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Altera_Forum
Honored Contributor I
886 Views

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 Regards.
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3 Replies
Altera_Forum
Honored Contributor I
30 Views

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
Altera_Forum
Honored Contributor I
30 Views

Dear Dave, 

many thanks. I read some documents about RTOS previously. what is your opinion about read ecos documents to start RTOS learning? 

I am an student and i am working on my final university project. How can i get license of uC/OS-III or uC/OS-II ? 

Best Regards.
Altera_Forum
Honored Contributor I
30 Views

 

--- Quote Start ---  

 

I read some documents about RTOS previously. what is your opinion about read ecos documents to start RTOS learning? 

 

--- Quote End ---  

 

I never found eCOS documentation particularly good. I have this book 

 

http://www.amazon.com/embedded-software-development-anthony-massa/dp/0130354732 

 

which you can download in PDF from 

 

http://ecos.sourceware.org/docs.html 

 

I read it, but was never inspired to use eCOS ... whereas I have had uCOS-II running in one system continuously since 2000. 

 

 

--- Quote Start ---  

 

I am an student and i am working on my final university project. How can i get license of uC/OS-III or uC/OS-II ? 

 

--- Quote End ---  

 

You don't need it. You already have the source to uCOS-II in your Quartus/NIOS installation. You can download the source to uCOS-III from the Micrium site, along with PDF copies of all the books they sell. 

 

Cheers, 

Dave