51 MCU buzzer program-EEWORLD

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#include"reg52.h"

typedef unsigned char u8;

typedef unsigned int u16;

sbit beep=P1^5;

void delay(u16 i)

{

while(i--);

}

void main()

{

while(1)

{

beep=~beep;

delay(1000); //control tone frequency

beep=~beep;/control the volume of the sound

delay(10);

}

Reference address：51 MCU buzzer program

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