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Altera_Forum's avatar
Altera_Forum
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11 years ago

Open source OS

Hi, I am a beginner to embedded OS. can you introduce open source RTOS OS to work on Nios II ? I search for a free RTOS OS that its performance is similar to commercial OS such as ecos. Best R...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
11 years ago

Given that you are a beginner, it would be useful to read about an RTOS and be able to use the code. I would recommend downloading the Micrium books about uCOS-III.

http://micrium.com/

You may need to register to download the PDFs, but its definitely worth it.

The NIOS II examples already have uCOS-II examples.

If you want to understand how to port the OS, then read through this document (its for an ARM microcontroller);

https://www.ovro.caltech.edu/~dwh/ucos/project_ar1803.pdf

https://www.ovro.caltech.edu/~dwh/ucos/gcc_and_ucosii.zip

uCOS-II and uCOS-III are not open-source, but their source code is available to read. You can use the OS for university and non-commercial purposes.

Once you understand uCOS-II/III you can take a look at other OSes, eg., FreeRTOS.

http://www.freertos.org/

Cheers,

Dave