写一个stm32的定时中断代码
时间: 2023-12-07 14:05:28 浏览: 25
好的,以下是一个简单的STM32定时器中断的示例代码:
```C
#include "stm32f4xx.h"
void TIM2_IRQHandler(void) {
if (TIM_GetITStatus(TIM2, TIM_IT_Update) != RESET) {
// 处理定时器中断
// ...
TIM_ClearITPendingBit(TIM2, TIM_IT_Update);
}
}
int main(void) {
// 初始化时钟和定时器2
// ...
// 配置定时器2为定时中断模式
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
TIM_TimeBaseStructInit(&TIM_TimeBaseStructure);
TIM_TimeBaseStructure.TIM_Period = 499;
TIM_TimeBaseStructure.TIM_Prescaler = 8399;
TIM_TimeBaseStructure.TIM_ClockDivision = 0;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);
// 配置定时器2中断
NVIC_InitTypeDef NVIC_InitStructure;
NVIC_InitStructure.NVIC_IRQChannel = TIM2_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
TIM_ITConfig(TIM2, TIM_IT_Update, ENABLE);
// 启动定时器2
TIM_Cmd(TIM2, ENABLE);
while (1) {
// 主循环
// ...
}
}
```
这个代码使用的是STM32F4的定时器2,中断周期为500ms,可以根据实际需要调整定时器的参数。当定时器中断被触发时,处理中断的代码可以放在TIM2_IRQHandler函数中。