Cobham Gaisler AB provides IP cores and supporting development tools for embedded processors based on the SPARC architecture. We specialize in digital hardware design for both commercial and aerospace applications

Gaisler Research Announces ThreadX® RTOS Support for the LEON processor
ThreadX Port and Board Support Package is now available for the GNU based SW development environment

Gaisler Research AB, the leader in System on Chip (SoC) design, today announced that Express Logic’s ThreadX® RTOS now is supported by the LEON3 processor. A port, a board support package and a demonstration application are now available for the GNU based SW development environment.

- "Express Logic’s leadership in royalty-free real-time operating systems makes them an ideal partner for us,” said Jiri Gaisler, Founder & CTO of Gaisler Research. “ThreadX presents a small memory footprint with an easy to use, rich set of system services such as threads, message queues, counting semaphores, and mutexes. We are pleased to include ThreadX in our development environment, providing developers with a convenient introduction to the capabilities of ThreadX in their applications." 

ThreadX is Express Logic’s small, fast, royalty-free RTOS for demanding real-time applications. Its royalty-free business model makes ThreadX extremely attractive for high-volume devices. ThreadX’s ease-of-use enables ThreadX-powered devices to get to market on time and within budget, which accounts for ThreadX’s success in the marketplace and its high-volume implementations. ThreadX has been widely embraced and is currently deployed in excess of 450 million electronic products.  The LEON3 is a high-performance 32-bit SPARC V8 processor that provides computing capabilities to cost-sensitive embedded microcontroller applications at a cost equivalent to legacy 8- and 16-bit processors. The processor is available as a soft core for instantiations into both FPGAs and ASICs. The LEON3 processor is targeted at space, military, industrial and consumer electronics applications, such as satellites, digital set top boxes, and industrial power control devices. 

- "We are pleased to support Gaisler Research and the LEON3 processor,” commented John Carbone, Vice President of Marketing at Express Logic. “The LEON3 processor, which is available in source code, provides high performance and flexibility that meets the demands of any System on Chip design. The fault tolerant version delivers capabilities to protect against soft errors which are required for military and aerospace applications." 


Shipping and Availability

ThreadX is available from Express Logic in full source code form, royalty free, at license prices starting at $12,500. The LEON3 port and the BSP are available from Gaisler Research when licensing the LEON3 processor.


About Express Logic and ThreadX

Headquartered in San Diego, CA, Express Logic offers the most advanced run-time solution for deeply embedded applications, including the popular ThreadX® RTOS, the high-performance NetX™ TCP/IP stack, the FileX® embedded MS-DOS compatible file system, and the USBX™ Host/Device USB protocol stack. All products from Express Logic include full source-code and have no run-time royalties. For more information about Express Logic solutions, please visit the Web site at, call 1-888-THREADX, or email inquires to This email address is being protected from spambots. You need JavaScript enabled to view it..


About Gaisler Research

Gaisler Research AB is a provider of SoC solutions for exceptionally competitive markets such as Aerospace, Military and demanding Commercial applications. Gaisler Research's products consist of user-customizable 32-bit SPARC V8 processor cores, peripheral IP-cores and associated software and development tools. Gaisler Research solutions help companies develop highly competitive customer and application-specific SoC designs. Please visit for more information  ThreadX and FileX are registered trademarks, and NetX, CANX, USBX, preemption-threshold, picokernel, UDP fast path technology, are trademarks of Express Logic, Inc. All other brands or product names are the property of their respective holders.