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楼主

你画我瞎|

楼主 | 2020-4-26 15:38 | 只看该作者回帖奖励

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pi, IO, GPIO, gp, TI

STM32F103芯片，做按键功能，不一样的端口（PORTA,PORTC），引脚都是pin8，我软件配置了，
却发现只能进一个中断，不知道为啥，电路都是一样的，估计是软件没有区分出来，不知道该怎么办，能否指导一下？，谢谢代码如下

void  Button_GPIO_Init(void)
{
            GPIO_InitTypeDef  GPIO_InitStructure;

            RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA|RCC_APB2Periph_GPIOC|RCC_APB2Periph_AFIO,ENABLE);

            GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
            GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
            GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8;
            GPIO_Init(GPIOA, &GPIO_InitStructure);
         GPIO_EXTILineConfig(GPIO_PortSourceGPIOA,GPIO_PinSource8);

            GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
            GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
            GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8;
            GPIO_Init(GPIOC, &GPIO_InitStructure);
         GPIO_EXTILineConfig(GPIO_PortSourceGPIOC,GPIO_PinSource8);

            EXTI_InitTypeDef  EXTI_InitStructure;

            EXTI_InitStructure.EXTI_Line =EXTI_Line8;
            EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
            EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising_Falling;
            EXTI_InitStructure.EXTI_LineCmd = ENABLE;
            EXTI_Init(&EXTI_InitStructure);

            NVIC_InitTypeDef  NVIC_InitStructure;

            NVIC_PriorityGroupConfig(NVIC_PriorityGroup_0);
            NVIC_InitStructure.NVIC_IRQChannel = EXTI9_5_IRQn;
            NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
            NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
            NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
            NVIC_Init(&NVIC_InitStructure);
      }

void EXTI9_5_IRQHandler(void)
{
      if(EXTI_GetITStatus(EXTI_Line8) != RESET)
      {

      EXTI_ClearITPendingBit(EXTI_Line8);
      }

      if(EXTI_GetITStatus(EXTI_Line8) != RESET)
      {

      EXTI_ClearITPendingBit(EXTI_Line8);
      }
}

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1779564238 2020-5-21 17:47 回复TA
进中断之后再判断一次IO的状态，其实没必要用中断

按键区分不出来

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