# Graphics / `lvgl` LVGL

## Usage

Import with `#include <lvgl/lvgl.h>` or `#include <lvgl.h>`.

Upstream example ported to NuttX is present at `examples/lvgldemo`.

LVGL can be used with framebuffer device. To find example boards with this
preconfigured, search for `CONFIG_GRAPHICS_LVGL=y` in `defconfig` files. All of
them have also `CONFIG_VIDEO_FB=y` present.

As a second option, LVGL can talk to a display driver and explicitly draw line
by line. For this case, there is no preconfigured board present. Go to _Porting_
section of upstream documentation for more hints.

## Resources

- [API documentation with examples](https://docs.lvgl.io/latest/en/html/index.html)
- [GitHub / LVGL / LVGL library](https://github.com/lvgl/lvgl)
- [GitHub / LVGL / Examples, tutorials, applications](https://github.com/lvgl/lv_examples)
- [GitHub / LVGL / Desktop simulator](https://github.com/lvgl/lv_sim_eclipse_sdl)
- [GitHub / LVGL / Web simulator](https://github.com/lvgl/lv_sim_emscripten)