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#include<reg52.h>
#include<intrins.h>
#define uchar unsigned char
#define uint unsigned int
#define allsong 4 //歌曲總數(shù) 按實(shí)際寫
sbit P1_0 = P1^0;
sbit P1_1 = P1^1;
sbit P1_2 = P1^2;
sbit P1_3 = P1^3;
sbit P1_4 = P1^4;
sbit P1_5 = P1^5;
sbit P1_6 = P1^6;
sbit P1_7 = P1^7;
sbit beep = P3^0;
sbit key_play = P3^1;
uchar x = 0; /*矩陣鍵盤橫坐標(biāo) 從1開始 0為未按下的標(biāo)志 */
uchar y = 0; /*矩陣鍵盤縱坐標(biāo) 從1開始 0為未按下的標(biāo)志 */
uchar flash = 0; //控制led燈顯示 的變量 */
uchar f_l; /*按鍵發(fā)出音調(diào)的初值(低位）*/
uchar f_h; //高位
uchar song_l; /*歌曲音調(diào)的初值（低位）*/
uchar song_h; //高位
uchar out = 0; /*聲音輸出變量 1表示有輸出 0表示無(wú)輸出 */
uchar yindiao; /*音調(diào) 定義為全局變量 為了在播放時(shí)數(shù)碼管能顯示當(dāng)前音調(diào)*/
uchar yindiao_h; //音調(diào)的高四位
uchar yindiao_l; //音調(diào)的低四位
uchar jiepai; /*節(jié)拍（簡(jiǎn)而言之就是一個(gè)音調(diào)響的時(shí)間長(zhǎng)度）*/
uchar song_id = 1; //歌曲序號(hào)變量
uchar temp_id = 1; //歌曲臨時(shí)序號(hào)
uint which = 2; /*簡(jiǎn)譜表里的第幾個(gè)音 從第2個(gè)開始 第0個(gè)用來(lái)存曲速，第1個(gè)占位*/
uchar same = 0; /*在暫停時(shí)選了同一首歌曲，用于跳出暫停循環(huán)*/
uchar key_x(); //獲取鍵盤橫坐標(biāo) 函數(shù)
uchar key_y(); //獲取鍵盤縱坐標(biāo) 函數(shù)
void play(); //播放歌曲 函數(shù)
void delayms(uint ms);//延時(shí)xx ms 函數(shù)
void delay(uint pai);//節(jié)拍延時(shí) 函數(shù)
void key_check(); //檢查按鍵狀態(tài) 函數(shù)
void display(); //數(shù)碼管顯示對(duì)應(yīng)音調(diào) 函數(shù)
void speak(); /*按鍵后 給定時(shí)器0賦對(duì)應(yīng)音調(diào)的初值 從而發(fā)出聲音*/
uchar choose(); /*播放狀態(tài)下 選歌函數(shù) 釋放按鍵后才跳出函數(shù)，返回歌曲序號(hào)*/
uchar choose2(); /*暫停狀態(tài)下 選歌函數(shù) 不用釋放按鍵即可跳出函數(shù)，返回歌曲序號(hào) */
void play(); //播放歌曲 函數(shù)
uchar code num[]={0x00, //數(shù)碼管段選碼
0x77,0x7c,0x39,0x5e,0x79,0x71,0x3d, //a - g
0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07, //1 - 7
0x86,0xdb,0xcf,0xe6,0xed,0xfd,0x87 //1. - 7.
};
uchar code led_table[]={0xff,0x7f,0x3f,0x1f,0x0f,0x07,0x03,0x01,0x00};/*發(fā)光二極管閃爍表*/
uchar code chuzhi[]={ //音調(diào)對(duì)應(yīng)的計(jì)數(shù)初值
0xff,0xff,//占0位
0xf8,0x8c,//低1 (0x01) a -數(shù)碼管顯示方式
0xf9,0x5b,// 2 b
0xfa,0x15,// 3 c
0xfa,0x67,// 4 d
0xfb,0x04,// 5 e
0xfb,0x90,// 6 f
0xfc,0x0c,//低7（0x07）g
0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, /*占位 0x08 - 0x0b (8 - 11)*/
0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, 0xff,0xff,/*占位 0x0c - 0x10 (12 - 16)*/
0xfc,0x44,//中1 （0x11） (17)
0xfc,0xac,// 2
0xfd,0x09,// 3
0xfd,0x34,// 4
0xfd,0x82,// 5
0xfd,0xc8,// 6
0xfe,0x06,//中7 （0x17） (23)
0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, /*占位 0x18 - 0x1b (24 - 27)*/
0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, /*占位 0x1c - 0x20 (28 - 32)*/
0xfe,0x22,//高1 （0x21）1. (33)
0xfe,0x56,// 2 2.
