YCbCr视频输入STM32F746 [英] YCbCr Video Input STM32F746

问题描述

我正在研究基于STM32F746的定制板，该定制板集成了LCD和ADV7180视频解码器IC.

I am working on STM32F746 based custom board which is integrated with LCD and a ADV7180 video decoder IC.

我将ADV7180配置为以自由运行模式运行.使用DCMI将Camera数据获取到指定的缓冲区.

I Configured the ADV7180 to run in the free run mode. Getting the Camera data using DCMI to a specified buffer.

我正在尝试将YCbCr 4:2:2数据转换为RBG数据.我正在排队活动. . 从实时事件中，我正在执行以下代码，将其转换为RGB，然后使用ARGB888将其加载到LCD.

I am trying to Convert the YCbCr 4:2:2 data to the RBG data. I am getting the Line Events. . From the Live events I am executing the below piece of code to convert it to the RGB and then load the it to the LCD using ARGB888.

LCD_FRAME_BUFFER 0xC0000000 LCD_FRAME_BUFFER_LAYER1 0xC0130000 CAMERA_FRAME_BUFFER 0xC0260000

LCD_FRAME_BUFFER 0xC0000000 LCD_FRAME_BUFFER_LAYER1 0xC0130000 CAMERA_FRAME_BUFFER 0xC0260000

void LCD_LL_Test(void *pSrc, void *pDst, uint32_t lcd_offset, uint32_t cam_offset)
{ 

  uint32_t * pTempDest = (uint32_t *)(LCD_FRAME_BUFFER_LAYER1);
  uint32_t * pTempSource = (uint32_t *)(CAMERA_FRAME_BUFFER+cam_offset);

  uint32_t * pFinalDest = (uint32_t *)(LCD_FRAME_BUFFER+lcd_offset);
  uint32_t * pFinalSource = (uint32_t *)(LCD_FRAME_BUFFER_LAYER1);

  for(uint32_t i = 0; i < (480/2) ; i++ ){
    uint32_t te =  *pTempSource;   
    // CB Y1 CR , RESULT  
    toRGB( (te>>0),(te>>8),(te>>16) ,(uint32_t *)pTempDest);
    pTempDest++;
    // CB Y2 CR , RESULT 
    toRGB( (te>>0),(te>>24),(te>>16) ,(uint32_t *)pTempDest);
    pTempDest++;
    pTempSource++;
  }
  static DMA2D_HandleTypeDef hDma2dEval;  

  hDma2dEval.Init.Mode         = DMA2D_M2M_PFC;
  hDma2dEval.Init.ColorMode    = DMA2D_OUTPUT_ARGB8888;
  hDma2dEval.Init.OutputOffset = 0;     

  hDma2dEval.LayerCfg[1].AlphaMode = DMA2D_NO_MODIF_ALPHA;
  hDma2dEval.LayerCfg[1].InputAlpha = 0xFF;
  hDma2dEval.LayerCfg[1].InputColorMode = DMA2D_RGB888;
  hDma2dEval.LayerCfg[1].InputOffset = 0;

  hDma2dEval.Instance = DMA2D; 

  /* DMA2D Initialization */
  if(HAL_DMA2D_Init(&hDma2dEval) == HAL_OK) 
  {
    if(HAL_DMA2D_ConfigLayer(&hDma2dEval, 1) == HAL_OK) 
    {
      if (HAL_DMA2D_Start(&hDma2dEval, (uint32_t)pFinalSource, (uint32_t )(pFinalDest), BSP_LCD_GetXSize()*4, 1) == HAL_OK)
      {
        /* Polling For DMA transfer */  
        HAL_DMA2D_PollForTransfer(&hDma2dEval, 10);
      }
    }
  } 
}

我已经使用LCD_FRAME_BUFFER初始化了LCD，并且我仅使用单层.

I have initialised the LCD with LCD_FRAME_BUFFER and I am using single layer only.

我正在转换数据，并使用中间的LCD_FRAME_BUFFER_LAYER1缓冲区将其复制到LCD_FRAME_BUFFER.

