This is what Serial Terminal output should look like.
Note that Blue ILI9481 non-Mcufriend shields often do not have a Touch Panel.
I show an example where a Panel has Y but no X.
good diagnose_TouchPins:
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 : (A2, D8) = 25
Testing : (A3, D9) = 37
Diagnosing as:-
XM,XP: (A2, D8) = 25
YP,YM: (A3, D9) = 37
good TouchScreeen_Calibr_native:
TouchScreen.h GFX Calibration
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) = 31
Testing : (A2, D6) = 23
Diagnosing as:-
YP,YM: (A1, D7) = 31
XM,XP: (A2, D6) = 23
ID = 0x154
cx=863 cy=936 cz=473 LEFT, TOP, Pressure
cx=870 cy=559 cz=567 LEFT, MIDH, Pressure
cx=860 cy=183 cz=651 LEFT, BOT, Pressure
cx=506 cy=939 cz=326 MIDW, TOP, Pressure
cx=521 cy=184 cz=622 MIDW, BOT, Pressure
cx=209 cy=926 cz=249 RT, TOP, Pressure
cx=177 cy=567 cz=441 RT, MIDH, Pressure
cx=173 cy=181 cz=587 RT, BOT, Pressure
MCUFRIEND_kbv ID=0x0154 240 x 320
const int XP=6,XM=A2,YP=A1,YM=7; //240x320 ID=0x0154
const int TS_LEFT=894,TS_RT=155,TS_TOP=958,TS_BOT=156;
PORTRAIT CALIBRATION 240 x 320
x = map(p.x, LEFT=894, RT=155, 0, 240)
y = map(p.y, TOP=958, BOT=156, 0, 320)
Touch Pin Wiring XP=6 XM=A2 YP=A1 YM=7
LANDSCAPE CALIBRATION 320 x 240
x = map(p.y, LEFT=958, RT=156, 0, 320)
y = map(p.x, TOP=155, BOT=894, 0, 240)
Bad diagnose_TouchPins:
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) = 31
Bad TouchScreen_Calibr_native:
TouchScreen.h GFX Calibration
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) = 36
BROKEN TOUCHSCREEN
ID = 0x9341
You said that you owned a DMM. Did you try measuring resistance between A1 and D7 or A1 and D9 ?
David.