相互干扰

1万 · 2016-10-30 18:22

STM32F103 设置6个外部按键中断相互干扰

1万 · 2016-10-30 18:27

楼主详细说说怎么回事啊，这么说太笼统了

1万 · 2016-10-30 18:29

如题。
我设置GPIOG 0-5一共6个按键做外部中断，5K电阻上拉到3.3V。现在的问题是按下其中一个按键时，除了该按键的中断响应以外，其他按键的中断有时候也被响应

1万 · 2016-10-30 18:30

然后呢？你是怎么应对这个的呢

1万 · 2016-10-30 18:34

1.硬件上面，外部接了5K的上拉电阻。
2.软件上面我设置成上拉，同样也是没有效果。
3.我换了几个STM32，都有同样的问题。
4.请教，这个问题是不是STM32的BUG啊！

只看该作者 · 2016-10-30 18:35

楼主程序可以公开吗？贴程序看下吧，这么说看不出什么原因

1万 · 2016-10-30 18:38

void EXTI_SetupNVIC(void)
{
      NVIC_InitTypeDef NVIC_InitStructure;

      NVIC_SetVectorTable(NVIC_VectTab_FLASH,0x0);

      /*Configureonebitforpreemptionpriority*/
      NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);// 1bitsforpre-emptionpriority //3bitsforsubpriority*/)
      /*EnabletheEXTI9_5Interrupt*/
      NVIC_InitStructure.NVIC_IRQChannel=EXTI0_IRQn;
      NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=1;
      NVIC_InitStructure.NVIC_IRQChannelSubPriority=0;
      NVIC_InitStructure.NVIC_IRQChannelCmd=ENABLE;
      NVIC_Init(&NVIC_InitStructure);

//       NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);
      /*EnabletheEXTI15_10Interrupt*/
      NVIC_InitStructure.NVIC_IRQChannel=EXTI1_IRQn;
      NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=0;
      NVIC_InitStructure.NVIC_IRQChannelSubPriority=1;
      NVIC_InitStructure.NVIC_IRQChannelCmd=ENABLE;
      NVIC_Init(&NVIC_InitStructure);


      /*EnabletheEXTI15_10Interrupt*/
      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);


      /*EnabletheEXTI15_10Interrupt*/
      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);


      /*EnabletheEXTI15_10Interrupt*/
      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);

      /*EnabletheEXTI15_10Interrupt*/
      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 EXTI_SetupGPIO(void)
{
      GPIO_InitTypeDef GPIO_InitStructure;/* ¶¨ÒåÒ»¸öGPIO³õÊ¼»¯½á¹¹Ìå */
/*ConfigurePB9asinputfloating(EXTILine9)*/
      GPIO_InitStructure.GPIO_Pin=GPIO_Pin_0;
      GPIO_InitStructure.GPIO_Mode=GPIO_Mode_IN_FLOATING;
      GPIO_Init(GPIOG,&GPIO_InitStructure);

      /*ConfigurePC13asinputfloating(EXTILine13)*/
      GPIO_InitStructure.GPIO_Pin=GPIO_Pin_1;
      GPIO_InitStructure.GPIO_Mode=GPIO_Mode_IN_FLOATING;
      GPIO_Init(GPIOG,&GPIO_InitStructure);

      /*ConfigurePC13asinputfloating(EXTILine13)*/
      GPIO_InitStructure.GPIO_Pin=GPIO_Pin_2;
      GPIO_InitStructure.GPIO_Mode=GPIO_Mode_IN_FLOATING;
      GPIO_Init(GPIOG,&GPIO_InitStructure);

      /*ConfigurePC13asinputfloating(EXTILine13)*/
      GPIO_InitStructure.GPIO_Pin=GPIO_Pin_3;
      GPIO_InitStructure.GPIO_Mode=GPIO_Mode_IN_FLOATING;
      GPIO_Init(GPIOG,&GPIO_InitStructure);

      /*ConfigurePC13asinputfloating(EXTILine13)*/
      GPIO_InitStructure.GPIO_Pin=GPIO_Pin_4;
      GPIO_InitStructure.GPIO_Mode=GPIO_Mode_IN_FLOATING;
      GPIO_Init(GPIOG,&GPIO_InitStructure);

      /*ConfigurePC13asinputfloating(EXTILine13)*/
      GPIO_InitStructure.GPIO_Pin=GPIO_Pin_5;
      GPIO_InitStructure.GPIO_Mode=GPIO_Mode_IN_FLOATING;
      GPIO_Init(GPIOG,&GPIO_InitStructure);

}
void EXTI_Configure(void)
{
      EXTI_InitTypeDef EXTI_InitStructure;

