music.c

我以前课设编的电子琴程序

 #include <AT89X52.H>
#include <intrins.h>
#define  FREQ 11059200
unsigned int code table[4][4]={64021,64103,64260,64400,64524,64580,64684,64777, 
                           64820,64898,64968,65030,65058,65110, 65157,65178};  //T0的初值，即对应不同的音调
#define uchar unsigned char
uchar light[4][4]={0x0,0x1,0x3,0x7,0xf,0x1f,0x3f,0x7f,0x3f,0x1f,0xf,0x7,0x3,0x1,0x0,0xff};//不同的键，控制不同的灯亮
uchar temp[2]={0};       //前两位为矩阵的行号和列号
uchar exchang[]={0x7f,0xbf,0xdf,0xef,0xf7,0xfb,0xfd,0xfe};  //扫描P2口
uchar a,b,c,d,HTH1,LTL1;  
unsigned char keycount=0;
unsigned int Cnt;
unsigned char key=0;

/*******************歌曲模式*****************************/
//  音乐_编码2 -- 存储器定义  //
unsigned char code music_tab1[]={    //音符码格式:| D7 |D6  D5  D4| D3 |D2  D1  D0|
                                     //梁祝       |变调|      节拍|升降|     音符 |
    0xcb,                            //示例:0xcb=11001011B,即升调,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,                            //功能码格式:| D7  D6  D5  D4  | D3  D2  D1  D0|
                                     //           |高4位=0时是功能码|根据低4位散转  |
    0x00,                            //最后字节为功能码必须==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[]={    //北国之春
    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,
    //以上为过门
    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};//节拍延时单位
unsigned char code music_freq_tab[64]={             //音符定时器值表
    0xff,0xea,                                      //0 休止符
    255-FREQ/24/131/256,     //256-FREQ/24/x/256    //1 do 高字节
    256-FREQ/24/131%256,     //256-FREQ/24/x%256    //1 do 低字节
    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
    255-FREQ/24/139/256,        //1 do 高字节 //255-FREQ/24/x/256
    256-FREQ/24/139%256,        //1 do 低字节 //256-FREQ/24/x%256
    255-FREQ/24/156/256,256-FREQ/24/156%256,        //2 re
    255-FREQ/24/175/256,256-FREQ/24/175%256,        //3 mi
    255-FREQ/24/185/256,256-FREQ/24/185%256,        //4 fa
    255-FREQ/24/208/256,256-FREQ/24/208%256,        //5 suo
    255-FREQ/24/234/256,256-FREQ/24/234%256,        //6 la
    255-FREQ/24/262/256,256-FREQ/24/262%256,        //7 xi
    0xff,0xea,                                      //0 休止符
    255-FREQ/24/278/256,256-FREQ/24/278%256,        //1 do
    255-FREQ/24/312/256,256-FREQ/24/312%256,        //2 re
    255-FREQ/24/350/256,256-FREQ/24/350%256,        //3 mi
    255-FREQ/24/371/256,256-FREQ/24/371%256,        //4 fa
    255-FREQ/24/416/256,256-FREQ/24/416%256,        //5 suo
    255-FREQ/24/467/256,256-FREQ/24/467%256,        //6 la
    255-FREQ/24/525/256,256-FREQ/24/525%256,        //7 xi
    0xff,0xea,                                      //0 休止符
    255-FREQ/24/556/256,256-FREQ/24/556%256,        //1 do
    255-FREQ/24/624/256,256-FREQ/24/624%256,        //2 re
    255-FREQ/24/700/256,256-FREQ/24/700%256,        //3 mi
    255-FREQ/24/742/256,256-FREQ/24/742%256,        //4 fa
    255-FREQ/24/833/256,256-FREQ/24/833%256,        //5 suo
    255-FREQ/24/935/256,256-FREQ/24/935%256,        //6 la
    255-FREQ/24/1049/256,256-FREQ/24/1049%256,      //7 xi
    0xff,0xea,                                      //0 休止符
    255-FREQ/24/1112/256,256-FREQ/24/1112%256,      //1 do
    255-FREQ/24/1248/256,256-FREQ/24/1248%256,      //2 re
    255-FREQ/24/1400/256,256-FREQ/24/1400%256,      //3 mi
    255-FREQ/24/1484/256,256-FREQ/24/1484%256,      //4 fa
    255-FREQ/24/1618/256,256-FREQ/24/1618%256,      //5 suo
    255-FREQ/24/1764/256,256-FREQ/24/1764%256,      //6 la
    255-FREQ/24/1968/256,256-FREQ/24/1968%256,      //7 xi
};
