DMA2D配置

1.DMA2D参数配置：

void BSP_DMA2D_Init(void)
{
    RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_DMA2D,ENABLE);
}
void BSP_DMA2D_Line_Layer1(uint32_t BSP_Position_X,uint32_t BSP_Position_Y,uint32_t BSP_Line_Width,uint32_t BSP_Line_Height,uint32_t BSP_Line_K,uint32_t BSP_Line_Color)
{
    DMA2D_DeInit();
    DMA2D_InitTypeDef DMA2D_InitStruct;
    DMA2D_InitStruct.DMA2D_Mode = DMA2D_R2M;//寄存器到显存模式
    DMA2D_InitStruct.DMA2D_CMode = DMA2D_ARGB8888;
    DMA2D_InitStruct.DMA2D_OutputBlue  = (BSP_Line_Color>>0)&0x000000FF;
    DMA2D_InitStruct.DMA2D_OutputGreen = (BSP_Line_Color>>8)&0x000000FF;
    DMA2D_InitStruct.DMA2D_OutputRed   = (BSP_Line_Color>>16)&0x000000FF;
    DMA2D_InitStruct.DMA2D_OutputAlpha = (BSP_Line_Color>>24)&0x000000FF;
    DMA2D_InitStruct.DMA2D_OutputMemoryAdd = LCD_LAYER1_Buffer_Adderess + (LCD_PIXEL_WIDTH * 4 * BSP_Position_Y) + (BSP_Position_X*4); //layer2 显存地址
    DMA2D_InitStruct.DMA2D_OutputOffset = LCD_PIXEL_WIDTH - BSP_Line_Width + BSP_Line_K; //偏移量 本行末尾 到 下一行开始 的像素数量
    DMA2D_InitStruct.DMA2D_NumberOfLine = BSP_Line_Height;
    DMA2D_InitStruct.DMA2D_PixelPerLine = BSP_Line_Width;
    DMA2D_Init(&DMA2D_InitStruct);
    DMA2D_StartTransfer();
    while(DMA2D_GetFlagStatus(DMA2D_FLAG_TC) != SET);
}


void BSP_DMA2D_Line_Layer2(uint32_t BSP_Position_X,uint32_t BSP_Position_Y,uint32_t BSP_Line_Width,uint32_t BSP_Line_Height,uint32_t BSP_Line_K,uint32_t BSP_Line_Color)
{
    DMA2D_DeInit();
    DMA2D_InitTypeDef DMA2D_InitStruct;
    DMA2D_InitStruct.DMA2D_Mode = DMA2D_R2M;//寄存器到显存模式
    DMA2D_InitStruct.DMA2D_CMode = DMA2D_ARGB8888;
    DMA2D_InitStruct.DMA2D_OutputBlue  = (BSP_Line_Color>>0)&0x000000FF;
    DMA2D_InitStruct.DMA2D_OutputGreen = (BSP_Line_Color>>8)&0x000000FF;
    DMA2D_InitStruct.DMA2D_OutputRed   = (BSP_Line_Color>>16)&0x000000FF;
    DMA2D_InitStruct.DMA2D_OutputAlpha = (BSP_Line_Color>>24)&0x000000FF;
    DMA2D_InitStruct.DMA2D_OutputMemoryAdd = LCD_LAYER2_Buffer_Adderess + (LCD_PIXEL_WIDTH * 4 * BSP_Position_Y) + (BSP_Position_X*4); //layer2 显存地址
    DMA2D_InitStruct.DMA2D_OutputOffset = LCD_PIXEL_WIDTH - BSP_Line_Width + BSP_Line_K; //偏移量 本行末尾 到 下一行开始 的像素数量
    DMA2D_InitStruct.DMA2D_NumberOfLine = BSP_Line_Height;
    DMA2D_InitStruct.DMA2D_PixelPerLine = BSP_Line_Width;
    DMA2D_Init(&DMA2D_InitStruct);
    DMA2D_StartTransfer();
    while(DMA2D_GetFlagStatus(DMA2D_FLAG_TC) != SET);
}

2.清屏函数：

void BSP_Clear_Layer1(void)
{
    uint16_t i,j;
    uint32_t *p = (uint32_t *)LCD_LAYER1_Buffer_Adderess;
    for(j=0;j<480;j++)
    {
        for(i=0;i<800;i++)
        {
            *p = BLACK;
            p++;
        }
    
    }
}
void BSP_Clear_Layer2(void)
{
    uint16_t i,j;
    uint32_t *p = (uint32_t *)LCD_LAYER2_Buffer_Adderess;
    
    
    for(j=0;j<480;j++)
    for(i=0;i<800;i++)
        {
            *p = 0xFF000000;
            p++;
        }
  
    
}

3.测试函数

void BSP_LCD_DisplayTest(void)
{
      BSP_Clear_Layer1();
      BSP_Clear_Layer2();
      BSP_DMA2D_Line_Layer2(200,200,20,50,0,YELLOW);
      BSP_DMA2D_Line_Layer2(0,0,50,50,0,WHITE);
      BSP_DMA2D_Line_Layer2(50,50,5,200,0,BLUE);
      BSP_DMA2D_Line_Layer2(200,100,200,5,0,RED);
}

4.测试结果

？改变参数多次调用DMA2D_Init()出现错误

* 初始化前调用DMA2D_DeInit()

? 传递#define的地址出错

* #define的地址是两数相加，应带上括号避免出错