)发声长度可变(节拍)

1.11.5.2、体验写好的唱歌程序

/************************************************************************  
[文件名]  C51音乐程序(八月桂花)  
[功能]    通过单片机演奏音乐  /**********************************************************************/   
#include <REG51.H>    
//#include <INTRINS.H>    
//本例采用89C52, 晶振为11.0592MHZ    
//关于如何编制音乐代码, 其实十分简单,各位可以看以下代码.    
//频率常数即音乐术语中的音调,而节拍常数即音乐术语中的多少拍;    
//所以拿出谱子, 试探编吧!    sbit Beep =  P0^0 ; 			// 要根据实际的接线来修改unsigned char n = 0;  //n为节拍常数变量    
unsigned char code music_tab[] = 
{   0x18, 0x30, 0x1C , 0x10, //格式为: 频率常数, 节拍常数, 频率常数, 节拍常数,    0x20, 0x40, 0x1C , 0x10,   0x18, 0x10, 0x20 , 0x10,   0x1C, 0x10, 0x18 , 0x40,   0x1C, 0x20, 0x20 , 0x20,   0x1C, 0x20, 0x18 , 0x20,   0x20, 0x80, 0xFF , 0x20,   0x30, 0x1C, 0x10 , 0x18,   0x20, 0x15, 0x20 , 0x1C,   0x20, 0x20, 0x20 , 0x26,   0x40, 0x20, 0x20 , 0x2B,   0x20, 0x26, 0x20 , 0x20,   0x20, 0x30, 0x80 , 0xFF,   0x20, 0x20, 0x1C , 0x10,   0x18, 0x10, 0x20 , 0x20,   0x26, 0x20, 0x2B , 0x20,   0x30, 0x20, 0x2B , 0x40,   0x20, 0x20, 0x1C , 0x10,   0x18, 0x10, 0x20 , 0x20,   0x26, 0x20, 0x2B , 0x20,   0x30, 0x20, 0x2B , 0x40,   0x20, 0x30, 0x1C , 0x10,   0x18, 0x20, 0x15 , 0x20,   0x1C, 0x20, 0x20 , 0x20,   0x26, 0x40, 0x20 , 0x20,   0x2B, 0x20, 0x26 , 0x20,   0x20, 0x20, 0x30 , 0x80,   0x20, 0x30, 0x1C , 0x10,   0x20, 0x10, 0x1C , 0x10,   0x20, 0x20, 0x26 , 0x20,   0x2B, 0x20, 0x30 , 0x20,   0x2B, 0x40, 0x20 , 0x15,   0x1F, 0x05, 0x20 , 0x10,   0x1C, 0x10, 0x20 , 0x20,   0x26, 0x20, 0x2B , 0x20,   0x30, 0x20, 0x2B , 0x40,   0x20, 0x30, 0x1C , 0x10,   0x18, 0x20, 0x15 , 0x20,   0x1C, 0x20, 0x20 , 0x20,   0x26, 0x40, 0x20 , 0x20,   0x2B, 0x20, 0x26 , 0x20,   0x20, 0x20, 0x30 , 0x30,   0x20, 0x30, 0x1C , 0x10,   0x18, 0x40, 0x1C , 0x20,   0x20, 0x20, 0x26 , 0x40,   0x13, 0x60, 0x18 , 0x20,   0x15, 0x40, 0x13 , 0x40,   0x18, 0x80, 0x00   
};   // T0定时控制的是音乐的节拍（某一个音节持续的时间）而不管音调（频率）// 音调是直接使用delay做出来的。
void int0()  interrupt 1   //采用中断0 控制节拍    
{  TH0 = 0xd8;   TL0 = 0xef;   n--;   
}   void delay (unsigned char m)   //控制频率延时    
{   unsigned i = 3 * m;   while (--i);   
}   void delayms(unsigned char a)  //豪秒延时子程序    
{   while (--a);                  //采用while(--a) 不要采用while(a--); 各位可编译一下看看汇编结果就知道了!    
}   void main()   
{ unsigned char p, m;   // m为频率常数变量    unsigned char i = 0;   TMOD &= 0x0f;   TMOD |= 0x01;  		// timer0 工作在模式1，16位定时器下 TH0 = 0xd8;TL0 = 0xef;   		// 这个TH和TL的值合起来定了1个10ms左右的一个时间IE = 0x82;   
play:   while (1)   {   
a: 		p = music_tab[i];   if (p == 0x00)   		// 一遍播放完了，延时1s后自动开始下一遍    { i=0, delayms(1000); goto play;}     //如果碰到结束符,延时1秒,回到开始再来一遍    else if (p == 0xff)  { i = i + 1;delayms(100), TR0 = 0; goto a;}  //若碰到休止符,延时100ms,继续取下一音符    else         {m = music_tab[i++], n = music_tab[i++];}  // m取频率常数 和 n取节拍常数    TR0 = 1;                              //开定时器1    while (n != 0){ Beep = ~Beep;delay(m);        	//等待节拍完成, 通过P1口输出音频(可多声道哦!)    }TR0 = 0;                         	//关定时器1    }   
}

