NEX ROBOTICS Fire Bird V ATMEGA2560 Software Manual page 24

NEX Robotics
2.4 Writing your first code in AVR Studio
This program will make robot's buzzer beep.
Copy the following code in window "code area" as shown in figure 2.25. We will see how this
code works in the next chapter.
//Buzzer is connected at the third pin of the PORTC
//To turn it on make PORTC 3
#include <avr/io.h>
#include <avr/interrupt.h>
#include <util/delay.h>
//Function to initialize Buzzer
void buzzer_pin_config (void)
{
DDRC = DDRC | 0x08;
PORTC = PORTC & 0xF7;
}
void port_init (void)
{
buzzer_pin_config();
}
void buzzer_on (void)
{
unsigned char port_restore = 0;
port_restore = PINC;
port_restore = port_restore | 0x08;
PORTC = port_restore;
}
void buzzer_off (void)
{
unsigned char port_restore = 0;
port_restore = PINC;
port_restore = port_restore & 0xF7;
PORTC = port_restore;
}
void init_devices (void)
{
cli(); //Clears the global interrupts
port_init();
sei(); //Enables the global interrupts
}
//Main Function
int main(void)
{
init_devices();
while(1)
{
buzzer_on();
_delay_ms(1000);
buzzer_off();
_delay_ms(1000);
}
}
www.nex-robotics.com
rd
(PC3 )pin logic 1
//Setting PORTC 3 as output
//Setting PORTC 3 logic low to turnoff buzzer
//delay
//delay
Fire Bird V Software Manual
24