求助：为什么在调用了输入捕获的函数只有我的液晶屏不亮了

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roucun|

楼主 | 2018-7-28 17:22 | 只看该作者回帖奖励

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液晶屏, 函数, TI, IO, pi

其中输入捕获的函数是这么写的：
void input_catch(u32 arr,u16 psc){


      GPIO_InitTypeDef GPIO_InitStructure;
      TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
      TIM_ICInitTypeDef TIM_ICInitStructure;
      NVIC_InitTypeDef NVIC_InitStructure;

      //时钟使能
      RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOB,ENABLE);
      RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3,ENABLE);
      //外设声明
      GPIO_PinAFConfig(GPIOB,GPIO_PinSource0,GPIO_AF_TIM3);
      //GPIO初始化
      GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
      GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
      GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;
      GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_DOWN;
      GPIO_InitStructure.GPIO_Speed = GPIO_High_Speed;
      GPIO_Init(GPIOB,&GPIO_InitStructure);
      //定时器基本初始化
      TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;
      TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
      TIM_TimeBaseStructure.TIM_Period = arr;
      TIM_TimeBaseStructure.TIM_Prescaler = psc;
      TIM_TimeBaseInit(TIM3,&TIM_TimeBaseStructure);
      //输入捕获相关设置
      TIM_ICInitStructure.TIM_Channel = TIM_Channel_3;
      TIM_ICInitStructure.TIM_ICFilter = 0;
      TIM_ICInitStructure.TIM_ICPolarity = TIM_ICPolarity_Rising;
      TIM_ICInitStructure.TIM_ICPrescaler = psc;
      TIM_ICInitStructure.TIM_ICSelection = TIM_ICSelection_DirectTI;
      TIM_ICInit(TIM3,&TIM_ICInitStructure);

      TIM_ITConfig(TIM3,TIM_IT_Update|TIM_IT_CC1,ENABLE);//使能定时器以及输入捕获的中断

      TIM_Cmd(TIM3,ENABLE);

      NVIC_InitStructure.NVIC_IRQChannel = TIM3_IRQn;
      NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
      NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 2;
      NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;

      NVIC_Init(&NVIC_InitStructure);
}

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求助：为什么在调用了输入捕获的函数只有我的液晶屏不亮了

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