(1)复制代码过去(八月桂花)
(2)修改控制蜂鸣器的IO引脚定义

1.11.5.3、乐理知识入门(不想学的直接下课好了hhhh)转自：（arduino）详解蜂鸣器演奏音乐并配有LED闪烁实验
从上面代码我们可以看出，如果我们能够控制好频率(定时)和节拍(延时)，那就有可能演奏出动听的音乐。因此，我们首先需要搞清楚各音调的频率，具体见下表：

我们知道了音调的频率后，下一步就是控制音符的演奏时间。每个音符都会播放一定的时间，这样才能构成一首优美的曲子，而不是生硬的一个调的把所有的音符一股脑的都播放出来。
音符节奏分为一拍、半拍、1/4拍、1/8拍，我们规定一拍音符的时间为1；半拍为0.5；1/4拍为0.25；1/8拍为0.125……，所以我们可以为每个音符赋予这样的拍子播放出来，音乐就成了。

以欢乐颂为例：怎么看还可以参考这个怎么看乐谱简谱

/***********************************************song：《欢乐颂》author： 冯庆巍引脚:P0.0接蜂鸣器**********************************************//*12Mhz晶振工作*/#include <reg51.h>
#define uint unsigned int
#define uchar unsigned char
sbit voice=P0^0;
uchar code sound[]={0xff,0x26,0x40,0x26,0x40,0x24,0x40,0x20,0x40, //33450x20,0x40,0x24,0x40,0x26,0x40,0x2b,0x40, //54320x30,0x40,0x30,0x40,0x2b,0x40,0x26,0x40, //11230x26,0x40,0x26,0x20,0x2b,0x20,0x2b,0x40, 0x2b,0x40,//3.2_2-0x26,0x40,0x26,0x40,0x24,0x40,0x20,0x40, //33450x20,0x40,0x24,0x40,0x26,0x40,0x2b,0x40, //54320x30,0x40,0x30,0x40,0x2b,0x40,0x26,0x40, //11230x2b,0x40,0x2b,0x20,0x30,0x20,0x30,0x40,0x30,0x40,//2.1_1-0xff,0x40,0x2b,0x40,0x2b,0x40,0x26,0x40,0x30,0x40, //22310x2b,0x40,0x26,0x20,0x24,0x20,0x26,0x40,0x30,0x40,//23_4_310x2b,0x40,0x26,0x20,0x24,0x20,0x26,0x40,0x2b,0x40,//23_4_320x30,0x40,0x2b,0x40,0x40,0x40,0x26,0x40,//12.530x26,0x40,0x26,0x40,0x24,0x40,0x20,0x40,//33450x20,0x40,0x24,0x40,0x26,0x40,0x24,0x20,0x2b,0x20,//5434_2_0x30,0x40,0x30,0x40,0x2b,0x40,0x26,0x40,//11230x2b,0x40,0x2b,0x20,0x30,0x20,0x30,0x40,0x30,0x40,//2.1_1-0x00,};
uchar zdjs=0, jp;
del(yj);
void main(void){uint dpjs=0;uchar yj;TMOD=0x01,IE=0x82;TH0=0xd8, TL0=0xef;TR0=1;
while(1){  zdjs=0;dpjs++; yj=sound[dpjs]; dpjs++; jp=sound[dpjs];while(zdjs!=jp){ if(yj!=0xff){if(yj!=0){voice=!voice;del(yj);}else{dpjs=0; break;}}else{voice=0;del(jp);}}}}
time0() interrupt 1  using 1{TH0=0xd8, TL0=0xef;zdjs++;}
del(yj){uchar yj2=2;while(yj!=0){      while(yj2!=0){yj2--;}yj2=2;yj--;  }}
/*                                 冯庆巍编制                    */
/*                            2020年11月19日22时54分43秒                  */

