STM32F103同时使用4个外部中断，会相互干扰，调了一天未解决，求大神相助！

ADEK1NG · 发表于 2018-10-19 19:14:47

代码如下：

void Ex_Interrupt_Init(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
EXTI_InitTypeDef EXTI_InitStructure;

RCC_APB2PeriphClockCmd( RCC_APB2Periph_GPIOD | RCC_APB2Periph_AFIO ,ENABLE);

GPIO_InitStructure.GPIO_Pin  =GPIO_Pin_0 | GPIO_Pin_1 | GPIO_Pin_2 | GPIO_Pin_3 ;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPD;
GPIO_Init(GPIOD, &GPIO_InitStructure);

EXTI_ClearITPendingBit(EXTI_Line0);
EXTI_InitStructure.EXTI_Line = EXTI_Line0;
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising_Falling;
EXTI_InitStructure.EXTI_LineCmd = ENABLE;
EXTI_Init(&EXTI_InitStructure);
GPIO_EXTILineConfig(GPIO_PortSourceGPIOD,GPIO_PinSource0);

EXTI_ClearITPendingBit(EXTI_Line1);
EXTI_InitStructure.EXTI_Line=EXTI_Line1;
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising_Falling;
EXTI_InitStructure.EXTI_LineCmd = ENABLE;
EXTI_Init(&EXTI_InitStructure);
GPIO_EXTILineConfig(GPIO_PortSourceGPIOD,GPIO_PinSource1);

EXTI_ClearITPendingBit(EXTI_Line2);
EXTI_InitStructure.EXTI_Line= EXTI_Line2;
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising_Falling;
EXTI_InitStructure.EXTI_LineCmd = ENABLE;
EXTI_Init(&EXTI_InitStructure);
EXTI_GenerateSWInterrupt(EXTI_Line2);
GPIO_EXTILineConfig(GPIO_PortSourceGPIOD,GPIO_PinSource2);

EXTI_ClearITPendingBit(EXTI_Line3);
EXTI_InitStructure.EXTI_Line = EXTI_Line3;
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising_Falling;
EXTI_InitStructure.EXTI_LineCmd = ENABLE;
EXTI_Init(&EXTI_InitStructure);
EXTI_GenerateSWInterrupt(EXTI_Line3);
GPIO_EXTILineConfig(GPIO_PortSourceGPIOD,GPIO_PinSource3);
}

void NVIC_Config()
{
   NVIC_InitTypeDef NVIC_InitStructure;
   NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);

   NVIC_InitStructure.NVIC_IRQChannel = EXTI0_IRQn ;
   NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
   NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
   NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
   NVIC_Init(&NVIC_InitStructure);

   NVIC_InitStructure.NVIC_IRQChannel = EXTI1_IRQn;
   NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
   NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
   NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
   NVIC_Init(&NVIC_InitStructure);

   NVIC_InitStructure.NVIC_IRQChannel = EXTI2_IRQn;
   NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
   NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
   NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
   NVIC_Init(&NVIC_InitStructure);

   NVIC_InitStructure.NVIC_IRQChannel = EXTI3_IRQn;
   NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
   NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
   NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
   NVIC_Init(&NVIC_InitStructure);
  }

void EXTI0_IRQHandler(void)
{
if(EXTI_GetITStatus(EXTI_Line0)!=RESET)
{
if(GPIO_ReadInputDataBit(GPIOD,GPIO_Pin_0))
{
TIM_Cmd(TIM2,DISABLE);
up_inter = 1;
}
else
{
up_inter = 0;
}
}
EXTI_ClearITPendingBit(EXTI_Line0);
}

void EXTI1_IRQHandler(void)
{
if(EXTI_GetITStatus(EXTI_Line1)!=RESET)
{
if(GPIO_ReadInputDataBit(GPIOD,GPIO_Pin_1))
{
TIM_Cmd(TIM2,DISABLE);
down_inter = 1;
}
else
{
down_inter = 0;
}
}
EXTI_ClearITPendingBit(EXTI_Line1);
}

void EXTI2_IRQHandler(void)
{
if(EXTI_GetITStatus(EXTI_Line2)!=RESET)
{
   if(GPIO_ReadInputDataBit(GPIOD,GPIO_Pin_2))
{
TIM_Cmd(TIM4,DISABLE);
left_inter = 1;
}
else
{
left_inter = 0;
}
}
EXTI_ClearITPendingBit(EXTI_Line2);
}

void EXTI3_IRQHandler(void)
{
if(EXTI_GetITStatus(EXTI_Line3)!=RESET)
{
if(GPIO_ReadInputDataBit(GPIOD,GPIO_Pin_3))
{
TIM_Cmd(TIM4,DISABLE);
right_inter = 1;
}
else
{
right_inter = 0;
}
}
EXTI_ClearITPendingBit(EXTI_Line3);
}

QQ图片20181019111154.jpg