背景 网站建设,工程建设承包合同,网站提交入口,舒路视觉的展馆设计案例配置是stm32外部中断步骤#xff1a; 1.使能IO时钟和AFIO时钟 2.配置EXIT中断线 3.配置中断控制器NVIC (EXTI15_10_IRQn,EXTI4_IRQn#xff09; 4.写中断服务子程序 #xff08;EXTI15_10_IRQHandler#xff09; 首先要明白中断IO对应的中断线EXTIx 其中
PA0-PE0对应的是E…配置是stm32外部中断步骤 1.使能IO时钟和AFIO时钟 2.配置EXIT中断线 3.配置中断控制器NVIC (EXTI15_10_IRQn,EXTI4_IRQn 4.写中断服务子程序 EXTI15_10_IRQHandler 首先要明白中断IO对应的中断线EXTIx 其中
PA0-PE0对应的是EXTI0PA4-PE4对应的是EXTI4PA5-PE5对应的是EXTI9_5PA9-PE9对应的是EXTI9_5PA10-PE10对应的是EXTI15_10PA15-PE15对应的是EXTI15_10
例子
GPIO_InitTypeDef GPIO_InitStructur;RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOD|RCC_APB2Periph_AFIO,ENABLE); //使能中断所需AFIO时钟GPIO_InitStructur.GPIO_PinGPIO_Pin_11; GPIO_InitStructur.GPIO_ModeGPIO_Mode_Out_PP;GPIO_InitStructur.GPIO_SpeedGPIO_Speed_50MHz;GPIO_Init(GPIOD,GPIO_InitStructur);GPIO_SetBits(GPIOD,GPIO_Pin_11);GPIO_InitStructur.GPIO_PinGPIO_Pin_10; //中断引脚GPIO_InitStructur.GPIO_ModeGPIO_Mode_IPD;GPIO_InitStructur.GPIO_SpeedGPIO_Speed_50MHz;GPIO_Init(GPIOD,GPIO_InitStructur);EXTI_InitTypeDef EXTI_InitStructure; EXTI_ClearITPendingBit(EXTI_Line10); //清除对应的外部中断线对应标志位GPIO_EXTILineConfig(GPIO_PortSourceGPIOD,GPIO_PinSource10);//中断io配置EXTI_InitStructure.EXTI_Line EXTI_Line10; //根据引脚设定外部中断线EXTI_InitStructure.EXTI_ModeEXTI_Mode_Interrupt; //中断模式EXTI_InitStructure.EXTI_TriggerEXTI_Trigger_Rising;//上升沿EXTI_InitStructure.EXTI_LineCmdENABLE; //中断线使能EXTI_Init(EXTI_InitStructure);NVIC_InitTypeDef NVIC_InitStructure;
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_0); //中断优先级组
NVIC_InitStructure.NVIC_IRQChannel EXTI15_10_IRQn; //中断io对应的通道
NVIC_InitStructure.NVIC_IRQChannelSubPriority 0; //响应优先级
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority 0; //抢占优先级
NVIC_InitStructure.NVIC_IRQChannelCmd ENABLE; //中断通道使能
NVIC_Init(NVIC_InitStructure);
}
void EXTI15_10_IRQHandler() //中断服务程序
{if (EXTI_GetITStatus(EXTI_Line11) ! RESET)EXTI_ClearITPendingBit(EXTI_Line10); //清除中断标志位
}注意在usos中不需要配置NVIC一般只需要用ucos中的两个函数代替
BSP_IntVectSet(BSP_INT_ID_EXTI15_10中断IO对应通道,中断处理函数); BSP_IntEn(BSP_INT_ID_EXTI15_10); //使能对应的中断通道 例如
void KeyIntCfg(void)
{EXTI_InitTypeDef EXTI_InitStruct;GPIO_InitTypeDef GPIO_InitStructure;GPIO_EXTILineConfig(GPIO_PortSourceGPIOE, GPIO_PinSource0);//INTGPIO_InitStructure.GPIO_PinGPIO_Pin_0;GPIO_InitStructure.GPIO_ModeGPIO_Mode_IN_FLOATING;GPIO_Init(GPIOE, GPIO_InitStructure); EXTI_InitStruct.EXTI_Line EXTI_Line0;EXTI_InitStruct.EXTI_Mode EXTI_Mode_Interrupt;EXTI_InitStruct.EXTI_Trigger EXTI_Trigger_Falling;EXTI_InitStruct.EXTI_LineCmd ENABLE;EXTI_Init(EXTI_InitStruct);BSP_IntVectSet(BSP_INT_ID_EXTI0, Key_ISRHandler);BSP_IntEn(BSP_INT_ID_EXTI0);
}void Key_ISRHandler(void)
{OSQPost(Msg_Key_Proc,(void *)(CommonKeyOn));EXTI_ClearITPendingBit(EXTI_Line0);
}
