LUT color modification

[AlexisSADAL]

Hi,

I tried to modify the LUT initilisation by modifying values inside them.
But my modification doesn't changed anything on the refresh process,
I am pretty sure that the COG keep is previous LUT in memory and doen't take the new one into account.
I am working on 1inch54 3 colors (B, W, Y) and I would like to optimize the transition time even if some ghosts keep on the screen.
Is anybody try to modify LUT on this screen or another ?

Alexis

[caemor]

You just need to write to the LUT_Registers...
I haven't tried any of the colored ones yet, but for the 1.54in BW one I have some code here: https://github.com/caemor/epd-waveshare/blob/master/src/epd1in54/mod.rs#L353-L361

So you need to send a Command to the WRITE_LUT_REGISTER and then send the data (your new lut values...)

But be careful, as you can break your display (e.g. near permanent ghosting) with bad values

[AlexisSADAL]

Yes that is I am doing.
I send the command and after that the data.
And the refresh process stay the same even if I change values in my LUT data.

[waveshare]

no, you cann't