Can anyone give me the source of ucos-ii for XC167?

Not legally - you have to buy it:

Actually, looking at the source code is free. You have to pay if you want to use it in a commercial product, however.

Not legally - you have to buy it:

Actually, looking at the source code is free. You have to pay if you want to use it in a commercial product, however.

So it is:

www.micrium.com/.../licensing.html

So why does the OP need someone here to give it to him/her?
Why can't he/she just go and download it for him/her self?