stm32F103定时器2定时10s

可以使用以下代码实现：

#include "stm32f10x.h"

void TIM2_IRQHandler(void)
{
    if (TIM_GetITStatus(TIM2, TIM_IT_Update) != RESET)
    {
        // 定时器2中断处理代码
        // ...

        TIM_ClearITPendingBit(TIM2, TIM_IT_Update);
    }
}

int main(void)
{
    // 初始化定时器2
    RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);

    TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
    TIM_TimeBaseStructure.TIM_Period = 10000 - 1; // 定时10s
    TIM_TimeBaseStructure.TIM_Prescaler = 7200 - 1; // 时钟频率为72MHz，分频7200，得到10kHz的计数频率
    TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;
    TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
    TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);

    // 使能定时器2中断
    NVIC_InitTypeDef NVIC_InitStructure;
    NVIC_InitStructure.NVIC_IRQChannel = TIM2_IRQn;
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init(&NVIC_InitStructure);

    TIM_ITConfig(TIM2, TIM_IT_Update, ENABLE);

    // 启动定时器2
    TIM_Cmd(TIM2, ENABLE);

    while (1)
    {
        // 主循环代码
        // ...
    }
}