beep.c

在STC51上开发的一个电子称程序 KEILUV3环境开发

#include "hardware.h"

void delayxms(uchar x)
{
uchar i,j;
for(i=0;i<x;i++)
for(j=0;j<138;j++);
}

void Beep0ms(void)
  {
   Buzzer=1;
   }

void Beep10ms(void)
  {
   Buzzer=~Buzzer;

   delayxms(10);

   Buzzer=~Buzzer;
  }

void Beep30ms(void)
  {
   Lcd_BK=0; //开背光
   Buzzer=~Buzzer;
   Lcd_BK=1; //关背光
   delayxms(30);
   Buzzer=~Buzzer;
  }

void Beep50ms(void)
  {
   Lcd_BK=0; //开背光
   Buzzer=~Buzzer;
   Lcd_BK=1; //关背光
   delayxms(50);
   Buzzer=~Buzzer;
   delayxms(950);
  }

void Beep1000ms(void)
  {
   Lcd_BK=0; //开背光
   Buzzer=~Buzzer;
   Lcd_BK=1; //关背光
   delayxms(1000);
   Buzzer=~Buzzer;
  }



void Beep(uchar type)
{
  switch(type)
   {case 0 : Beep0ms(); break;
	case 1 : Beep10ms();break;
	case 2 : Beep30ms();break;
	case 3 : Beep50ms();break;
	case 4 : Beep1000ms();break;
	default: break;
    }
}