speak.c

蜂鸣器的作用 蜂鸣器是一种一体化结构的电子讯响器

#include<reg51.h>
#include<stdio.h>

#include <absacc.h>




#define uchar   unsigned char
#define uint    unsigned int


sbit a=P2^0;
sbit b=P2^1;

void delay(int x)
{
int i,j;
for(i=x;i>0;i--)for(j=x;j>0;j--);
}

void speak(uint time,uint shengdiao)
{
int k;
for(k=time;k>0;k--)
	{
	a=1;b=0;
	delay(shengdiao);
	a=0;b=1;
	delay(shengdiao);
	}
}

void main()
{
	while(1)
	{
	speak(50,2);
	speak(50,4);
	speak(50,6);
	speak(50,8);
	speak(50,10);
	speak(50,12);
	speak(50,15);
	speak(40,20);
	speak(30,25);
	speak(20,30);
	speak(10,40);

	speak(10,42);
	speak(20,32);
	speak(30,22);
	speak(40,20);
	speak(50,15);
	speak(50,12);
	speak(50,10);
	speak(50,8);
	speak(50,4);
	speak(50,2);





	};
}