I am converting the data and copying it to the LCD_FRAME_BUFFER using an intermediate LCD_FRAME_BUFFER_LAYER1 buffer.

DCMI-> CAMERA_FRAME_BUFFER->转换-​​> LCD_FRAME_BUFFER_LAYER1-> DMA-> LCD_FRAME_BUFFER

DCMI --> CAMERA_FRAME_BUFFER --> CONVERSION --> LCD_FRAME_BUFFER_LAYER1 --> DMA -> LCD_FRAME_BUFFER

但是，我没有将自由运行模式屏幕显示为BLUE屏幕.

But, I am not getting the free run mode screen as BLUE Screen.

推荐答案

在将0xC0000000配置为使用外部RAM时，请确保已配置FMC并将其初始化为自刷新.

When you are using 0xC0000000 is configured to external RAM, make sure FMC is configured and initialized to self refresh.

确保FMC配置为FMC_SDRAM_CAS_LATENCY_3

Make sure FMC configuration is FMC_SDRAM_CAS_LATENCY_3

尝试在FMC初始化的末尾添加附加功能

Try to add attached function in the end of FMC init

void MX_SDRAM_InitEx(void)
{
  __IO uint32_t tmpmrd = 0;

  /* Step 1: Configure a clock configuration enable command */
  Command.CommandMode            = FMC_SDRAM_CMD_CLK_ENABLE;
  Command.CommandTarget          =  FMC_SDRAM_CMD_TARGET_BANK1;
  Command.AutoRefreshNumber      = 1;
  Command.ModeRegisterDefinition = 0;

  /* Send the command */
  HAL_SDRAM_SendCommand(&hsdram1, &Command, SDRAM_TIMEOUT);

  /* Step 2: Insert 100 us minimum delay */
  /* Inserted delay is equal to 1 ms due to systick time base unit (ms) */
  HAL_Delay(1);

  /* Step 3: Configure a PALL (precharge all) command */
  Command.CommandMode            = FMC_SDRAM_CMD_PALL;
  Command.CommandTarget          = FMC_SDRAM_CMD_TARGET_BANK1;
  Command.AutoRefreshNumber      = 1;
  Command.ModeRegisterDefinition = 0;

  /* Send the command */
  HAL_SDRAM_SendCommand(&hsdram1, &Command, SDRAM_TIMEOUT);

  /* Step 4: Configure an Auto Refresh command */
  Command.CommandMode            = FMC_SDRAM_CMD_AUTOREFRESH_MODE;
  Command.CommandTarget          = FMC_SDRAM_CMD_TARGET_BANK1;
  Command.AutoRefreshNumber      = 8;
  Command.ModeRegisterDefinition = 0;

  /* Send the command */
  HAL_SDRAM_SendCommand(&hsdram1, &Command, SDRAM_TIMEOUT);

  /* Step 5: Program the external memory mode register */
  tmpmrd = (uint32_t)SDRAM_MODEREG_BURST_LENGTH_1          |\
                     SDRAM_MODEREG_BURST_TYPE_SEQUENTIAL   |\
                     SDRAM_MODEREG_CAS_LATENCY_3           |\
                     SDRAM_MODEREG_OPERATING_MODE_STANDARD |\
                     SDRAM_MODEREG_WRITEBURST_MODE_SINGLE;

  Command.CommandMode            = FMC_SDRAM_CMD_LOAD_MODE;
  Command.CommandTarget          = FMC_SDRAM_CMD_TARGET_BANK1;
  Command.AutoRefreshNumber      = 1;
  Command.ModeRegisterDefinition = tmpmrd;

  /* Send the command */
  HAL_SDRAM_SendCommand(&hsdram1, &Command, SDRAM_TIMEOUT);

  /* Step 6: Set the refresh rate counter */
  /* Set the device refresh rate */
  HAL_SDRAM_ProgramRefreshRate(&hsdram1, REFRESH_COUNT);
}

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