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Chapter 37. µITRON API

Table of Contents
Introduction to µITRON
µITRON and eCos
Task Management Functions
Task-Dependent Synchronization Functions
Synchronization and Communication Functions
Extended Synchronization and Communication Functions
Interrupt management functions
Memory pool Management Functions
Time Management Functions
System Management Functions
Network Support Functions
µITRON Configuration FAQ

Introduction to µITRON

The µITRON specification defines a highly flexible operating system architecture designed specifically for application in embedded systems. The specification addresses features which are common to the majority of processor architectures and deliberately avoids virtualization which would adversely impact real-time performance. The µITRON specification may be implemented on many hardware platforms and provides significant advantages by reducing the effort involved in understanding and porting application software to new processor architectures.

Several revisions of the µITRON specification exist. In this release, eCos supports the µITRON version 3.02 specification, with complete “Standard functionality” (level S), plus many “Extended” (level E) functions. The definitive reference on µITRON is Dr. Sakamura’s book: µITRON 3.0, An Open and Portable Real-Time Operating System for Embedded Systems. The book can be purchased from the IEEE Press, and an ASCII version of the standard can be found online at