stm32定时计数器4的.c和.h
时间: 2024-02-26 17:58:37 浏览: 17
下面是使用定时计数器4的.h和.c文件的示例:
timer4.h
```c
#ifndef TIMER4_H
#define TIMER4_H
#include "stm32f4xx.h"
void TIM4_Init(void);
void TIM4_IRQHandler(void);
#endif /* TIMER4_H */
```
timer4.c
```c
#include "timer4.h"
void TIM4_Init(void)
{
TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStruct;
NVIC_InitTypeDef NVIC_InitStruct;
/* Enable clock for TIM4 */
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM4, ENABLE);
/* TIM4 configuration */
TIM_TimeBaseInitStruct.TIM_Prescaler = 42000 - 1; // 84MHz / 42000 = 2kHz
TIM_TimeBaseInitStruct.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInitStruct.TIM_Period = 2000 - 1; // 2kHz / 2000 = 1Hz
TIM_TimeBaseInitStruct.TIM_ClockDivision = TIM_CKD_DIV1;
TIM_TimeBaseInitStruct.TIM_RepetitionCounter = 0;
TIM_TimeBaseInit(TIM4, &TIM_TimeBaseInitStruct);
/* Enable interrupt */
TIM_ITConfig(TIM4, TIM_IT_Update, ENABLE);
/* Enable TIM4 */
TIM_Cmd(TIM4, ENABLE);
/* Configure NVIC */
NVIC_InitStruct.NVIC_IRQChannel = TIM4_IRQn;
NVIC_InitStruct.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStruct.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStruct.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStruct);
}
void TIM4_IRQHandler(void)
{
if (TIM_GetITStatus(TIM4, TIM_IT_Update) != RESET)
{
/* Clear interrupt flag */
TIM_ClearITPendingBit(TIM4, TIM_IT_Update);
/* Do something */
// ...
}
}
```
在主函数中调用 TIM4_Init() 函数以初始化定时计数器4,并在 TIM4_IRQHandler() 函数中处理定时器中断。