/esp32_lvgl_experiments

Primary LanguageCMIT LicenseMIT

LittlevGL project for ESP32

Example GUI with LittlevGL on ESP32

Get started

Install the ESP32 SDK

  1. Install ESP-IDF: http://esp-idf.readthedocs.io/en/latest/
  2. Get this projects: git clone --recurse-submodules https://github.com/littlevgl/esp32_ili9431.git

Add LittlevGL to the build

To link LittlevGL (lvgl) and lv_examples with ESP-IDF you need to add a component.mk file to each directory.

Next to this REAMDE file you find two component.mk files:

  • lvgl_component.mk
  • lv_example_component.mk

Rename lvgl_component.mk to component.mk and move it to the lvgl directory, then rename lv_example_component.mk to component.mk and move it to the lv_examples directory.

Flash to ESP32

  1. If you are not in the project's diectory: cd esp32_ili9431
  2. Build the project: make
  3. Upload the application to your board: make flash

Drivers

This project comes with an ILI9341 display driver and an XPT2046 resistive touchpad driver. Both devices are communicating via SPI.

ILI9341

The default pinout is:

Name Pin
MOSI 13
SCLK 14
CS 5
DC 19
BCKL 23
RST 18

You can modify the pin configuration in drv/disp_spi.h and drv/ili9341.h

For ILI9341 HSPI is used.

XPT2046

The default pinout is

Name Pin
MOSI 32
MISO 35
SCLK 26
CS 33
IRQ 25

You can modify the pin configuration in drv/tp_spi.h and drv/spt2046.h

For XPT2046 VSPI is used

ESP32 DevKit v1 with 30 GPIOS

There is another development kit with only 30 GPIOs available:

LittlevGL on ESP32 Kit with 30 GPIO

ILI9341

For ILI9341 HSPI is used, modify the pin configuration in drv/disp_spi.h to:

#define DISP_SPI_MOSI 13
#define DISP_SPI_CLK  14
#define DISP_SPI_CS   15

and drv/ili9341.h to:

#define ILI9341_DC   2
#define ILI9341_RST  4
#define ILI9341_BCKL 21

XPT2046

For XPT2046 VSPI is used, modify the pin configuration in drv/tp_spi.h to:

#define TP_SPI_MOSI 23
#define TP_SPI_MISO 19
#define TP_SPI_CLK  18
#define TP_SPI_CS   5

and drv/spt2046.h to:

#define XPT2046_IRQ 25