AT89S52 Development Board (Mini) – Buzzer Interfacing

In AT89S52 Mini Development Board has an on board buzzer, connected to port pin P1.6 via jumper (J5). If the jumper is left open, then the corresponding port pin can be used independently. The sample code for testing the buzzer is given below. When the controller on the mini development board is programmed using this sample code, the buzzer produces a beep sound on each switch(SW1) press.SchematicSample Code

/************************************************************
                       HEADER FILES
*************************************************************/
#include <REGX52.H>
#define SW1 P2_0
#define beep P1_6

/************************************************************
                      MAIN FUNCTION
*************************************************************/
void main()
{
 while(1)
 {                     /* Check for switch press            */
  if(SW1==0)           /* If SW1 is pressed, P2_0 gets low  */     
  {
    beep=0;            /* Turn on the buzzer                */
    while(SW1==0);     /* Wait here till switch is released */
    beep=1;            /* Turn off the buzzer               */
  }
 }
}

/*******************  END OF PROGRAM  ***********************/

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

HEADER FILES

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

#include <REGX52.H>

#define SW1 P2_0

#define beep P1_6

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

MAIN FUNCTION

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

void main()

{

while(1)

{ /* Check for switch press */

if(SW1==0) /* If SW1 is pressed, P2_0 gets low */

{

beep=0; /* Turn on the buzzer */

while(SW1==0); /* Wait here till switch is released */

beep=1; /* Turn off the buzzer */

}

/******************* END OF PROGRAM ***********************/

Topics related to AT89S52 Mini Development Board

AT89S52 Mini Development Board – Overview
AT89S52 Mini Development Board – LED Interfacing
AT89S52 Mini Development Board – LCD Interfacing
AT89S52 Mini Development Board – Serial communication
AT89S52 Mini Development Board – EEPROM Interfacing
AT89S52 Mini Development Board – Buzzer Interfacing
AT89S52 Mini Development Board – Servo Motor Interfacing
AT89S52 Mini Development Board – Switch Interfacing
AT89S52 Mini Development Board – RFID Interfacing

Resources

Softwares
- ISP_AT89S
- Keil uVison 3
Datasheets
- AT 89S52
- AT 89S51
- LM 7805
- MAX 232
- 24C04
- CP 2102

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