Event Manager library
Library overview
Event Manager is a lightweight embedded library that enables event-based communication between software modules without direct coupling.
It helps reduce inter-module dependencies and improves system modularity, scalability, and maintainability.
The library implements the Observer design pattern:
modules can subscribe to specific events, and when an event is triggered, all registered subscribers are notified automatically.
Each subscriber provides a callback function, which is executed sequentially in the context of the event publisher – making execution flow explicit and predictable, a key requirement in many embedded systems. Here is an example of event-based communication between software modules:
Key characteristics
- Loosely coupled architecture – publishers and subscribers are fully decoupled
- Deterministic behavior – callbacks are executed synchronously and in a defined order
- Static memory only – no dynamic allocation, suitable for safety-critical and resource-constrained systems
- Configurable at compile time – tailor memory usage to your project’s needs
Events
Event identifiers are fully user-defined and can be declared using either #define constants or an enum.
Each event ID must fall within the configured event range.
This approach allows the library to integrate cleanly into existing codebases without enforcing a specific naming or event definition scheme.
Configuration & resource usage
The library is designed with memory efficiency in mind:
- Maximum number of callbacks per event – configurable
- Total number of supported events – configurable
Default values are suitable for most small to medium embedded projects, while larger systems can increase the limits at the cost of proportional memory usage.
Intended use cases
- Embedded applications with multiple independent modules
- Systems where tight coupling must be avoided
- Projects requiring predictable execution and no dynamic memory
- Bare-metal or RTOS-based firmware
Documentation & examples
- Detailed API reference is available in Doxygen documentation
- A complete example application demonstrates typical usage patterns and integration
- The example  application is available also in GitHub: EventManager-Example
Are you interested?
All libraries are proprietary and provided strictly under commercial license agreements. Source code is shared only after signing a Software License Agreement.