stm32 按键中断问题

TDB

我用PE0 ----PE4五个端口做的外部中断按键，下降沿触发，但是现在出现的情况是，按键多按几次，就会出现一些按键失灵，不会进入中断，因为五个按键中断对应的是5个优先级，高优先级的那个按键不会出现失灵，这是什么情况呢？下面大概是配置函数

//按键

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1 | GPIO_Pin_2 | GPIO_Pin_3 | GPIO_Pin_4;

//GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz;

GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;  

GPIO_Init(GPIOE, &GPIO_InitStructure);

//°??ü????????

GPIO_EXTILineConfig(GPIO_PortSourceGPIOE, 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_PortSourceGPIOE, GPIO_PinSource1);

EXTI_InitStructure.EXTI_Line = EXTI_Line1;

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_PortSourceGPIOE, GPIO_PinSource2);

EXTI_InitStructure.EXTI_Line = EXTI_Line2;

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_PortSourceGPIOE, GPIO_PinSource3);

EXTI_InitStructure.EXTI_Line = EXTI_Line3;

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_PortSourceGPIOE, GPIO_PinSource4);

EXTI_InitStructure.EXTI_Line = EXTI_Line4;

EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;

EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;

EXTI_InitStructure.EXTI_LineCmd = ENABLE;

EXTI_Init(&EXTI_InitStructure);

        NVIC_PriorityGroupConfig(NVIC_PriorityGroup_4);

        NVIC_InitStructure.NVIC_IRQChannel = EXTI0_IRQChannel;

NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 10;

NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;

NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;

NVIC_Init(&NVIC_InitStructure);

NVIC_InitStructure.NVIC_IRQChannel = EXTI1_IRQChannel;

NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 9;

NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;

NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;

NVIC_Init(&NVIC_InitStructure);

NVIC_InitStructure.NVIC_IRQChannel = EXTI2_IRQChannel;

NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 8;

NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;

NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;

NVIC_Init(&NVIC_InitStructure);

NVIC_InitStructure.NVIC_IRQChannel = EXTI3_IRQChannel;

NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 7;

NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;

NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;

NVIC_Init(&NVIC_InitStructure);

NVIC_InitStructure.NVIC_IRQChannel = EXTI4_IRQChannel;

NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 6;

NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;

NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;

NVIC_Init(&NVIC_InitStructure);

中断函数：
    void EXTI4_IRQHandler(void)

{

//  ---backlight

//NVIC_InitTypeDef NVIC_InitStructure;              //我想关闭中断，执行完中断函数后关闭中断，这里应该怎么解决呢？？？

//NVIC_InitStructure.NVIC_IRQChannel = EXTI4_IRQChannel;

  //NVIC_InitStructure.NVIC_IRQChannelCmd = DISABLE;

      //NVIC_Init(&NVIC_InitStructure);

Delaya(0xaffff);

if(GPIO_ReadInputDataBit(GPIOE, GPIO_Pin_4) == RESET)   //去抖

{

if(EXTI_GetITStatus(EXTI_Line4) != RESET)

{

Beep();

if(BackLightFlag == 1)

{

BackLightOn();

BackLightFlag = 0;

}

else

{

BackLightOff();

BackLightFlag = 1;

}

EXTI_ClearITPendingBit(EXTI_Line4);

}

}

//NVIC_InitStructure.NVIC_IRQChannel = EXTI4_IRQChannel;

//NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;

      //NVIC_Init(&NVIC_InitStructure);

正点原子

可以仿真看看怎么回事。如果最高优先级的中断服务函数，老是不退出，其他按键就没法响应中断了。。。

TDB

回复【2楼】正点原子:
---------------------------------
那我想在进入一个中断后关闭外部中断（所有外部中断或者当前中断）该怎么操作呢？我用的如下的代码，好像不行，还是会出现同样的问题
       void EXTI0_IRQHandle()
{
        NVIC_InitTypeDef NVIC_InitStructure;

NVIC_InitStructure.NVIC_IRQChannel = EXTI1_IRQChannel;
NVIC_InitStructure.NVIC_IRQChannelCmd = DISABLE;
NVIC_Init(&NVIC_InitStructure);
         。
         。
        中断处理函数
        。
         。
        NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}

不过貌似没有作用，那怎么关闭外部中断呢？

正点原子

回复【3楼】TDB:
---------------------------------
在我们的sys.c里面有个关闭全部中断的小函数,用的汇编代码,你看到了么?