Stm32f4 and DCMI problem

Posted on April 26, 2016 at 08:28

hello 

I get overflow on DCMI .

please see my code.

DCMI config : 

 hdcmi.Instance = DCMI;

  hdcmi.Init.SynchroMode = DCMI_SYNCHRO_HARDWARE;

  hdcmi.Init.PCKPolarity = DCMI_PCKPOLARITY_RISING;

  hdcmi.Init.VSPolarity = DCMI_VSPOLARITY_LOW;

  hdcmi.Init.HSPolarity = DCMI_HSPOLARITY_HIGH;

  hdcmi.Init.CaptureRate = DCMI_CR_ALL_FRAME;

  hdcmi.Init.ExtendedDataMode = DCMI_EXTEND_DATA_8B;

  hdcmi.Init.JPEGMode = DCMI_JPEG_DISABLE;

  HAL_DCMI_Init(&hdcmi);

DMA config :

 hdma_dcmi.Instance = DMA2_Stream1;

    hdma_dcmi.Init.Channel = DMA_CHANNEL_1;

    hdma_dcmi.Init.Direction = DMA_PERIPH_TO_MEMORY;

    hdma_dcmi.Init.PeriphInc = DMA_PINC_DISABLE;

    hdma_dcmi.Init.MemInc = DMA_MINC_ENABLE;

    hdma_dcmi.Init.PeriphDataAlignment = DMA_PDATAALIGN_WORD;

    hdma_dcmi.Init.MemDataAlignment = DMA_MDATAALIGN_WORD;

    hdma_dcmi.Init.Mode = DMA_NORMAL;

    hdma_dcmi.Init.Priority = DMA_PRIORITY_LOW;

    hdma_dcmi.Init.FIFOMode = DMA_FIFOMODE_DISABLE;

    HAL_DMA_Init(&hdma_dcmi);

global : 

uint16_t CameraBuffer[160*120];

I config my sensor 160*120 RGB565

start capture :

Camera_SnapshotStart((uint8_t*)CameraBuffer);

Capture function :

void Camera_SnapshotStart(uint8_t *buff)

{ 

hdcmi.DMA_Handle->Init.Mode = DMA_NORMAL;

  HAL_DCMI_Start_DMA(&hdcmi, DCMI_MODE_SNAPSHOT, (uint32_t)buff,9600);  

}

what is my proble ?

#overflow