STM32F4 DMA2D_M2M_PFC

此例程为STM324x9I_EVAL：DCMI_CaptureMode，使用的stm32f4xx_hal_driver，

At each camera line event, the line is converted to ARGB8888 pixel format
and transferred to LCD_FRAME_BUFFER using DMA2D.

这里仅记录例程中DMA2D这段，Camera RGB565格式 LCD RGB888

 1 /**
 2   * @brief  Converts a line to an ARGB8888 pixel format.
 3   * @param  pSrc: Pointer to source buffer
 4   * @param  pDst: Output color
 5   * @param  xSize: Buffer width
 6   * @param  ColorMode: Input color mode   
 7   * @retval None
 8   */
 9 static void LCD_LL_ConvertLineToARGB8888(void *pSrc, void *pDst)
10 { 
11   /* Enable DMA2D clock */
12   __HAL_RCC_DMA2D_CLK_ENABLE();
13   
14   /* Configure the DMA2D Mode, Color Mode and output offset */
15   hdma2d_eval.Init.Mode         = DMA2D_M2M_PFC;
16   hdma2d_eval.Init.ColorMode    = DMA2D_ARGB8888;
17   hdma2d_eval.Init.OutputOffset = 0;     
18   
19   /* Foreground Configuration */
20   hdma2d_eval.LayerCfg[1].AlphaMode = DMA2D_NO_MODIF_ALPHA;
21   hdma2d_eval.LayerCfg[1].InputAlpha = 0xFF;
22   hdma2d_eval.LayerCfg[1].InputColorMode = CM_RGB565;
23   hdma2d_eval.LayerCfg[1].InputOffset = 0;
24   
25   hdma2d_eval.Instance = DMA2D; 
26   
27   /* DMA2D Initialization */
28   if(HAL_DMA2D_Init(&hdma2d_eval) == HAL_OK) 
29   {
30     if(HAL_DMA2D_ConfigLayer(&hdma2d_eval, 1) == HAL_OK) 
31     {
32       if (HAL_DMA2D_Start(&hdma2d_eval, (uint32_t)pSrc, (uint32_t)pDst, BSP_LCD_GetXSize(), 1) == HAL_OK)
33       {
34         /* Polling For DMA transfer */  
35         HAL_DMA2D_PollForTransfer(&hdma2d_eval, 10);
36       }
37     }
38   }
39   else
40   {
41     /* FatFs Initialization Error */
42     Error_Handler();
43   }
44 }
LCD_LL_ConvertLineToARGB8888

分析初始化中代码：static DMA2D_HandleTypeDef hdma2d_eval;