      GPIO_EXTILineConfig(GPIO_PortSourceGPIOG,GPIO_PinSource0);
      EXTI_InitStructure.EXTI_Line=EXTI_Line0;
      EXTI_InitStructure.EXTI_Mode=EXTI_Mode_Interrupt;
      EXTI_InitStructure.EXTI_Trigger=EXTI_Trigger_Rising;
      EXTI_InitStructure.EXTI_LineCmd=ENABLE;
      EXTI_Init(&EXTI_InitStructure);

      GPIO_EXTILineConfig(GPIO_PortSourceGPIOG,GPIO_PinSource1);
      EXTI_InitStructure.EXTI_Line=EXTI_Line1;
      EXTI_InitStructure.EXTI_Mode=EXTI_Mode_Interrupt;
      EXTI_InitStructure.EXTI_Trigger=EXTI_Trigger_Rising;
      EXTI_InitStructure.EXTI_LineCmd=ENABLE;
      EXTI_Init(&EXTI_InitStructure);

      GPIO_EXTILineConfig(GPIO_PortSourceGPIOG,GPIO_PinSource2);
      EXTI_InitStructure.EXTI_Line=EXTI_Line2;
      EXTI_InitStructure.EXTI_Mode=EXTI_Mode_Interrupt;
      EXTI_InitStructure.EXTI_Trigger=EXTI_Trigger_Rising;
      EXTI_InitStructure.EXTI_LineCmd=ENABLE;
      EXTI_Init(&EXTI_InitStructure);

      GPIO_EXTILineConfig(GPIO_PortSourceGPIOG,GPIO_PinSource3);
      EXTI_InitStructure.EXTI_Line=EXTI_Line3;
      EXTI_InitStructure.EXTI_Mode=EXTI_Mode_Interrupt;
      EXTI_InitStructure.EXTI_Trigger=EXTI_Trigger_Rising;
      EXTI_InitStructure.EXTI_LineCmd=ENABLE;
      EXTI_Init(&EXTI_InitStructure);

      GPIO_EXTILineConfig(GPIO_PortSourceGPIOG,GPIO_PinSource4);
      EXTI_InitStructure.EXTI_Line=EXTI_Line4;
      EXTI_InitStructure.EXTI_Mode=EXTI_Mode_Interrupt;
      EXTI_InitStructure.EXTI_Trigger=EXTI_Trigger_Rising;
      EXTI_InitStructure.EXTI_LineCmd=ENABLE;
      EXTI_Init(&EXTI_InitStructure);

      GPIO_EXTILineConfig(GPIO_PortSourceGPIOG,GPIO_PinSource5);
      EXTI_InitStructure.EXTI_Line=EXTI_Line5;
      EXTI_InitStructure.EXTI_Mode=EXTI_Mode_Interrupt;
      EXTI_InitStructure.EXTI_Trigger=EXTI_Trigger_Rising;
      EXTI_InitStructure.EXTI_LineCmd=ENABLE;
      EXTI_Init(&EXTI_InitStructure);
}
void EXTI_SETUP(void)
{
      EXTI_Clock();
      EXTI_SetupNVIC();
      EXTI_SetupGPIO();
      EXTI_Configure();
}

2万 · 2016-10-30 18:40

可能板子画的不好，有互相干扰吧；

2万 · 2016-10-30 18:42

我也遇到过同样的问题，不过我没有外拉的电阻

1万 · 2016-10-30 18:44

硬件问题的可能性比较大，我的一点干扰都没有

1万 · 2016-10-30 18:45

先检测一下硬件电路，看看有没有问题

1万 · 2016-10-30 18:47

1.硬件上面，外部接了5K的上拉电阻。
2.软件上面设置成上拉

EXTI_InitStructure.EXTI_Trigger=EXTI_Trigger_Rising; 上升沿响应
这样设定，应该一直响应！

1万 · 2016-10-30 18:49

如果觉得软件设置的没有问题，那就怀疑硬件的确产生中断了，可以用示波器量一下那些管脚

1万 · 2016-10-30 18:52

为什么是一直相应？

1万 · 2016-10-30 18:53

上升沿和高电平不是一回是吧？没用过STM32

1万 · 2016-10-30 18:55

我遇到过类似情况，当时GPIO设置的是上拉输入，我测了一下管脚一直是高电平。

1万 · 2016-10-30 18:58

然后呢？你是怎么应对这个的呢

1万 · 2016-10-30 19:01

后将GPIO设置为下拉输入。硬件上io管脚啥也没接。结果OK了。

1万 · 2016-10-30 19:04

还是没有解决这个问题啊我用示波器观察了输入引脚电平没有变化

1万 · 2016-10-30 19:06

上升沿和高电平当然不一样了