STM32f407编码器计数器一直是0和1

wxblack · 发表于 2018-8-18 15:09:44

GPIO_InitTypeDef GPIO_InitStructure;
      TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
      TIM_OCInitTypeDef  TIM_OCInitStructure;
      TIM_ICInitTypeDef       TIM_ICInitStructure;

      RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM5, ENABLE);
      RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE);

      GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1;
      GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
      GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
      GPIO_InitStructure.GPIO_OType = GPIO_OType_OD;
      GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
      GPIO_Init(GPIOA, &GPIO_InitStructure);

      GPIO_PinAFConfig(GPIOA,GPIO_PinSource0,GPIO_AF_TIM5);
      GPIO_PinAFConfig(GPIOA,GPIO_PinSource1,GPIO_AF_TIM5);

      TIM_TimeBaseStructInit(&TIM_TimeBaseStructure);

      TIM_TimeBaseStructure.TIM_Prescaler = 0x0; // No prescaling
      TIM_TimeBaseStructure.TIM_Period = 60000;
      TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;
      TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
      TIM_TimeBaseInit(TIM5, &TIM_TimeBaseStructure);

      TIM_EncoderInterfaceConfig(TIM5, TIM_EncoderMode_TI1, TIM_ICPolarity_Rising, TIM_ICPolarity_Rising);
      TIM_ICStructInit(&TIM_ICInitStructure);
      TIM_ICInitStructure.TIM_ICFilter = 0;
      TIM_ICInit(TIM5, &TIM_ICInitStructure);

      TIM_ClearFlag(TIM5, TIM_FLAG_Update);
      TIM_ITConfig(TIM5, TIM_IT_Update, ENABLE);

      TIM_Cmd(TIM5, ENABLE);

这是之前用的程序然后昨天晚上用TIM_GetCounter读取计数的时候一直是0 1变化  麻烦大家帮我看下哪里有问题了