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stm32tim7定时中断配置

时间: 2023-09-10 21:06:22 浏览: 193

以下是配置STM32 TIM7定时器中断的步骤： 1. 开启TIM7时钟 ```c RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM7, ENABLE); ``` 2. 配置TIM7定时器 ```c TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure; TIM_TimeBaseStructure.TIM_Period = 1000 - 1; // 计数器重载值 TIM_TimeBaseStructure.TIM_Prescaler = 8400 - 1; // 分频系数 TIM_TimeBaseStructure.TIM_ClockDivision = 0; TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; TIM_TimeBaseInit(TIM7, &TIM_TimeBaseStructure); ``` 3. 配置TIM7中断 ```c NVIC_InitTypeDef NVIC_InitStructure; NVIC_InitStructure.NVIC_IRQChannel = TIM7_IRQn; // 定时器7中断通道 NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0; // 抢占优先级 NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0; // 子优先级 NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; // 使能中断 NVIC_Init(&NVIC_InitStructure); TIM_ITConfig(TIM7, TIM_IT_Update, ENABLE); // 使能更新中断 ``` 4. 启动TIM7定时器 ```c TIM_Cmd(TIM7, ENABLE); ``` 5. 编写中断处理函数 ```c void TIM7_IRQHandler(void) { if (TIM_GetITStatus(TIM7, TIM_IT_Update) != RESET) { TIM_ClearITPendingBit(TIM7, TIM_IT_Update); // 清除中断标志位 // 中断处理代码 } } ``` 以上即为配置STM32 TIM7定时中断的基本步骤，具体根据实际需求进行相应修改。

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