sound.c

来自「蜂鸣器在单片机上的应用,C语言源码,Keil uVision3工程文件,附原理图」· C语言 代码 · 共 41 行

#include <reg52.h>
#include <ctype.h>
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include <math.h>
#include <absacc.h>

#define uchar unsigned char
#define uint unsigned int
#define ulong unsigned long

sbit sound=P1^5;

void delay(uchar delay_temp);//长延时

main(void)
{
start:	sound=0;//鸣响第一次
       	delay(0xff);
       	sound=1;
       	delay(0xff);
       	sound=0;//鸣响第二次
       	delay(0x7f);
       	sound=1;
       	delay(0xff);
       	sound=0;//鸣响第三次
       	delay(0x3f);
       	sound=1;
       	delay(0xff);
	goto start;	
}

void delay(uchar delay_temp)//延时子程序
{
	uchar i,j;
	for(i=0;i<delay_temp;i++)
	{
		for(j=0;j<255;j++);
	}
}