0xfe,0x85,// 3 3.
0xfe,0x9a,// 4 4.
0xfe,0xc1,// 5 5.
0xfe,0xe4,// 6 6.
0xff,0x03 //高7 （0x27）7. (39)
};
uchar code ymt[]={//玉滿堂
0x96,0x00, //曲速 0x96表示 150拍/分
0x00,0x0a,0x05,0x02,0x15,0x02,0x12,0x02,
0x13,0x04,0x13,0x02,0x15,0x02,0x12,0x04,0x12,0x02,0x13,0x02,
0x12,0x10,
0x13,0x04,0x13,0x02,0x12,0x02,0x13,0x04,0x15,0x02,0x16,0x02,
0x15,0x0c,0x13,0x02,0x15,0x02,
0x16,0x04,0x16,0x02,0x21,0x02,0x16,0x04,0x15,0x02,0x13,0x02,
0x15,0x0c,0x15,0x02,0x16,0x02,
0x21,0x04,0x21,0x02,0x22,0x02,0x23,0x04,0x22,0x02,0x21,0x02,
0x22,0x10,
0x23,0x08,0x15,0x02,0x16,0x02,0x21,0x02,0x22,0x02,
0x23,0x04,0x23,0x02,0x22,0x02,0x21,0x06,0x21,0x02,
0x16,0x04,0x16,0x02,0x21,0x02,0x16,0x04,0x13,0x04,
0x15,0x10,
0x16,0x04,0x16,0x02,0x21,0x02,0x16,0x04,0x21,0x02,0x22,0x02,
0x23,0x04,0x23,0x02,0x22,0x02,0x21,0x06,0x21,0x02,
0x16,0x02,0x21,0x02,0x16,0x02,0x21,0x02,0x22,0x02,0x23,0x02,0x25,0x02,0x23,0x02,
0x22,0x0c,0x21,0x02,0x22,0x02,
0x23,0x06,0x15,0x02,0x16,0x02,0x21,0x02,0x22,0x02,
0x23,0x04,0x23,0x02,0x22,0x02,0x21,0x06,0x21,0x02,
0x16,0x04,0x16,0x02,0x21,0x02,0x16,0x02,0x21,0x02,0x15,0x02,0x13,0x02,
0x15,0x0c,0x13,0x02,0x15,0x02,
0x16,0x04,0x16,0x02,0x21,0x02,0x16,0x04,0x16,0x02,0x21,0x02,
0x22,0x04,0x22,0x02,0x23,0x02,0x22,0x04,0x22,0x02,0x23,0x02,
0x25,0x02,0x26,0x02,0x23,0x02,0x25,0x02,0x22,0x02,0x23,0x02,0x21,0x02,0x16,0x02,
0x21,0x10,
0xff
};
uchar code dl[]={ //蝶戀
0x82,0x00, //曲速 0x82表示 130拍/分
0x13,0x04,0x13,0x04,0x13,0x04,0x12,0x04,0x13,0x08,
0x12,0x04,0x13,0x04,0x12,0x04,0x12,0x04,0x06,0x08,
0x06,0x04,0x07,0x04,0x11,0x08,0x12,0x04,0x11,0x04,0x07,0x08,0x06,0x04,0x05,0x04,0x06,0x0f,
0x13,0x04,0x13,0x04,0x13,0x04,0x12,0x04,0x13,0x0c,
0x16,0x04,0x15,0x04,0x16,0x04,0x15,0x04,0x15,0x04,0x12,0x04,
0x12,0x04,0x13,0x04,0x14,0x08,0x15,0x04,0x14,0x04,0x13,0x04,0x12,0x04,0x11,0x04,0x13,0x0f,0x13,0x0c,
0x13,0x04,0x16,0x08,0x17,0x04,0x16,0x04,0x15,0x0c,0x13,0x04,0x15,0x0f,
0x13,0x04,0x15,0x04,0x12,0x08,0x16,0x04,0x15,0x04,0x13,0x08,0x12,0x04,0x12,0x04,0x13,0x0c,
0x12,0x08,0x16,0x04,0x16,0x0c,
0x11,0x08,0x16,0x04,0x16,0x08,
0x16,0x04,0x17,0x04,0x21,0x08,0x17,0x04,0x16,0x04,0x17,0x08,0x16,0x04,0x17,0x04,0x13,0x08,0x13,0x0c,
0x13,0x04,0x16,0x08,0x17,0x08,0x16,0x04,0x15,0x0c,0x13,0x04,0x15,0x0f,
0x14,0x04,0x15,0x04,0x16,0x08,0x17,0x04,0x16,0x04,0x17,0x08,
