Lightweight button manager

LwBTN is a lightweight, platform independent library for button and input-pin management in embedded systems. It debounces raw pin state changes and turns them into click, multi-click and keep-alive (long-press) events, delivered through a single application callback.

Open documentation

Features

• Written in C (C11), compatible with stdint.h data types
• Platform independent, requires user to provide millisecond timing source
• No dynamic memory allocation
• Callback-driven event management
• Support for click, multi-click and keep-alive (long press) events
• Support for software debounce for press and release events
• Runtime configurable debounce, click and keep-alive timing, per button
• Selectable button state acquisition: callback, manual or hybrid mode
• Support for multiple independent button-group instances
• Easy to use and maintain
• User friendly MIT license

Contribute

Fresh contributions are always welcome. Simple instructions to proceed:

1. Fork Github repository
2. Follow C style & coding rules and use clang-format to format the code
3. Create a pull request to develop branch with new features or bug fixes

Alternatively you may:

1. Report a bug
2. Ask for a feature request