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Examples, tutorials and applications for the LVGL embedded GUI library
| Date | Stars |
|---|---|
| 2026-07-24 | 563 |
| 2026-07-25 | 563 |
| 2026-07-28 | 563 |
| 2026-07-30 | 563 |
| 2026-08-06 | 563 |
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# lv_demos
Extended demo applications for LVGL (Light and Versatile Graphics Library). This repository contains niche and specialized demo applications that showcase advanced LVGL features and use cases.
## Overview
This repository contains additional standalone demo applications beyond the core LVGL demos. Each demo is self-contained and demonstrates specific features or real-world applications. Demos can be easily integrated into LVGL-based projects through CMake and FetchContent.
## Repository Structure
```
lv_demos/
├── src/
│ ├── ebike/ # eBike demo
│ │ ├── *.c # Demo source files
│ │ └── *.h # Demo header files
│ ├── smartwatch/ # Stress test demo
│ │ ├── *.c
│ │ └── *.h
│ └── lv_demos.h # Main header with feature guards
├── CMakeLists.txt # Build configuration
├── lv_demos_ext.h # Public API header
└── README.md # This file
```
## Demo Features
Each demo is conditionally compiled based on `LV_USE_DEMO_*` defines set in `lv_conf.h`. This allows you to include only the demos you need in your project, keeping the binary size minimal.
### Available Demos
Refer to `src/lv_demos.h` for the complete list of available demos and their corresponding `LV_USE_DEMO_*` flags.
## Building
The easiest way to try one of the demos is to add this repository to your application and build the source files by globbing them.
TODO: Document this approach
## CMake
You can also use CMake to integrate these demos into your application
### Prerequisites
- CMake 3.11 or higher
- C compiler (GCC, Clang, MSVC, etc.)
- LVGL library (as a dependency)
### Integration with FetchContent
The recommended way to use lv_demos_ext is to add it to your project's main CMakeLists.txt **after** LVGL:
```cmake
cmake_minimum_required(VERSION 3.16)
project(my_app)
# 1. Add LVGL first via subdirectory or fetchcontent
add_subdirectory(lvgl)
# 2. Fetch and add lv_demos_ext
include(FetchContent)
FetchContent_Declare(
lv_demos_ext
GIT_REPOSITORY https://github.com/lvgl/lv_demos
GIT_TAG master
)
FetchContent_MakeAvailable(lv_demos_ext)
# 3. Link lv_demos_ext with LVGL
target_link_libraries(lvgl PUBLIC lv_demos_ext)
# 4. Link LVGL to your application
add_executable(my_app src/main.c)
target_link_libraries(my_app PRIVATE lvgl)
```
**Important:** LVGL must be added before lv_demos_ext, as lv_demos_ext depends on LVGL being available.
### CMake Integration
For comprehensive CMake integration guidance, refer to the [LVGL CMake documentation](https://docs.lvgl.io/master/details/integration/building/cmake.html).
### Using with lv_port_linux
The [lv_port_linux](https://github.com/lvgl/lv_port_linux) repository can automatically fetch and integrate lv_demos_ext.
Simply enable one of the demos in your lv_port_linux configuration, and the build system will automatically include lv_demos_ext.
## Usage
Once integrated, enable the desired demos by defining their corresponding `LV_USE_DEMO_*` flags in your `lv_conf.h`:
```c
#define LV_USE_DEMO_EBIKE 1
#define LV_USE_DEMO_STRESS 1
// Add other demo defines as needed
```
Then include and call the demo in your application:
```c
#include "lv_demos_ext.h"
int main(void) {
lv_init();
/* Display a demo */
lv_demo_ebike();
/* Your event loop */
while(1) {
uint32_t sleep_ms = lv_timer_handler();
lv_sleep_ms(sleep_ms);
}
return 0;
}
```
## Dependencies
- **LVGL**: Light and Versatile Graphics Library - required for all demos
## Contributing
Contributions are welcome! Please submit pull requests with:
- Clear descriptions of changes
- Any new demos should follow the existing code structure
- Proper documentation for new functionality
## Support
For questions regarding LVGL, visit: [LVGL Documentation](https://docs.lvgl.io/)
For issues specific to this repository, please open an issue on Github.
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