关于中断查询的问题

北方的马克思

配置如下：

[mw_shl_code=c,true]void Nvic_Init(void) { NVIC_InitTypeDef NVIC_InitStructure; NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2); [/mw_shl_code] [mw_shl_code=c,true] NVIC_InitStructure.NVIC_IRQChannel = EXTI15_10_IRQn ; //开启EXTI15_10中断 NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0; //抢占优先级 0 NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0; //响应优先级 0 NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; NVIC_Init(&NVIC_InitStructure); } [/mw_shl_code]

[mw_shl_code=c,true]void Exti_Init(void) { EXTI_InitTypeDef EXTI_InitStructure; GPIO_InitTypeDef GPIO_InitStructure; RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB|RCC_APB2Periph_AFIO, ENABLE); //使能GPIO外设模块时钟使能 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12 | GPIO_Pin_13 | GPIO_Pin_14 | GPIO_Pin_15; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU; GPIO_Init(GPIOB, &GPIO_InitStructure); //外部中断线配置，选择中断线管脚 GPIO_EXTILineConfig(GPIO_PortSourceGPIOB, GPIO_PinSource12); [/mw_shl_code] [mw_shl_code=c,true] GPIO_EXTILineConfig(GPIO_PortSourceGPIOB, GPIO_PinSource13); [/mw_shl_code] [mw_shl_code=c,true] GPIO_EXTILineConfig(GPIO_PortSourceGPIOB, GPIO_PinSource14); [/mw_shl_code] [mw_shl_code=c,true] GPIO_EXTILineConfig(GPIO_PortSourceGPIOB, GPIO_PinSource15); [/mw_shl_code] [mw_shl_code=c,true] //对中断线进行中断设置 EXTI_InitStructure.EXTI_Line = EXTI_Line12 | EXTI_Line13 | EXTI_Line14 | EXTI_Line15 ; EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt; //设置为中断请求，非事件请求 EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling; //设置中断触发方式为下降沿触发 EXTI_InitStructure.EXTI_LineCmd = ENABLE; //外部中断使能 EXTI_Init(&EXTI_InitStructure); //初始化中断 //清空中断标志 EXTI_ClearITPendingBit(EXTI_Line12); EXTI_ClearITPendingBit(EXTI_Line13); EXTI_ClearITPendingBit(EXTI_Line14); EXTI_ClearITPendingBit(EXTI_Line15); }[/mw_shl_code]

[mw_shl_code=c,true]void EXTI15_10_IRQHandler(void) { if(EXTI_GetITStatus(EXTI_Line12) != RESET) { } //////////////////////////////////////// else if(EXTI_GetITStatus(EXTI_Line13) != RESET) { } //////////////////////////////////////// else if(EXTI_GetITStatus(EXTI_Line14) != RESET) { } //////////////////////////////////////// else if(EXTI_GetITStatus(EXTI_Line15) != RESET) { } /////////////////////////////////////// EXTI_ClearITPendingBit(EXTI_Line12); EXTI_ClearITPendingBit(EXTI_Line13); EXTI_ClearITPendingBit(EXTI_Line14); EXTI_ClearITPendingBit(EXTI_Line15); }[/mw_shl_code]

现象：
进入EXTI15_10_IRQHandler后，每次不管是那根线触发中断，都只进第一个中断；也就是我把line12,13 ,14,15哪根线写在

北方的马克思

现象没写全，不好意思。不管是哪根中断线发生中断，函数里先查询哪根中断线，就一直响应哪根中断线。有谁碰到过类似情况没，麻烦各位帮我看看，谢谢。

正点原子

看代码没问题。。仿真下看看吧。