Expert Professional Support for THREADX and middleware

Original authors of THREADX (and middleware) are here to help!

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Original THREADX Team: Unparalleled Support & Expertise

With decades of THREADX domain experience, our team delivers professional, fully ticketed and tracked support for individual projects through entire enterprises. Being the original authors, nobody knows the THREADX technology more than us. We are committed to taking care of you!

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You Benefit

By leveraging our professional THREADX support, your team will benefit in many ways, including the following:

  • Faster Problem Resolution
  • Reduced Project Stalls
  • Improve Product Quality
  • Reduce Project Risk
  • Improve Product Safety
  • Reduce Developer Fatigue
  • Improve Time-To-Market
THREADX Benefits

Over 10 Billion deployments of THREADX

 Making THREADX one of the most deployed RTOS in the world!

 By VDC Research

  • Consumer
  • Medical
  • Industrial
  • SoC
  • Wireless
  • Automotive
  • Home Automation

Industrial Grade

RTOSX Kernel is an advanced, 5th generation RTOS, designed for the most demanding THREADX-based embedded applications.


Ultrahigh Performance

Its ultrahigh-performance (sub-microsecond context switching and API calls on most microprocessors) and rich determinism make it ideal for the most demanding real-time needs.

Ultrasmall Size

It’s ultrasmall size (< 1KB for minimal use) allows RTOSX Kernel to fit into some of the most memory constrained devices.

Safe and Secure

The RTOSX Kernel is designed explicitly for safety and security, including its unique Pointer/Data Verification (PDV) technology (Patent pending) and extensive testing (100% statement and branch decision coverage).

Simple To Use

You can install and use the RTOSX Kernel in minutes. With a native implementation of the THREADX API using PX5 RTOS core technology, your team is free to focus on your application right away - no learning of a propriety RTOS required!

Built for developers

Built for simplicity, the RTOSX Kernel is composed of just two source files, namely rx.c and rx_binding.s. Installing and using the RTOSX Kernel is conceptually a 3 step process that can be done in minutes!


Place the RTOSX Kernel distribution (rx.c, rx_binding.s and header files) into your C main project source directory.


Add rx.c and rx_binding.s to your project (IDE or makefile). No complicated project and/or linker control file changes necessary.


Modify your C main program to including “tx_api.h” and call “tx_kernel_enter.” Also add “tx_application_define” which is where you will create your initial objects.


Fast & Efficient

The RTOSX Kernel is extremely fast and efficient. On typical 32-bit microcontrollers running at 80MHz, most API calls and context switches complete in less than one microsecond. The RTOSX Kernel is also deterministic. The processing for each API and context switch is completely predictable and not a function of how many threads are active at any particular point in time.



The RTOSX Kernel enables you to deliver better quality IoT devices in record time – even for the most demanding applications.

  • System-on-Chip (SoC)
  • Industrial
  • Medical Devices
  • Consumer Electronics
  • Automotive
  • Office Automation
  • Networking
  • Military/Aerospace

Ready to Migrate to the Latest RTOS?

Introducing the advanced 5th generation PX5 RTOS with native POSIX pthreads+ support.

If your project demands the very latest in RTOS technology and/or you need to share code between an embedded Linux project and a deeply embedded project, the industrial grade PX5 RTOS is the solution.

Explore PX5 RTOS

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