2.8" PiTFT inverse touch points

[mikeysklar]

Script Command

sudo -E env PATH=$PATH python3 adafruit-pitft.py --display=28c --rotation=90 --install-type=mirror

sudo -E env PATH=$PATH python3 adafruit-pitft.py --display=28r --rotation=90 --install-type=mirror

Operating System

PiOS Bookworm
Desktop
64-bit

Hardware

Raspberry Pi 4B

• 2.8" PiTFT (resistive)
• 2.8" PiTFT (capacitive)

Behavior

inverted x,y coordinates on touchscreen for both models of display.

Description

adafruit-pitft.py brings up a visually correct X11 session, but the touch points are inverted. Bottom right corner touch results in top left corner touch. This was shown to happen on both capacitive and resistive 2.8" PiTFTs. The workaround is to change invert x,y at the config.txt level.

touch-invx,touch-invy

capacitive

dtoverlay=pitft28-capacitive,rotate=90,speed=64000000,fps=30,touch-invx,touch-invy,drm

dtoverlay=pitft28-resistive,rotate=90,speed=64000000,fps=30,touch-invx,touch-invy,drm

This had been working and I'm not sure when it stopped.

forum issue

Additional information

No response