beep.h

AVR单片机c语言的开发板程序

#ifndef _BEEP_
#define _BEEP_

#include <avr/io.h>

#define beep_off() DDRA |= (1 << PA3);PORTA &= ~(1 << PA3)
#define beep_on() DDRA |= (1 << PA3);PORTA |= (1 << PA3)

#endif