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STM32F429 DMA2D bilinear bitmap resize 2015-05-15

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Alessandro

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Alessandro submitted a new article:

STM32F429 DMA2D bilinear bitmap resize/ STM32 hardware-based bilinear bitmap resize.

STM32F42x/43x have a built in graphic accelerator intended to fill copy or blend bitmap image: the DMA2D.

I wrote a short DMA2D example to resize a bitmap using bilinear interpolation.
The resize process is entirely handled using the DMA2D Blender with a low CPU resource usage.
The CPU usage, after a fast initial setup, is limited to cyclic update some DMA2D registers in response to the DMA2D Irq request.

A short video showing the resize process on the STM32F429 Discovery Board:...
Click to expand...

https://www.electro-tech-online.com/articles/stm32f429-dma2d-bilinear-bitmap-resize.735/
 
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