Using STM32F469i Discovery Board in Minimal Display Resource Mode

[RMcIn]

I am developing on the STM32F469i  Discovery Board for a design that will have no DRAM.

I need to write to the display using minimal SRAM or, better yet, write directly to the display controller. Is it possible to write bytes directly to the board or to define a small "scratchpad" SRAM area and sequentially write sections of the display without losing previously written segments? Is there an example project showing how this might be done?

[Tesla DeLorean]

Does the display's controller indicate that's a viable method? Normally paints from a rather large frame buffer via DSI, as I recall.

[Tesla DeLorean]

https://www.st.com/content/ccc/resource/technical/document/application_note/group0/25/ca/f9/b4/ae/fc/4e/1e/DM00287603/files/DM00287603.pdf/jcr:content/translations/en.DM00287603.pdf

The controller looks to have it's own memory, I think you can write commands/data over the DSI link. Review how the BSP code configures the registers.

http://orientdisplay.com/pdf/OTM8009A.pdf

The display/touch part# is KM-040TMP-02-A

The demos I think take a minimum of 768KB

This is the display on the F746

https://cache.nxp.com/docs/en/supporting-information/RK043FN02H-CT.pdf

[RMcIn]

Thanks.

I will take a look.