 1 typedef struct __DMA2D_HandleTypeDef
 2 {
 3   DMA2D_TypeDef               *Instance;                                                    /*!< DMA2D Register base address       */
 4 
 5   DMA2D_InitTypeDef           Init;                                                         /*!< DMA2D communication parameters    */ 
 6 
 7   void                        (* XferCpltCallback)(struct __DMA2D_HandleTypeDef * hdma2d);  /*!< DMA2D transfer complete callback  */
 8 
 9   void                        (* XferErrorCallback)(struct __DMA2D_HandleTypeDef * hdma2d); /*!< DMA2D transfer error callback     */
10 
11   DMA2D_LayerCfgTypeDef       LayerCfg[MAX_DMA2D_LAYER];                                    /*!< DMA2D Layers parameters           */  
12 
13   HAL_LockTypeDef             Lock;                                                         /*!< DMA2D Lock                        */  
14 
15   __IO HAL_DMA2D_StateTypeDef State;                                                        /*!< DMA2D transfer state              */
16 
17   __IO uint32_t               ErrorCode;                                                    /*!< DMA2D Error code                  */  
18 } DMA2D_HandleTypeDef;
DMA2D_HandleTypeDef
 1 typedef struct
 2 {
 3   __IO uint32_t CR;            /*!< DMA2D Control Register,                         Address offset: 0x00 */
 4   __IO uint32_t ISR;           /*!< DMA2D Interrupt Status Register,                Address offset: 0x04 */
 5   __IO uint32_t IFCR;          /*!< DMA2D Interrupt Flag Clear Register,            Address offset: 0x08 */
 6   __IO uint32_t FGMAR;         /*!< DMA2D Foreground Memory Address Register,       Address offset: 0x0C */
 7   __IO uint32_t FGOR;          /*!< DMA2D Foreground Offset Register,               Address offset: 0x10 */
 8   __IO uint32_t BGMAR;         /*!< DMA2D Background Memory Address Register,       Address offset: 0x14 */
 9   __IO uint32_t BGOR;          /*!< DMA2D Background Offset Register,               Address offset: 0x18 */
10   __IO uint32_t FGPFCCR;       /*!< DMA2D Foreground PFC Control Register,          Address offset: 0x1C */
11   __IO uint32_t FGCOLR;        /*!< DMA2D Foreground Color Register,                Address offset: 0x20 */
12   __IO uint32_t BGPFCCR;       /*!< DMA2D Background PFC Control Register,          Address offset: 0x24 */
13   __IO uint32_t BGCOLR;        /*!< DMA2D Background Color Register,                Address offset: 0x28 */
14   __IO uint32_t FGCMAR;        /*!< DMA2D Foreground CLUT Memory Address Register,  Address offset: 0x2C */
15   __IO uint32_t BGCMAR;        /*!< DMA2D Background CLUT Memory Address Register,  Address offset: 0x30 */
16   __IO uint32_t OPFCCR;        /*!< DMA2D Output PFC Control Register,              Address offset: 0x34 */
17   __IO uint32_t OCOLR;         /*!< DMA2D Output Color Register,                    Address offset: 0x38 */
18   __IO uint32_t OMAR;          /*!< DMA2D Output Memory Address Register,           Address offset: 0x3C */
19   __IO uint32_t OOR;           /*!< DMA2D Output Offset Register,                   Address offset: 0x40 */
20   __IO uint32_t NLR;           /*!< DMA2D Number of Line Register,                  Address offset: 0x44 */
21   __IO uint32_t LWR;           /*!< DMA2D Line Watermark Register,                  Address offset: 0x48 */
22   __IO uint32_t AMTCR;         /*!< DMA2D AHB Master Timer Configuration Register,  Address offset: 0x4C */
23   uint32_t      RESERVED[236]; /*!< Reserved, 0x50-0x3FF */
24   __IO uint32_t FGCLUT[256];   /*!< DMA2D Foreground CLUT,                          Address offset:400-7FF */
25   __IO uint32_t BGCLUT[256];   /*!< DMA2D Background CLUT,                          Address offset:800-BFF */
26 } DMA2D_TypeDef;
DMA2D_TypeDef
 1 /** 
 2   * @brief DMA2D Init structure definition
 3   */
 4 typedef struct
 5 {
 6   uint32_t             Mode;               /*!< configures the DMA2D transfer mode.
 7                                                 This parameter can be one value of @ref DMA2D_Mode */
 8 
 9   uint32_t             ColorMode;          /*!< configures the color format of the output image.
10                                                 This parameter can be one value of @ref DMA2D_Color_Mode */
11 
12   uint32_t             OutputOffset;       /*!< Specifies the Offset value. 
13                                                 This parameter must be a number between Min_Data = 0x0000 and Max_Data = 0x3FFF. */ 
14 } DMA2D_InitTypeDef;
DMA2D_InitTypeDef

/* Configure the DMA2D Mode, Color Mode and output offset */
hdma2d_eval.Init.Mode = DMA2D_M2M_PFC;                    //DMA2D_CR        DMA2D模式
hdma2d_eval.Init.ColorMode = DMA2D_ARGB8888;          //DMA2D_OPFCCR 输出颜色模式
hdma2d_eval.Init.OutputOffset = 0;                               //DMA2D_OOR

