Quantum Leaps - QP-nano™ state machine framework/kernel

Quantum Leaps

QP-nano™ state machine framework/kernel

OS/RTOS

Product Description

QP-nano is the industry’s smallest state machine framework that enables building well-structured deeply embedded applications as a set of concurrently executing hierarchical state machines (UML statecharts) directly in C without big tools. QP-nano is described in the book “Practical UML Statecharts in C/C++, Second Edition” (Newnes, 2008).

The ultra-lightweight QP-nano is designed specifically for low-end memory-constrained MCUs. QP-nano consists of a universal UML-compliant hierarchical event processor (QEP-nano), a minimal real-time framework (QF-nano), and a choice between a preemptive kernel (QK-nano) and a cooperative kernel. The key QP-nano features are:

* Full support for hierarchical state nesting, including guaranteed entry/exit action execution on arbitrary state transition topology with up to 4 levels of state nesting
* Support for up to 8 concurrently executing active objects with deterministic, thread-safe event queues
* Support for events with one scalar parameter, configurable to 0 (no parameter), 1, 2, or 4 bytes
* Direct event delivery mechanism with first-in-first-out (FIFO) queuing policy
* One single-shot time event (timer) per active object with configurable dynamic range of 0 (no time events), 1, 2, or 4 bytes
* Built-in cooperative "vanilla" kernel
* Built-in preemptive run-to-completion kernel called QK-nano
* Low-power architecture with idle callback function for easy implementation of power-saving modes
* Assertion-based error handling policy

QP-nano runs beautifully on ARM7 and Cortex-M3 MCUs and is available for immediate download under the GPL version 2 open source license. Alternatively, QP-nano can be also licensed under the terms of traditional closed-source licenses, which expressly supersede the GPL and are specifically designed for licensees interested in retaining the proprietary status of their code.

http://www.state-machine.com/arm

Market Segment(s)

• Embedded
• Enterprise
• Home
• Mobile
• Emerging Applications

ARM Processor(s)

• ARM7EJ-S
• ARM7TDMI
• ARM7TDMI-S
• ARM720T
• Cortex-M3

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