求教：stm32F030 定时器怎么进不来中断？

只看该作者 · 2014-3-22 15:21

本帖最后由 sisyphos 于 2014-3-22 15:32 编辑

定时器1 channel4，采用输入捕获模式
初始化如下：
void Tim1Init(void)
{
//端口PA11初始化
      RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA,ENABLE);             //使能PA端口时钟

      GPIO_InitTypeDef GPIO_InitStruct;
      GPIO_InitStruct.GPIO_Pin = SIGNAL_CAPTURE_PIN;
      GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz;
      GPIO_InitStruct.GPIO_Mode = GPIO_Mode_IN;             //悬空输入
      GPIO_InitStruct.GPIO_PuPd = GPIO_PuPd_NOPULL;
      GPIO_Init(SIGNAL_CAPTURE_PORT,&GPIO_InitStruct);

      //Tim1,AF功能配置
      GPIO_PinAFConfig(SIGNAL_CAPTURE_PORT,SIGNAL_CAPTURE_PIN,GPIO_AF_2);

//Tim1初始化
      RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1, ENABLE);                // 使能时钟单元
      TIM_PrescalerConfig(TIM1, TIM1_CLK_DIV_NUM, TIM_PSCReloadMode_Immediate);
      TIM_SetAutoreload(TIM1, TIM1_WORK_RELOAD_NUM);                                     //

      TIM_ICInitTypeDef TIM1_ICInitStruct;

      TIM1_ICInitStruct.TIM_Channel = TIM_Channel_4;
      TIM1_ICInitStruct.TIM_ICPolarity = TIM_ICPolarity_Rising;
      TIM1_ICInitStruct.TIM_ICSelection = TIM_ICSelection_DirectTI;
      TIM1_ICInitStruct.TIM_ICPrescaler = TIM_ICPSC_DIV1;
      TIM1_ICInitStruct.TIM_ICFilter = 0x0;

      TIM_ICInit(TIM1,&TIM1_ICInitStruct);

      TIM1->SR = 0;
      TIM_ITConfig(TIM1, TIM_IT_CC4, ENABLE);
      TIM_Cmd(TIM1, ENABLE);                      //使能定时器

}

void TIM1_CC_IRQHandler(void)
{
      INT32 tempccr = 0;
      INT32 capturedata = 0;
      INT32 err;

      if (TIM_GetITStatus(TIM1,TIM_IT_CC4))
      {
            TIM_ClearFlag(TIM1, TIM_IT_CC4);

            tempccr = TIM_GetCapture4(TIM1);             //获取当前捕获的计数值
      }
}
static void _system_IntSet(void)
{
  __set_PRIMASK(1);//关中断

  NVIC_InitTypeDef NVIC_InitStructure;

  NVIC_InitStructure.NVIC_IRQChannel =  TIM1_CC_IRQn;  //TIM1_BRK_UP_TRG_COM_IRQn，  TIM1_CC_IRQn
  NVIC_InitStructure.NVIC_IRQChannelPriority = 1;
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
  NVIC_Init(&NVIC_InitStructure);
}