用库函数写一个stm32定时器中断
时间: 2023-05-23 20:04:08 浏览: 65
的初始化和配置函数。
可以使用以下代码:
```
void TIM_Configuration(void) {
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
NVIC_InitTypeDef NVIC_InitStructure;
/* TIM3 clock enable */
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE);
/* Time base configuration */
TIM_TimeBaseStructure.TIM_Period = 1000 - 1; // Counter counts to 1000
TIM_TimeBaseStructure.TIM_Prescaler = 16 - 1; // Timer runs at 1 MHz
TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure);
/* TIM3 interrupt enable */
TIM_ITConfig(TIM3, TIM_IT_Update, ENABLE);
/* NVIC configuration */
NVIC_InitStructure.NVIC_IRQChannel = TIM3_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}
```
该函数的作用是初始化和配置一个定时器中断,该定时器中断在每秒钟触发一次。在这个例子中,定时器使用的是 TIM3,运行频率为 1 MHz,计数范围为 0-999。TIM3 的中断被使能,并且配置了 NVIC。