0x16,0x04,0x17,0x04,0x13,0x0f,0x13,0x0f,
0x12,0x08,0x16,0x04,0x16,0x02,0x16,0x0f,
0x11,0x04,0x16,0x04,0x16,0x02,0x16,0x08,
0x16,0x04,0x17,0x04,0x21,0x08,0x17,0x04,0x16,0x04,0x17,0x08,0x15,0x08,0x16,0x0f,
0x23,0x04,0x22,0x04,0x22,0x04,0x21,0x04,0x21,0x04,0x17,0x04,0x17,0x04,0x16,0x04,
0x21,0x04,0x17,0x04,0x17,0x04,0x16,0x04,0x16,0x04,0x15,0x04,0x15,0x04,0x14,0x04,
0x16,0x04,0x15,0x04,0x15,0x04,0x14,0x04,0x14,0x04,0x13,0x04,0x13,0x04,0x12,0x0,
0x13,0x0f,0x13,0x0f,
0xff
};
uchar code srkl[]={//生日快樂
0x78,0x00, //曲速 120
0x15,0x02,0x15,0x02,
0x16,0x04,0x15,0x04,0x21,0x04,
0x17,0x04,0x00,0x04,0x15,0x02,0x15,0x02,
0x16,0x04,0x15,0x04,0x22,0x04,
0x21,0x08,0x15,0x02,0x15,0x02,
0x25,0x04,0x23,0x04,0x21,0x04,
0x17,0x04,0x16,0x08,
0x16,0x04,0x00,0x04,0x24,0x02,0x24,0x02,
0x23,0x04,0x21,0x04,0x22,0x04,
0x21,0x08,
0x21,0x08,0x00,0x08,
0x15,0x02,0x15,0x02,//第二遍
0x16,0x04,0x15,0x04,0x21,0x04,
0x17,0x04,0x00,0x04,0x15,0x02,0x15,0x02,
0x16,0x04,0x15,0x04,0x22,0x04,
0x21,0x08,0x15,0x02,0x15,0x02,
0x25,0x04,0x23,0x04,0x21,0x04,
0x17,0x04,0x16,0x08,
0x16,0x04,0x00,0x04,0x24,0x02,0x24,0x02,
0x23,0x04,0x21,0x04,0x22,0x04,
0x21,0x08,
0x21,0x08,0x00,0x04,
0xff
};
uchar code test[]={//測(cè)試
0x78,0x00, //曲速 0x78表示 120拍/分
0x21,0x04,0x22,0x04,0x23,0x04,0x24,0x04,0x25,0x04,0x26,0x04,0x27,0x04,0x00,0x04,
0x01,0x01,0x02,0x02,0x03,0x03,0x04,0x04,0x05,0x05,0x06,0x06,0x07,0x07,0x00,0x08,
0x11,0x08,0x12,0x07,0x13,0x06,0x14,0x05,0x15,0x04,0x16,0x03,0x17,0x02,0x00,0x01,
0xff,
};
void delayms(uint ms) /*ms 等于1時(shí)，延時(shí)1ms 等于2時(shí)，延時(shí)2ms，以此類推*/
{
uchar a,b,c; //+3
while(ms--)
{
for(c=1;c>0;c--) // 1+2 = 3
for(b=142;b>0;b--) // 1*( 1+142*2)) = 285
for(a=2;a>0;a--); // 142*(1+2*2) = 710
}
}
void delay(uint pai) /*pai 是節(jié)拍 pai若定義成uchar類型，當(dāng)節(jié)拍>0x0c時(shí)，會(huì)造成數(shù)據(jù)溢出，產(chǎn)生失真。*/
{
uchar a,b,c;
while(pai--) //延遲pai 個(gè) 6.25ms
{
for(c=1;c>0;c--) // 1+2=3
for(b=28;b>0;b--) // 1*(1+28*2) =57
for(a=110;a>0;a--); // 28*(1+110*2) = 6188
}
}
uchar key_x() /*P1口高位接縱坐標(biāo)（P1.7 - P1.4） 低位接橫坐標(biāo)(P1.3 - P1.0)*/
{
uchar i;
P1 = 0x0f; /*有按鍵按下后 對(duì)應(yīng)按鍵的橫坐標(biāo)電位被拉低（ 注意低電位引腳不能被高電位引腳抬高，只能是低電位拉低高電位）*/
if(P1_0 == 0)
{ delayms(5); //延時(shí)5ms 去抖動(dòng)
if(P1_0 == 0)
