新手,求教MM32F0010 两个外部中断可以设置成同一中断函数吗？

只看该作者 · 2022-2-22 19:21

本帖最后由打小就不错于 2022-2-22 19:35 编辑

RT.
我试过将两个中断，设置成两个中断处理函数，是正常的，两个端口产生中断有先后顺序（先后的时间没评估过，在1ms内或者更小吧）。
先说问题，当我将两个外部中断设置成同一个中断处理函数时，似乎有点不正常：当进入中断时，判断中断SR寄存器，两个中断口的中断状态都读到信息了【这样我就没办法判断，两个中断产生的先后顺序了】。
RCC_AHBPeriphClockCmd(RCC_AHBENR_GPIOA, ENABLE);
GPIO_StructInit(&GPIO_InitStructure);

GPIO_InitStructure.GPIO_Pin  = GPIO_Pin_2;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_FLOATING;
GPIO_Init(GPIOA, &GPIO_InitStructure);

      GPIO_InitStructure.GPIO_Pin  = GPIO_Pin_15;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_FLOATING;
GPIO_Init(GPIOA, &GPIO_InitStructure);

//PA.2 use EXTI line 2
SYSCFG_EXTILineConfig(EXTI_PortSourceGPIOA, EXTI_PinSource2);
EXTI_InitStructure.EXTI_Line = EXTI_Line2;
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising_Falling;//EXTI_Trigger_Falling;
EXTI_InitStructure.EXTI_LineCmd = ENABLE;
EXTI_Init(&EXTI_InitStructure);
      NVIC_InitStructure.NVIC_IRQChannel = EXTI2_3_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPriority = 0x01;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);

      //PA.15 use EXTI line 15
SYSCFG_EXTILineConfig(EXTI_PortSourceGPIOA, EXTI_PinSource15);
EXTI_InitStructure.EXTI_Line = EXTI_Line15;
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising_Falling;//EXTI_Trigger_Falling;
EXTI_InitStructure.EXTI_LineCmd = ENABLE;
EXTI_Init(&EXTI_InitStructure);
NVIC_InitStructure.NVIC_IRQChannel = EXTI2_3_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPriority = 0x01;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);

void EXTI2_3_IRQHandler(void)
{
            if((EXTI_GetITStatus(EXTI_Line2) != RESET) && (EXTI_GetITStatus(EXTI_Line15) != RESET))
            {
                              printf("EXTI2_3_IRQHandler Pin Error\n");
            }       EXTI_ClearFlag(EXTI_Line15);
EXTI_ClearFlag(EXTI_Line2);
}

刚学，求大神指点。