pd3keyint._c

ATmega16应用例子

#include <iom16v.h>
#include "E:\ICC_H\CmmICC.H"

#define DISP_DDR	DDRB
#define DISP_PORT  	PORTB
#define IN_PD3		cbi(DDRD,3)		//PD3
#define SET_PD3		sbi(PORTD,3)
#define GET_PD3		gbi(PIND,3)

#pragma interrupt_handler int1_isr:3
void int1_isr(void)
{
	GICR &= 0b01111111;		   	// disable int1 interrupt
	DISP_PORT++;
	delay50ms(4);
	GICR |= 0b10000000; 		// enable int1 interrupt
}

void int1_init()
{
 	IN_PD3; 				// set PD3/INT1 as input
	SET_PD3;				// set PD3/INT1 output high level,avoid triggering
	MCUCR |= 0b11110011;		// set PD3/INT1 as low level active
	GICR  |= 0b10000000;		// enable global interrupt
	SEI();	 	  				// enable external interrupt
}

void main(void)
{
	DISP_DDR  = 0xFF;
	DISP_PORT = 0x00;
	int1_init();
	asm("sleep");				// set mcu as sleep modle
	while(1);
}