25、蜂鸣器播放提示音&音乐

蜂鸣器播放提示音

main.c

#include 
#include "Delay.h"
#include "Key.h"
#include "Nixie.h"
#include "Buzzer.h"

unsigned char KeyNum;

void main()
{
	Nixie(1,0);
	while(1)
	{
		KeyNum=Key();
		if(KeyNum)
		{
			Buzzer_Time(100);
			Nixie(1,KeyNum);
		}
	}
}

Buzzer.c

#include 
#include 

//蜂鸣器端口：
sbit Buzzer=P2^5;

/**
  * @brief  蜂鸣器私有延时函数，延时500us
  * @param  无
  * @retval 无
  */
void Buzzer_Delay500us()		//@12.000MHz
{
	unsigned char i;

	_nop_();
	i = 247;
	while (--i);
}

/**
  * @brief  蜂鸣器发声
  * @param  ms 发声的时长，范围：0~32767
  * @retval 无
  */
void Buzzer_Time(unsigned int ms)
{
	unsigned int i;
	for(i=0;i<ms*2;i++)
	{
		Buzzer=!Buzzer;
		Buzzer_Delay500us();
	}
}

Buzzer.h

#ifndef __BUZZER_H__
#define __BUZZER_H__

void Buzzer_Time(unsigned int ms);

#endif

Nixie.c

#include 
#include "Delay.h"

//数码管段码表
unsigned char NixieTable[]={0x3F,0x06,0x5B,0x4F,0x66,0x6D,0x7D,0x07,0x7F,0x6F};

/**
  * @brief  数码管显示
  * @param  Location 要显示的位置，范围：1~8
  * @param  Number 要显示的数字，范围：段码表索引范围
  * @retval 无
  */
void Nixie(unsigned char Location,Number)
{
	switch(Location)		//位码输出
	{
		case 1:P2_4=1;P2_3=1;P2_2=1;break;
		case 2:P2_4=1;P2_3=1;P2_2=0;break;
		case 3:P2_4=1;P2_3=0;P2_2=1;break;
		case 4:P2_4=1;P2_3=0;P2_2=0;break;
		case 5:P2_4=0;P2_3=1;P2_2=1;break;
		case 6:P2_4=0;P2_3=1;P2_2=0;break;
		case 7:P2_4=0;P2_3=0;P2_2=1;break;
		case 8:P2_4=0;P2_3=0;P2_2=0;break;
	}
	P0=NixieTable[Number];	//段码输出
//	Delay(1);				//显示一段时间
//	P0=0x00;				//段码清0，消影
}

Nixie.h

#ifndef __NIXIE_H__
#define __NIXIE_H__

void Nixie(unsigned char Location,Number);

#endif

Key.c

#include 
#include "Delay.h"

/**
  * @brief  获取独立按键键码
  * @param  无
  * @retval 按下按键的键码，范围：0~4，无按键按下时返回值为0
  */
unsigned char Key()
{
	unsigned char KeyNumber=0;
	
	if(P3_1==0){Delay(20);while(P3_1==0);Delay(20);KeyNumber=1;}
	if(P3_0==0){Delay(20);while(P3_0==0);Delay(20);KeyNumber=2;}
	if(P3_2==0){Delay(20);while(P3_2==0);Delay(20);KeyNumber=3;}
	if(P3_3==0){Delay(20);while(P3_3==0);Delay(20);KeyNumber=4;}
	
	return KeyNumber;
}

Key.h

#ifndef __KEY_H__
#define __KEY_H__

unsigned char Key();

#endif

蜂鸣器播放音乐

main.c

#include 
#include "Delay.h"
#include "Timer0.h"

//蜂鸣器端口定义
sbit Buzzer=P2^5;

//播放速度，值为四分音符的时长(ms)
#define SPEED	500

//音符与索引对应表，P：休止符，L：低音，M：中音，H：高音，下划线：升半音符号#
#define P	0
#define L1	1
#define L1_	2
#define L2	3
#define L2_	4
#define L3	5
#define L4	6
#define L4_	7
#define L5	8
#define L5_	9
#define L6	10
#define L6_	11
#define L7	12
#define M1	13
#define M1_	14
#define M2	15
#define M2_	16
#define M3	17
#define M4	18
#define M4_	19
#define M5	20
#define M5_	21
#define M6	22
#define M6_	23
#define M7	24
#define H1	25
#define H1_	26
#define H2	27
#define H2_	28
#define H3	29
#define H4	30
#define H4_	31
#define H5	32
#define H5_	33
#define H6	34
#define H6_	35
#define H7	36

//索引与频率对照表
unsigned int FreqTable[]={
	0,
	63628,63731,63835,63928,64021,64103,64185,64260,64331,64400,64463,64528,
	64580,64633,64684,64732,64777,64820,64860,64898,64934,64968,65000,65030,
	65058,65085,65110,65134,65157,65178,65198,65217,65235,65252,65268,65283,
};

