新人贴代码GPIO配置按键中断求助，望大家一起探讨

Mr.刘

我是新手，目前在配置GPIO按键中断遇到一个问题，一共20个按键配置好了，只有16个能用，另外4个（如图 KEY13行）没反应，网上查资料看了，觉得可能和资源冲突有关，但还是不大明白，今天上来请教了，中断代码也贴出，望指教~

代码如下：

void EXTI_Configration(void)

{          

        GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4 | GPIO_Pin_11 | GPIO_Pin_12 | GPIO_Pin_13 | GPIO_Pin_14;

        GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;

        GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

        GPIO_Init(GPIOA,&GPIO_InitStructure);

        

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

        GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;

        GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

        GPIO_Init(GPIOC,&GPIO_InitStructure);

        GPIO_ResetBits(GPIOC,GPIO_Pin_0 | GPIO_Pin_1 | GPIO_Pin_2 | GPIO_Pin_3 | GPIO_Pin_4);   

        

        GPIO_EXTILineConfig(GPIO_PortSourceGPIOC, GPIO_PinSource0);

                EXTI_ClearITPendingBit(EXTI_Line0); 

        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);

                 NVIC_PriorityGroupConfig(NVIC_PriorityGroup_4);

         NVIC_InitStructure.NVIC_IRQChannel = EXTI0_IRQn;

         NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;

         NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0; 

         NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; 

         NVIC_Init(&NVIC_InitStructure);  

         

        GPIO_EXTILineConfig(GPIO_PortSourceGPIOC, GPIO_PinSource1);

                EXTI_ClearITPendingBit(EXTI_Line1);

        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);

                 NVIC_PriorityGroupConfig(NVIC_PriorityGroup_4);

         NVIC_InitStructure.NVIC_IRQChannel = EXTI1_IRQn;

         NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;

         NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0; 

         NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; 

         NVIC_Init(&NVIC_InitStructure);

        

        GPIO_EXTILineConfig(GPIO_PortSourceGPIOC, GPIO_PinSource2);

                EXTI_ClearITPendingBit(EXTI_Line2);        

        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);

                 NVIC_PriorityGroupConfig(NVIC_PriorityGroup_4);

         NVIC_InitStructure.NVIC_IRQChannel = EXTI2_IRQn;

         NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;

         NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0; 

         NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; 

         NVIC_Init(&NVIC_InitStructure);

        

        GPIO_EXTILineConfig(GPIO_PortSourceGPIOC, GPIO_PinSource3);   

                EXTI_ClearITPendingBit(EXTI_Line3);     

        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);

                 NVIC_PriorityGroupConfig(NVIC_PriorityGroup_4);

         NVIC_InitStructure.NVIC_IRQChannel = EXTI3_IRQn; 

         NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;

         NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0; 

         NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; 

         NVIC_Init(&NVIC_InitStructure); 

        

        GPIO_EXTILineConfig(GPIO_PortSourceGPIOC, GPIO_PinSource4);

                EXTI_ClearITPendingBit(EXTI_Line4);        

        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 = EXTI4_IRQn; 

         NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;

         NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0; 

         NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; 

         NVIC_Init(&NVIC_InitStructure); 

}

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Mr.刘

唉，希望大神的出现