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Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
@allObjects
There is just not enough memory available in a regular Espruino envrironment to double the memory the ILI9341 has: 172KB. And that would be needed twice to make a dive and push out changed regions... In other words, this is way beyond the flip-operation-mode resources.
When working on ILI9341 driven displays, the main issue was to have overlay and recreate the are. I resorted to backup the display controller's memory, used the backed up area for some pop-up kind of thing, and then restore the area (see post ). Alternative is redrawing the whole screen if the area is 40+%. The modular UI code I have is enabling this function already. But as everything it is not really snappy. Snappy it would become when using 8..16 parallel data, but that's not really an option, since are talking SPI.