STM32F479 datasheet(41/91 Pages) STMICROELECTRONICS

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AN4861

Creating a graphical application with LTDC

4.4

LTDC synchronization with DMA2D and CPU

4.4.1

DMA2D usage

The DMA2D is a master on the AHB bus matrix performing graphical data transfers inter-

memories. It is recommended to use the DMA2D in order to offload the CPU.

The DMA2D implements four basic tasks:

•

Fill a rectangular shape with a unique color.

•

Copy a frame or a rectangular part of a frame from a memory to another.

•

Convert the pixel format of a frame or a rectangular part of a frame while transferring it

from one memory to another memory.

•

Blend two images with different sizes and pixel format and store the resulting image in

one resulting memory.

STM32F7x8(2)

STM32F7x9(2)

1. Gray cells with “NA” = the package is not available for that specific product.

Cells with “18” value = only RGB565 and RGB666 parallel outputs are supported.

Cells with “24” value = all of RGB565, RGB666 and RGB888 outputs are supported.

2. The integrated MIPI-DSI controller allows easier PCB design with fewer pins, for more details on STM32's

MIPI-DSI host refer to application note AN4860.

Table 13. STM32 packages with LTDC peripheral versus

RGB interface availability(1) (continued)

Product

STM32F479 Datasheet(PDF) 41 Page - STMicroelectronics