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