Diagnose whether this controller is supported
There are FAQs in extras/mcufriend_how_to.txt

tft.readID() finds: ID = 0x6809

MCUFRIEND_kbv version: 2.9.9


PORTRAIT is 240 x 320

Run the examples/graphictest_kbv sketch
All colours, text, directions, rotations, scrolls
should work.  If there is a problem,  make notes on paper
Post accurate description of problem to Forum
Or post a link to a video (or photos)

I rely on good information from remote users


Making all control and bus pins INPUT_PULLUP
Typical 30k Analog pullup with corresponding pin
would read low when digital is written LOW
e.g. reads ~25 for 300R X direction
e.g. reads ~30 for 500R Y direction

Testing : (A1, D7) = 23
Testing : (A2, D6) = 39
Diagnosing as:-
XM,XP:  (A1, D7) = 23
YP,YM:  (A2, D6) = 39

ILI9341 Test!
Display Power Mode: 0x0
MADCTL Mode: 0x0
Pixel Format: 0x0
Image Format: 0x0
Self Diagnostic: 0x0
Benchmark                Time (microseconds)
Screen fill              1496884
Text                     175012
Lines                    1435608
Horiz/Vert Lines         127044
Rectangles (outline)     83792
Rectangles (filled)      3107140
Circles (filled)         498768
Circles (outline)        613888
Triangles (outline)      316496
Triangles (filled)       1358164
Rounded rects (outline)  242988
Rounded rects (filled)   3134828
Done!