i = 1;
}
else if(P1_1 == 0)
{ delayms(5);
if(P1_1 == 0)
i = 2;
}
else if(P1_2 == 0)
{ delayms(5);
if(P1_2 == 0)
i = 3;
}
else if(P1_3 == 0)
{ delayms(5);
if(P1_3 == 0)
i = 4;
}
else
i = 0;
return (i); //0表示按鍵未按下
}
uchar key_y()
{
uchar j;
P1 = 0xf0;
if(P1_4 == 0)
{ delayms(5);
if(P1_4 == 0)
j = 1;
}
else if(P1_5 == 0)
{ delayms(5);
if(P1_5 == 0)
j = 2;
}
else if(P1_6 == 0)
{ delayms(5);
if(P1_6 == 0)
j = 3;
}
else if(P1_7 == 0)
{ delayms(5);
if(P1_7 == 0)
j = 4;
}
else
j = 0;
return (j);
}
void key_check() /*檢查矩陣按鍵坐標(biāo)、播放鍵的狀態(tài)及播放鍵狀態(tài)設(shè)置*/
{
x = key_x();
y = key_y();
if(key_play == 0)
key_play = 0; /*保持播放鍵引腳低電平，讓其作為歌曲正在播放的標(biāo)志*/
else
key_play = 1; /*保持播放鍵引腳高電平，讓其作為歌曲未播放的標(biāo)志*/
}
void display() /*數(shù)碼管顯示相應(yīng)的音調(diào)*/
{
if(key_play == 1) //按鍵彈奏時(shí)
{ if(x != 0 && y != 0 )
{
if(x == 1)
P0 = num[3 + y] ; //低音4 - 7
else if(x == 2)
P0 = num[7 + y]; //中音1 - 4
else if(x == 3)
P0 = num[11 + y]; //中音5 - 7 和 高音 1
else if(x == 4)
P0 = num[15 + y]; //高音2 - 5
}
else
P0 = 0x00;
}
else //播放音樂時(shí)
{ if(yindiao_h == 0) /* yindiao變量的高四位表示 低（0） 中（1） 高（2） 音 */
P0 = num[yindiao_l];/*yindiao變量的低四位表示“調(diào)”， 數(shù)碼管顯示當(dāng)前音調(diào)*/
else if(yindiao_h == 1) // 中音
P0 = num[yindiao_l + 7];
else if(yindiao_h == 2) //高音
P0 = num[yindiao_l + 14];
}
}
void speak() /* 按鍵 ，為定時(shí)器0 T0 賦計(jì)數(shù)初值，讓 T0函數(shù)驅(qū)動(dòng)蜂鳴器發(fā)出對(duì)應(yīng)的音調(diào) */
{
if(x == 1)
{
f_h = chuzhi[2*y + 6]; //低音4 - 7
f_l = chuzhi[2*y + 6 + 1];
}
else if(x == 2)
{
f_h = chuzhi[(16+y)*2]; //中音 1 -4
f_l = chuzhi[(16+y)*2 +1];
}
else if(x == 3)
{
if(y <= 3)
{
f_h = chuzhi[(20+y)*2]; //中音 5 - 7
f_l = chuzhi[(20+y)*2 + 1];
}
else
{
f_h = chuzhi[66]; //高音1
f_l = chuzhi[67];
}
}
else if(x == 4)
{
f_h = chuzhi[(33+y)*2]; //高音2 -5
f_l = chuzhi[(33+y)*2 + 1];
}
}
void timer0() interrupt 1 //定時(shí)器0
{
if(key_play == 0)
{
TL0 = song_l;
TH0 = song_h;
beep = ~beep;
}
else
if(x != 0 && y != 0 && key_play == 1)/*當(dāng)有矩陣按鍵按下，并且不播放歌曲時(shí) */
{
TL0 = f_l; //賦初值
TH0 = f_h; //
beep = ~beep; /*蜂鳴器引腳電平取反，定時(shí)器每溢出一次電平取反一次，不同的計(jì)數(shù)初值對(duì)應(yīng)不同的溢出時(shí)間，對(duì)應(yīng)不同的方波頻率 */
}
}
void timer1() interrupt 3 //定時(shí)器1 led燈起落
{
TL1 = 0x00;
TH1 = 0x39;/*定時(shí)器1 高8位初值。控制led燈的起落快慢(數(shù)值不嚴(yán)格)*/
