使用野火的429开发板，实测《21-LTDC—液晶显示汉字（显示任意大小）》的例程，发现双层显示使用的都是ARGB1555格式，如果都换成RGB565，或者一层是ARGB15555另外一层使用RGB565，则屏幕都会闪烁。
求解，谢谢！
void LCD_LayerInit(void)
{
LTDC_Layer_InitTypeDef LTDC_Layer_InitStruct;
/* 层窗口配置 */
/* 配置本层的窗口边界，注意这些参数是包含HBP HSW VBP VSW的 */
//一行的第一个起始像素，该成员值应用为 (LTDC_InitStruct.LTDC_AccumulatedHBP+1)的值
LTDC_Layer_InitStruct.LTDC_HorizontalStart = HBP + HSW;
//一行的最后一个像素，该成员值应用为 (LTDC_InitStruct.LTDC_AccumulatedActiveW)的值
LTDC_Layer_InitStruct.LTDC_HorizontalStop = HSW+HBP+LCD_PIXEL_WIDTH-1;
//一列的第一个起始像素，该成员值应用为 (LTDC_InitStruct.LTDC_AccumulatedVBP+1)的值
LTDC_Layer_InitStruct.LTDC_VerticalStart = VBP + VSW;
//一列的最后一个像素，该成员值应用为 (LTDC_InitStruct.LTDC_AccumulatedActiveH)的值
LTDC_Layer_InitStruct.LTDC_VerticalStop = VSW+VBP+LCD_PIXEL_HEIGHT-1;
/* Pixel Format configuration*/
LTDC_Layer_InitStruct.LTDC_PixelFormat = LTDC_Pixelformat_RGB565;
/* Alpha constant (255 totally opaque) */
LTDC_Layer_InitStruct.LTDC_ConstantAlpha = 255;
/* Default Color configuration (configure A,R,G,B component values) */
LTDC_Layer_InitStruct.LTDC_DefaultColorBlue = 0;
LTDC_Layer_InitStruct.LTDC_DefaultColorGreen = 0;
LTDC_Layer_InitStruct.LTDC_DefaultColorRed = 0;
LTDC_Layer_InitStruct.LTDC_DefaultColorAlpha = 0;
/* Configure blending factors */
LTDC_Layer_InitStruct.LTDC_BlendingFactor_1 = LTDC_BlendingFactor1_CA;
LTDC_Layer_InitStruct.LTDC_BlendingFactor_2 = LTDC_BlendingFactor2_CA;
/* the length of one line of pixels in bytes + 3 then :
Line Lenth = Active high width x number of bytes per pixel + 3
Active high width = LCD_PIXEL_WIDTH
number of bytes per pixel = 2 (pixel_format : RGB565)
*/
LTDC_Layer_InitStruct.LTDC_CFBLineLength = ((LCD_PIXEL_WIDTH * 2) + 3);
/* the pitch is the increment from the start of one line of pixels to the
start of the next line in bytes, then :
Pitch = Active high width x number of bytes per pixel */
LTDC_Layer_InitStruct.LTDC_CFBPitch = (LCD_PIXEL_WIDTH * 2);
/* Configure the number of lines */
LTDC_Layer_InitStruct.LTDC_CFBLineNumber = LCD_PIXEL_HEIGHT;
/* Start Address configuration : the LCD Frame buffer is defined on SDRAM */
LTDC_Layer_InitStruct.LTDC_CFBStartAdress = LCD_FRAME_BUFFER;
/* Initialize LTDC layer 1 */
LTDC_LayerInit(LTDC_Layer1, <DC_Layer_InitStruct);
/* Configure Layer2 */
/* Pixel Format configuration*/
LTDC_Layer_InitStruct.LTDC_PixelFormat = LTDC_Pixelformat_ARGB1555;
/* Start Address configuration : the LCD Frame buffer is defined on SDRAM w/ Offset */
LTDC_Layer_InitStruct.LTDC_CFBStartAdress = LCD_FRAME_BUFFER + BUFFER_OFFSET;
/* Configure blending factors */
LTDC_Layer_InitStruct.LTDC_BlendingFactor_1 = LTDC_BlendingFactor1_PAxCA;
LTDC_Layer_InitStruct.LTDC_BlendingFactor_2 = LTDC_BlendingFactor2_PAxCA;
/* Initialize LTDC layer 2 */
LTDC_LayerInit(LTDC_Layer2, <DC_Layer_InitStruct);
/* LTDC configuration reload */
LTDC_ReloadConfig(LTDC_IMReload);
/* Enable foreground & background Layers */
LTDC_LayerCmd(LTDC_Layer1, ENABLE);
LTDC_LayerCmd(LTDC_Layer2, ENABLE);
/* LTDC configuration reload */
LTDC_ReloadConfig(LTDC_IMReload);
/* Set default font */
LCD_SetFont(&LCD_DEFAULT_FONT);
/* dithering activation */
LTDC_DitherCmd(ENABLE);
} |
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