51单片机 - 蜂鸣器按键提示音代码

作者：王开心

main.c

#include <REGX52.H>
#include "Delay.h"
#include "Key.h"
#include "Nixie.h"
#include "Timer0.h"
#include "Buzzer.h"



unsigned char KeyNum ;



void main()
{
	Nixie(1,0);
	
	while(1)
	{	
	    KeyNum = Key();
		
		if(KeyNum)
		{
			Buzzer_Timer(100);
						
			Nixie(1,KeyNum);
		}
	
	}
}

Buzzer.c

#include "Buzzer.h"
#include "intrins.h"
#include <REGX52.H>




sbit Buzzer = P2^5; //蜂鸣器位声明

/**
  * @brief  蜂鸣器私有延时函数 延时500us
  * @param  无
  * @retval 无
  */

void Buzzer_Delay500us()		//@11.0592MHz
{
	unsigned char i;

	_nop_();
	i = 227;
	while (--i);
}


/**
  * @brief  蜂鸣器发声
  * @param  发生的延时
  * @retval 
  */


void Buzzer_Timer(unsigned int ms)
{
	unsigned int i;

	for(i=0; i<ms*2; i++)
		{
			Buzzer = !Buzzer;
			Buzzer_Delay500us();
		}
}