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1、用51单片机IO口播放几首音乐（附C程序）以下为51单片机播放音乐简谱的函数库：/*说明*曲谱存贮格式 unsigned char code MusicName音高，音长，音高，音长., 0,0; 末尾:0,0 表示结束(Important)音高由三位数字组成：l 个位是表示 17 这七个音符；l 十位是表示音符所在的音区:1-低音，2-中音，3-高音；l 百位表示这个音符是否要升半音: 0-不升，1-升半音。音长最多由三位数字组成：l 个位表示音符的时值，其对应关系是： |数值(n): |0 |1 |2 |3 | 4 | 5 | 6 |几分音符: |1 |2 |4 |8 |16 |32 |6
2、4 音符=2n ；l 十位表示音符的演奏效果(0-2): 0-普通，1-连音，2-顿音；l 百位是符点位: 0-无符点，1-有符点。调用演奏子程序的格式：Play(乐曲名,调号,升降八度,演奏速度); |乐曲名 : 要播放的乐曲指针,结尾以(0,0)结束; |调号(0-11) : 是指乐曲升多少个半音演奏; |升降八度(1-3) : 1:降八度, 2:不升不降, 3:升八度; |演奏速度(1-12000): 值越大速度越快;*/#ifndef _SOUNDPLAY_H_REVISION_FIRST_#define _SOUNDPLAY_H_REVISION_FIRST_#include /*#
3、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 = P26; /定义输出管脚unsigned int code FreTab12 = 262,277,294,311,330,349,369,392,415,440,466,494 ; /原始频率表unsigned char code SignTab7 = 0,2,4,5,7,9,11 ; /17在频率表中的位置unsigned char code LengthTab7=
4、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
5、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
6、Speed) unsigned int NewFreTab12; /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; NewFreTabi = FreTabj*2; else NewFreTabi = FreTabj; if(Octachord = 1) NewFreTabi=2; else if(
7、Octachord = 3) NewFreTabi=2; SoundLength = 0; while(SoundSoundLength != 0x00) /计算歌曲长度 SoundLength+=2; Point = 0; Tone = SoundPoint; Length = SoundPoint+1; / 读出第一个音符和它时时值 LDiv0 = 12000/Speed; / 算出1分音符的长度(几个10ms) LDiv4 = LDiv0/4; / 算出4分音符的长度 LDiv4 = LDiv4-LDiv4*SOUND_SPACE; / 普通音最长间隔标准 TR0 = 0; TR1 =
8、1; while(Point = 2; /低音 if (SM=3) CurrentFre = 2; /高音 Temp_T = 65536-(50000/CurrentFre)*10/(12000000/SYSTEM_OSC);/计算计数器初值 Sound_Temp_TH0 = Temp_T/256; Sound_Temp_TL0 = Temp_T%256; TH0 = Sound_Temp_TH0; TL0 = Sound_Temp_TL0 + 12; /加12是对中断延时的补偿 SLen=LengthTabLength%10; /算出是几分音符 XG=Length/10%10; /算出音符类
9、型(0普通1连音2顿音) FD=Length/100; LDiv=LDiv0/SLen; /算出连音音符演奏的长度(多少个10ms) if (FD=1) LDiv=LDiv+LDiv/2; if(XG!=1) if(XG=0) /算出普通音符的演奏长度 if (SLen0;i-) /发规定长度的音 while(TF1=0); TH1 = Sound_Temp_TH1; TL1 = Sound_Temp_TL1; TF1=0; if(LDiv2!=0) TR0=0; BeepIO=1; for(i=LDiv2;i0;i-) /音符间的间隔 while(TF1=0); TH1 = Sound_Te
10、mp_TH1; TL1 = Sound_Temp_TL1; TF1=0; Point+=2; Tone=SoundPoint; Length=SoundPoint+1; BeepIO = 1;/*#endif附录：以下为曲谱编码文件，自己可以根据规则，对照简谱编写曲谱编码表。/挥着翅膀的女孩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,
