It can be used to add Psram, there are some mods out there, as too why they didnt use it, who knows

Hi.
What was exactly the error that you get?
Search for this setting in the user_setup.h file and uncomment the corresponding lines:
#define ST7789_DRIVER (and comment the other driver)
#define TFT_RGB_ORDER TFT_BGR
#define TFT_INVERSION_OFF

I hope this helps.
Regards,
Sara

I used a CYD2USB. You can see my error above on March 30, 2026. Mine used a ILI9341.
In ESPHome, I needed to add parameters to make it work. Maybe these will help somebody else. If you find where to make these changes in Arduino IDE, please let me know.
invert_colors: false
spi_mode: MODE3
data_rate: 40MHz
color_order: bgr
color_palette: 8BIT
swap_xy: true

What do you change in the user_setup.h file? I tried the code unmodified for my CYD2USB, (the Github nickname for the CYD with Micro and USB-C) and got an error that was never resolved. I ended up using ESPHome for programming, but i may need to program my second CYD2USB in Arduino iDE.

Hi.
Our examples use the ILI9341. However, they are still compatible with the ST7796 if you change the driver in the user_setup.h file.
Just make sure it uses resistive touchscreen to be compatible with our examples.
Regards,
Sara

Hi.

In the instructions we mention:
Go to Tools > Board and select ESP32 > ESP32 Dev Module

If you don’t have the ESP32 boards installed, you must follow this tutorial first: https://randomnerdtutorials.com/installing-esp32-arduino-ide-2-0/

Then, make sure you follow the section to install the required libraries.

Then, it should work.

I hope this helps.

Regards,
Sara

/Users/faddah/Documents/Arduino/cyd_sketch_1_display_test_test_touchscreen/cyd_sketch_1_display_test_test_touchscreen.ino:32:36: error: 'VSPI' was not declared in this scope
SPIClass touchscreenSPI = SPIClass(VSPI);
^~~~
/Users/faddah/Documents/Arduino/cyd_sketch_1_display_test_test_touchscreen/cyd_sketch_1_display_test_test_touchscreen.ino:32:36: note: suggested alternative: 'SPI'
SPIClass touchscreenSPI = SPIClass(VSPI);
^~~~
SPI
/Users/faddah/Documents/Arduino/cyd_sketch_1_display_test_test_touchscreen/cyd_sketch_1_display_test_test_touchscreen.ino: In function 'void setup()':
/Users/faddah/Documents/Arduino/cyd_sketch_1_display_test_test_touchscreen/cyd_sketch_1_display_test_test_touchscreen.ino:78:75: error: no matching function for call to 'SPIClass::begin(int, int, int, int)'
touchscreenSPI.begin(XPT2046_CLK, XPT2046_MISO, XPT2046_MOSI, XPT2046_CS);
^
In file included from /Users/faddah/Documents/Arduino/cyd_sketch_1_display_test_test_touchscreen/cyd_sketch_1_display_test_test_touchscreen.ino:11:0:
/Users/faddah/Library/Arduino15/packages/arduino/hardware/avr/1.8.7/libraries/SPI/src/SPI.h:159:15: note: candidate: static void SPIClass::begin()
static void begin();
^~~~~
/Users/faddah/Library/Arduino15/packages/arduino/hardware/avr/1.8.7/libraries/SPI/src/SPI.h:159:15: note: candidate expects 0 arguments, 4 provided
exit status 1

Compilation error: 'VSPI' was not declared in this scope


Good morning. I resolved my issue. I learned two things.

The physical size of the display doesn’t imply the resolution changes.

The truncation issue I had was because the physical screen is different than the lvgl screen. Since the screen was rotated in the code the x and y dimensions are swapped in lvgl. I was creating a 240 pixel wide screen along the 320 pixel physical screen dimension.