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• RP2040
• 3.5" TFT screen with ILI9488 Screen more details
• Resistance touch with XPT2046

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• VS Code
• PlatformIO
• eSPI
• LVGL 8.3
• XPT2046 Driver

; Platformio.ini

 -DILI9488_DRIVER=1
 -DTFT_WIDTH=480
 -DTFT_HEIGHT=320
 -DTFT_MOSI=11
 -DTFT_SCLK=10
 -DTFT_CS=9
 -DTFT_DC=8
 -DTFT_RST=12

As a PlatformIO project, most eSPI settings are defined on platformio.ini. Please check if you want to modify them.

NOTE: I use SPI channel 1 instead of channel 0, so I must write below in platformio.ini.

; Platformio.ini

-DTFT_SPI_PORT=1

Acorrding to the author's description, we just need define CS PIN for XPT2046 driver, and others PINS are automatically defined.

// main.cpp

#define CS_PIN 17

Then, we need connect the wires:

• TOUCH_RX GP16
• TOUCH_CS GP17(connect not in this photo)
• TOUCH_SCK GP18
• TOUCH_TX GP19

We need set back lighting as a NONE-ZERO constant, or set int between 0 and 255. If you set nothing to it, you will see nothing display. As the demo, I set 150.

// main.cpp

#define TFT_BL 13
uint8_t TftBackground = 150;