PIC18F4580 – Buzzer Interfacing

In PIC18F4580 Mini Development Board we could interface buzzer by GPIO pin. Buzzer get connected at port pins RE0 via jumpers J19. If jumper is left open, then the corresponding port pin can be used independently. The sample code given below turn ON/OFF the Buzzer in a millisecond delay .

Schematic

Sample Code

/********************************************************************************
*                                 Header Files                                  *
********************************************************************************/
#include<pic18.h>		
/********************************************************************************
                               Function Declerations
********************************************************************************/
void Delay_Ms(unsigned int);
/********************************************************************************
                                 Main Program
********************************************************************************/
void main()
{
 ADCON1=0X07;                                 /* SETTING RE0 AS DIGITAL PIN    */
 TRISE0=0;                                    /* SETING RE0 AS OUT PUT PIN     */
 while(1)
 {
  RE0=1;                                      /* BUZZER ON                     */
  Delay_Ms(500);                              /* Delay Fuction Is Called 500Ms */
  RE0=0;                                      /* BUZZER OFF                    */
  Delay_Ms(500);                              /* Delay Fuction Is Called 500Ms */
 }
}
/********************************************************************************
                             DELAY IN MILLISECONDS
********************************************************************************/
void Delay_Ms(unsigned int ms)
{
 int i,count;
 for(i=1;i<=ms;i++)
 {
  count=498;
  while(count!=1)
  {
   count--;
  }
 }
}