?? music play.c
字號:
/*****************************************************************************
關于播放效果
1.由于輸出的是方波，比較難聽:-)
只能說是非常難聽:-)為什么呢？只因為輸出的是方波,包含了大量的奇次諧波。
你可以用雙龍的"虛擬儀器"分別產生正弦波、三角波和方波聽一下，正弦波感覺就比
較純正，
而方波則要多難聽有多難聽！
解決方案：
1.用3、4個IO及R－2R電阻網絡作3、4BitDAC
2.用PWM輸出
3.用專用音樂旋律發生芯片
4.用硬波表的聲卡或MIDI芯片
各方案比較：
1.制作簡單，占用IO、定時器資源較少，成本低,可行性好
2.制作簡單，但PWM頻率不能作高，行不通
3.4.可作出很好聽的效果，但成本較高
關于：如果單片機進作此工作還可以，加入其他的程序肯定不行
2.由于依靠T1的頻繁中斷產生相應頻率的輸出，
因此任何其他同級或更高級別的中斷發生都會使T1不能進入中斷，
使樂曲打頓，這樣就必須使其他中斷占用的時間盡量短才會感覺不出來
關于：功能齊全
底層的東西作出來后，而且是用C編程，要功能齊全是件相當容易的事
關于：音符編碼
優化的音符編碼是這個程序最大的優點(相對于所有見過的類似功能程序)
3.優化音符編碼：一個字節中包含節拍、音符、升降調，可區分數據和命令，
對于一般的樂曲調用功能碼的時候相當少，基本可做到一個音符對應一個字
節，
這點對于小存儲量的單片機來說是必要的。
同時人工將音符譯為機器碼非常容易。(格式看下面實例)
//音符碼格式:| D7 |D6 D5 D4| D3 |D2 D1 D0|
|變調| 節拍|升降| 音符 |
// 示例:0xcb=11001011B,即升調,4/16拍,3Mi低音
//功能碼格式:| D7 D6 D5 D4 | D3 D2 D1 D0|
// |高4位=0時是功能碼|根據低4位散轉 |
0x00, //最后字節為功能碼必須==0x00退出
關于發布此貼的原因
1.幫助初學者，
2.拋磚引玉，
3.論壇正有人問相關的問題
4.就程序的規范性、寫法、注釋等征求大家的意見
還將有一系列的源程序公開，正在整理
關于樂理方面的知識
建議大家到[url herf=http://homemidi.myetang.com]MIDI小屋[/url]去看看，
有大量的MIDI、MIDI知識、MIDI軟件
其中有一個YAMAHA的軟波表一定要試一下，
你會對MIDI的觀念大大改觀(害的我當年發了瘋的從網上找了6萬多首MIDI:-）
上網想找東西的別忘了用搜索:-)
****************************************************************************/
//--------------------------------------------------------------------------//
// 源程序大公開 //
//
// V1.00 //
//
//說 明: //
// 單片機用T1中斷在IO口P1.0輸出樂曲(在P1.0口與VCC間接一喇叭即可聽到) //
// 1.由于輸出的是方波，比較難聽:-)你也可以將波形細分用DA輸出正弦波 //
// 2.由于T1頻繁中斷，任何其他中斷發生都會是樂曲打頓，只適合試驗 //
// 3.優化音符編碼：一個字節中包含節拍、音符、升降調，可區分數據和命令//
// 同時人工將音符譯為機器碼非常容易。(格式看下面實例)//
//--------------------------------------------------------------------------//
＃i nclude <reg52.h>
＃i nclude <intrins.h>
#define FREQ 11059200
// 音樂_編碼2 -- 存儲器定義 //
unsigned char code music_tab1[]={ //音符碼格式:| D7 |D6 D5 D4| D3 |D2
D1 D0|
//梁祝 |變調| 節拍|升降| 音
符 |
0xcb, //示例:0xcb=11001011B,即升調,4/16拍,3Mi低
音
0x35,0x16,0xb9,0x12,0x96,0x99,0xa5,
0xbd,0x99,0x96,0x15,0x13,0x15,0x62,
0x32,0x13,0xa7,0x26,0x25,0x16,0xa9,0x22,
0xa3,0xa9,0x96,0x15,0x16,0x99,0xe5,
0xbb,0x15,0xa7,0xaa,0x96,0x99,0xd5,
0x13,0x15,0x23,0x15,0x16,0x17,0x9a,0xd6,0x15,0x16,
0xb9,0x12,0x25,0x23,0x23,0x22,0x13,0x12,0x21,0x96,0x15,
0x43,0xc9,0x96,0x99,0x96,0x15,0x13,0x15,0x16,0x99,
0xd5, //功能碼格式:| D7 D6 D5 D4 | D3 D2
D1 D0|
// |高4位=0時是功能碼|根據低4位
散轉 |
0x00, //最后字節為功能碼必須==0x00退出
};
unsigned char code music_tab2[]={ //康定情歌
0x23,0x25,0x26,0x16,0x15, 0x36,0x13,0x42,
0x23,0x25,0x26,0x16,0x15, 0x26,0x53,
0x23,0x25,0x26,0x16,0x15, 0x26,0x23,0x42,
0x25,0x23,0x12,0x13,0x12,0x11, 0x22,0xd6,
0x26,0xda, 0x25,0x53, 0x12,0x11,0xd6,
0xad,0x23,0x12,0x13,0x12,0x11, 0x22,0xd6,
0x00,
};
unsigned char code music_tab3[]={ //美酒加咖啡
0x55,0x23,0x25,0x26,0xa9,0x22, 0x73,
0x45,0x25,0x26,0x23,0x22,0x21,0x23, 0x72,
0x52,0x23,0x45,0x43, 0x22,0x21,0xa6,0x25,0x66,
0xc9,0xa6,0x25,0x23,0x25,0x26,0xa9, 0xf5,