1.11.6.让蜂鸣器唱歌2

工具下载：乐谱编辑工具

1.11.6.1、我和我的祖国
《我和我的祖国》简谱教学

/***********************************************song：《欢乐颂》author： 冯庆巍引脚:P0.0接蜂鸣器**********************************************//*12Mhz晶振工作*/#include <reg51.h>
#define uint unsigned int
#define uchar unsigned char
sbit voice=P0^0;
uchar code sound[]={0xff,0x18,0x40,0x15,0x40,0x13,0x40,0x15,0x40,0x18,0x40,0x1c,0x40,//1+2+3+2+1+6 0x19,0x40,0x1c,0x40,0x26,0x40,0x20,0x40,0x20,0x20,0x20,0x40,0x20,0x20,//7635.5.0x18,0x40,0x15,0x40,0x13,0x40,0x15,0x40,0x18,0x40,0x1c,0x40,//1.2.3.2.1.60x19,0x40,0x20,0x40,0x20,0x20,0x26,0x20,0x1c,0x40,0x1c,0x20,0x1c,0x40,0x1c,0x20,//75.36.6.0x20,0x40,0x24,0x40,0x26,0x40,0x2b,0x40,0x2b,0x40,0x2b,0x40,//5432.0x33,0x40,0x39,0x40,0x40,0x40,0x26,0x40,0x26,0x40,0x26,0x40,//7-6-5-3.0x24,0x40,0x26,0x20,0x2b,0x40,0x30,0x20,//43_21_0x30,0x40,0x26,0x40,0x26,0x40,0x40,0x40,0x26,0x40,0x26,0x40,//1335-330x30,0x40,0x26,0x40,0x26,0x40,0x40,0x40,0x26,0x40,0x26,0x40,//1335-33	0x20,0x40,0x1c,0x40,0x20,0x40,0x24,0x40,0x26,0x40,0x2b,0x40,//565432   0x30,0x40,0x30,0x20,0x40,0x40,0x40,0x20,//1115-5-5-0x30,0x40,0x26,0x40,0x18,0x40,0x19,0x40,0x1c,0x40,0x26,0x40,//131+7630x20,0x40,0x20,0x20,0x20,0x40,0x20,0x20,//5555550x1c,0x40,0x19,0x40,0x1c,0x40,0x20,0x40,0x24,0x40,0x26,0x40,//6765430x2b,0x40,0x2b,0x40,0x2b,0x40,0x39,0x40,0x39,0x40,0x39,0x40,//222.6.6.60x33,0x40,0x39,0x40,0x40,0x40,0x20,0x40,0x30,0x40,0x2b,0x40,//.7.6.55120x26,0x40,0x26,0x40,0x26,0x40,0x26,0x40,0x26,0x40,0x26,0x40,//3333330x20,0x40,0x1c,0x40,0x20,0x40,0x24,0x40,0x26,0x40,0x2b,0x40,//5654320x30,0x40,0x30,0x40,0x30,0x40,0x40,0x40,0x40,0x40,0x40,0x40,//111.5.5.50x30,0x40,0x26,0x40,0x18,0x40,0x19,0x40,0x15,0x40,0x15,0x20,0x18,0x20,//131.72.-1._0x1c,0x40,0x1c,0x40,0x1c,0x40,0x1c,0x40,0x1c,0x40,0x1c,0x40,//6666660x18,0x40,0x19,0x40,0x1c,0x40,0x20,0x40,0x20,0x40,0x20,0x40,//.1765550x1c,0x40,0x20,0x40,0x24,0x40,0x26,0x40,0x26,0x40,0x26,0x40,//6543330x33,0x40,0x33,0x40,0x39,0x40,0x40,0x40,0x40,0x40,0x55,0x40,//.7.6_.52_0x30,0x40,0x30,0x40,0x30,0x40,0x30,0x40,0x30,0x40,0x30,0x40,//1111110x18,0x40,0x15,0x40,0x13,0x40,0x15,0x40,0x18,0x40,0x1c,0x40,//1+2+3+2+1+6 0x19,0x40,0x1c,0x40,0x26,0x40,0x20,0x40,0x20,0x20,0x20,0x40,0x20,0x20,//7635.5.0x18,0x40,0x15,0x40,0x13,0x40,0x15,0x40,0x18,0x40,0x1c,0x40,//1.2.3.2.1.60x19,0x40,0x20,0x40,0x20,0x20,0x26,0x20,0x1c,0x40,0x1c,0x20,0x1c,0x40,0x1c,0x20,//75.36.6.0x20,0x40,0x24,0x40,0x26,0x40,0x2b,0x40,0x2b,0x40,0x2b,0x40,//5432.0x33,0x40,0x39,0x40,0x40,0x40,0x26,0x40,0x26,0x40,0x26,0x40,//7-6-5-3.0x24,0x40,0x24,0x40,0x24,0x40,0x2b,0x40,0x2b,0x40,0x30,0x40,//4-21_0x30,0x40,0x30,0x40,0x30,0x40,0x30,0x40,0x30,0x40,0xff,0x40,//1.10_0x00,};
uchar zdjs=0, jp;
del(yj);
void main(void){uint dpjs=0;uchar yj;TMOD=0x01,IE=0x82;TH0=0xd8, TL0=0xef;TR0=1;
while(1){  zdjs=0;dpjs++; yj=sound[dpjs]; dpjs++; jp=sound[dpjs];while(zdjs!=jp){ if(yj!=0xff){if(yj!=0){voice=!voice;del(yj);}else{dpjs=0; break;}}else{voice=0;del(jp);}}}}
time0() interrupt 1  using 1{TH0=0xd8, TL0=0xef;zdjs++;}
del(yj){uchar yj2=2;while(yj!=0){      while(yj2!=0){yj2--;}yj2=2;yj--;  }}
/*                                 冯庆巍编制                    */
/*                            2020年11月19日22时54分43秒                  */

