最近用到stm32的外部中断的时候，又碰到了一个奇怪的问题，百思不得其解，求大神指导

华夏小川

       最近，使用stm32的外部中断，EXTI15_10_IRQHandler死活不受控制，便又折腾了半天发现了一个奇怪的事，我试过了EXTI0_IRQHandler、EXTI2_IRQHandler、EXTI3_IRQHandler，外部中断都没有问题，可是EXTI0_IRQHandler，我没有给信号也不停的往中断跑，代码如下：
void EXTIx_Init(void)
{
EXTI_InitTypeDef EXTI_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
GPIO_InitTypeDef GPIO_InitStructure;

RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA|RCC_APB2Periph_AFIO,ENABLE);  //使能PA端口时钟 复用功能

// GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2|GPIO_Pin_13|GPIO_Pin_14|GPIO_Pin_15; //选中管脚
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2|GPIO_Pin_0|GPIO_Pin_3|GPIO_Pin_14; //选中管脚
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;  //上拉输RU
GPIO_Init(GPIOA,&GPIO_InitStructure);


NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2); //选择中断分组2

NVIC_InitStructure.NVIC_IRQChannel = EXTI2_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 2; //抢占优先级2
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;  //子优先级2
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;  //中断优先级初始化
NVIC_Init(&NVIC_InitStructure);

NVIC_InitStructure.NVIC_IRQChannel = EXTI0_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 2; //抢占优先级2
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 2;  //子优先级2
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;  //中断优先级初始化
NVIC_Init(&NVIC_InitStructure);

NVIC_InitStructure.NVIC_IRQChannel = EXTI3_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1; //抢占优先级2
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 2;  //子优先级2
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;  //中断优先级初始化
NVIC_Init(&NVIC_InitStructure);

NVIC_InitStructure.NVIC_IRQChannel = EXTI15_10_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1; //抢占优先级2
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;  //子优先级2
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;  //中断优先级初始化
NVIC_Init(&NVIC_InitStructure);

//GPIO 中断线以及中断初始化配置，下降沿触发
EXTI_ClearITPendingBit(EXTI_Line0);
EXTI_ClearITPendingBit(EXTI_Line2);
EXTI_ClearITPendingBit(EXTI_Line3);
EXTI_ClearITPendingBit(EXTI_Line14);

GPIO_EXTILineConfig(GPIO_PortSourceGPIOA,GPIO_PinSource0);
GPIO_EXTILineConfig(GPIO_PortSourceGPIOA,GPIO_PinSource2);//GPIOa2
GPIO_EXTILineConfig(GPIO_PortSourceGPIOA,GPIO_PinSource3);
GPIO_EXTILineConfig(GPIO_PortSourceGPIOA,GPIO_PinSource14);
EXTI_InitStructure.EXTI_Line = EXTI_Line0|EXTI_Line2|EXTI_Line3|EXTI_Line14;//|EXTI_Line15;  //中短线
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;
EXTI_InitStructure.EXTI_LineCmd = ENABLE;
EXTI_Init(&EXTI_InitStructure);
}

void EXTI2_IRQHandler(void)
{

if(EXTI_GetITStatus(EXTI_Line2) !=RESET)
{
TIMxCHx_PinLv_Count++;
EXTI_ClearITPendingBit(EXTI_Line2);   //清除line2上的中断标志

}

}

void EXTI0_IRQHandler(void)
{
if(EXTI_GetITStatus(EXTI_Line0) !=RESET)
{
TIMxCHx_PinLv_Count++;
EXTI_ClearITPendingBit(EXTI_Line0);   //清除line2上的中断标志

}

}

void EXTI3_IRQHandler(void)
{
if(EXTI_GetITStatus(EXTI_Line3) !=RESET)
{
TIMxCHx_PinLv_Count++;
EXTI_ClearITPendingBit(EXTI_Line3);   //清除line2上的中断标志

}

}

void EXTI15_10_IRQHandler(void)
{
if(EXTI_GetITStatus(EXTI_Line13) !=RESET)
{
TIMxCHx_PinLv_Count++;
EXTI_ClearITPendingBit(EXTI_Line13);
}
if(EXTI_GetITStatus(EXTI_Line14) !=RESET)
{
TIMxCHx_PinLv_Count++;
EXTI_ClearITPendingBit(EXTI_Line14);
}
if(EXTI_GetITStatus(EXTI_Line15) !=RESET)
{
TIMxCHx_PinLv_Count++;
EXTI_ClearITPendingBit(EXTI_Line15);
}
}

EXTI0_IRQHandler、EXTI2_IRQHandler、EXTI3_IRQHandler这三个已经实测，都没有问题，可是EXTI15_10_IRQHandler不受控制，一样的初始化代码，实在是搞不明白了，求大神们指点啊

lycreturn

PA14  用做了下载接口    关闭JTAG 和SW才能做IO口用   你可以试试PB14

正点原子

所有中断我都用过，没发现你说的问题。

华夏小川

回复【3楼】正点原子:
---------------------------------
你也是用的库函数么，难道是我的芯片坏了，不过哪几个io输出高低电平受控制

正点原子

回复【4楼】华夏小川:
---------------------------------
我用寄存器的。

caosix

回复【5楼】正点原子:
---------------------------------
原子老大：：昨天下单买了 F103RCT6 的开发板，，

就是 相中 你的 “寄存器版本”。。（重庆）。。

说起：ST的库，就老火，，无法 完全 脱离硬件。

还不如：跟着 原子老大 学习 寄存器编程。小开发足够。

正点原子

回复【6楼】caosix:
---------------------------------
谢谢支持