这三个在上一篇中已经分析过这三个参数在HAL_DMA2D_Init(&hdma2d_eval)中执行

 1 /**
 2   * @brief  Initializes the DMA2D according to the specified
 3   *         parameters in the DMA2D_InitTypeDef and create the associated handle.
 4   * @param  hdma2d: pointer to a DMA2D_HandleTypeDef structure that contains
 5   *                 the configuration information for the DMA2D.
 6   * @retval HAL status
 7   */
 8 HAL_StatusTypeDef HAL_DMA2D_Init(DMA2D_HandleTypeDef *hdma2d)
 9 { 
10   uint32_t tmp = 0;
11 
12   /* Check the DMA2D peripheral state */
13   if(hdma2d == NULL)
14   {
15      return HAL_ERROR;
16   }
17 
18   /* Check the parameters */
19   assert_param(IS_DMA2D_ALL_INSTANCE(hdma2d->Instance));
20   assert_param(IS_DMA2D_MODE(hdma2d->Init.Mode));
21   assert_param(IS_DMA2D_CMODE(hdma2d->Init.ColorMode));
22   assert_param(IS_DMA2D_OFFSET(hdma2d->Init.OutputOffset));
23 
24   if(hdma2d->State == HAL_DMA2D_STATE_RESET)
25   {
26     /* Allocate lock resource and initialize it */
27     hdma2d->Lock = HAL_UNLOCKED;
28     /* Init the low level hardware */
29     HAL_DMA2D_MspInit(hdma2d);
30   }
31   
32   /* Change DMA2D peripheral state */
33   hdma2d->State = HAL_DMA2D_STATE_BUSY;  
34 
35 /* DMA2D CR register configuration -------------------------------------------*/
36   /* Get the CR register value */
37   tmp = hdma2d->Instance->CR;
38 
39   /* Clear Mode bits */
40   tmp &= (uint32_t)~DMA2D_CR_MODE;
41 
42   /* Prepare the value to be wrote to the CR register */
43   tmp |= hdma2d->Init.Mode;
44 
45   /* Write to DMA2D CR register */
46   hdma2d->Instance->CR = tmp;
47 
48 /* DMA2D OPFCCR register configuration ---------------------------------------*/
49   /* Get the OPFCCR register value */
50   tmp = hdma2d->Instance->OPFCCR;
51 
52   /* Clear Color Mode bits */
53   tmp &= (uint32_t)~DMA2D_OPFCCR_CM;
54 
55   /* Prepare the value to be wrote to the OPFCCR register */
56   tmp |= hdma2d->Init.ColorMode;
57 
58   /* Write to DMA2D OPFCCR register */
59   hdma2d->Instance->OPFCCR = tmp;
60 
61 /* DMA2D OOR register configuration ------------------------------------------*/  
62   /* Get the OOR register value */
63   tmp = hdma2d->Instance->OOR;
64 
65   /* Clear Offset bits */
66   tmp &= (uint32_t)~DMA2D_OOR_LO;
67 
68   /* Prepare the value to be wrote to the OOR register */
69   tmp |= hdma2d->Init.OutputOffset;
70 
71   /* Write to DMA2D OOR register */
72   hdma2d->Instance->OOR = tmp;
73 
74   /* Update error code */
75   hdma2d->ErrorCode = HAL_DMA2D_ERROR_NONE;
76 
77   /* Initialize the DMA2D state*/
78   hdma2d->State  = HAL_DMA2D_STATE_READY;
79 
80   return HAL_OK;
81 }
HAL_DMA2D_Init

hdma2d_eval.Instance = DMA2D; 

 DMA2D_TypeDef               *Instance; 

#define DMA2D               ((DMA2D_TypeDef *)DMA2D_BASE)

