iar for stm8外部中断程序

写了一个程序却怎么进不了中断谁知道问题出在哪里？附程序#include "iostm8s003f3.h"#define uchar unsigned char#define uint unsigned int#define M_OPEN PC_ODR_ODR4=1#define M_OFF PC_ODR_ODR4=0#define F_OPEN PC_ODR_ODR3=1#define F_OFF PC_ODR_ODR3=0#define LED_OPEN PD_ODR_ODR4=0#define LED_OFF PD_ODR_ODR4=1void GPIO_Nint(){PD_DDR|=(1<<4) ;PD_CR1|=(1<<4);PD_CR2&=0XEF;PC_DDR|=(1<<3)|(1<<4);PC_CR1|=(1<<3)|(1<<4);PC_CR2&=0XE7;//PA_DDR&=0XF7;//PA_CR1&=(1<<3);//PA_CR2&=0XF7;PB_DDR&=0XDF;PB_CR1&=(1<<5);PB_CR2&=0XDF;M_OFF;F_OFF;LED_OFF;}void delay(uint ms){uint b;uint a; for(a=ms;a>0;a--) { for(b=60;b>0;b--); }}void work(){M_OPEN ;F_OPEN ; LED_OPEN;}void half(){M_OFF ;F_OFF ; LED_OFF ;}void EXTI_init(void){ EXTI_CR1=0x04;}void main(){ asm("sim"); EXTI_init(); GPIO_Nint(); asm("rim"); while(1) { work(); }} #pragma vector=0x06__interrupt void EXTI_PB5_(){ while(1) {half(); }}