2020-01-15 10:12 PM
Hi at all,
we want to use Touch GFX for our display project. Actually we use a display with rgb interface.
Now i have seen, that the newer STM32 boards with F469 and F769 are using a DSI (MIPI) interface to the display and it is always the 4" 800x480 mounted.
Touch GFX supports these boards with demo projects. Now i want to know:
1) We want to use a 5" display and these with DSI. These types use a resolution of 1280x720.
Is it possible to reconfigure the demo project, that it will work with it?
2) What must be reconfigured in the demo project?
Thanks,
Korbinian
2020-01-16 12:41 AM
Hi @KGlei.1,
1) Depending on what you want to do, and the bitdepth of your application, you'll find any DSI-capable MCU from ST having a hard time with that many pixels. 800x480 is a stretch as it is now, even for an F769 using full screen transitions in 24bpp. So consider that.
2) You'll need to configure the LTDC+DSI HOST a bit differently, and configure the TouchGFX HAL slightly different as well since the drivers we use are, as you say, for 800x480. It's a matter of splitting the framebuffer into sections that are transferred one at a time until the entire framebuffer is sent.
The TouchGFX DSI driver itself will probably work as it is with your new display.
Let me know when you get closer.
/Martin