Hi Anjeet,

You can implement arctan function by a CORDIC block operating in Vectoring mode. It's a pretty interesting segment of CORDIC.  You just check this document, http://www.andraka.com/files/crdcsrvy.pdf. Once you are done with basics, go for efficient architecture design for the same, and finally write the Verilog/VHDL code for the same.

I hope this helps you.

Good Luck.

Satyabrata

Hi Anjeet,

Check this youtube video.

https://www.youtube.com/watch?v=TJe4RUYiOIg

You will find a very good explanation of how CORDIC works and how to write the verilog code. Hope that helps.

- Shahriar.

You can look at this:

http://www.codeforge.com/article/88383.

You might want to checkout kvcordic, my implementation of a multi-mode, universal, CORDIC. There is documentation, software implementation of the algorithm plus VHDL hardware description. You can download it from either: http://github.com/nkkav/kvcordic or http://opencores.org/project,kvcordic . The Github repository is always up-to-date. I use fixed-point arithmetic with a Q2.14 representation. Both the C and VHDL testbenches showcase function approximation as for sine, cosine, atan, sqrt, etc.