The FreeRTOS kernel is now an MIT licensed AWS open source project, and these pages are being updated accordingly.

Quality RTOS & Embedded Software About   Contact   Support   FAQ   Download Menu      Quick Start Supported MCUs PDF Books Trace Tools Ecosystem Quick Start Guide Support Forum ⇓ Download Source ⇓ FreeRTOS+ Ecosystem  FreeRTOS+TCP:  Thread safe TCP/IP stack  SafeRTOS:  TUV certified RTOS  OpenRTOS:  Commercial Licensed RTOS  Fail Safe File System:  Ensures data integrity  FreeRTOS BSPs:  3rd party driver packages  Trace & Visualisation:  Tracealyzer for FreeRTOS  CLI:  Command line interface  WolfSSL SSL / TLS:  Networking security protocols  RTOS Training:  Delivered online or on-site  IO:  read(), write(), ioctl() interface FreeRTOS+ Lab Projects  FreeRTOS+POSIX:  POSIX threading API  FreeRTOS+FAT:  Thread aware file system Hint: Use the tree menu to navigate groups of related pages   Features Overview [About FreeRTOS] FreeRTOS Features: See also About FreeRTOS The Memory Usage, Boot Times and Context Switch Times FAQ FreeRTOS is a scale-able real time kernel designed specifically for small embedded systems. Highlights include: Free RTOS scheduler - preemptive, cooperative and hybrid configuration options, with optional time slicing. The SafeRTOS derivative product provides a high level of confidence in the code integrity. Includes a tickless mode for low power applications. RTOS objects (tasks, queues, semaphores, software timers, mutexes and event groups) can be created using either dynamically or statically allocated RAM. Tiny footprint. Official support for >30 embedded system architectures (counting ARM7 and ARM Cortex-M3 as one architecture each). FreeRTOS-MPU supports the ARM Cortex-M3 Memory Protection Unit (MPU). Designed to be small, simple and easy to use. Typically a RTOS kernel binary image will be in the region of 4K to 9K bytes. Very portable source code structure, predominantly written in C. Supports both real time tasks and co-routines. Direct to task notifications, queues, binary semaphores, counting semaphores, recursive semaphores and mutexes for communication and synchronisation between tasks, or between real time tasks and interrupts. Innovative event group (or event flag) implementation. Mutexes with priority inheritance. Efficient software timers. Powerful execution trace functionality. Stack overflow detection options. Pre-configured RTOS demo applications for selected single board computers allowing 'out of the box' operation and fast learning curve. Free monitored forum support, or optional commercial support and licensing. No software restriction on the number of real time tasks that can be created. No software restriction on the number of task priorities that can be used. No restrictions imposed on task priority assignment - more than one real time task can be assigned the same priority. Free development tools for many supported architectures. Free embedded software source code. Royalty free. Cross development from a standard Windows host. plus ... some older links Embedded Ethernet example applications. 'How FreeRTOS.orgTM works': Source code explained. Embedded software application design: Tips for using FreeRTOS on small embedded systems.