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看了课本之后,,,忍不住做了一个,,,,可惜毕竟蜂咛器声音不好听,也无法追求太好的感觉了,
不过,换成扬声器就好多了,只是,,,,,刚按几下,扬声器烧了,,,,
附上程序
#include <reg52.h>
sbit speaker=P1^0;
unsigned char keys;
unsigned char tone[]={108,102,91,86,77,68,61,57};
void sound(unsigned char);
void delay8weimiao(unsigned char );
main()
{P2=0xff;
while(1)
{ keys=~P2;
switch(keys)
{ case 0x01:sound(0);break;
case 0x02:sound(1);break;
case 0x04:sound(2);break;
case 0x08:sound(3);break;
case 0x10:sound(4);break;
case 0x20:sound(5);break;
case 0x40:sound(6);break;
case 0x80:sound(7);break;
}
}
}
void sound(unsigned char x)
{char i;
for(i=0;i<60;i++)
{ speaker=1;
delay8weimiao(tone[x]);
speaker=0;
delay8weimiao(tone[x]);
}
}
void delay8weimiao(unsigned char x)
{unsigned char i,j;
for(i=0;i<x;i++)
for(j=0;j<1;j++);
}
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