PIC Microcontroller - Buzzer Usage Example

Example of use:

/****************************************************** ******************************

* Jumper connection: short-circuit P2 2 and 3

* Function description: Passive buzzer sound

*************************************************** *******************************/

#include

#include

#define uint8 unsigned char

#define uint16 unsigned int

__CONFIG(WDTDIS & LVPDIS & HS & PWRTDIS & BORDIS); //Set configuration bits

//WDTDIS:disable watchdog timer

//LVPDIS: low voltage programming disabled

//HS:high speed crystal/resonator

//PWRTDIS:disable power up timer

//BORDIS:disable brown out reset

/***************************Declare function*******************************************/

void DelayUS(uint8 delay);

/****************************************************** ******************************

* Function name: DelayUS(uint8 delay)

* Function: microsecond delay for 20MHZ

* Input parameter: delay

* Return: None

*************************************************** *******************************/

void DelayUS(uint8 delay)

{

while(--delay);

}

/****************************************************** *****************************

* Function name: main(void)

* Function: drive the passive buzzer to sound

* Input parameters: None

* Return: None

*************************************************** *******************************/

void main(void)

{

ADCON1 = 0x86; //PORTA is set as digital IO port

TRISA0 = 0; //RA0 is set to output mode

while(1)

{

RA0 = 1;

DelayUS(400);

RA0 = 0;

DelayUS(400);    

}

}