这里是指向DMA2D的寄存器

 1 /** 
 2   * @brief DMA2D Layer structure definition
 3   */
 4 typedef struct
 5 {
 6   uint32_t             InputOffset;       /*!< configures the DMA2D foreground offset.
 7                                                This parameter must be a number between Min_Data = 0x0000 and Max_Data = 0x3FFF. */
 8 
 9   uint32_t             InputColorMode;    /*!< configures the DMA2D foreground color mode . 
10                                                This parameter can be one value of @ref DMA2D_Input_Color_Mode */
11 
12   uint32_t             AlphaMode;         /*!< configures the DMA2D foreground alpha mode. 
13                                                This parameter can be one value of @ref DMA2D_ALPHA_MODE */
14 
15   uint32_t             InputAlpha;        /*!< Specifies the DMA2D foreground alpha value and color value in case of A8 or A4 color mode. 
16                                                This parameter must be a number between Min_Data = 0x00000000 and Max_Data = 0xFFFFFFFF 
17                                                in case of A8 or A4 color mode (ARGB). 
18                                                Otherwise, This parameter must be a number between Min_Data = 0x00 and Max_Data = 0xFF.*/
19 
20 } DMA2D_LayerCfgTypeDef;
DMA2D_LayerCfgTypeDef

/* Foreground Configuration */
hdma2d_eval.LayerCfg[1].AlphaMode = DMA2D_NO_MODIF_ALPHA;     //DMA2D_FGPFCCR
hdma2d_eval.LayerCfg[1].InputAlpha = 0xFF;                                       //DMA2D_FGPFCCR
hdma2d_eval.LayerCfg[1].InputColorMode = CM_RGB565;                   //DMA2D_FGPFCCR
hdma2d_eval.LayerCfg[1].InputOffset = 0;                                           //DMA2D_FGOR

前景色的配置，由摄像头输入，配置了透明度和颜色模式与偏移

设置函数：HAL_DMA2D_ConfigLayer(&hdma2d_eval, 1)

