4-C51-蜂鸣器_蜂鸣器发出不同声音的程序

概要

蜂鸣器使用

技术解释

蜂鸣器发声的频率

各个音调的频率

知道了以上上面的知识后,我们还需要知道一个公式T=1/f(f为频率),蜂鸣器是靠高低电信号,方波开发出声音的.

以下是涉及到的原理图;

技术细节

以下是高低电平持续时间各为1ms,一个周期是2ms,由公式T=1/f(f为频率)=2ms=1000/f,所以f为500HZ

#include <REGX52.H>
#include "DelayXms.H"
sbit BUZZER = P2^5;

void main(){
   
	
	while(1)
	{
   
		BUZZER = ~BUZZER;
		DelayXms(1);
	}

}
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以下是实现两种频率声音

#include <REGX52.H>
#include "DelayXms.H"
sbit BUZZER = P2^5;

void main(){
   
	unsigned int i;
	while(1)
	{
   
		for(i=0;i<100;i++)
		{
   
			BUZZER = ~BUZZER;
		  DelayXms(1);
		}
		for(i=0;i<100;i++)
		{
   
			BUZZER = ~BUZZER;
		  DelayXms(3);
		}
		
	}

}
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以下是音乐盒仅个人参考(详细有需要私信我)

#ifndef __SOUNDPLAY_H_REVISION_FIRST__
#define __SOUNDPLAY_H_REVISION_FIRST__

#include <REGX51.H>

//**************************************************************************

#define SYSTEM_OSC 		11059200//12000000	//??????12000000HZ
#define SOUND_SPACE 	4/5 		//?????????????,//?4?????
sbit    BeepIO    =   	P2^5;		//??????

unsigned int  code FreTab[12]  = {
    262,277,294,311,330,349,369,392,415,440,466,494 }; //?????
unsigned char code SignTab[7]  = {
    0,2,4,5,7,9,11 }; 								  //1~7????????
unsigned char code LengthTab[7]= {
    1,2,4,8,16,32,64 };						
unsigned char Sound_Temp_TH0,Sound_Temp_TL0;	//????????? 
unsigned char Sound_Temp_TH1,Sound_Temp_TL1;	//?????????
//**************************************************************************
unsigned char code Music_Girl[]={
    0x17,0x02, 0x17,0x03, 0x18,0x03, 0x19,0x02, 0x15,0x03,
                                  0x16,0x03, 0x17,0x03, 0x17,0x03, 0x17,0x03, 0x18,0x03,
                                  0x19,0x02, 0x16,0x03, 0x17,0x03, 0x18,0x02, 0x18,0x03,
                                  0x17,0x03, 0x15,0x02, 0x18,0x03, 0x17,0x03, 0x18,0x02,
                                  0x10,0x03, 0x15,0x03, 0x16,0x02, 0x15,0x03, 0x16,0x03,
                                  0x17,0x02, 0x17,0x03, 0x18,0x03, 0x19,0x02, 0x1A,0x03,
                                  0x1B,0x03, 0x1F,0x03, 0x1F,0x03, 0x17,0x03, 0x18,0x03,
                                  0x19,0x02, 0x16,0x03, 0x17,0x03, 0x18,0x03, 0x17,0x03,
                                  0x18,0x03, 0x1F,0x03, 0x1F,0x02, 0x16,0x03, 0x17,0x03,
                                  0x18,0x03, 0x17,0x03, 0x18,0x03, 0x20,0x03, 0x20,0x02,
                                  0x1F,0x03, 0x1B,0x03, 0x1F,0x66, 0x20,0x03, 0x21,0x03,
                                  0x20,0x03, 0x1F,0x03, 0x1B,0x03, 0x1F,0x66, 0x1F,0x03,
                                  0x1B,0x03, 0x19,0x03, 0x19,0x03, 0x15,0x03, 0x1A,0x66
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