unsigned char temp_TH0;
unsigned char temp_TL0;
//  音乐_编码2 -- IO定义  //
sbit PIN_MSC=P1^0;                   //  音乐输出端口  //
//  音乐_编码2 -- 函数原型//
void music_delay(unsigned char x);   //音乐节拍延时
void music_play(unsigned char *msc); //播放音乐子程序
//  音乐_编码2 -- 函数    //
//---------------------------------------------------------------------------//
void music_int_t0 (void) interrupt 1 using 1    //定时中断1//
    {
    PIN_MSC=~PIN_MSC;
    TH0=temp_TH0;
    TL0=temp_TL0;
}
//---------------------------------------------------------------------------//
void music_delay(unsigned char n)     //延时 125*n 毫秒
    {
    unsigned char i=125,j;
    do {
        do {
            for (j=0; j<230; j++) _nop_(); //j=(11159KHz/12-10)/4
        }while(--i);
    }while(--n);
}
//---------------------------------------------------------------------------//
void music_play(unsigned char *msc)   //音乐
    {
    unsigned char music_freq=32;      //音高 
    unsigned char music_long;         //节拍
    unsigned char music_data=0;       //音符数据
    bit music_up=0;                   //升半音
    bit music_break=0;                //断奏
    temp_TH0=0xff;
    temp_TL0=0xea;                    //关输出(输出超声波)
    TMOD=0x11;                        //T0：16位定时器、T1：16位定时器
//  ET0=0;                            //关T0定时器中断
    ET0=1;                            //开T1定时器中断
	TR0=1;             /****/
//---------------------------------------------------------
    while (*msc != 0x00)
        {
        music_data=*msc & 0x07;
        music_long=*msc>>4;
        //---------------------------------------------------------
        if (music_long != 0)          //是音符
            {
            if (*msc >=128)           //需升降调
                {
                if (((*msc) & 0x08) == 0)
                    {if (music_freq >= 16) music_freq -= 16;}    //音高下降 
                else
                    {if (music_freq <  48) music_freq += 16;}    //音高上升
             }
            //---------------------------------------------------------
            if (music_up==1)          //升半音
                {
                temp_TH0=music_frequp_tab[(music_freq  + (music_data <<1))];
                temp_TL0=music_frequp_tab[(music_freq + (music_data <<1)+1)];
            }
            else                      //不升半音
                {
                temp_TH0=music_freq_tab[(music_freq + (music_data <<1))];
                temp_TL0=music_freq_tab[(music_freq + (music_data <<1)+ 1)];
            }
            //---------------------------------------------------------
            if (music_break)          //断奏
                {
                music_delay(music_l_tab[music_long&0x07]-1);
                temp_TH0=0xff;
                temp_TL0=0xea;
                music_delay(1);
            }
            else                      //连奏
                music_delay(music_l_tab[music_long&0x07]);
        }
        //---------------------------------------------------------
        else                          //是功能码
            {
            switch(music_data)
                {
                case 0x04:
                    music_up=0;       //不升半音
                    break;
                case 0x05:
                    music_up=1;       //升半音
                    break;
                case 0x06:
                    music_break=0;    //断奏
                    break;
                case 0x07:
                    music_break=1;    //连奏
                    break;
                default:
                    break;
            }
        }
        //---------------------------------------------------------