  1 /**
  2   * @brief  Configure the DMA2D Layer according to the specified
  3   *         parameters in the DMA2D_InitTypeDef and create the associated handle.
  4   * @param  hdma2d: pointer to a DMA2D_HandleTypeDef structure that contains
  5   *                 the configuration information for the DMA2D.
  6   * @param  LayerIdx: DMA2D Layer index.
  7   *                   This parameter can be one of the following values:
  8   *                   0(background) / 1(foreground)
  9   * @retval HAL status
 10   */
 11 HAL_StatusTypeDef HAL_DMA2D_ConfigLayer(DMA2D_HandleTypeDef *hdma2d, uint32_t LayerIdx)
 12 { 
 13   DMA2D_LayerCfgTypeDef *pLayerCfg = &hdma2d->LayerCfg[LayerIdx];
 14   
 15   uint32_t tmp = 0;
 16   
 17   /* Process locked */
 18   __HAL_LOCK(hdma2d);
 19   
 20   /* Change DMA2D peripheral state */
 21   hdma2d->State = HAL_DMA2D_STATE_BUSY; 
 22   
 23   /* Check the parameters */
 24   assert_param(IS_DMA2D_LAYER(LayerIdx));  
 25   assert_param(IS_DMA2D_OFFSET(pLayerCfg->InputOffset));  
 26   if(hdma2d->Init.Mode != DMA2D_R2M)
 27   {  
 28     assert_param(IS_DMA2D_INPUT_COLOR_MODE(pLayerCfg->InputColorMode));
 29     if(hdma2d->Init.Mode != DMA2D_M2M)
 30     {
 31       assert_param(IS_DMA2D_ALPHA_MODE(pLayerCfg->AlphaMode));
 32     }
 33   }
 34   
 35   /* Configure the background DMA2D layer */
 36   if(LayerIdx == 0)
 37   {
 38     /* DMA2D BGPFCR register configuration -----------------------------------*/
 39     /* Get the BGPFCCR register value */
 40     tmp = hdma2d->Instance->BGPFCCR;
 41     
 42     /* Clear Input color mode, alpha value and alpha mode bits */
 43     tmp &= (uint32_t)~(DMA2D_BGPFCCR_CM | DMA2D_BGPFCCR_AM | DMA2D_BGPFCCR_ALPHA); 
 44     
 45     if ((pLayerCfg->InputColorMode == CM_A4) || (pLayerCfg->InputColorMode == CM_A8))
 46     {
 47       /* Prepare the value to be wrote to the BGPFCCR register */
 48       tmp |= (pLayerCfg->InputColorMode | (pLayerCfg->AlphaMode << 16) | ((pLayerCfg->InputAlpha) & 0xFF000000));
 49     }
 50     else
 51     {
 52       /* Prepare the value to be wrote to the BGPFCCR register */
 53       tmp |= (pLayerCfg->InputColorMode | (pLayerCfg->AlphaMode << 16) | (pLayerCfg->InputAlpha << 24));
 54     }
 55     
 56     /* Write to DMA2D BGPFCCR register */
 57     hdma2d->Instance->BGPFCCR = tmp; 
 58     
 59     /* DMA2D BGOR register configuration -------------------------------------*/  
 60     /* Get the BGOR register value */
 61     tmp = hdma2d->Instance->BGOR;
 62     
 63     /* Clear colors bits */
 64     tmp &= (uint32_t)~DMA2D_BGOR_LO; 
