MultiButton

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MultiButton is an open-source button driver library for embedded systems that provides a compact and flexible state machine for handling various button events. It features hardware debouncing and supports an unlimited number of button instances with configurable timing.

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At a glance

Pricing

Open Source

Free tier

Yes

API

Skill level

Technical

About

What is MultiButton?

MultiButton is a highly efficient and flexible button driver library specifically designed for embedded systems. It utilizes a state machine architecture to reliably detect and manage various button events, including press down, press up, single click, double click, long press start, long press hold, and repeat press. The library incorporates hardware debouncing to eliminate contact bounce, ensuring accurate event detection. Its linked-list architecture allows for an unlimited number of button instances, making it suitable for complex projects. Developers can choose between callback-based or polling-based event handling and configure timing thresholds and debounce depth to suit their specific application needs. MultiButton also offers a thread-safe option for RTOS environments with zero overhead on bare-metal systems.

Best used for

Ideal for embedded system developers who need to implement reliable and flexible button input handling, manage various button events like single/double clicks and long presses, and ensure hardware debouncing. Especially valuable for resource-constrained systems requiring efficient and configurable button drivers.

Common actions

handle button input

manage button events

implement hardware debouncing

develop embedded systems

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Capabilities

Key features

7 button event types
Hardware debounce built-in
State machine driven logic
Unlimited button instances
Callback and polling modes
Memory efficient design
Configurable timing thresholds

Target Audience

developer

Integrations

Not yet documented

Pricing & Plans

Open Source

Free

FAQs

What types of button events does MultiButton support?

MultiButton supports 7 distinct event types: press down, press up, single click, double click, long press start, long press hold, and repeat press. This comprehensive set allows for detailed interaction with physical buttons in embedded applications.

Can MultiButton be used in a multi-threaded RTOS environment?

Yes, MultiButton is designed to be thread-safe for RTOS environments. By defining specific lock macros (MULTIBUTTON_THREAD_SAFE, MULTIBUTTON_LOCK, MULTIBUTTON_UNLOCK), developers can integrate it with their RTOS mutexes, ensuring safe operation without overhead on bare-metal systems.

How can I detect a triple click or N-click using MultiButton?

While MultiButton natively supports single and double clicks, you can detect triple clicks or higher N-clicks by registering a BTN_PRESS_REPEAT callback and then checking the button_get_repeat_count() function. This allows for custom logic based on the number of rapid presses.

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