AT32F421C8T7外部中断问题

只看该作者 · 2021-1-21 21:24

程序将PB2引脚作为外部中断引脚，程序配置之后，引脚上电平变化时程序不能进入中断处理函数。以下为代码，请各位帮忙看看是否有配置不对的地方。
void check_gpio_init(void)
{
GPIO_InitType GPIO_InitStructure;
EXTI_InitType EXTI_InitStructure;
NVIC_InitType NVIC_InitStructure;

RCC_AHBPeriphClockCmd(RCC_AHBPERIPH_GPIOB,ENABLE);

GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN;
GPIO_InitStructure.GPIO_Pull = GPIO_Pull_NOPULL;
GPIO_InitStructure.GPIO_MaxSpeed = GPIO_MaxSpeed_50MHz;
GPIO_InitStructure.GPIO_OutType = GPIO_OutType_PP;

GPIO_InitStructure.GPIO_Pins = GPIO_Pins_2;
GPIO_Init(GPIOB,&GPIO_InitStructure);

SYSCFG_EXTILineConfig(EXTI_PortSourceGPIOB,EXTI_PinSource2);

EXTI_InitStructure.EXTI_Line = EXTI_Line2;
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;
EXTI_InitStructure.EXTI_LineEnable = ENABLE;

EXTI_Init(&EXTI_InitStructure);

NVIC_InitStructure.NVIC_IRQChannel = EXTI3_2_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;

NVIC_Init(&NVIC_InitStructure);
}

void EXTI3_2_IRQHandler(void)
{
if(EXTI_GetIntStatus(EXTI_Line2) != RESET)
{
      if(check_pin_read() == RESET)
      {
         irq_count++;
         if(irq_count >= 20)
         {
            fault_status = 0;
            irq_count = 0;
            //device_check_en(DISABLE);
         }
}

EXTI_ClearIntPendingBit(EXTI_Line2);
}
}

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只看该作者 · 2021-1-21 22:35

本帖最后由 muyichuan2012 于 2021-1-22 13:44 编辑

直接跑bsp中exti example试试。

AT32F421C8T7外部中断问题

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