FreeRTOS/FreeRTOS-Kernel
FreeRTOS Kernel
FreeRTOS-Kernel is a real-time operating system kernel for microcontrollers. It provides a multitasking environment through a priority-based task scheduler, an embedded memory manager, and an inter-process communication framework to ensure time-critical tasks meet their deadlines.
The kernel includes a software timer engine for executing functions at predefined intervals or after set delays. It supports a minimal model of concurrent tasks and lightweight co-routine execution for systems with limited memory resources.
The project covers a broad surface of embedded resource management, including inter-task communication via queues and event groups, and deterministic system resource scheduling.
Project integration is managed through build system integration using fetch tools or version control submodules.
Features
- Microcontroller Kernels - Acts as a full core kernel implementation for managing hardware abstraction and process scheduling on microcontrollers.
- Preemptive Multitasking Kernels - Provides a preemptive multitasking kernel that ensures time-critical tasks meet deadlines on microcontrollers.
- Task Schedulers - Implements a priority-based scheduler to manage execution threads and resource allocation on embedded hardware.
- Inter-Process Communication Frameworks - Ships a framework of IPC primitives, including queues and event groups, for coordinating data exchange between tasks.
- Inter-Process Communication - Provides core inter-process communication primitives such as thread-safe message queues for data exchange between tasks.
- Kernel Context Switching - Saves processor registers to the task stack during context swaps to preserve execution state.
- Embedded Memory Management - Provides a dynamic memory allocation system tailored for the constraints of microcontrollers and real-time environments.
- Real-Time Operating Systems - Provides a multitasking real-time operating system kernel ensuring deterministic scheduling for microcontrollers.
- Real-Time Implementations - Implements practical real-time scheduling algorithms to ensure time-critical tasks meet their deadlines.
- Real-Time Task Scheduling - Implements a deterministic real-time scheduler for managing task execution and hardware resource allocation.
- Preemptive Scheduling - Implements a preemptive scheduler that ensures high-priority tasks can interrupt lower-priority ones for real-time response.
- Timed Event Scheduling - Provides software timers for executing specific functions at predefined intervals or after set delays.
- Resource-Constrained Concurrency - Supports a minimal model of concurrent tasks specifically designed for systems with very limited available memory.
- Co-routine Runtimes - Supports lightweight co-routine execution for systems with extremely limited memory resources.
- Fixed-Size Memory Pool Managers - Implements fixed-size memory pool managers to prevent heap fragmentation and ensure deterministic allocation times.
- Software Timer Engines - Provides a dedicated engine for executing specific functions at predefined intervals or after set delays.
- Task Blocking Mechanisms - Places tasks in a dormant state using wait-lists until a specific event or timeout occurs to save CPU cycles.
- Time Slicing - Uses periodic hardware timer interrupts to track system time and switch between equal-priority tasks.
- Embedded Systems - Lightweight real-time kernel.
Star history
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