[3.5b1] how to wire and configure ILI9488 displays
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Since RepPanel has gone closed source I had little hope of getting my RepPanel v1 displays updated to a stable and usable state, so two ILI9488 displays were sitting in storage for better times ....
It seems better times have arrived for me now, since 3.5 seems to have [support for direct-attach ILI9488 displays](https://docs.duet3d.com/en/User_manual/Reference/Gcodes#m918-configure-direct-connect-display] (M918 P3 parameter).
What's missing is documentation on how to wire these up (nothing on Connecting 12864 and other displays), and whether they need 12864 style menu configuration. Can anyone help out with that?
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@oliof the work on supporting those displays is not yet complete. In particular, the code to allow values to be changed when an item such as desired temperature is touched has not been written yet.
In order to achieve a satisfactory speed, these displays need a dedicated high speed (15MHz) SPI channel to drive the LCD. The touch screen interface needs another SPI channel, but the standard shared SPI channel would probably suffice for that.
