蜂鸣器介绍

音符频率对照表

蜂鸣器播放提示音

#include <REGX52.H>
#include <INTRINS.H>
//蜂鸣器端口：
sbit Buzzer=P1^5;
void Buzzer_Delay500us()		//@12.000MHz
{unsigned char i;_nop_();i = 247;while (--i);
}
void Buzzer_Time(unsigned int ms)
{unsigned int i;for(i=0;i<ms*2;i++){Buzzer=!Buzzer;Buzzer_Delay500us();}
}unsigned char KeyNum;
void main()
{Nixie(1,0);// 数码管显示0while(1){KeyNum=Key();// 获取独立按键键码if(KeyNum){Buzzer_Time(100);Nixie(1,KeyNum);}}
}