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Touchscreen linearity on STM32F469 issue

Question asked by Hancock.Jerry on Dec 11, 2016
Latest reply on Dec 22, 2016 by Hancock.Jerry

After spending a lot of time with an STM32F469 discovery board I found that the touch screen doesn't have good linearity at all.  You can't draw a straight line across the screen.  If you for instance, start on the left drawing across even with a ruler, the resulting trace goes about half way across and then dips several millimeters and comes back up.  The resulting trace looks like the side view of a spoon.  I know these boards are cheap but I haven't seen anything like this with others.  Has anyone else had this experience?  I would hate to have to go thru the hassle of returning it as I doubt Mouser would take it back.