行业知识
小白跟做江科大51单片机之蜂鸣器播放音乐
1.引入Delay及Timer0相关文件
（）2.编写main.c代码
#include
（）#include "Delay.h"
#include "Timer0.h"
sbit Buzzer=P2^5;
//音符与索引对应表，P：休止符，L：低音，M：中音，H：高音，下划线：升半音符号#
#define P 0
#define L1 1
#define L1_ 2
#define L2 3
#define L2_ 4
#define L3 5
#define L4 6
#define L4_ 7
#define L5 8
#define L5_ 9
#define L6 10
#define L6_ 11
#define L7 12
#define M1 13
#define M1_ 14
#define M2 15
#define M2_ 16
#define M3 17
#define M4 18
#define M4_ 19
#define M5 20
#define M5_ 21
#define M6 22
#define M6_ 23
#define M7 24
#define H1 25
#define H1_ 26
#define H2 27
#define H2_ 28
#define H3 29
#define H4 30
#define H4_ 31
#define H5 32
#define H5_ 33
#define H6 34
#define H6_ 35
#define H7 36
//此数组是取到全部的音
unsigned int FreqTable[]={
0,
63628,63731,63835,63928,64021,64103,64185,64260,64331,64400,64463,64528,
64580,64633,64684,64732,64777,64820,64860,64898,64934,64968,65000,65030,
65058,65085,65110,65134,65157,65178,65198,65217,65235,65252,65268,65283,
};
//乐谱，必须使用code，RAM最大128字节
unsigned char code Music[]={
//音符,时值,
//1
P, 4,
P, 4,
P, 4,
M6, 2,
M7, 2,
H1, 4+2,
M7, 2,
H1, 4,
H3, 4,
M7, 4+4+4,
M3, 2,
M3, 2,
//2
M6, 4+2,
M5, 2,
M6, 4,
H1, 4,
M5, 4+4+4,
M3, 4,
M4, 4+2,
M3, 2,
M4, 4,
H1, 4,
//3
M3, 4+4,
P, 2,
H1, 2,
H1, 2,
H1, 2,
M7, 4+2,
M4_,2,
M4_,4,
M7, 4,
M7, 8,
P, 4,
M6, 2,
M7, 2,
//4
H1, 4+2,
M7, 2,
H1, 4,
H3, 4,
M7, 4+4+4,
M3, 2,
M3, 2,
M6, 4+2,
M5, 2,
M6, 4,
H1, 4,
//5
M5, 4+4+4,
M2, 2,
M3, 2,
M4, 4,
H1, 2,
M7, 2+2,
H1, 2+4,
H2, 2,
H2, 2,
H3, 2,
H1, 2+4+4,
//6
H1, 2,
M7, 2,
M6, 2,
M6, 2,
M7, 4,
M5_,4,
M6, 4+4+4,
H1, 2,
H2, 2,
H3, 4+2,
H2, 2,
H3, 4,
H5, 4,
//7
H2, 4+4+4,
M5, 2,
M5, 2,
H1, 4+2,
M7, 2,
H1, 4,
H3, 4,
H3, 4+4+4+4,
//8
M6, 2,
M7, 2,
H1, 4,
M7, 4,
H2, 2,
H2, 2,
H1, 4+2,
M5, 2+4+4,
H4, 4,
H3, 4,
H3, 4,
H1, 4,
//9
H3, 4+4+4,
H3, 4,
H6, 4+4,
H5, 4,
H5, 4,
H3, 2,
H2, 2,
H1, 4+4,
P, 2,
H1, 2,
//10
H2, 4,
H1, 2,
H2, 2,
H2, 4,
H5, 4,
H3, 4+4+4,
H3, 4,
H6, 4+4,
H5, 4+4,
//11
H3, 2,
H2, 2,
H1, 4+4,
P, 2,
H1, 2,
H2, 4,
H1, 2,
H2, 2+4,
M7, 4,
M6, 4+4+4,
P, 4,
0xFF //终止标志
};
unsigned char freselect,Musicselect;
void main()
{
Timer0Init();
while(1)
{
if(Music[Musicselect]!=0xFF)
{
freselect=Music[Musicselect];
Musicselect++;
Delay(500/4*Music[Musicselect]);
Musicselect++;
TR0=0;
Delay(5); //音符间短暂停顿
TR0=1;
}
else
{
TR0=0;
while(1);
}
}
}
//1ms会有一次中断
//产生500HZ的频率
void Timer0_Routine() interrupt 1
{
if(FreqTable[freselect])
{
TL0 = FreqTable[freselect]%256; //设置定时初值
TH0 = FreqTable[freselect]/256; //设置定时初值
Buzzer=!Buzzer;
}
}
3.结果
蜂鸣器之天空之城