if(key_play == 1) //不播放歌曲時(shí)
{
if(x != 0 && y != 0 && flash < 8 ) //最大加到8
++flash;
else if(x == 0 && y == 0 && flash >0 ) //最小減到0
--flash;
P2 = led_table[flash];
}
else if(key_play == 0 ) //播放歌曲時(shí)
{
if(out == 1 && flash < 8 && flash < jiepai) /*out ==1 表示有歌曲發(fā)聲時(shí),(flash<jiepai)使 led燈剛好指示節(jié)拍*/
++flash;
else if(out == 0 && flash > 0)
--flash;
P2 = led_table[flash];
}
}
uchar choose() //播放狀態(tài)下 選歌
{
uchar i = 0; //第i首歌 初值0表示未選歌
uchar j;
x = key_x();
y = key_y();
if(x == 1 && y == 1)
i = 1; //選第一首
else if(x == 1 && y == 2)
i = 2; //選第二首
else if(x == 1 && y == 3)
i = 3;
else if(x == 1 && y == 4)
i = 4;
else if(x == 2 && y == 1)
i = 5;
else if(x == 4 && y == 1)// 上一首
i = 13;
else if(x == 4 && y == 2)//用作暫停播放
i = 14;
else if(x == 4 && y == 3) //下一首
i = 15;
else if(x == 4 && y == 4)
i = 16; //用作停止播放
if(i == song_id)
{
which = 2; //選同一首歌時(shí)，重播這首歌
}
else if(i > allsong && i < 13) /*如果按鍵號(hào) 在 最大歌曲序號(hào) 和 功能鍵 之間，返回原歌曲序號(hào)*/
i = song_id; //
else if(i == 0) //i等于初值 說(shuō)明未按鍵
i = song_id; //不按鍵選歌時(shí)，返回原歌曲的序號(hào)
while(1) //釋放按鍵時(shí)才進(jìn)行下一步
{
x = key_x();
y = key_y();
if(x == 1)
j = y;
else if(x == 2)
j = 4 + y;
else if(x == 3)
j = 8 + y;
else if(x == 4)
j = 12 + y;
if(x == 0 || (j > allsong && j < 13)) /*釋放按鍵 或者按鍵號(hào) 在 最大歌曲序號(hào) 和 功能鍵 之間時(shí) 跳出循環(huán)*/
break;
}
return(i);
}
uchar choose2() /*選歌 不用放開按鍵 在暫停的狀態(tài)下使用 */
{
uchar i = 0;
x = key_x();
y = key_y();
if(x == 1 && y == 1) //選第一首
i = 1;
else if(x == 1 && y == 2) //選第二首
i = 2;
else if(x == 1 && y == 3)
i = 3;
else if(x == 1 && y == 4)
i = 4;
else if(x == 2 && y == 1)
i = 5;
else if(x == 4 && y == 1) // 上一首
i = 13;
else if(x == 4 && y == 2) //用作暫停播放
i = 14;
else if(x == 4 && y == 3) //下一首
i = 15;
else if(x == 4 && y == 4)
i = 16; //用作停止播放
if(i == song_id)
{
same = 1;
which = 2; /*選了同一首歌時(shí)，重播這首歌 (0，1用來(lái)存曲速了 故從2開始) */
}
else if(i > allsong && i < 13) /*如果按鍵號(hào) 在 最大歌曲序號(hào) 和 功能鍵 之間，返回原歌曲序號(hào)*/
i = song_id;
else if(i == 0) //i等于初值 說(shuō)明未按鍵
i = song_id; /*不按鍵選歌時(shí)，返回原歌曲的序號(hào)*/
return(i);
}
void play() //播放歌曲
{
uint qusu;//歌曲播放速度 （拍/分）
uint pai2; /* pai2 = (2400/qusu)*jiepai; 送到delay（）函數(shù)*/
while(1)
{
while(1)
{
choose_id:
temp_id = choose(); //選歌
