蜂鸣器播放提示音

main.c

#include <REGX52.H>
#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 <REGX52.H>
#include <INTRINS.H>//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 <REGX52.H>
#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 <REGX52.H>
#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 <REGX52.H>
#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,//1P,	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,//2M6,	4+2,M5,	2,M6, 4,H1,	4,M5,	4+4+4,M3,	4,M4,	4+2,M3,	2,M4,	4,H1,	4,//3M3,	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,//4H1,	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,//5M5,	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,//6H1,	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,//7H2,	4+4+4,M5,	2,M5,	2,H1,	4+2,M7,	2,H1,	4,H3,	4,H3,	4+4+4+4,//8M6,	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,//9H3,	4+4+4,H3,	4,H6,	4+4,H5,	4,H5,	4,H3,	2,H2,	2,H1,	4+4,P,	2,H1,	2,//10H2,	4,H1,	2,H2,	2,H2,	4,H5,	4,H3,	4+4+4,H3,	4,H6,	4+4,H5,	4+4,//11H3,	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 <REGX52.H>/*** @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