DOIT Devkit V1.0 + TFT 3.5 Touch (ILI9488) about touch interface can't calibrate. How to fix it? about lovyangfx HOT 6 CLOSED

@BlynkGO
If it is working correctly with LolinD32Pro, it is unlikely to be a hardware failure or a library failure.
As far as the symptoms are concerned, it is always misidentified as being touched.
Perhaps it is not receiving data from XPT2046.

First, check the wiring.

touch.spi_cs = 27;
static constexpr int spi_miso = 19;

I can't verify that this matches the actual connection.
You may want to try using a different GPIO just to be sure.

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pinout numbering differs between ESP32-Wrover and ESP32-Wroom, it's very likely the Touch config needs to be changed

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@BlynkGO
Hmmm, there is no cause I can think of right now.
The superficial appearance of the phenomenon means that it is always misinterpreted as being touched, but we need more in-depth information.
If you have an oscilloscope, observing the waveform might tell you something.

I can't reproduce the phenomenon with what I have, so I'm relying on your debugging.

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@lovyan03 @tobozo
Thanks for the reply and guidance.

When I tested hareware DOIT Devkit + TFT 3.5 by TFT_eSPI library
that configed the same pins (18,19,23,27) as the code tested by LovyanGFX library, it is working correctly.

[Touch is fine on TFT_eSPI]
https://streamable.com/hpmzue

For me , LovyanGFX is better than TFT_eSPI,
I would like to use LovyanGFX .

The issue about lovyangfx's touch interface for DOIT Devkit maybe occurs from GPIO19 signal in library?

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Thank you very much.
I have tried to understand the LovyanGFX's touch in library code,
but I don't know how to fix.

At this point I backward to another method that
send spi_t _spi_handle[spi_host] to outside
from LovyanGFX' spi system
and create another touch library.
Now it can work.

However I feel satisfied to use the original of LovyanGFX' touch
more than this way.

If the issue can know cause and is resolved,
please update for this issue.

Arigato gozaimasu.

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closing this issue as solved, feel free to reopen if needed

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