Only set touchscreen offsets if they aren't defined

[G4Cab]

Only set touchscreen offsets if they aren't defined in the configuration.h to get rid of the nasty double definition massages

[rhapsodyv]

The default values didn't work for you?
🤔

[thisiskeithb]

After all this TFT refactoring, you shouldn't need to manually define those values anymore.

[rhapsodyv]

After all this TFT refactoring, you shouldn't need to manually define those values anymore.

In fact. Even more true for Nano v1.2. Nano v1.2 board have a FSMC interface. It means that it will be rarely changed. FSMC is connected directly to the mcu, pin by pin. It may work only with the mks tft. I thought that no user will ever change it.
So, if the defaults xpt works for one user, it must work for all ... That is the reason I kept those config without the #ifdef...

@G4Cab The default values ​​aren't working for you?

[rhapsodyv]

Anyway, this PR could be merged, as it only add the option for the user override the default Xpt values

[G4Cab]

After all this TFT refactoring, you shouldn't need to manually define those values anymore.

In fact. Even more true for Nano v1.2. Nano v1.2 board have a FSMC interface. It means that it will be rarely changed. FSMC is connected directly to the mcu, pin by pin. It may work only with the mks tft. I thought that no user will ever change it.
So, if the defaults xpt works for one user, it must work for all ... That is the reason I kept those config without the #ifdef...

@G4Cab The default values ​​aren't working for you?

Had from an older marlin this in my config and runned into massive warnings, after i understand everything i tried the default values without any luck of having the correct calibration.

After some try and error i got it working after reload factory defaults with M502 over pronterface.

thaught that this was forgotten and added the changes.