/****************************↓↓↓↓↓暫停↓↓↓↓↓*****************************************/
if(temp_id == 14) //如果按下暫停鍵
{
delayms(500); //延時(shí)500ms
while(1)
{
temp_id = choose2();/*choose2 按下就起作用 不必等到放開按鍵才起作用*/
if(temp_id == 14) /*再次按下“暫停鍵” 表示繼續(xù)播放*/
{
break;
}
else if(temp_id == 16)/*按下停止鍵 ，功能表現(xiàn)為：暫停播放時(shí)也能停止播放，回到播放前狀態(tài)*/
{
song_id = 16;
break;
}
else if(temp_id == 13) //上一首
{
which = 2;
if(song_id == 1)
song_id = allsong ;//播放最后一首
else
--song_id;
break;
}
else if(temp_id == 15) //下一首
{
which = 2;
if(song_id == allsong)
song_id = 1; //播放第一首
else
++song_id;
break;
}
else if(temp_id != song_id && temp_id <= allsong)/*選了另一首歌曲 屏蔽掉了未定義的按鍵 */
{
which = 2; /*從歌曲的第一個(gè)音播放 (0，1用來(lái)存曲速了 故從2開始) */
song_id = temp_id;
break;
}
else if(same == 1)
break;
}
same = 0; //跳出循環(huán)后 需重置為0
}
/****************************↑↑↑↑↑暫停↑↑↑↑↑***************************************/
else if(temp_id == 13) //上一首
{
which = 2;
if(song_id == 1)
song_id = allsong ;//播放最后一首
else
--song_id;
}
else if(temp_id == 15) //下一首
{
which = 2;
if(song_id == allsong)
song_id = 1; //播放第一首
else
++song_id;
}
else if(temp_id == 16)
{
song_id = 16;
}
else if(temp_id != song_id && temp_id <= allsong) //選了另一首歌曲
{
which = 2; //從歌曲的第一個(gè)音播放
song_id = temp_id;
}
/**************************************************************************************/
nochoose: //不用選歌 當(dāng)正常放完一首歌時(shí)，跳到這里
if(song_id == 4)
{ key_play = 0;
if(srkl[which] == 0xff) /* 遇到結(jié)束符 跳出循環(huán)（內(nèi)循環(huán)） 停止播放 */
break;
qusu = srkl[0];
yindiao = srkl[which]; //音調(diào)
jiepai = srkl[which+1]; //節(jié)拍
}
else
if(song_id == 3)
{ key_play = 0;
if(ymt[which] == 0xff) /* 遇到結(jié)束符 跳出循環(huán)（內(nèi)循環(huán)） 停止播放 */
break;
qusu = ymt[0];
yindiao = ymt[which]; //音調(diào)
jiepai = ymt[which+1]; //節(jié)拍
}
else
if(song_id == 2)
{ key_play = 0;
if(dl[which] == 0xff) /* 遇到結(jié)束符 跳出循環(huán) 停止播放 */
break;
qusu = dl[0];
yindiao = dl[which]; //
jiepai = dl[which+1]; //
}
else if(song_id == 1)
{
key_play = 0;
if(test[which] == 0xff) /* 遇到結(jié)束符 跳出循環(huán) 停止播放*/
break;
qusu = test[0];
yindiao = test[which];
jiepai = test[which+1];
}
/******************************************************************************/
else if(song_id == 16 )
{
which = 2;
break;
}
else
{
key_play = 1;