0x45,0x23,0x25,0x46,0xc9, 0x22,0x13,0x12,0x21,0x22,0x63,
0x22,0x23,0x25,0x26,0x25,0x23,0x22,0x21, 0x72,
0x52,0x23,0x45,0x43, 0x22,0x21,0xa6,0x25,0x66,
0xb9,0x12,0x23,0x25,0x22,0xa5,0xab,0x22, 0x71,
0x00,
};
unsigned char code music_tab4[]={ //北國之春
0x15,0x16,0x75, 0x15,0x16,0x55,0x13,0x15,0x16,0x15,0x16,0x99,0x12,0x13,
0x65,0x45,0x13,0x12,0x11,0x12, 0x73,
0x62,0x42,0x12,0x11,0x96,0x15, 0x76,
0x55,0x23,0x45,0xa9,0x22, 0x53,0x12,0x13,0x65,
0x52,0x22,0x42,0x21,0xa6, 0xe9,0x91,0x12,0x13,0x12,0x13,0x15,0x99,0x12,
//以上為過門
0x20,0x23,0x23,0x23,0x63, 0x22,0x23,0x23,0x22,0x41,0xa6,0x25,
0x53,0x22,0x21,0xa9,0x21,0xa6, 0x75,
0x26,0xa9,0x21,0xa6,0xc9,0x12,0x11,0x96,0x15,
0x23,0x25,0x25,0x26,0x45,0x21,0x22,
0x13,0x35,0x25,0xa9,0xa6,0x25,0x23,0x22, 0x71,
0x52,0x25,0x45,0x13,0x15,0x13,0x12, 0x21,0x41,0x22,0x43,0x45,
0x23,0x25,0x26,0xa9,0x42,0x12,0x33, 0x72,
0x51,0x22,0x43,0x22,0x21, 0xc6,0xc9,0x29,0xc6,0x45,0x23,0x23,
0x53,0x25,0x26,0x25,0x13,0x12,0x21, 0x62,0x42,0x23,0x25,
0x55,0x26,0x25,0x23,0x45, 0x26,0xa9,0x21,0x22,0x63,
0x52,0x22,0x22,0x13,0x12,0x21,0xa6,0xf9,
0x00,
};
unsigned char code music_l_tab[8]={0,1,2,3,4,6,8,16};//節拍延時單位
unsigned char code music_freq_tab[64]={ //音符定時器值表
0xff,0xea, //0 休止符
255-FREQ/24/131/256, //256-FREQ/24/x/256 //1 do 高字節
256-FREQ/24/131%256, //256-FREQ/24/x%256 //1 do 低字節
255-FREQ/24/147/256,256-FREQ/24/147%256, //2 re
255-FREQ/24/165/256,256-FREQ/24/165%256, //3 mi
255-FREQ/24/175/256,256-FREQ/24/175%256, //4 fa
255-FREQ/24/196/256,256-FREQ/24/196%256, //5 suo
255-FREQ/24/221/256,256-FREQ/24/221%256, //6 la
255-FREQ/24/248/256,256-FREQ/24/248%256, //7 xi
0xff,0xea, //0 休止符
255-FREQ/24/262/256,256-FREQ/24/262%256, //1 do
255-FREQ/24/294/256,256-FREQ/24/294%256, //2 re
255-FREQ/24/330/256,256-FREQ/24/330%256, //3 mi
255-FREQ/24/350/256,256-FREQ/24/350%256, //4 fa
255-FREQ/24/393/256,256-FREQ/24/393%256, //5 suo
255-FREQ/24/441/256,256-FREQ/24/441%256, //6 la
255-FREQ/24/495/256,256-FREQ/24/495%256, //7 xi
0xff,0xea, //0 休止符
255-FREQ/24/525/256,256-FREQ/24/525%256, //1 do
255-FREQ/24/589/256,256-FREQ/24/589%256, //2 re
255-FREQ/24/661/256,256-FREQ/24/661%256, //3 mi
255-FREQ/24/700/256,256-FREQ/24/700%256, //4 fa
255-FREQ/24/786/256,256-FREQ/24/786%256, //5 suo
255-FREQ/24/882/256,256-FREQ/24/882%256, //6 la
255-FREQ/24/990/256,256-FREQ/24/990%256, //7 xi
0xff,0xea, //0 休止符
255-FREQ/24/1049/256,256-FREQ/24/1049%256, //1 do
255-FREQ/24/1178/256,256-FREQ/24/1178%256, //2 re
255-FREQ/24/1322/256,256-FREQ/24/1322%256, //3 mi
255-FREQ/24/1400/256,256-FREQ/24/1400%256, //4 fa
255-FREQ/24/1572/256,256-FREQ/24/1572%256, //5 suo
255-FREQ/24/1665/256,256-FREQ/24/1665%256, //6 la
255-FREQ/24/1869/256,256-FREQ/24/1869%256, //7 xi
};
unsigned char code music_frequp_tab[64]={ //升半音
0xff,0xea, //0 休止符
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