# lv_arduino

**Repository Path**: liuzhijie029_liuzhijie/lv_arduino

## Basic Information

- **Project Name**: lv_arduino
- **Description**: No description available
- **Primary Language**: Unknown
- **License**: MIT
- **Default Branch**: master
- **Homepage**: None
- **GVP Project**: No

## Statistics

- **Stars**: 0
- **Forks**: 0
- **Created**: 2022-02-07
- **Last Updated**: 2022-02-07

## Categories & Tags

**Categories**: Uncategorized

**Tags**: None

## README

:warning: This library is now obsolete. Please use https://github.com/arduino/Arduino/issues/10592 instead. :warning:

Learn how to use LVGL with Ardunio: https://docs.lvgl.io/latest/en/html/get-started/arduino.html

# LVGL Arduino library

This library allows to use LVGL (v7.0.x) as an Arduino library. Library can be installed via Arduino IDE Library Manager or as an .ZIP library.

## Example

There is simple example which uses https://github.com/Bodmer/TFT_eSPI library as an TFT driver to simplify testing. To get all this to work you have to setup TFT_eSPI to work with your TFT display type via editing the `User_Setup.h` file in TFT_eSPI library folder, or by selecting your own configurtion in the `User_Setup_Select.h` file in TFT_eSPI library folder.

LittlevGL library has its own configuration file in `lv_conf.h` file, which is locatd in LittlevGL library folder. Please get in mind to check that the corresponding resolutions in LVGL configuration match the ones in TFT_eSPI and with the physical resolution of your display.

Example result should look like this:

![LVGL Arduino example result](extras/img/lvglarduino.jpg)

Tested with:

  * My own ESP32 board, module ESP32 Wroom
  * PC OS: Linux, Ubuntu 20.04 LTS
  * IDE: Arduino IDE 1.8.12
  * ESP32 Core: 1.0.4

## Debugging

In case of trouble there are debug informations inside LVGL. In the `ESP32_TFT_eSPI` example there is `my_print` method, which allow to send this debug informations to the serial interface. To enable this feature you have to edit `lv_conf.h` file and enable logging in section `log settings`:

```c
/*Log settings*/
#define LV_USE_LOG      1   /*Enable/disable the log module*/
#if LV_USE_LOG
/* How important log should be added:
 * LV_LOG_LEVEL_TRACE       A lot of logs to give detailed information
 * LV_LOG_LEVEL_INFO        Log important events
 * LV_LOG_LEVEL_WARN        Log if something unwanted happened but didn't cause a problem
 * LV_LOG_LEVEL_ERROR       Only critical issue, when the system may fail
 * LV_LOG_LEVEL_NONE        Do not log anything
 */
#  define LV_LOG_LEVEL    LV_LOG_LEVEL_WARN
```

After enabling log module and setting LV_LOG_LEVEL accordingly the output log is sent to the `Serial` port @ 115200 Bd.