//乐谱
unsigned char code Music[]={
	//音符,时值,
	
	//1
	P,	4,
	P,	4,
	P,	4,
	M6,	2,
	M7,	2,
	
	H1,	4+2,
	M7,	2,
	H1,	4,
	H3,	4,
	
	M7,	4+4+4,
	M3,	2,
	M3,	2,
	
	//2
	M6,	4+2,
	M5,	2,
	M6, 4,
	H1,	4,
	
	M5,	4+4+4,
	M3,	4,
	
	M4,	4+2,
	M3,	2,
	M4,	4,
	H1,	4,
	
	//3
	M3,	4+4,
	P,	2,
	H1,	2,
	H1,	2,
	H1,	2,
	
	M7,	4+2,
	M4_,2,
	M4_,4,
	M7,	4,
	
	M7,	8,
	P,	4,
	M6,	2,
	M7,	2,
	
	//4
	H1,	4+2,
	M7,	2,
	H1,	4,
	H3,	4,
	
	M7,	4+4+4,
	M3,	2,
	M3,	2,
	
	M6,	4+2,
	M5,	2,
	M6, 4,
	H1,	4,
	
	//5
	M5,	4+4+4,
	M2,	2,
	M3,	2,
	
	M4,	4,
	H1,	2,
	M7,	2+2,
	H1,	2+4,
	
	H2,	2,
	H2,	2,
	H3,	2,
	H1,	2+4+4,
	
	//6
	H1,	2,
	M7,	2,
	M6,	2,
	M6,	2,
	M7,	4,
	M5_,4,
	
	
	M6,	4+4+4,
	H1,	2,
	H2,	2,
	
	H3,	4+2,
	H2,	2,
	H3,	4,
	H5,	4,
	
	//7
	H2,	4+4+4,
	M5,	2,
	M5,	2,
	
	H1,	4+2,
	M7,	2,
	H1,	4,
	H3,	4,
	
	H3,	4+4+4+4,
	
	//8
	M6,	2,
	M7,	2,
	H1,	4,
	M7,	4,
	H2,	2,
	H2,	2,
	
	H1,	4+2,
	M5,	2+4+4,
	
	H4,	4,
	H3,	4,
	H3,	4,
	H1,	4,
	
	//9
	H3,	4+4+4,
	H3,	4,
	
	H6,	4+4,
	H5,	4,
	H5,	4,
	
	H3,	2,
	H2,	2,
	H1,	4+4,
	P,	2,
	H1,	2,
	
	//10
	H2,	4,
	H1,	2,
	H2,	2,
	H2,	4,
	H5,	4,
	
	H3,	4+4+4,
	H3,	4,
	
	H6,	4+4,
	H5,	4+4,
	
	//11
	H3,	2,
	H2,	2,
	H1,	4+4,
	P,	2,
	H1,	2,
	
	H2,	4,
	H1,	2,
	H2,	2+4,
	M7,	4,
	
	M6,	4+4+4,
	P,	4,
	
	0xFF	//终止标志
};

unsigned char FreqSelect,MusicSelect;

void main()
{
	Timer0Init();
	while(1)
	{
		if(Music[MusicSelect]!=0xFF)	//如果不是停止标志位
		{
			FreqSelect=Music[MusicSelect];	//选择音符对应的频率
			MusicSelect++;
			Delay(SPEED/4*Music[MusicSelect]);	//选择音符对应的时值
			MusicSelect++;
			TR0=0;
			Delay(5);	//音符间短暂停顿
			TR0=1;
		}
		else	//如果是停止标志位
		{
			TR0=0;
			while(1);
		}
	}
}

void Timer0_Routine() interrupt 1
{
	if(FreqTable[FreqSelect])	//如果不是休止符
	{
		/*取对应频率值的重装载值到定时器*/
		TL0 = FreqTable[FreqSelect]%256;		//设置定时初值
		TH0 = FreqTable[FreqSelect]/256;		//设置定时初值
		Buzzer=!Buzzer;	//翻转蜂鸣器IO口
	}
}

Timer0.c

#include 

/**
  * @brief  定时器0初始化，1毫秒@12.000MHz
  * @param  无
  * @retval 无
  */
void Timer0Init(void)
{
	TMOD &= 0xF0;		//设置定时器模式
	TMOD |= 0x01;		//设置定时器模式
	TL0 = 0x18;		//设置定时初值
	TH0 = 0xFC;		//设置定时初值
	TF0 = 0;		//清除TF0标志
	TR0 = 1;		//定时器0开始计时
	ET0=1;
	EA=1;
	PT0=0;
}

/*定时器中断函数模板
void Timer0_Routine() interrupt 1
{
	static unsigned int T0Count;
	TL0 = 0x18;		//设置定时初值
	TH0 = 0xFC;		//设置定时初值
	T0Count++;
	if(T0Count>=1000)
	{
		T0Count=0;
		
	}
}
*/

Timer0.h

#ifndef __TIMER0_H__
#define __TIMER0_H__

void Timer0Init(void);

#endif