 65     
 66     /* Prepare the value to be wrote to the BGOR register */
 67     tmp |= pLayerCfg->InputOffset;
 68     
 69     /* Write to DMA2D BGOR register */
 70     hdma2d->Instance->BGOR = tmp;
 71     
 72     if ((pLayerCfg->InputColorMode == CM_A4) || (pLayerCfg->InputColorMode == CM_A8))
 73     {
 74       /* Prepare the value to be wrote to the BGCOLR register */
 75       tmp |= ((pLayerCfg->InputAlpha) & 0x00FFFFFF);
 76     
 77       /* Write to DMA2D BGCOLR register */
 78       hdma2d->Instance->BGCOLR = tmp;
 79     }    
 80   }
 81   /* Configure the foreground DMA2D layer */
 82   else
 83   {
 84     /* DMA2D FGPFCR register configuration -----------------------------------*/
 85     /* Get the FGPFCCR register value */
 86     tmp = hdma2d->Instance->FGPFCCR;
 87     
 88     /* Clear Input color mode, alpha value and alpha mode bits */
 89     tmp &= (uint32_t)~(DMA2D_FGPFCCR_CM | DMA2D_FGPFCCR_AM | DMA2D_FGPFCCR_ALPHA); 
 90     
 91     if ((pLayerCfg->InputColorMode == CM_A4) || (pLayerCfg->InputColorMode == CM_A8))
 92     {
 93       /* Prepare the value to be wrote to the FGPFCCR register */
 94       tmp |= (pLayerCfg->InputColorMode | (pLayerCfg->AlphaMode << 16) | ((pLayerCfg->InputAlpha) & 0xFF000000));
 95     }
 96     else
 97     {
 98       /* Prepare the value to be wrote to the FGPFCCR register */
 99       tmp |= (pLayerCfg->InputColorMode | (pLayerCfg->AlphaMode << 16) | (pLayerCfg->InputAlpha << 24));
100     }
101     
102     /* Write to DMA2D FGPFCCR register */
103     hdma2d->Instance->FGPFCCR = tmp; 
104     
105     /* DMA2D FGOR register configuration -------------------------------------*/  
106     /* Get the FGOR register value */
107     tmp = hdma2d->Instance->FGOR;
108     
109     /* Clear colors bits */
110     tmp &= (uint32_t)~DMA2D_FGOR_LO; 
111     
112     /* Prepare the value to be wrote to the FGOR register */
113     tmp |= pLayerCfg->InputOffset;
114     
115     /* Write to DMA2D FGOR register */
116     hdma2d->Instance->FGOR = tmp;
117    
118     if ((pLayerCfg->InputColorMode == CM_A4) || (pLayerCfg->InputColorMode == CM_A8))
119     {
120       /* Prepare the value to be wrote to the FGCOLR register */
121       tmp |= ((pLayerCfg->InputAlpha) & 0x00FFFFFF);
122     
123       /* Write to DMA2D FGCOLR register */
124       hdma2d->Instance->FGCOLR = tmp;
125     }   
126   }    
127   /* Initialize the DMA2D state*/
128   hdma2d->State  = HAL_DMA2D_STATE_READY;
129   
130   /* Process unlocked */
131   __HAL_UNLOCK(hdma2d);  
132   
133   return HAL_OK;
134 }
HAL_DMA2D_ConfigLayer