goto choose_id; /*如果既沒有選歌 又沒有停止 返回去做選擇*/
}
/********************************************************************************************/
yindiao_l = yindiao % 16; // 低四位 調(diào)
yindiao_h = yindiao /16; /* 高四位 。。是低音0 中音1 還是 高音2 */
if(yindiao != 0) /*音調(diào)不為0。（當(dāng)音調(diào)為0時(shí)表示這個(gè)音不響 但依舊要占這個(gè)音的播放時(shí)間）*/
{
song_h = chuzhi[yindiao*2];
song_l = chuzhi[yindiao*2+1];
TR0 = 1; /*給初值賦值后，開啟定時(shí)器0 蜂鳴器開始發(fā)聲 */
TR1 = 1; /*開啟定時(shí)器1 ,led開始閃動(dòng)*/
display(); //數(shù)碼管顯示音調(diào)
out = 1; /*正在發(fā)聲的標(biāo)志，定時(shí)器1得以控制led燈按一定的時(shí)間間隔 逐個(gè)點(diǎn)亮，表現(xiàn)為 —— 沖 */
}
else
{
TR0 = 0;
out = 0;
TR1 = 0;
P0 = 0x00;
flash = 0;
P2 = led_table[0];
}
pai2 = (2400/qusu)*jiepai;
delay(pai2); /*延時(shí) = 節(jié)拍數(shù) x 125ms (決定著1個(gè)音的發(fā)聲時(shí)間) */
TR0 = 0; //蜂鳴器停止發(fā)聲
P0 = 0x00;
out = 0;
delayms(50); /*唱完一個(gè)音停xx ms（決定每個(gè)音調(diào)之間的時(shí)間間隔 根據(jù)個(gè)人喜好節(jié)奏來(lái)定 */
TR1 = 0; //led停止閃動(dòng)
flash = 0;
P2 = led_table[0];
which = which + 2; //下一個(gè)音
} /*已經(jīng)放完一首歌，或者停止播放 ，接下來(lái)判斷是停止播放還是播放下一首 */
TR0 = 0;
P0 = 0x00;
out = 0;
flash = 0;
P2 = led_table[0];
if(song_id == 16) /*坐標(biāo)(4,4)的鍵盤作為停止播放鍵*/
{
while(1)
{
x = key_x();
if(x == 0)
break;/*松開按鍵 才結(jié)束 避免觸發(fā)其他程序 比如電子琴發(fā)聲、led顯示等 */
}
key_play = 1; /*播放鍵引腳置高電平，播放結(jié)束的標(biāo)志 */
song_id = 1; // 第一首歌開始
which = 2; // 每首歌的最開始的一個(gè)音
break; /*跳出第二個(gè)循環(huán)（即結(jié)束play函數(shù)）*/
}
else if(song_id == allsong)/*當(dāng)放到最后一首時(shí)，從第一首開始 (當(dāng)前共3首) */
{
song_id = 1;
which = 2;
delayms(1000); //一秒后從第一首開始播放
goto nochoose;
}
else
{
++song_id; /*歌曲序號(hào)自動(dòng)+1 自動(dòng)播放下一首歌*/
which = 2;
delayms(1000);
goto nochoose;//不用選歌 播放下一首
}
}
}
void main()
{
P0 = 0x00;
P2 = 0xff;
TMOD = 0x11; /*定時(shí)器0 定時(shí)器1 都采用方式1（16位定時(shí)器方式） */
IE = 0x8a;
PT0 = 1; /*設(shè)置定時(shí)器0為高優(yōu)先級(jí)，避免被定時(shí)器1干擾，造成聲音失真 */
while(1)
{
key_check();
if(key_play == 1 && x != 0 && y != 0)
{
TR1 = 1;
display();
speak();
TR0 = 1;
}
else if(key_play == 0)
{
key_play = 0;
play(); /*play函數(shù)有循環(huán)語(yǔ)句，當(dāng)按下停止鍵（16鍵）時(shí)才能跳出 */
}
else
{
if(flash == 0)/*當(dāng)flash 減到0時(shí) 再關(guān)閉定時(shí)器1，即 讓led燈全部熄滅再關(guān)閉T1 */
TR1 = 0;
TR0 = 0;
P0 = 0x00;
}
}
}
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