Problem reading touchscreen axis using RGB888

[DPutr.1]

I'm using a custom board stm32f469IIT , using a PS043BWSA03 LCD (RGB888) using the touchgfx library and STM32touchcontroller (LTDC RGB565). there is a problem when reading the touchscreen axis (example in photo). is there a solution?

[MM..1]

Show XY nums on display or debuger, then you see if error is your code or...

[Osman SOYKURT]

Hello DPutr.1,

Did you try to run your project on simulator ? If it's working fine on simulator, I'd think the issue is from your board. y first guess would be it doesn't send enough or on the contrary too much bytes and that cause the gap between the position you touch the screen and the position the board interprets the touch.

So try to run your project on simulator first, then check your screen and touch controller configuration and try @MM..1​ solution.

/Osman

[DPutr.1]

thanks for the information, I've tried on the simulator and tried to output the axis value data. here is an example, there is a jump in the value of the axis after I check. on testing point 1 the first image of the axis read is correct but on testing at point 2 there is a jump in value(see photo)

[DPutr.1]

sorry i forgot to give a description, the displayed value is x,y

[DPutr.1]

After I checked all the screens, here's the part that's the problem. does converting from RGB888(LCD) to RGB565(.ioc) have any effect?

[MM..1]

Touchcontroller driver code how from where ? And No - color mode on LCD isnt relevant to touch .

[DPutr.1]

I got it from STM32469I Discovery BSP Driver version number V2.0.1

[MM..1]

FT6X06 ? Your display use same ? If not you need rewrite or write custom driver ...

[DPutr.1]

yes I do not use the lcd I use the PS043BWSA03 LCD (RGB888) . how can i make a custom driver? is there an example or documentation? Thank you in advance