標題: 外部中斷計數(shù)器 [打印本頁]
作者: lmalma    時間: 2023-2-9 16:05
標題: 外部中斷計數(shù)器
void CountSensor_Init(void)//外部中斷函數(shù)
{
        RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);
        RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE);
       
        GPIO_InitTypeDef GPIO_InitStructure;
        GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
        GPIO_InitStructure.GPIO_Pin = GPIO_Pin_14;
        GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
        GPIO_Init(GPIOB, &GPIO_InitStructure);
       
        GPIO_EXTILineConfig(GPIO_PortSourceGPIOB, GPIO_PinSource14);
       
        EXTI_InitTypeDef EXTI_InitStructure;
        EXTI_InitStructure.EXTI_Line = EXTI_Line14;
        EXTI_InitStructure.EXTI_LineCmd = ENABLE;
        EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
        EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;
        EXTI_Init(&EXTI_InitStructure);
       
        NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
       
        NVIC_InitTypeDef NVIC_InitStructure;
        NVIC_InitStructure.NVIC_IRQChannel = EXTI15_10_IRQn;
        NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
        NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
        NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
        NVIC_Init(&NVIC_InitStructure);
}

uint16_t CountSensor_Get(void)
{
        return CountSensor_Count;
}

void EXTI15_10_IRQHandler(void)
{
        if (EXTI_GetITStatus(EXTI_Line14) == SET)
        {
                /*如果出現(xiàn)數(shù)據(jù)亂跳的現(xiàn)象，可再次判斷引腳電平，以避免抖動*/
                if (GPIO_ReadInputDataBit(GPIOB, GPIO_Pin_14) == 0)
                {
                        CountSensor_Count ++;
                }
                EXTI_ClearITPendingBit(EXTI_Line14);
        }
}





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