Is Calibration Required with 7 inch Touchscreen?

[G8GKQ]

I am looking to simplify the program that runs the touchscreen in the Portsdown 4, and am about to delete all the code that deals with the "touchscreen calibration" that was required for the old 3.5 inch touchscreen (the old screen that is not supported in the Portsdown 4).

Before I do this, has anybody found that calibration is required for the 7 inch touchscreen? I have never needed it on any of the 7 inch screens that I have tested.

I must emphasise that I will continue to support the 3.5 inch touchscreen (with calibration) in the Portsdown Buster 2020 build using the Raspberry Pi 3.

Dave, G8GKQ

[g4eml]

Hi Dave,

I have never needed to calibrate one.

Colin.

[M0SKM]

Me neither, works fine.

Steve

[g0mjw]

Before I do this, has anybody found that calibration is required for the 7 inch touchscreen? I have never needed it on any of the 7 inch screens that I have tested.

You can calibrate it? No never needed to.

Mike

[g8gtz]

Same as Mike never knew or needed to....

Noel

[G8GKQ]

Thanks All

That's another few hundred lines of code that I can remove!

Dave

[G7JTT]

late to the party but like others have said never needed to use it.

73 John

[keng8vdp]

I damaged 2 screens but before that no calibration required .. just a bin !
Screen 3 still not blown it up yet and thats fine also. Never needed calibration

My 2 x 7" ones are performing very nice as-is

Ken