GD32的输入捕获配置

2万 · 2019-12-18 19:54

输入捕获配置：
void TIM3_Cap_Init(uint16_t arr ,uint16_t psc)
{

      RCC_AHBPeriphClock_Enable( RCC_AHBPERIPH_GPIOC, ENABLE );
      RCC_APB1PeriphClock_Enable( RCC_APB1PERIPH_TIMER3,ENABLE );
      {
      GPIO_InitPara GPIO_InitStructure;

      GPIO_InitStructure.GPIO_Pin    = GPIO_PIN_6 ;
      GPIO_InitStructure.GPIO_Mode = GPIO_MODE_AF;
      GPIO_InitStructure.GPIO_OType = GPIO_OTYPE_PP;
      GPIO_InitStructure.GPIO_PuPd = GPIO_PUPD_NOPULL;
      GPIO_InitStructure.GPIO_Speed = GPIO_SPEED_50MHZ;
      GPIO_Init( GPIOC , &GPIO_InitStructure );
  }
      {
      NVIC_InitPara NVIC_InitStructure;

  NVIC_InitStructure.NVIC_IRQ                = TIMER3_IRQn;//
      NVIC_InitStructure.NVIC_IRQPreemptPriority = 0;//
      NVIC_InitStructure.NVIC_IRQSubPriority    = 1;//                ¨
      NVIC_InitStructure.NVIC_IRQEnable          = ENABLE;//
      NVIC_Init( &NVIC_InitStructure );//
  }

      {
      TIMER_BaseInitPara TIM_TimeBaseStructure;
      TIMER_ICInitPara TIM_ICInitStructure;

      TIMER_DeInit( TIMER3 );

      TIM_TimeBaseStructure.TIMER_Period = arr ;
      TIM_TimeBaseStructure.TIMER_Prescaler = psc ;
      TIM_TimeBaseStructure.TIMER_ClockDivision = TIMER_CDIV_DIV1;
      TIM_TimeBaseStructure.TIMER_CounterMode = TIMER_COUNTER_UP;
      TIMER_BaseInit(TIMER3, &TIM_TimeBaseStructure);

      TIMER_PrescalerConfig( TIMER3, 71, 1 );

      TIM_ICInitStructure.TIMER_CH       = TIMER_CH_1;
      TIM_ICInitStructure.TIMER_ICPolarity  = TIMER_IC_POLARITY_FALLING;
      TIM_ICInitStructure.TIMER_ICSelection = TIMER_IC_SELECTION_DIRECTTI;
      TIM_ICInitStructure.TIMER_ICPrescaler = TIMER_IC_PSC_DIV1;
      TIM_ICInitStructure.TIMER_ICFilter = 0X00;
      TIMER_ICStructInit(&TIM_ICInitStructure);

      TIMER_PWMCaptureConfig(TIMER3, &TIM_ICInitStructure);
  }
      TIMER_SelectInputTrigger(TIMER3 ,TIMER_TS_TI1FP1);//ke gai
      TIMER_SelectSlaveMode(TIMER3 ,TIMER_SLAVE_MODE_RESET);
      TIMER_UpdateRequestConfig(TIMER3 ,TIMER_UPDATE_SRC_REGULAR );
      TIMER3->CARL = arr;
      //TIMER_SelectMasterSlaveMode(TIMER2 ,TIMER_MASTER_SLAVE_MODE_ENABLE);
      TIMER_ClearBitState(TIMER3, TIMER_FLAG_UPDATE | TIMER_FLAG_CH1 | TIMER_FLAG_CH2 );

      TIMER_INTConfig(TIMER3, TIMER_INT_CH2, ENABLE);

      TIMER_INTConfig(TIMER3, TIMER_INT_CH1, ENABLE);

      TIMER_Enable(TIMER3, ENABLE);
}

中断服务函数：
void TIM3_IRQHandler(void)
{
if((TIMER_GetBitState(TIMER3, TIMER_FLAG_CH2 ) != RESET))
      {
               TIMER_ClearBitState(TIMER3, TIMER_FLAG_CH2 );
               ICValue2 = TIMER3->CHCC2;
}
      if((TIMER_GetBitState(TIMER3, TIMER_FLAG_CH1) != RESET))
      {
               TIMER_ClearBitState(TIMER3, TIMER_FLAG_CH1);
               ICValue1 = TIMER3->CHCC1 - TIMER3->CHCC2;
}
}
在线仿真时寄存器里面没有值，没有产生输入捕获，不知道问题出在哪里，求高手指点问题出在哪里

2万 · 2019-12-18 19:58

配置的问题？

2万 · 2019-12-18 20:04

定时器的相关传感器的配置的很重要

1万 · 2019-12-18 20:07

这个要把相关的寄存器的配置合适的

1万 · 2019-12-18 20:10

这个方面的还没仔细研究的

1万 · 2019-12-18 20:13

那请问不是配置的问题是哪里的问题呢？我正好写到这块，仿真出来看到中断服务函数是进去了，可是寄存器里没有值，是哪里的问题呢？