Hey gang,LCD wiki ) and though I've gotten the screen to work, I'm having no luck with the touch screen (XPT2046).
I'm using ESP-WROOM-32 (38 pin) with TFT_eSPI library, but am open to other suggestions (as long as they're compatible with LVGL, which I plan to use after I get this problem sorted out.
In TFT_eSPI's config file User_Setup.h , I have even tried putting -1 for the TOUCH_CS pin and the calibration process still races through.
It is entirely possible I've done something wrong as I followed this tutorial as my starting point, tweaking things my specific display.
Any help would be greatly appreciated!
All the best,
Post your code, I'd like to see the pin numbers being used. Oh code in code tag thingies.
Hey Idaho,
Here are the only non-commented lines in User_Setup.h other than the default font and SPI speed settings.
#define ILI9488_DRIVER
#define TFT_MISO 19
#define TFT_MOSI 26
#define TFT_SCLK 18
#define TFT_CS 15 // Chip select control pin
#define TFT_DC 2 // Data Command control pin
#define TFT_RST 4 // Reset pin (could connect to RST pin)
#define TOUCH_CS 14
Other than that, it's the examples from Bodmer's TFT_eSPI library .
Let me know if you'd like to know anything else!
Cheers,
When I run the Touch Controller Demo sketch, it displays x:0 y:0 and doesn't respond to touch.
When I run the Test Touch Controller sketch, the serial monitor shows stuff like this when I'm touching the screen:
21:55:53.028 -> x: 162 y: 4095 z: 4070
21:55:53.263 -> x: 173 y: 4095 z: 4059
21:55:53.499 -> x: 155 y: 4095 z: 4026
21:55:53.779 -> x: 160 y: 4095 z: 4048
21:55:54.012 -> x: 130 y: 4095 z: 4078
21:55:54.246 -> x: 183 y: 4095 z: 4032
21:55:54.527 -> x: 147 y: 4095 z: 4024
21:55:54.762 -> x: 3920 y: 559 z: 3928
21:55:54.995 -> x: 3951 y: 589 z: 3957
21:55:55.275 -> x: 158 y: 4095 z: 4046
21:55:55.508 -> x: 3824 y: 967 z: 3852
21:55:55.741 -> x: 3807 y: 938 z: 3840
21:55:56.023 -> x: 3758 y: 1038 z: 3835
21:55:56.257 -> x: 124 y: 4095 z: 4119
21:55:56.490 -> x: 3519 y: 2739 z: 3797
21:55:56.771 -> x: 3880 y: 2319 z: 3877
21:55:57.004 -> x: 3960 y: 1181 z: 3924
21:55:57.239 -> x: 3415 y: 652 z: 3835
21:55:57.522 -> x: 4002 y: 362 z: 3945
21:55:57.758 -> x: 3806 y: 628 z: 3827
21:55:57.994 -> x: 144 y: 4095 z: 4057
21:55:58.277 -> x: 3984 y: 2169 z: 4002
21:55:58.512 -> x: 137 y: 4095 z: 4038
21:55:58.746 -> x: 4017 y: 2548 z: 3988
21:55:59.027 -> x: 3967 y: 1392 z: 3935
21:55:59.261 -> x: 141 y: 4095 z: 3992
21:55:59.497 -> x: 272 y: 4095 z: 4050
21:55:59.780 -> x: 141 y: 4095 z: 4029
21:56:00.013 -> x: 146 y: 4095 z: 4024
21:56:00.247 -> x: 137 y: 4095 z: 4024
And this when I'm not touching the screen:
21:56:31.010 -> x: 178 y: 4095 z: 4061
21:56:31.244 -> x: 181 y: 4095 z: 4001
21:56:31.526 -> x: 138 y: 4095 z: 4083
21:56:31.762 -> x: 174 y: 4095 z: 4045
21:56:31.998 -> x: 151 y: 4095 z: 4048
21:56:32.281 -> x: 133 y: 4095 z: 4086
21:56:32.519 -> x: 163 y: 4095 z: 4036
21:56:32.755 -> x: 157 y: 4095 z: 4047
21:56:32.988 -> x: 176 y: 4095 z: 4047
21:56:33.272 -> x: 155 y: 4095 z: 4051
21:56:33.508 -> x: 151 y: 4095 z: 4055
21:56:33.742 -> x: 177 y: 4095 z: 4058
21:56:34.023 -> x: 164 y: 4095 z: 4048
21:56:34.257 -> x: 140 y: 4095 z: 4050
21:56:34.489 -> x: 150 y: 4095 z: 4049
21:56:34.771 -> x: 156 y: 4095 z: 4043
21:56:35.006 -> x: 155 y: 4095 z: 4051
21:56:35.240 -> x: 169 y: 4095 z: 4081
21:56:35.523 -> x: 160 y: 4095 z: 4052
21:56:35.759 -> x: 138 y: 4095 z: 4035
21:56:35.996 -> x: 166 y: 4095 z: 4047
21:56:36.279 -> x: 142 y: 4095 z: 4056
Turns out to be something a little odd. I had been using non-standard SPI pins and, when testing something else, I used the default pins (18,19,23) and the touchscreen now worked.
I have raised a possible bug with the library's developer here: Touchscreen SPI seems hardcoded (ESP32) · Issue #1431 · Bodmer/TFT_eSPI · GitHub
system
May 17, 2022, 12:37am
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