 可以看到FG和BG是输入数据源，所以这些是对输入数据的设置

 1 /**
 2   * @brief  Start the DMA2D Transfer.
 3   * @param  hdma2d:     pointer to a DMA2D_HandleTypeDef structure that contains
 4   *                     the configuration information for the DMA2D.  
 5   * @param  pdata:      Configure the source memory Buffer address if 
 6   *                     the memory to memory or memory to memory with pixel format 
 7   *                     conversion DMA2D mode is selected, and configure 
 8   *                     the color value if register to memory DMA2D mode is selected.
 9   * @param  DstAddress: The destination memory Buffer address.
10   * @param  Width:      The width of data to be transferred from source to destination.
11   * @param  Height:      The height of data to be transferred from source to destination.
12   * @retval HAL status
13   */
14 HAL_StatusTypeDef HAL_DMA2D_Start(DMA2D_HandleTypeDef *hdma2d, uint32_t pdata, uint32_t DstAddress, uint32_t Width,  uint32_t Height)
15 {
16   /* Process locked */
17   __HAL_LOCK(hdma2d);
18 
19   /* Change DMA2D peripheral state */
20   hdma2d->State = HAL_DMA2D_STATE_BUSY;
21 
22   /* Check the parameters */
23   assert_param(IS_DMA2D_LINE(Height));
24   assert_param(IS_DMA2D_PIXEL(Width));
25 
26   /* Disable the Peripheral */
27   __HAL_DMA2D_DISABLE(hdma2d);
28 
29   /* Configure the source, destination address and the data size */
30   DMA2D_SetConfig(hdma2d, pdata, DstAddress, Width, Height);
31 
32   /* Enable the Peripheral */
33   __HAL_DMA2D_ENABLE(hdma2d);
34 
35   return HAL_OK;
36 }
HAL_DMA2D_Start
 1 /**
 2   * @brief  Set the DMA2D Transfer parameter.
 3   * @param  hdma2d:     pointer to a DMA2D_HandleTypeDef structure that contains
 4   *                     the configuration information for the specified DMA2D.  
 5   * @param  pdata:      The source memory Buffer address
 6   * @param  DstAddress: The destination memory Buffer address
 7   * @param  Width:      The width of data to be transferred from source to destination.
 8   * @param  Height:     The height of data to be transferred from source to destination.
 9   * @retval HAL status
10   */
11 static void DMA2D_SetConfig(DMA2D_HandleTypeDef *hdma2d, uint32_t pdata, uint32_t DstAddress, uint32_t Width, uint32_t Height)
12 {  
13   uint32_t tmp = 0;
14   uint32_t tmp1 = 0;
15   uint32_t tmp2 = 0;
16   uint32_t tmp3 = 0;
17   uint32_t tmp4 = 0;
18   
19   tmp = Width << 16;
20   
21   /* Configure DMA2D data size */
22   hdma2d->Instance->NLR = (Height | tmp);
23   
24   /* Configure DMA2D destination address */
25   hdma2d->Instance->OMAR = DstAddress;
26  
27   /* Register to memory DMA2D mode selected */
28   if (hdma2d->Init.Mode == DMA2D_R2M)
29   {    
30     tmp1 = pdata & DMA2D_OCOLR_ALPHA_1;
31     tmp2 = pdata & DMA2D_OCOLR_RED_1;
32     tmp3 = pdata & DMA2D_OCOLR_GREEN_1;
33     tmp4 = pdata & DMA2D_OCOLR_BLUE_1;
34     
35     /* Prepare the value to be wrote to the OCOLR register according to the color mode */
36     if (hdma2d->Init.ColorMode == DMA2D_ARGB8888)
37     {
38       tmp = (tmp3 | tmp2 | tmp1| tmp4);
39     }
40     else if (hdma2d->Init.ColorMode == DMA2D_RGB888)
41     {
42       tmp = (tmp3 | tmp2 | tmp4);  
43     }
44     else if (hdma2d->Init.ColorMode == DMA2D_RGB565)
45     {
46       tmp2 = (tmp2 >> 19);
47       tmp3 = (tmp3 >> 10);
48       tmp4 = (tmp4 >> 3 );
49       tmp  = ((tmp3 << 5) | (tmp2 << 11) | tmp4); 
50     }
51     else if (hdma2d->Init.ColorMode == DMA2D_ARGB1555)
52     { 
53       tmp1 = (tmp1 >> 31);
54       tmp2 = (tmp2 >> 19);
55       tmp3 = (tmp3 >> 11);
56       tmp4 = (tmp4 >> 3 );      
57       tmp  = ((tmp3 << 5) | (tmp2 << 10) | (tmp1 << 15) | tmp4);    
58     } 
59     else /* DMA2D_CMode = DMA2D_ARGB4444 */
60     {
61       tmp1 = (tmp1 >> 28);
62       tmp2 = (tmp2 >> 20);
63       tmp3 = (tmp3 >> 12);
64       tmp4 = (tmp4 >> 4 );
65       tmp  = ((tmp3 << 4) | (tmp2 << 8) | (tmp1 << 12) | tmp4);
66     }    
67     /* Write to DMA2D OCOLR register */
68     hdma2d->Instance->OCOLR = tmp;
69   } 
70   else /* M2M, M2M_PFC or M2M_Blending DMA2D Mode */
71   {
72     /* Configure DMA2D source address */
73     hdma2d->Instance->FGMAR = pdata;
74   }
75 }
DMA2D_SetConfig

