使用STM32F103定时器TIM4例程
时间: 2023-07-30 12:04:54 浏览: 117
当然,下面是一个使用STM32F103定时器TIM4的简单例程:
```c
#include "stm32f10x.h"
void TIM4_IRQHandler(void)
{
if (TIM_GetITStatus(TIM4, TIM_IT_Update) != RESET)
{
// 在这里执行定时器中断的操作
// ...
TIM_ClearITPendingBit(TIM4, TIM_IT_Update); // 清除中断标志位
}
}
void TIM4_Configuration(void)
{
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
NVIC_InitTypeDef NVIC_InitStructure;
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM4, ENABLE); // 使能定时器4时钟
TIM_TimeBaseStructure.TIM_Period = 999; // 设置自动重装载寄存器的值
TIM_TimeBaseStructure.TIM_Prescaler = 7199; // 设置预分频值
TIM_TimeBaseStructure.TIM_ClockDivision = 0;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInit(TIM4, &TIM_TimeBaseStructure);
TIM_ITConfig(TIM4, TIM_IT_Update, ENABLE); // 使能更新中断
NVIC_InitStructure.NVIC_IRQChannel = TIM4_IRQn; // 定时器4中断通道
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0; // 抢占优先级为0
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0; // 子优先级为0
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
TIM_Cmd(TIM4, ENABLE); // 使能定时器4
}
int main(void)
{
TIM4_Configuration();
while (1)
{
// 主循环中的其他操作
// ...
}
}
```
这个例程配置了STM32F103的定时器TIM4,使用了中断方式实现定时功能。你可以根据自己的需求,在`TIM4_IRQHandler`函数中添加定时器中断的操作。同时,你也可以在主循环中添加其他操作。
请注意,以上代码仅供参考,具体的配置和操作需要根据你的实际需求进行调整。
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