ATMega16单片机外部中断的使用

ATMega16单片机外部中断的使用[日期:2010-09-24 ] [来源:本站原创作者:佚名] [字体：大中小] (投递新闻) // Crystal: 7.3728Mhz ,功能：学习外部中断0的程序

#include

#include

#define LED_COM PORTA ^= (1 << PA6) //

void port_init(void)

{

PORTA = 0x40;

DDRA = 0x40;

PORTB = 0x00;

DDRB = 0x00;

PORTC = 0x00; //m103 output only

DDRC = 0x00;

PORTD = 0x04;

DDRD = 0x00;

}

#pragma interrupt_handler int0_isr:2

void int0_isr(void)

LED_COM;

}

//call this routine to initialize all peripherals void init_devices(void)

{

//stop errant interrupts until set up

CLI(); //disable all interrupts

port_init();

MCUCR = 0x00;

GICR = 0x40;

TIMSK = 0x00; //timer interrupt sources SEI(); //re-enable interrupts

//all peripherals are now initialized

}

void main()

{

init_devices();

while(1)

; }

}