大家好！最近對(duì)51單片機(jī)播放音樂(lè)比較感興趣，但中間遇到一些問(wèn)題特來(lái)請(qǐng)教！1.這一首生日歌的歌譜是用簡(jiǎn)譜寫(xiě)的，那么搜索什么可以找到其他的譜子；2.譜子中的1.2.3……是怎么區(qū)分高8位，還是低8位的？3.曲子的頻率的計(jì)算公式是如何？或者說(shuō)怎么用這個(gè)代碼移植到其他曲子？#include <reg51.h>
sbit speaker=P1^5;
unsigned char timer0h,timer0l,time;
//生日歌
code unsigned char sszymmh[]={5,1,1, 5,1,1, 6,1,2, 5,1,2, 1,2,2, 7,1,4,
5,1,1, 5,1,1, 6,1,2, 5,1,2, 2,2,2, 1,2,4,
5,1,1, 5,1,1, 5,2,2, 3,2,2, 1,2,2, 7,1,2, 6,1,2,
4,2,1, 4,2,1, 3,2,2, 1,2,2, 2,2,2, 1,2,4};
// 音階頻率表 高八位
code unsigned char FREQH[]={
0xF2,0xF3,0xF5,0xF5,0xF6,0xF7,0xF8,
0xF9,0xF9,0xFA,0xFA,0xFB,0xFB,0xFC,0xFC, //1,2,3,4,5,6,7,8,i
0xFC,0xFD,0xFD,0xFD,0xFD,0xFE,
0xFE,0xFE,0xFE,0xFE,0xFE,0xFE,0xFF,
} ;
// 音階頻率表 低八位
code unsigned char FREQL[]={
0x42,0xC1,0x17,0xB6,0xD0,0xD1,0xB6,
0x21,0xE1,0x8C,0xD8,0x68,0xE9,0x5B,0x8F, //1,2,3,4,5,6,7,8,i
0xEE,0x44, 0x6B,0xB4,0xF4,0x2D,
0x47,0x77,0xA2,0xB6,0xDA,0xFA,0x16,
};
void delay(unsigned char t)
{
unsigned char t1;
unsigned long t2;
for(t1=0;t1<t;t1++)
{
for(t2=0;t2<8000;t2++)
{
;
}
}
TR0=0;
}
void t0int() interrupt 1
{
TR0=0;
speaker=!speaker;
TH0=timer0h;
TL0=timer0l;
TR0=1;
}
void song()
{
TH0=timer0h;
TL0=timer0l;
TR0=1;
delay(time);
}
void main(void)
{
unsigned char k,i;
TMOD=1; //置CT0定時(shí)工作方式1
EA=1;
ET0=1;//IE=0x82 //CPU開(kāi)中斷,CT0開(kāi)中斷
while(1)
{
i=0;
while(i<75){ //音樂(lè)數(shù)組長(zhǎng)度 ，唱完從頭再來(lái)
k=sszymmh[i]+7*sszymmh[i+1]-1;
timer0h=FREQH[k];
timer0l=FREQL[k];
time=sszymmh[i+2];
i=i+3;
song();
}
}
} |
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