今天写了一段“世上只有妈妈好的
单片机程序,结果蜂鸣器一直响个不停,求指导附上595处的原理图
附上源程序:
#include<reg52.h>
#include<74hc595.h>
#include<boardinit.h>
#define uchar unsigned char
#define uint unsigned int
uchar
timer0h,timer0l,time;
//uchar beep;
//uchar led;
uchar k,i;
uchar code sszymmh[]={6,2,3, 5,2,1, 3,2,2, 5,2,2, 1,3,2, 6,2,1, 5,2,1,
6,2,4, 3,2,2, 5,2,1, 6,2,1, 5,2,2, 3,2,2, 1,2,1,
6,1,1, 5,2,1, 3,2,1, 2,2,4, 2,2,3, 3,2,1, 5,2,2,
5,2,1, 6,2,1, 3,2,2, 2,2,2, 1,2,4, 5,2,3, 3,2,1,
2,2,1, 1,2,1, 6,1,1, 1,2,1, 5,1,6, 0,0,0
};
uchar code 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};
uchar code 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(uchar t)
{
uchar t1;
unsigned long t2;
for(t1=0;t1<t;t1++)
{
for(t2=0;t2<8000;t2++)
{;}
}
TR0=0;
}
void t0int() interrupt 1
{
TR0=0;
write_byte_74hc595(0x04);
TH0=timer0h;
TL0=timer0l;
TR0=1;
}
void song()
{
TH0=timer0h;
TL0=timer0l;
TR0=1;
write_byte_74hc595(0x40);
delay(time);
write_byte_74hc595(0x00);
}
void main()
{
boardinit();
// uchar k,i;
TMOD=1; //置CT0定时工作方式1
EA=1;
ET0=1; //IE=0x82 //CPU开中断,CT0开中断
while(1)
{
i=0;
while(i<100)
{ //音乐数组长度 ,唱完从头再来
k=sszymmh[i]+7*sszymmh[i+1]-1;
timer0h=FREQH[k];
timer0l=FREQL[k];
time=sszymmh[i+2];
i=i+3;
song();
}
}
}
-
- void t0int() interrupt 1
- {
- TR0=0;
- write_byte_74hc595(0x04);
- TH0=timer0h;
- TL0=timer0l;
- TR0=1;
- }
复制代码如果没猜错,write_byte_74hc595(0x04);这个是给蜂鸣器高电平。应该改为取反,这样才能发出相应频率的脉冲。
一周热门 更多>