YCbCr视频输入STM32F746

2024-06-02 • 问答

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。

我将ADV7180配置为以自由运行模式运行。使用DCMI将相机数据获取到指定的缓冲区。

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。

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),(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。

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。

DCMI-> CAMERA_FRAME_BUFFER->转换-> 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。

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

YCbCr视频输入STM32F746

bbyyk 回答：YCbCr视频输入STM32F746

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