Specifications

MicroC/OS-II Real-Time Operating System
10
2015.05.14
NII5V2
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Overview of the MicroC/OS-II RTOS
MicroC/OS-II is a popular real-time kernel produced by Micrium
®
Inc. MicroC/OS-II is a portable,
ROMable, scalable, pre-emptive, real-time, multitasking kernel. First released in 1992, MicroC/OS-II is
used in hundreds of commercial applications. It is implemented on more than 40 different processor
architectures in addition to the Nios II processor.
MicroC/OS-II provides the following services:
• Tasks (threads)
• Event flags
• Message passing
• Memory management
• Semaphores
• Time management
The MicroC/OS-II kernel operates on top of the hardware abstraction layer (HAL) board support package
(BSP) for the Nios II processor. Because of this architecture, MicroC/OS-II development for the Nios II
processor has the following advantages:
• Programs are portable to other Nios II hardware systems.
• Programs are resistant to changes in the underlying hardware.
• Programs can access all HAL services, calling the UNIX-like HAL application program interface (API).
• ISRs are easy to implement.
Further Information
This chapter discusses the details of how to use MicroC/OS-II for the Nios II processor only.
MicroC/OS-II is not compatible with external interrupt controllers on the External Interrupt Controller
(EIC) interface. MicroC/OS-II can only run on systems using the internal interrupt controller.
For more information about MicroC/OS-II features and usage, refer to MicroC/OS-II - The Real-Time
Kernel by Jean J. Labrosse (CMP Books).
Related Information
Micrium website
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