询问中断函数

richard.lin

以下是我用单一I/O口测试中断函数点亮LED灯,当我设定PA0为中断线对应单一个中断函数EXTI0_IRQHandler时, compiler过后测试可正常点亮LED灯

但是设定PA11的中断线使用共用的中断函数EXTI15_10_IRQHandler, compiler却不会进入中断函数的回圈里(红色标注部分),硬体方面按键也无反应

另一共用中断函数EXTI9_5IRQHandler是可用的,想询问大大知道原因为何?

----------------------------main--------------------

int main(void)

 {

delay_init();      

NVIC_Configuration();

uart_init(9600);

  LED_Init();  

KEY_Init();        

EXTIX_Init();

LED0=0; LED1=0 ;

while(1)

{

}

 }

------------------------key------------------

#define KEY2  GPIO_ReadInputDataBit(GPIOA,GPIO_Pin_11)

#define KEY3  GPIO_ReadInputDataBit(GPIOA,GPIO_Pin_0)

void KEY_Init(void) 

{

GPIO_InitTypeDef GPIO_InitStructure;

  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE);

GPIO_InitStructure.GPIO_Pin  = GPIO_Pin_0|GPIO_Pin_11;

GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU; 

  GPIO_Init(GPIOA, &GPIO_InitStructure);

}

-------------------------EXTI---------------------------

void EXTIX_Init(void)

{

 

  EXTI_InitTypeDef EXTI_InitStructure;

  NVIC_InitTypeDef NVIC_InitStructure;

    KEY_Init();

  RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO,ENABLE);

 

GPIO_EXTILineConfig(GPIO_PortSourceGPIOA,GPIO_PinSource0);

EXTI_InitStructure.EXTI_Line=EXTI_Line0;

  EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;

  EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;

  EXTI_InitStructure.EXTI_LineCmd = ENABLE;

  EXTI_Init(&EXTI_InitStructure);

  GPIO_EXTILineConfig(GPIO_PortSourceGPIOA,GPIO_PinSource11); 

  EXTI_InitStructure.EXTI_Line=EXTI_Line11;

EXTI_Init(&EXTI_InitStructure);

  NVIC_InitStructure.NVIC_IRQChannel = EXTI0_IRQn;

  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x02;

  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x00;

  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;

  NVIC_Init(&NVIC_InitStructure); 

  NVIC_InitStructure.NVIC_IRQChannel = EXTI15_10_IRQn;

  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x0F;

  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x0F;

  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;

  NVIC_Init(&NVIC_InitStructure);     

void EXTI0_IRQHandler(void)

{u8 key=0;

delay_ms(10);

key=KEY_Scan(1);

if (EXTI_GetITStatus(EXTI_Line0) != RESET)

{if(KEY3==0)

{  

LED0=!LED0;

if(key!=0)

printf("%d",key);

}

EXTI_ClearITPendingBit(EXTI_Line0); 

}

void EXTI15_10_IRQHandler(void)

{

u8 key=0;

delay_ms(10);

key=KEY_Scan(1);

if (EXTI_GetITStatus(EXTI_Line11) != RESET)

{if(KEY2==0)  

{  

LED1=!LED1;

if(key!=0)

printf("%d",key);

}

EXTI_ClearITPendingBit(EXTI_Line11); 

}

}

正点原子

参考下我们战舰板的中断实验。

richard.lin

战舰板的手册里面有说明,但是使用的时候确实发生此问题

如果使用EXTI15_10_IRQHandler此中断函数,还需多增加哪些定义吗?

正点原子

回复【3楼】richard.lin:
---------------------------------
看你的配置没问题啊。
15_10没什么区别的。