求助，我用的板子是STM32F407VET6，DCMI寄存器配置成功了，但是毫无反应-第2页回答

求助，我用的板子是STM32F407VET6，DCMI寄存器配置成功了，但是毫无反应

2019-07-20 12:48发布

本帖最后由 lovebaib 于 2017-1-19 13:48 编辑

   昨天尝试了DCMI，根据手册和正点原子大大的例程写了一个DCMI配置驱动OV7725摄像头，硬件仿真的时候一直进不去DCMI的中断（PS:我把所有中断都开了），察看DCMI的配置寄存器，发现确实写入了值（正确的值），但是运行的时候DCMI->MISR寄存器一直为0，根本不变，DCMI->DR也一样，摄像头初始化能通过，VSYNC引脚也在跳变（在仿真时和示波器都确定了）。怀疑是引脚复用没通过，改了好多次都不行，请大家帮帮忙，原子哥求助
   以下是主要代码：

  RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA|RCC_AHB1Periph_GPIOB|RCC_AHB1Periph_GPIOC|RCC_AHB1Periph_GPIOE, ENABLE);//ê1ÄüGPIOA B C E ê±Öó
      RCC_AHB2PeriphClockCmd(RCC_AHB2Periph_DCMI,ENABLE);//ê1ÄüDCMIê±Öó

      //PA4/63õê¼»ˉéèÖÃ
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4|GPIO_Pin_6;//PA4/6 ¸′óÃ1|Äüêä3ö
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF; //¸′óÃ1|Äüêä3ö
  GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;//íÆíìêä3ö
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;//100MHz
  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;//éÏà-

      GPIO_PinAFConfig(GPIOA,GPIO_PinSource4,GPIO_AF_DCMI); //PA4,AF13  DCMI_HSYNC
      GPIO_PinAFConfig(GPIOA,GPIO_PinSource6,GPIO_AF_DCMI); //PA6,AF13  DCMI_PCLK

  GPIO_Init(GPIOA, &GPIO_InitStructure);//3õê¼»ˉ

  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6|GPIO_Pin_7;// PB6/7 ¸′óÃ1|Äüêä3ö

      GPIO_PinAFConfig(GPIOB,GPIO_PinSource7,GPIO_AF_DCMI); //PB7,AF13  DCMI_VSYNC
      GPIO_PinAFConfig(GPIOB,GPIO_PinSource6,GPIO_AF_DCMI); //PB6,AF13  DCMI_D5

  GPIO_Init(GPIOB, &GPIO_InitStructure);//3õê¼»ˉ

  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6|GPIO_Pin_7|GPIO_Pin_8|GPIO_Pin_9|GPIO_Pin_11;//PC6/7/8/9/11 ¸′óÃ1|Äüêä3ö

      GPIO_PinAFConfig(GPIOC,GPIO_PinSource6,GPIO_AF_DCMI); //PC6,AF13  DCMI_D0
      GPIO_PinAFConfig(GPIOC,GPIO_PinSource7,GPIO_AF_DCMI); //PC7,AF13  DCMI_D1
      GPIO_PinAFConfig(GPIOC,GPIO_PinSource8,GPIO_AF_DCMI); //PC8,AF13  DCMI_D2
      GPIO_PinAFConfig(GPIOC,GPIO_PinSource9,GPIO_AF_DCMI); //PC9,AF13  DCMI_D3
      GPIO_PinAFConfig(GPIOC,GPIO_PinSource11,GPIO_AF_DCMI);//PC11,AF13 DCMI_D4

  GPIO_Init(GPIOC, &GPIO_InitStructure);//3õê¼»ˉ

  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5|GPIO_Pin_6;//PE5/6  ¸′óÃ1|Äüêä3ö

      GPIO_PinAFConfig(GPIOE,GPIO_PinSource5,GPIO_AF_DCMI); //PE5,AF13  DCMI_D6
      GPIO_PinAFConfig(GPIOE,GPIO_PinSource6,GPIO_AF_DCMI); //PE6,AF13  DCMI_D7

  GPIO_Init(GPIOE, &GPIO_InitStructure);//3õê¼»ˉ

      DCMI_DeInit();

      DCMI_InitStructure.DCMI_CaptureMode = DCMI_CaptureMode_Continuous;
      DCMI_InitStructure.DCMI_SynchroMode = DCMI_SynchroMode_Hardware;
      DCMI_InitStructure.DCMI_PCKPolarity = DCMI_PCKPolarity_Falling;
      DCMI_InitStructure.DCMI_VSPolarity = DCMI_VSPolarity_Low;
      DCMI_InitStructure.DCMI_HSPolarity = DCMI_HSPolarity_Low;
      DCMI_InitStructure.DCMI_CaptureRate = DCMI_CaptureRate_All_Frame;
      DCMI_InitStructure.DCMI_ExtendedDataMode = DCMI_ExtendedDataMode_8b;

      DCMI_ITConfig(DCMI_IT_OVF,ENABLE);
      DCMI_ITConfig(DCMI_IT_ERR,ENABLE);
      DCMI_ITConfig(DCMI_IT_VSYNC,ENABLE);
      DCMI_ITConfig(DCMI_IT_LINE,ENABLE);
      DCMI_ITConfig(DCMI_IT_FRAME,ENABLE);//¿aÆôÖ¡ÖD¶Ï

      NVIC_InitStructure.NVIC_IRQChannel = DCMI_IRQn;
      NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=0;//ÇàÕ¼óÅÏè¼¶1
      NVIC_InitStructure.NVIC_IRQChannelSubPriority =2;             //×óóÅÏè¼¶3
      NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;                      //IRQí¨μàê1Äü
      NVIC_Init(&NVIC_InitStructure);       //¸ù¾YÖ¸¶¨μÄ2Îêy3õê¼»ˉVIC¼Ä′æÆ÷¡￠

      DCMI_Init(&DCMI_InitStructure);

      DCMI_Cmd(ENABLE);       //DCMIê1Äü

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