1.11.6.2、天空之城(部分)

/***********************************************song：《天空之城-久石让》author： 冯庆巍引脚:P0.0接蜂鸣器**********************************************//*12Mhz晶振工作*/#include <reg51.h>
#define uint unsigned int
#define uchar unsigned char
sbit voice=P0^0;
uchar code sound[]={0xff,0xff,0x40,0xff,0x40,0xff,0x40,0x1c,0x20,0x19,0x20, //0006_7_0x18,0x40,0x18,0x20,0x19,0x20,0x18,0x40,0x13,0x40,//.1-7_.1.30x19,0x40,0x19,0x40,0x19,0x40,0x26,0x40,//77730x1c,0x40,0x1c,0x20,0x20,0x20,0x1c,0x40,0x18,0x40,//6-5_6.10x20,0x40,0x20,0x40,0x20,0x40,0x26,0x20,0x26,0x20,//5553_3_0x24,0x40,0x24,0x20,0x26,0x20,0x24,0x20,0x18,0x40,0x18,0x20,//4-3_4_.1-0x26,0x40,0x26,0x40,0xff,0x20,0x18,0x20,0x18,0x20,0x18,0x20,//330_.1_.1_.1_0x19,0x40,0x19,0x20,0x20,0x20,0x20,0x40,0x19,0x40,//7-5_570x19,0x40,0x19,0x40,0x19,0x40,0x1c,0x20,0x19,0x20,//7776_7_0x18,0x40,0x18,0x20,0x19,0x20,0x18,0x40,0x13,0x40,//.1-7_.1.30x19,0x40,0x19,0x40,0x19,0x40,0x26,0x40,//77730x1c,0x40,0x1c,0x20,0x20,0x20,0x1c,0x40,0x18,0x40,//6.5_6.10x20,0x40,0x20,0x40,0x20,0x40,0x26,0x20,0x26,0x20,//5553_3_0x24,0x40,0x18,0x20,0x19,0x40,0x19,0x20,0x18,0x40,//4.1_7-.10x15,0x40,0x13,0x20,0x18,0x20,0x18,0x40,0x18,0x40,//.2.3_.1_.1.10x18,0x20,0x19,0x20,0x1c,0x40,0x19,0x40,0x1c,0x40,//.1_7_6760x1c,0x40,0x1c,0x40,0x1c,0x40,0x18,0x20,0x15,0x20,//666.1_.2_0x13,0x40,0x13,0x20,0x15,0x20,0x13,0x40,0x10,0x40,//.3-.2_.3.50x00,  //0000};
uchar zdjs=0, jp;
del(yj);
void main(void){uint dpjs=0;uchar yj;TMOD=0x01,IE=0x82;TH0=0xd8, TL0=0xef;TR0=1;
while(1){  zdjs=0;dpjs++; yj=sound[dpjs]; dpjs++; jp=sound[dpjs];while(zdjs!=jp){ if(yj!=0xff){if(yj!=0){voice=!voice;del(yj);}else{dpjs=0; break;}}else{voice=0;del(jp);}}}}
time0() interrupt 1  using 1{TH0=0xd8, TL0=0xef;zdjs++;}
del(yj){uchar yj2=2;while(yj!=0){      while(yj2!=0){yj2--;}yj2=2;yj--;  }}
/*                                 冯庆巍编制                    */
/*                            2020年11月20日20时03分43秒                  */

