NVIC_InitTypeDef NVIC_InitStructure; NVIC_InitStructure.NVIC_IRQChannel = EXTI10_IRQn;//配置为EXTI10线路 NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1; // 抢占优先级 NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1; // 子优先级 NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;//NVIC使能 NVI...
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) EXTI_NVIC_InitStructure.NVIC...
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=9;//指定抢占式优先级别4,可取0-15NVIC_InitStructure.NVIC_IRQChannelSubPriority =0; NVIC_InitStructure.NVIC_IRQChannelCmd=ENABLE; NVIC_Init(&NVIC_InitStructure);/*Configure one bit for preemption priority ---*/NVIC_PriorityGroupConfig(NVIC_PriorityGroup_3...
NVIC_Init(&NVIC_InitStructure);//使能EXTI9_5中断NVIC_InitStructure.NVIC_IRQChannel=EXTI9_5_IRQChannel; NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=0;//指定抢占式优先级别0NVIC_InitStructure.NVIC_IRQChannelSubPriority=1;//指定响应优先级别1NVIC_InitStructure.NVIC_IRQChannelCmd=ENABLE; NVIC_Init(&N...
一、NVIC简单解释 二、抢占优先级与子优先级 三、抢占优先级和子优先级的区分(白话文) 四、NVIC配置分析 在STM32笔记之 EXIT(外部中断)篇章中,已经了解到 EXIT的配置,但是,就像我们刚学 C51的中断一样,中断是有等级区分的,实验中的 STM32在同一时间上,只能执行一个线程(因为是单核,这里稍微带入了点操作系统...
4.配置中断分组(NVIC),并使能中断 5.编写中断服务函数 分享一下中断程序: void EXTIX_Init(void) { GPIO_InitTypeDef GPIO_InitStructure; //定义端口结构初始化 EXTI_InitTypeDef EXTI_InitStructure; //定义中断结构初始化 NVIC_InitTypeDef NVIC_InitStructure; //定义中断优先级结构初始化RCC_APB2PeriphClockCmd(RC...
NVIC_InitStructure.NVIC_IRQSubPriority = 2; NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; NVIC_InitStructure(&NVIC_InitStructure); //定义USART1串口中断的优先级,先占优先级1,从优先级5. NVIC_InitStructure.NVIC_IRQChannel = SUART1_IRQChannel; ...
接下来介绍STM32的中断优先级分组函数NVIC_PriorityGroupConfig(),用来进行中断分组设置的,此函数是在固件库下misc.c文件中(文件目录是: STM32F10x_StdPeriph_Lib_V3.5.0\Libraries\STM32F10x_StdPeriph_Driver\src\misc.c): void NVIC_PriorityGroupConfig(uint32_t NVIC_PriorityGroup) ...
有一点非常重要的是,NVIC_InitTypeDef结构体中的NVIC_IRQChannel是指中断通道,其实就是启动文件中的中断向量表中的中断向量,同时也是中断服务例程的函数名,这三者是同一个意思。理解这一点非常重要,这一点将会在下一篇的AFIO专题中讲到。 NVIC_InitTypeDef NVIC_InitStructure; //配置NVIC_InitTypeDef结构体 ...
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;NVIC_Init(&NVIC_InitStructure);} Usart中：void NVIC_...