Implementation of Cordic Algorithm for FPGA. Based Computers Using Verilog. pani1, ju, a3. The CORDIC rotator seeks to reduce the angle to zero by rotating the vector. To compute . See the description of the CORDIC algorithm for details. */ module. Tags: verilog code for cordic algorithm verilog code for vector verilog code for .. specific device designations, other words log Abstract.. code in the example.

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Here is my code to compute sine and cosine of the input angle using cordic algorithm:. Also, the arctangent values tan -i 2 -i can be precomputed and stored in a small look-up table. The Cordic algorithm is an iterative algorithm based on vector rotations over elementary angles. These rotation crodic can be strung together to accomplish many digital logic purposes.

Cordic-based Sine Computer

The algorithm normally operates in one of two modes. O ye simple, understand wisdom: PW – 3 ] Each rotation opportunity will set xv[0]yv[0]and ph[0]. Anyway, the cast is an additional safety net.

We will use this as the basis of our algorithm:. Ok will try and get back. This is just fine for the convertor. That is, it quantifies our amplitude distortion. Here is my code to compute sine and cosine of the input angle using cordic algorithm: It is therefore defined to simply be equal to the sign bit of angle:. A simple two-dimensional rotation matrix is im by: In addition veripog the Verilog code for the design itself, it also generates a Verilog test bench stub that defines an interface between the Verilog design and a Cosimulation object.


Cordic-based Sine Computer

We start by doing the Verilog conversion itself first. Post Your Answer Discard By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of serviceprivacy policy and cookie policyand that your continued use of the website is subject to these policies.

We need five registers: The Verilog output is as follows:. Therefore, the convertor works on the simulatable data structure, which is a hierarchical list of generators. What we now have is an algorithm that is veriilog to implement in hardware, but is still equivalent to the original algorithm.

I am getting this error from days now.

Otherwise, Verilog will interprete all operands in a mixed expression as unsigned. Therefore, this example has been the trigger to fix these bugs and develop MyHDL 0. Note how this single-line lookup is expanded into a case statement in the Verilog output. Oldfart 7, 2 8 Email Required, but never shown. In this way, the rotating vector can be directed to converge on a particular result vector.


The Verilog convertor makes this task easier.

Computing sin & cos in hardware with synthesisable Verilog

On the one hand, we can constrain the instances as integer subtypes by specifying verilig valid integer range at construction time. In contrast, a Verilog designer is forced to deal with low-level representational issues explicitly.

The fundamental veriolg is that Verilog uses an unsigned interpretation by default, which is the opposite from what you should do to get the naturally expected results. The two states that we will use are 0an idle state, and 1a state indicating computation is occurring. These applications would nominally send 1,0 into the algorithm as an input. Therefore, the comparisons between expected and actual results are performed using an error margin.

For these applications, the way to compensate for the gain is to send a different number as an input. If more iterations or higher precision calculations are desired then a new arctan table will need to be computed.