T4.1 + ILI9431_t3 (2.4" display): inverted colors

[XFer]

SOLVED:
Had to add

tft.invertDisplay(false);

which is so very strange!
I mean: if I do not add the instruction at all, I get inverted colors.
If I add the instruction with "true" as argument, I get inverted colors.
If I add the instruction with "false" as argument, which to me it would mean "do not invert colors", I get right colors!

Leaving the original message for reference.

Fernando


Hello,
just received a new 2.4" TFT display with integrated touchscreen, for a project based upon Teensy 4.1.

It appears identical as this one, also same labels etc.
https://www.pjrc.com/store/display_ili9341_touch.html

I wired it following the table at:
https://www.pjrc.com/store/display_ili9341_touch.html

and tried the sample sketch "ILI9341_t3 -> graphictest" as is, without any modification (so no need to copy/paste the code I'd say).

Arduino IDE is 1.8.19 and TeensyDuino is 1.57.

Problems is, I get inverted colors: "black" is actually white, "yellow" shows as blue, "green" as magenta, and so on.

The sample sketch prints a few diagnostic infos on the serial monitor:

Display Power Mode: 0xDC
MADCTL Mode: 0x48
Pixel Format: 0x5
Image Format: 0x20
Self Diagnostic: 0x0
Benchmark                Time (microseconds)
Screen fill              205514
Text                     9641
Proportional Text        10017
Lines                    72369
Horiz/Vert Lines         17478
Rectangles (outline)     11218
Rectangles (filled)      422184
Circles (filled)         68060
Circles (outline)        50179
Triangles (outline)      17078
Triangles (filled)       146560
Rounded rects (outline)  18121
Rounded rects (filled)   468338
Done!

I would guess the pixel format is wrong, any idea how to fix it?
Any way to invert colors in the code?

I tried

tft.invertDisplay(true);

without any effect (exactly same inverted colors).

Tests show just fine on the screen (lines, strings, squares etc.), only... with inverted colors.

Many thanks,
Fernando