1.11.6.3、黑人抬棺

/***********************************************song：《黑人抬棺BGM》author： 冯庆巍引脚:P0.0接蜂鸣器**********************************************//*12Mhz晶振工作*/#include <reg51.h>
#define uint unsigned int
#define uchar unsigned char
sbit voice=P0^0;
uchar code sound[]={0xff,0x24,0x20,0x24,0x20,0x24,0x20,0x24,0x20,       //44440x1c,0x20,0x1c,0x20,0x1c,0x20,0x1c,0x20,       //66660x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,       //55550x18,0x20,0x18,0x20,0x18,0x20,0x18,0x20,       //1.1.1.1.0x15,0x20,0x15,0x20,0x15,0x20,0x15,0x20,       //2.2.2.2.0x15,0x20,0x15,0x20,0x15,0x20,0x15,0x20,       //2.2.2.2.0x20,0x20,0x24,0x20,0x26,0x20,0x30,0x20,       //54310x2b,0x20,0xff,0x20,0x2b,0x20,0x1c,0x20,       //20260x20,0x20,0xff,0x20,0x24,0x20,0xff,0x20,       //50400x26,0x20,0xff,0x20,0x26,0x20,0x26,0x20,       //30330x20,0x20,0xff,0x20,0x24,0x20,0x26,0x20,       //50430x2b,0x20,0xff,0x20,0x2b,0x20,0x12,0x20,       //2024.0x13,0x20,0x12,0x20,0x13,0x20,0x12,0x20,       //3.4.3.4.0x2b,0x20,0xff,0x20,0x2b,0x20,0x12,0x20,       //2024.0x13,0x20,0x12,0x20,0x13,0x20,0x12,0x20,       //3.4.3.4.0x2b,0x20,0xff,0x20,0x2b,0x20,0x1c,0x20,       //20260x20,0x20,0xff,0x20,0x24,0x20,0xff,0x20,       //50400x26,0x20,0xff,0x20,0x26,0x20,0x26,0x20,       //30330x20,0x20,0xff,0x20,0x24,0x20,0x26,0x20,       //50430x2b,0x20,0xff,0x20,0x2b,0x20,0x12,0x20,       //2024.0x13,0x20,0x12,0x20,0x13,0x20,0x12,0x20,       //3.4.3.4.0x2b,0x20,0xff,0x20,0x2b,0x20,0x12,0x20,       //2024.0x13,0x20,0x12,0x20,0x13,0x20,0x12,0x20,       //3.4.3.4.0x48,0x20,0x48,0x20,0x48,0x20,0x48,0x20,       //44440x1c,0x20,0x1c,0x20,0x1c,0x20,0x1c,0x20,       //66660x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,       //55550x18,0x20,0x18,0x20,0x18,0x20,0x18,0x20,       //1.1.1.1.0x15,0x20,0x15,0x20,0x15,0x20,0x15,0x20,       //2.2.2.2.0x15,0x20,0x15,0x20,0x15,0x20,0x15,0x20,       //2.2.2.2.0x20,0x20,0x24,0x20,0x26,0x20,0x30,0x20,       //54310x2b,0x20,0xff,0x20,0x2b,0x20,0x1c,0x20,       //20260x20,0x20,0xff,0x20,0x24,0x20,0xff,0x20,       //50400x26,0x20,0xff,0x20,0x26,0x20,0x26,0x20,       //30330x20,0x20,0xff,0x20,0x24,0x20,0x26,0x20,       //50430x2b,0x20,0xff,0x20,0x2b,0x20,0x12,0x20,       //2024.0x13,0x20,0x12,0x20,0x13,0x20,0x12,0x20,       //3.4.3.4.0x2b,0x20,0xff,0x20,0x2b,0x20,0x12,0x20,       //2024.0x13,0x20,0x12,0x20,0x13,0x20,0x12,0x20,       //3.4.3.4.0x2b,0x20,0xff,0x20,0x2b,0x20,0x1c,0x20,       //20260x20,0x20,0xff,0x20,0x24,0x20,0xff,0x20,       //50400x26,0x20,0xff,0x20,0x26,0x20,0x26,0x20,       //30330x20,0x20,0xff,0x20,0x24,0x20,0x26,0x20,       //50430x2b,0x20,0xff,0x20,0x2b,0x20,0x12,0x20,       //2024.0x13,0x20,0x12,0x20,0x13,0x20,0x12,0x20,       //3.4.3.4.0x2b,0x20,0xff,0x20,0x2b,0x20,0x12,0x20,       //2024.0x13,0x20,0x12,0x20,0x13,0x20,0x12,0x20,       //3.4.3.4.0x2b,0x20,0xff,0x20,0x2b,0x20,0x1c,0x20,       //20260x20,0x20,0xff,0x20,0x24,0x20,0xff,0x20,     	 //50400x26,0x20,0xff,0x20,0x26,0x20,0x26,0x20,       //30330x20,0x20,0xff,0x20,0x24,0x20,0x26,0x20,       //50430x2b,0x20,0xff,0x20,0x2b,0x20,0x12,0x20,       //2024.0x13,0x20,0x12,0x20,0x13,0x20,0x12,0x20,       //3.4.3.4.0x2b,0x20,0xff,0x20,0x2b,0x20,0x12,0x20,       //2024.0x13,0x20,0x12,0x20,0x13,0x20,0x12,0x20,       //3.4.3.4.0xff,0x20,0xff,0x20,0xff,0x20,0xff,0x20,0x00,  //0000};
uchar zdjs=0, jp;
del(yj);
void main(void){uint dpjs=0;uchar yj;TMOD=0x01,IE=0x82;TH0=0xd8, TL0=0xef;TR0=1;
while(1){  zdjs=0;dpjs++; yj=sound[dpjs]; dpjs++; jp=sound[dpjs];while(zdjs!=jp){ if(yj!=0xff){if(yj!=0){voice=!voice;del(yj);}else{dpjs=0; break;}}else{voice=0;del(jp);}}}}
time0() interrupt 1  using 1{TH0=0xd8, TL0=0xef;zdjs++;}
del(yj){uchar yj2=2;while(yj!=0){      while(yj2!=0){yj2--;}yj2=2;yj--;  }}
/*                                 冯庆巍编制                    */
/*                            2020年11月19日22时54分43秒                  */

本节课结束！