MQX

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MQX (Message Queue eXecutive) is a real-time operating system (RTOS) developed by Precise Software Technologies, Inc., and currently sold by Synopsys, Embedded Access, Inc., and NXP Semiconductors.

Like most RTOSs, MQX includes a multitasking kernel with pre-emptive scheduling and fast interrupt response, extensive inter-process communication and synchronization facilities, and a file system.

Its configurable size conserves computer memory space using a minimum of 6 KB of read-only memory (ROM), including its kernel, interrupts, semaphores, queues, and a memory manager.

MQX includes an Internet protocol suite TCP/IP stack (RTCS), embedded File Allocation Table based DOS file system (MFS), Universal Serial Bus (USB) host/device stack, and design, debugging (task-aware (TAD), and remote), and performance analysis tools.^[1] It is supported by popular libraries for Secure Sockets Layer (SSL) and Transport Layer Security (TLS) such as wolfSSL for increased security measures.

MQX is generally used in embedded systems. MQX development occurs on a host machine running Unix or Windows, and cross-compiles target software to run on various target central processing unit (CPU) architectures.

MQX has been ported to many platforms and now runs on most modern CPUs used in the embedded market, including Kinetis, ColdFire, PowerPC, ARC, ARM, StrongARM, xScale.

All new Kinetis (ARM Cortex-M4), i.MX RT (ARM Cortex-M7), and ColdFire devices will be enabled with complementary Freescale MQX RTOS. Freescale plans to expand the availability of this complementary integrated enablement software to include many embedded processors in its broad portfolio.