/* Configure DMA2D data size */

tmp = Width << 16;
hdma2d->Instance->NLR = (Height | tmp);

/* Configure DMA2D destination address */
hdma2d->Instance->OMAR = DstAddress;

/* Configure DMA2D source address */

hdma2d->Instance->FGMAR = pdata;

这里设置两边memory的地址与行数也就是数据量

DMA2D_NLR 与DMA2D_OMAR 前面一章介绍过

整个初始化流程结束，主要设置了output，源地址是FG

最后设置传输：

  1 /**
  2   * @brief  Polling for transfer complete or CLUT loading.
  3   * @param  hdma2d: pointer to a DMA2D_HandleTypeDef structure that contains
  4   *                 the configuration information for the DMA2D. 
  5   * @param  Timeout: Timeout duration
  6   * @retval HAL status
  7   */
  8 HAL_StatusTypeDef HAL_DMA2D_PollForTransfer(DMA2D_HandleTypeDef *hdma2d, uint32_t Timeout)
  9 {
 10   uint32_t tmp, tmp1;
 11   uint32_t tickstart = 0;
 12 
 13   /* Polling for DMA2D transfer */
 14   if((hdma2d->Instance->CR & DMA2D_CR_START) != 0)
 15   {
 16    /* Get tick */
 17    tickstart = HAL_GetTick();
 18 
 19     while(__HAL_DMA2D_GET_FLAG(hdma2d, DMA2D_FLAG_TC) == RESET)
 20     {
 21       tmp  = __HAL_DMA2D_GET_FLAG(hdma2d, DMA2D_FLAG_CE);
 22       tmp1 = __HAL_DMA2D_GET_FLAG(hdma2d, DMA2D_FLAG_TE);
 23 
 24       if((tmp != RESET) || (tmp1 != RESET))
 25       {
 26         /* Clear the transfer and configuration error flags */
 27         __HAL_DMA2D_CLEAR_FLAG(hdma2d, DMA2D_FLAG_CE);
 28         __HAL_DMA2D_CLEAR_FLAG(hdma2d, DMA2D_FLAG_TE);
 29 
 30         /* Change DMA2D state */
 31         hdma2d->State= HAL_DMA2D_STATE_ERROR;
 32 
 33         /* Process unlocked */
 34         __HAL_UNLOCK(hdma2d);
 35         
 36         return HAL_ERROR;
 37       }
 38       /* Check for the Timeout */
 39       if(Timeout != HAL_MAX_DELAY)
 40       {
 41         if((Timeout == 0)||((HAL_GetTick() - tickstart ) > Timeout))
 42         {
 43           /* Process unlocked */
 44           __HAL_UNLOCK(hdma2d);
 45         
 46           /* Update error code */
 47           hdma2d->ErrorCode |= HAL_DMA2D_ERROR_TIMEOUT;
 48 
 49           /* Change the DMA2D state */
 50           hdma2d->State= HAL_DMA2D_STATE_TIMEOUT;
 51           
 52           return HAL_TIMEOUT;
 53         }
 54       }        
 55     }
 56   }
 57   /* Polling for CLUT loading */
 58   if((hdma2d->Instance->FGPFCCR & DMA2D_FGPFCCR_START) != 0)
 59   {
 60     /* Get tick */
 61     tickstart = HAL_GetTick();
 62    
 63     while(__HAL_DMA2D_GET_FLAG(hdma2d, DMA2D_FLAG_CTC) == RESET)
 64     {
 65       if((__HAL_DMA2D_GET_FLAG(hdma2d, DMA2D_FLAG_CAE) != RESET))
 66       {      
 67         /* Clear the transfer and configuration error flags */
 68         __HAL_DMA2D_CLEAR_FLAG(hdma2d, DMA2D_FLAG_CAE);
 69         
 70         /* Change DMA2D state */
 71         hdma2d->State= HAL_DMA2D_STATE_ERROR;
 72         
 73         return HAL_ERROR;      
 74       }      
 75       /* Check for the Timeout */
 76       if(Timeout != HAL_MAX_DELAY)
 77       {
 78         if((Timeout == 0)||((HAL_GetTick() - tickstart ) > Timeout))
 79         {
 80           /* Update error code */
 81           hdma2d->ErrorCode |= HAL_DMA2D_ERROR_TIMEOUT;
 82     
 83           /* Change the DMA2D state */
 84           hdma2d->State= HAL_DMA2D_STATE_TIMEOUT;
 85           
 86           return HAL_TIMEOUT;
 87         }
 88       }      
 89     }
 90   }
 91   /* Clear the transfer complete flag */
 92   __HAL_DMA2D_CLEAR_FLAG(hdma2d, DMA2D_FLAG_TC);
 93   
 94   /* Clear the CLUT loading flag */
 95   __HAL_DMA2D_CLEAR_FLAG(hdma2d, DMA2D_FLAG_CTC);  
 96   
 97   /* Change DMA2D state */
 98   hdma2d->State = HAL_DMA2D_STATE_READY;
 99   
100   /* Process unlocked */
101   __HAL_UNLOCK(hdma2d);
102   
103   return HAL_OK;
104 }
HAL_DMA2D_PollForTransfer

#define DMA2D_FLAG_CE                     DMA2D_ISR_CEIF /*!< Configuration Error Interrupt Flag */
#define DMA2D_FLAG_CTC                   DMA2D_ISR_CTCIF /*!< C-LUT Transfer Complete Interrupt Flag */
#define DMA2D_FLAG_CAE                   DMA2D_ISR_CAEIF /*!< C-LUT Access Error Interrupt Flag */
#define DMA2D_FLAG_TW                    DMA2D_ISR_TWIF /*!< Transfer Watermark Interrupt Flag */
#define DMA2D_FLAG_TC                     DMA2D_ISR_TCIF /*!< Transfer Complete Interrupt Flag */
#define DMA2D_FLAG_TE                     DMA2D_ISR_TEIF /*!< Transfer Error Interrupt Flag */

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原文地址：https://www.cnblogs.com/wwjdwy/p/4604820.html