单片机学习路程（四）蜂鸣器唱歌

2023-08-12 20:53| 来源: 网络整理| 查看: 265

今天学习单片机蜂鸣器后，发现蜂鸣器的频率经过控制后可以实现唱歌的功能，就在网上找了相关教程，下面分享给大家。

代码亲测，可直接复制使用。

代码内附语句注释，理解应该不难。

#include #define SYSTEM_OSC 11059200//12000000 //定义晶振频率12000000HZ #define SOUND_SPACE 4/5 //定义普通音符演奏的长度分率,//每4分音符间隔 sbit BeepIO = P2^0; //定义输出管脚 unsigned int code FreTab[12] = { 262,277,294,311,330,349,369,392,415,440,466,494 }; //原始频率表 unsigned char code SignTab[7] = { 0,2,4,5,7,9,11 }; //1~7在频率表中的位置 unsigned char code LengthTab[7]= { 1,2,4,8,16,32,64 }; unsigned char Sound_Temp_TH0,Sound_Temp_TL0; //音符定时器初值暂存 unsigned char Sound_Temp_TH1,Sound_Temp_TL1; //音长定时器初值暂存 //************************************************************************** void InitialSound(void) { BeepIO = 1; Sound_Temp_TH1 = (65535-(1/1200)*SYSTEM_OSC)/256; // 计算TL1应装入的初值 (10ms的初装值) Sound_Temp_TL1 = (65535-(1/1200)*SYSTEM_OSC)%256; // 计算TH1应装入的初值 TH1 = Sound_Temp_TH1; TL1 = Sound_Temp_TL1; TMOD |= 0x11; ET0 = 1; ET1 = 0; TR0 = 0; TR1 = 0; EA = 1; } void BeepTimer0(void) interrupt 1 //音符发生中断 { BeepIO = !BeepIO; TH0 = Sound_Temp_TH0; TL0 = Sound_Temp_TL0; } //************************************************************************** void Play(unsigned char *Sound,unsigned char Signature,unsigned Octachord,unsigned int Speed) { unsigned int NewFreTab[12]; //新的频率表 unsigned char i,j; unsigned int Point,LDiv,LDiv0,LDiv1,LDiv2,LDiv4,CurrentFre,Temp_T,SoundLength; unsigned char Tone,Length,SL,SH,SM,SLen,XG,FD; for(i=0;i 11) { j = j-12; NewFreTab[i] = FreTab[j]*2; } else NewFreTab[i] = FreTab[j]; if(Octachord == 1) NewFreTab[i]>>=2; else if(Octachord == 3) NewFreTab[i]= 2; //低音 if (SM==3) CurrentFre

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