Display and touchpad drivers for ESP32 using LVGL

For a ready to use ESP32 project take look at the lv_port_esp32 repository.

Table of content

• Supported display controllers
• Supported indev controllers
• Support for predefined development kits
• Thread-safe I2C with I2C Manager
• Backlight control

NOTE: You need to set the display horizontal and vertical size, color depth and swap of RGB565 color on the LVGL configuration menuconfig (it's not handled automatically).

Supported display controllers

Supported indev controllers

• XPT2046
• FT3236, FT6X36
• FT6206 controllers should work as well (not tested)
• STMPE610
• FT81x (Single, Dual, and Quad SPI)

If your display or input device (touch) controller is not supported consider contributing to this repo by adding support to it! Contribute controller support

Support for predefined development kits

You can also use the predefined kits, which selects the correct display controllers on the kit, and sets the gpio numbers for the interface.

NOTE: See Supported display controllers for more information on display configuration. NOTE: See Supported indev controllers for more information about indev configuration.

Thread-safe I2C with I2C Manager

LVGL can use I2C to read from a touch sensor or write to a display, possibly many times a second. Meanwhile, other tasks may also want to read from i2c devices on the same bus. I2C using the ESP-IDF is not thread-safe.

I2C Manager (i2c_manager) is a component that will let code in multiple threads talk to devices on the I2C ports without getting in each other's way. These drivers use a built-in copy of I2C Manager to talk to the I2C port, but you can also use the I2C Manager component itself and have others play nice with LVGL and vice-versa. Click here for details.

Backlight control

Control of LCD's backlight is provided by separate module that is independent from the display driver. Configuration of the backlight controller can be found in menuconfig LVGL ESP Drivers -> LVGL TFT Display controller.

There are three modes of operation:

1. Off - No backlight control
2. Switch - Allows ON/OFF control
3. PWM - Allows brightness control (by Pulse-Width-Modulated signal)