|几分音符: |1 |2 |4 |8 |16 |32 |64 音符=2^n
十位表示音符的演奏效果(0-2): 0-普通，1-连音，2-顿音 百位是符点位: 0-无符点，1-有符点
调用演奏子程序的格式
***************************************************************************/
#ifndef __SOUNDPLAY_H_REVISION_FIRST__ #define __SOUNDPLAY_H_REVISION_FIRST__
//**************************************************************************
#define SYSTEM_OSC #define SOUND_SPACE 每4分音符间隔 sbit BeepIO = sbit key=P3^7; 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
P1^0;
//定义输出管脚
12000000 4/5
//定义晶振频率12000000HZ //定义普通音符演奏的长度分率,//
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;
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
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unsigned char Sound_Temp_TH1,Sound_Temp_TL1; //音长定时器初值暂存 //************************************************************************** void InitialSound(void) {
BeepIO = 0;
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)%6; // 计算
TH1应装入的初值 }
void BeepTimer0(void) interrupt 1 //音符发生中断 { }
//************************************************************************** void {
unsigned int NewFreTab[12]; unsigned char i,j;
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TH1 = Sound_Temp_TH1; TL1 = Sound_Temp_TL1; TMOD |= 0x11; ET0 = 1; ET1 = 0; TR0
= 0;
TR1 = 0; EA = 1;
BeepIO = !BeepIO;
TH0 = Sound_Temp_TH0;
TL0 = Sound_Temp_TL0;
Play(unsigned char *Sound,unsigned char Signature,unsigned
Octachord,unsigned int Speed)
//新的频率表
unsigned
unsigned char Tone,Length,SL,SH,SM,SLen,XG,FD; for(i=0;i<12;i++)
int
Point,LDiv,LDiv0,LDiv1,LDiv2,LDiv4,CurrentFre,Temp_T,SoundLength;
// 根据调号及升降八度来生成新的频
率表
Point = 0;
Tone = Sound[Point]; Length = Sound[Point+1];
LDiv0 = 12000/Speed;
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{ }
SoundLength = 0;
while(Sound[SoundLength] != 0x00) //计算歌曲长度 { }
SoundLength+=2; j = i + Signature; if(j > 11) { } else
NewFreTab[i] = FreTab[j]; j = j-12;
NewFreTab[i] = FreTab[j]*2;
if(Octachord == 1)
NewFreTab[i]>>=2; NewFreTab[i]<<=2;
else if(Octachord == 3)
// 读出第一个音符和它时时值
// 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 = 1;
while(Point < SoundLength) {
SL=Tone;
//计算出音符
//计算出高低音
SM=Tone/10; SH=Tone/100;
//计算出是否升半
//查出对应音符的
CurrentFre = NewFreTab[SignTab[SL-1]+SH];
频率
if(SL!=0) {
if (SM==1) CurrentFre >>= 2; if (SM==3) CurrentFre <<= 2; Temp_T
//低音 //高音
=
65536-(50000/CurrentFre)*10/(12000000/SYSTEM_OSC);//计算计数器初值
}
SLen=LengthTab[Length]; //算出是几分音符 XG=Length/10; FD=Length/100; LDiv=LDiv0/SLen;
//算出连音音符演奏的长度(多少个
//算出音符类型(0普通1连音2顿音)
Sound_Temp_TH0 = Temp_T/256; Sound_Temp_TL0 = Temp_T%6; TH0 = Sound_Temp_TH0;
TL0 = Sound_Temp_TL0 + 12; //加12是对中断延时的补偿
10ms)
if (FD==1)
LDiv=LDiv+LDiv/2; if(XG==0)
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if(XG!=1)
//算出普通音符的演奏长度
if (SLen<=4)
LDiv1=LDiv-LDiv4;
else
LDiv1=LDiv*SOUND_SPACE;
else
LDiv1=LDiv/2;
//算出顿音的演奏长度
else LDiv1=LDiv; if(SL==0) LDiv1=0;
LDiv2=LDiv-LDiv1;
//算出不发音的长度if (SL!=0) { TR0=1;
for(i=LDiv1;i>0;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=0;
for(i=LDiv2;i>0;i--) //音符间的间隔 { while(TF1==0);
TH1 = Sound_Temp_TH1; TL1 = Sound_Temp_TL1; TF1=0;
}
}
Point+=2; Tone=Sound[Point];
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}
}
Length=Sound[Point+1];
BeepIO = 0;
//************************************************************************** #endif
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