想要定时1s，填写下面的程序段 void TIM2_Configuration() { TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure; TIM_TimeBaseStructure.TIM_Period = （）; TIM_TimeBaseStructure.TIM_Prescaler = 3600-1; TIM_TimeBaseStructure.TIM_ClockDivision = 0x0; TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode（）; TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure); TIM_ClearFlag(TIM2,()); //清除更新标志 TIM_ITConfig(TIM2,(),()); //开中断 TIM_Cmd(TIM2,()); //使能定时器2 }

To configure TIM2 to run with a 1s period, you can set the TIM_TimeBaseStructure.TIM_Period value to 1000-1, since the period is in milliseconds and the timer runs at a clock frequency of 72MHz with a prescaler value of 3600-1.

Here's the complete code snippet:

void TIM2_Configuration() {
  TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
  TIM_TimeBaseStructure.TIM_Period = 1000-1;
  TIM_TimeBaseStructure.TIM_Prescaler = 3600-1;
  TIM_TimeBaseStructure.TIM_ClockDivision = 0x0;
  TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
  TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);
  TIM_Cmd(TIM2, ENABLE);
}

Note that the TIM_CounterMode_Up parameter is used to configure the timer in the up-counting mode. Also, the TIM_Cmd(TIM2, ENABLE) command is used to enable the timer.