STM32F407调试0V2640模块，回调函数进不去

15662170758

刚买了原子的OV2640模块和F407的最小系统板，调试摄像头时发现 这个回调一直进不去HAL_DCMI_FrameEventCallback(DCMI_HandleTypeDef *hdcmi)，可能的原因有哪些？什么情况下会调用这个回调函数？

闭月羞花剑

路过留痕，帮顶。

15662170758

原因已找到，行同步和帧同步的触发电平设置错了，回调是在中断HAL_DCMI_IRQHandler(DCMI_HandleTypeDef *hdcmi)里面调用的
/**
  * @brief  Handles DCMI interrupt request.
  * @param  hdcmi pointer to a DCMI_HandleTypeDef structure that contains
  *                the configuration information for the DCMI.
  * @retval None
  */
void HAL_DCMI_IRQHandler(DCMI_HandleTypeDef *hdcmi)
{
  uint32_t isr_value = READ_REG(hdcmi->Instance->MISR);

  /* Synchronization error interrupt management *******************************/
  if((isr_value & DCMI_FLAG_ERRRI) == DCMI_FLAG_ERRRI)
  {
    /* Clear the Synchronization error flag */
    __HAL_DCMI_CLEAR_FLAG(hdcmi, DCMI_FLAG_ERRRI);

    /* Update error code */
    hdcmi->ErrorCode |= HAL_DCMI_ERROR_SYNC;

    /* Change DCMI state */
    hdcmi->State = HAL_DCMI_STATE_ERROR;
   
    /* Set the synchronization error callback */
    hdcmi->DMA_Handle->XferAbortCallback = DCMI_DMAError;

    /* Abort the DMA Transfer */
    HAL_DMA_Abort_IT(hdcmi->DMA_Handle);
  }
  /* Overflow interrupt management ********************************************/
  if((isr_value & DCMI_FLAG_OVRRI) == DCMI_FLAG_OVRRI)
  {
    /* Clear the Overflow flag */
    __HAL_DCMI_CLEAR_FLAG(hdcmi, DCMI_FLAG_OVRRI);

    /* Update error code */
    hdcmi->ErrorCode |= HAL_DCMI_ERROR_OVR;

    /* Change DCMI state */
    hdcmi->State = HAL_DCMI_STATE_ERROR;
   
    /* Set the overflow callback */
    hdcmi->DMA_Handle->XferAbortCallback = DCMI_DMAError;

    /* Abort the DMA Transfer */
    HAL_DMA_Abort_IT(hdcmi->DMA_Handle);
  }
  /* Line Interrupt management ************************************************/
  if((isr_value & DCMI_FLAG_LINERI) == DCMI_FLAG_LINERI)
  {
    /* Clear the Line interrupt flag */
    __HAL_DCMI_CLEAR_FLAG(hdcmi, DCMI_FLAG_LINERI);
   
    /* Line interrupt Callback */
    HAL_DCMI_LineEventCallback(hdcmi);
  }
  /* VSYNC interrupt management ***********************************************/
  if((isr_value & DCMI_FLAG_VSYNCRI) == DCMI_FLAG_VSYNCRI)
  {
    /* Clear the VSYNC flag */
    __HAL_DCMI_CLEAR_FLAG(hdcmi, DCMI_FLAG_VSYNCRI);
   
    /* VSYNC Callback */
    HAL_DCMI_VsyncEventCallback(hdcmi);
  }
  /* FRAME interrupt management ***********************************************/
  if((isr_value & DCMI_FLAG_FRAMERI) == DCMI_FLAG_FRAMERI)
  {
    /* When snapshot mode, disable Vsync, Error and Overrun interrupts */
    if((hdcmi->Instance->CR & DCMI_CR_CM) == DCMI_MODE_SNAPSHOT)
    {
      /* Disable the Line, Vsync, Error and Overrun interrupts */
      __HAL_DCMI_DISABLE_IT(hdcmi, DCMI_IT_LINE | DCMI_IT_VSYNC | DCMI_IT_ERR | DCMI_IT_OVR);
    }

    /* Disable the Frame interrupt */
    __HAL_DCMI_DISABLE_IT(hdcmi, DCMI_IT_FRAME);

    /* Frame Callback */
    HAL_DCMI_FrameEventCallback(hdcmi);
  }
}