STM32F103C8T6如何使用2个定时中断
时间: 2024-05-02 21:16:36 浏览: 8
STM32F103C8T6可以使用2个定时中断,可以通过以下步骤实现:
1. 配置TIM2和TIM3定时器:
```
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2 | RCC_APB1Periph_TIM3, ENABLE);
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
TIM_TimeBaseStructure.TIM_Period = 1000; // 定时器周期为1ms
TIM_TimeBaseStructure.TIM_Prescaler = 72 - 1; // 定时器时钟频率为72MHz,分频为72
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;
TIM_TimeBaseStructure.TIM_RepetitionCounter = 0;
TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);
TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure);
```
2. 配置TIM2和TIM3定时器中断:
```
NVIC_InitTypeDef NVIC_InitStructure;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_InitStructure.NVIC_IRQChannel = TIM2_IRQn;
NVIC_Init(&NVIC_InitStructure);
NVIC_InitStructure.NVIC_IRQChannel = TIM3_IRQn;
NVIC_Init(&NVIC_InitStructure);
TIM_ITConfig(TIM2, TIM_IT_Update, ENABLE);
TIM_ITConfig(TIM3, TIM_IT_Update, ENABLE);
```
3. 实现TIM2和TIM3中断处理函数:
```
void TIM2_IRQHandler(void)
{
if (TIM_GetITStatus(TIM2, TIM_IT_Update) != RESET)
{
// 处理定时器2中断事件
TIM_ClearITPendingBit(TIM2, TIM_IT_Update);
}
}
void TIM3_IRQHandler(void)
{
if (TIM_GetITStatus(TIM3, TIM_IT_Update) != RESET)
{
// 处理定时器3中断事件
TIM_ClearITPendingBit(TIM3, TIM_IT_Update);
}
}
```
4. 启动定时器:
```
TIM_Cmd(TIM2, ENABLE);
TIM_Cmd(TIM3, ENABLE);
```
这样就可以使用2个定时中断了。在TIM2_IRQHandler和TIM3_IRQHandler函数中编写相应的中断处理代码即可。