STM32F407 中断的代码
时间: 2024-05-02 11:04:14 浏览: 10
以下是一个简单的基于STM32F407的中断处理函数的代码示例,其中包括了外部中断、定时器中断、USART中断等:
```c
#include "stm32f4xx.h"
void EXTI0_IRQHandler(void) {
if(EXTI_GetITStatus(EXTI_Line0) != RESET) {
// 处理外部中断事件
EXTI_ClearITPendingBit(EXTI_Line0);
}
}
void TIM2_IRQHandler(void) {
if(TIM_GetITStatus(TIM2, TIM_IT_Update) != RESET) {
// 处理定时器中断事件
TIM_ClearITPendingBit(TIM2, TIM_IT_Update);
}
}
void USART1_IRQHandler(void) {
if(USART_GetITStatus(USART1, USART_IT_RXNE) != RESET) {
// 处理USART接收中断事件
USART_ClearITPendingBit(USART1, USART_IT_RXNE);
}
}
int main(void) {
// 初始化代码
// ...
// 配置外部中断
EXTI_InitTypeDef EXTI_InitStructure;
EXTI_InitStructure.EXTI_Line = EXTI_Line0;
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising;
EXTI_InitStructure.EXTI_LineCmd = ENABLE;
EXTI_Init(&EXTI_InitStructure);
// 配置定时器中断
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
TIM_TimeBaseStructure.TIM_Period = 1000;
TIM_TimeBaseStructure.TIM_Prescaler = 8400;
TIM_TimeBaseStructure.TIM_ClockDivision = 0;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);
TIM_ITConfig(TIM2, TIM_IT_Update, ENABLE);
// 配置USART中断
USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);
// 启用中断
NVIC_InitTypeDef NVIC_InitStructure;
NVIC_InitStructure.NVIC_IRQChannel = EXTI0_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x00;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x00;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
NVIC_InitStructure.NVIC_IRQChannel = TIM2_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x01;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x00;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x02;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x00;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
while(1) {
// 主循环代码
// ...
}
}
```