3.NVIC_IRQChannelSubPriority:响应优先级(最大取值15) 4.NVIC_IRQChannelCmd:(ENABLE/DISABLE) 使能/失能对应的中断通道 GPIO的外部中断触发方式为高电平触发上升沿触发,上升沿触发一个中断交由EXTI中断控制器进行管理,再往上给到nvic,你想由cpu响应中断,首先由nvic管理,nvic给没个中断一个管理开关,没有nvic的管理...
例如：STM32外部中断0配置如下 EXTI_NVIC_InitStructure.NVIC_IRQChannel = EXTI0_IRQn;EXTI_NVIC_...
FunctionalState NVIC_IRQChannelCmd; } NVIC_InitTypeDef; 例如:STM32外部中断0配置如下 EXTI_NVIC_InitStructure.NVIC_IRQChannel = EXTI0_IRQn; EXTI_NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1; //抢占优先级别(0~1) EXTI_NVIC_InitStructure.NVIC_IRQChannelSubPriority = 7; //响应优先级别(0~7)...
NVIC_InitStructure.NVIC_IRQChannel = EXTI0_IRQn; //使能按键WK_UP所在的外部中断通道 NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x02; //抢占优先级2, NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x03; //子优先级3 NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //使能外部中断通道 NVIC_...
uint8_t NVIC_IRQChannelSubPriority; //响应优先级 FunctionalState NVIC_IRQChannelCmd; } NVIC_InitTypeDef; 例如:STM32外部中断0配置如下 EXTI_NVIC_InitStructure.NVIC_IRQChannel = EXTI0_IRQn; EXTI_NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1; //抢占优先级别(0~1) ...
NVIC_IRQChannel用以使能或者失能指定的IRQ通道,可取值有: WWDG_IRQn 窗口看门狗中断 PVD_IRQn PVD通过EXTI探测中断 TAMPER_IRQn 篡改中断 RTC_IRQn RTC全局中断 Flashf_IRQn FLASH全局中断 RCC_IRQn RCC全局中断 EXTI0_IRQn 外部中断线0中断 EXTI1_IRQn 外部中断线1中断 ...
typedefstruct{uint8_tNVIC_IRQChannel;//中断源uint8_tNVIC_IRQChannelPreemptionPriority;//抢占优先级uint8_tNVIC_IRQChannelSubPriority;//响应优先级FunctionalState NVIC_IRQChannelCmd;//是否使能} NVIC_InitTypeDef; 针对每个中断,设置对应的抢占优先级和响应优先级,下面以中断源为 "USART2_IRQn",抢占优先级为1,...
NVIC_EXTI_LINE0_InitStruct.NVIC_IRQChannelSubPriority=1;//子优先级 NVIC_Init(&NVIC_EXTI_LINE0_InitStruct);//结构体初始化 //同上 line9-5 和line10-15是共用中断源的中断服务函数的,可以用中断标志位去判断,服务函数在startup文件中 NVIC_EXTI_LINE13_InitStruct.NVIC_IRQChannel=EXTI15_10_IRQn; ...
(NVIC_PriorityGroup_1);//选择需要初始化的中断 为 EXTI0NVIC_InitStructure.NVIC_IRQChannel=EXTI0_IRQn;//将抢断优先级设置为 1NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=1;//将子优先级设置为 1NVIC_InitStructure.NVIC_IRQChannelSubPriority=1;//使能NVIC_InitStructure.NVIC_IRQChannelCmd=ENABLE;NVIC_...
EXTI线18连接到USB唤醒事件 EXTI线19连接到以太网唤醒事件(只适用于互联型产品)。 其中,每个外部中断都具有对应的硬件机制,如下图: STM32中,每一个GPIO都可以触发一个外部中断,但是,GPIO的中断是以组位一个单位的,同组间的外部中断同一时间只能使用一个。比如说,PA0,PB0,PC0,PD0,PE0,PF0,PG0这些为1组,...