Display Drivers Example

This example is designed to show how the display_drivers component can be used to drive various different displays with LVGL and a simple GUI (that is contained within the example: main/gui.hpp).

Demo

Below can be seen what the demo looks like on the T-Encoder-Pro devkit:

https://github.com/user-attachments/assets/fef57074-bab7-4fdf-a25e-f4590773c926

Here it is running on the ALXV Labs Byte90:

How to use example

Hardware Required

This example can be configured to run on the following dev boards:

• ESP32-WROVER-Kit
• TTGO T-Display
• ESP32-S3-BOX
• Smartknob-HA
• T-Encoder Pro
• ALXV Labs Byte90

Configure the project

idf.py menuconfig

When configuring the project, select the Display Drivers Example Configuration value that matches the board you've selected (must be one of the 4 boards mentioned above.)

Build and Flash

Build the project and flash it to the board, then run monitor tool to view serial output:

idf.py -p PORT flash monitor

(Replace PORT with the name of the serial port to use.)

(To exit the serial monitor, type Ctrl-].)

See the Getting Started Guide for full steps to configure and use ESP-IDF to build projects.

Example Breakdown

The example has the following functionality:

• SPI pre and post transfer callbacks for handling the data/command (DC_LEVEL) GPIO for the screens and the lvgl flush flag management
• lcd_write for polling (blocking) transmit example
• lcd_send_lines and lcd_wait_lines for queued (non-blocking) transmit example
• Gui class (contained in main/gui.hpp) which encapsulates some very basic LVGL components into an object that manages gui update task and synchronization.