luyongyun 发表于 2016-3-17 18:15
请问楼主，你的SRAM是外部的吗？我也是DCMI到外部SRAM，然后帧中断用LCD_WriteRAM(*p++)一个个点写进LCD， ...

代码看看，是不是dma配置出了问题?

惊为天人 发表于 2016-3-18 08:03
代码看看，是不是dma配置出了问题?

void OV9655_Init(ImageFormat_TypeDef ImageFormat)
{
  DCMI_InitTypeDef DCMI_InitStructure;
  DMA_InitTypeDef  DMA_InitStructure;

  /*** Configures the DCMI to interface with the OV9655 camera module ***/
  /* Enable DCMI clock */
  RCC_AHB2PeriphClockCmd(RCC_AHB2Periph_DCMI, ENABLE);
  DCMI_DeInit();//清除原来的设置
  /* DCMI configuration */
  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_High;
  DCMI_InitStructure.DCMI_HSPolarity = DCMI_HSPolarity_High;
  DCMI_InitStructure.DCMI_CaptureRate = DCMI_CaptureRate_All_Frame;
  DCMI_InitStructure.DCMI_ExtendedDataMode = DCMI_ExtendedDataMode_8b;
  DCMI_Init(&DCMI_InitStructure);
          
  /* Configures the DMA2 to transfer Data from DCMI */
  /* Enable DMA2 clock */
  RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_DMA2, ENABLE);
  
  /* DMA2 Stream1 Configuration */
  DMA_DeInit(DMA2_Stream1);
//  while (DMA_GetCmdStatus(DMA2_Stream1) != DISABLE){}
          
  DMA_InitStructure.DMA_Channel = DMA_Channel_1;  
  DMA_InitStructure.DMA_PeripheralBaseAddr = DCMI_DR_ADDRESS;       
  DMA_InitStructure.DMA_Memory0BaseAddr = FSMC_Bank1_NORSRAM3;
  DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralToMemory;
  DMA_InitStructure.DMA_BufferSize = 0x4b00;   //0x4b00;
  DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
  DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
  DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Word;
  DMA_InitStructure.DMA_MemoryDataSize = DMA_PeripheralDataSize_Word;   //DMA_MemoryDataSize_HalfWord;
  DMA_InitStructure.DMA_Mode = DMA_Mode_Normal;  //DMA_Mode_Normal;
  DMA_InitStructure.DMA_Priority = DMA_Priority_High;
  DMA_InitStructure.DMA_FIFOMode = DMA_FIFOMode_Disable;
  DMA_InitStructure.DMA_FIFOThreshold = DMA_FIFOThreshold_Full;
  DMA_InitStructure.DMA_MemoryBurst = DMA_MemoryBurst_Single;
  DMA_InitStructure.DMA_PeripheralBurst = DMA_PeripheralBurst_Single;
  DMA_Init(DMA2_Stream1, &DMA_InitStructure);//初始化DMA Stream
  
  DMA_DoubleBufferModeConfig(DMA2_Stream1,FSMC_Bank1_NORSRAM3+(0x4b00*4),DMA_Memory_0);   // Double Buffer Mode
  DMA_DoubleBufferModeCmd(DMA2_Stream1,ENABLE);         // Double Buffer Mode

}