NuttX 7.9

This project provides a real-time embedded operating system with a small footprint

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What's new in NuttX 7.5:

  • Features: Additional new features and extended functionality:
  • Core OS:
  • Watchdog Timer Allocation: (1) If we run out of pre-allocated watchdog times, the logic will now allocate additional timers from the heap. A reserve of pre-allocated watchdog timers is maintained so that there will always be timers available for interrupt handlers. (2) Added support for statically allocated watchdog timer
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BSD License 
Gregory Nutt
3.3/5 33
ROOT \ System \ Operating Systems \ Other
1 NuttX Screenshot:
NuttX is an open source, deterministic and free real-time embedded operating system (RTOS), designed from the offset to be usable in deeply embedded, resource constrained environments. It has a small footprint that is usable in micro-controller environments, and it’s fully scalable from tiny (8-bit) to moderate embedded (32-bit) systems.

It also aims to be fully compliant to standards, to be fully real time, and to be totally open. NuttX has a rich feature OS set, a modular design, it is highly scalable and configurable, as well as standards compliant. It is distributed with a non-restrictive BSD license. It is often dubbed by its developers as "Tiny Linux."

Features at a glance

Key features include core task management, BSD socket interface, memory allocators (shared memory, standard heap memory allocation, protected build with MPU, flat embedded build, per-process heaps, granule allocator and dynamically sized), memory configurations, porting guide, fully preemptible, tickless operation, on-demand paging and system logging.

In addition, the project comes with extensions to manage pre-emption, per-thread, built-in CPU load measurements, comprehensive documentation, optional tasks that contain address environments, ANSI-like and POSIX-like task controls, clocks, pthreads, environment variables, signals, named message queues, timers, filesystem and counting semaphores.

Among other features, we can mention round-robin scheduling, FIFO, support for priority inheritance, support for the SoC architecture, support for board architectures, support for new processor architectures, watchdog timers, VxWorks-like task management, I/O redirection and transmitted “controlling terminals.”

Supported platforms

NuttX supports a wide variety of hardware platforms, among which we can mention numerous ARM processors, including ARM Cortex-M3, ARM926EJS, ARM7TDMI, ARM Cortex-M4, ARM Cortex-M0, ARM920T and ARM Cortex-A5, as well as the Atmel 8-bit AVR, Freescale M68HCS12, AVR32 Atmel AVR platforms.

Additionally, it also supports various Intel platforms, such as MicroChip PIC32MX (MIPS), 80c52 and 80×86, Zilog platforms, including Zilog Z80, Zilog Z16F, Zilog Z8Encore! and Zilog eZ80 Acclaim!, and the Renesas/Hitachi SuperH and Renesas M16C/26 platforms.

NuttX was reviewed by , last updated on April 15th, 2015

#embedded OS #operating system #RTOS system #RTOS #embedded #OS #micro-controller

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