瑞萨单片机外部中断程序

瑞萨单片机外部中断程序

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

/* */

/* FILE :int00.c */

/* DATE :Sat, Aug 06, 2011 */

/* DESCRIPTION :main program file. */

/* CPU GROUP :2L */ /* */

/* This file is generated by Renesas Project Generator (Ver.4.19). */

/* NOTE:THIS IS A TYPICAL EXAMPLE. */ /***********************************************************************/

#include "sfr_r82l.h" //r8c头文件

#define uchar unsigned char

#define uint unsigned int

void INT_INT0(void);

void int0_irq(void);

void init_int0(void);

void main(void);

uchar data=0;

void main(void)

{init_int0();

asm(" fset i"); //中断允许

while(1);

}

void INT_INT0(void){

data++;

if(data>=4) data=0;

p2=data;

}

#pragma INTERRUPT int0_irq(vect=29) //vect=29中断入口地址，不能少

void int0_irq(void){

INT_INT0();

}

void init_int0(void){

pd4_5=0;

pd2=0xff;

p2=0x00;

int0ic=0b00000000; //interrupt enable inten=0b00000001; //interrupt is int0

intf=0b00000011; //int0 input filter

int0ic=0b00000001;

}