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STM32F469 bảng dữ liệu(PDF) 45 Page - STMicroelectronics

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Giải thích chi tiết về linh kiện  LCD-TFT display controller (LTDC) on STM32 MCUs
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STM32F469 bảng dữ liệu(HTML) 45 Page - STMicroelectronics

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AN4861
Creating a graphical application with LTDC
89
pLayerCfg.PixelFormat = LTDC_PIXEL_FORMAT_RGB888;
pLayerCfg.Alpha = 255;
pLayerCfg.Alpha0 = 0;
pLayerCfg.BlendingFactor1 = LTDC_BLENDING_FACTOR1_PAxCA;
pLayerCfg.BlendingFactor2 = LTDC_BLENDING_FACTOR1_PAxCA;
/* Framebuffer start address: LTDC fetches the image directly from internal
Flash the real image width is 448 pixels. Only the 448 pixels width is
displayed*/
pLayerCfg.FBStartAdress = (uint32_t)&image_data_Image_RGB888_448x272;
pLayerCfg.ImageWidth = 448;
pLayerCfg.ImageHeight = 272;
pLayerCfg.Backcolor.Blue = 0;
pLayerCfg.Backcolor.Green = 0;
pLayerCfg.Backcolor.Red = 0;
if (HAL_LTDC_ConfigLayer(&hltdc, &pLayerCfg, 0) != HAL_OK)
{
Error_Handler();
}
Figure 26. Reducing layer window and framebuffer line widths
•
Add a number of dummy bytes at the end of every line of pixels to match the closest
frame line width multiple of 64 bytes. This can be done using the LTDC layer pitch (see
Section 3.3: Two programmable LTDC layers). To do this, the user must consider the
two points below:
–
The framebuffer should contain the dummy bytes (as described in Figure 27):
when writing data into the framebuffer, it can be done by programming an output



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