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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Cordic Algorithm using Verilog – Electrical Engineering Stack Exchange

This piece of software needs to calculate the phase rotation angles. The verikog is that the convertible subset is much less restrictive. This is what we are going to try to do: One important feature of the convertor is that it handles the details of signed and unsigned representations automatically.

This is the easy part. We could apply this rotation using angles more suited for an FPGA. How shall I assign port direction to angle? Therefore, this example has been the trigger to fix these bugs and develop MyHDL 0.

Cordic-based Sine Computer

For pipelined options, this is the number of stages. These are the initial values of x, y, and the remaining phase to rotate through. Home Questions Tags Users Unanswered. It may be redundant in this case. The number of stages and the number of bits in each stage can both be defined based upon arguments to the core generator program.


The only way to prevent this bit-width problem associated with a one-size fits all solution is xlgorithm use a software program, sometimes called a core generator or coregento tailor the CORDIC to a specifically requested precision. In contrast, a Verilog designer is forced to deal with low-level representational issues explicitly.

That suggest to me it is an output. Further, the more of these rotation matrices you string together, the smaller the remaining rotation becomes, and hence the closer the result will come in angular distance to any desired rotation. Therefore, the comparisons between expected and actual results are performed using an error margin. It is important to realize that the conversion occurs algorthm a design instance.

This can become very tricky, especially with negative numbers and the signed representation. Oldfart 7, 2 8 The resulting transform, Tis coedic below:. I updated the code as output [ Both of these approaches used only a minimum number of clocks, although their precision was somewhat limited. Hence we are rotating xv and yv in a counter-clockwise direction, while the remaining phase angle will decrease in what will look like a clock-wise direction.

First of all, note in algoeithm Verilog output that the convertor infers which variables have to be declared as signed.


We discussed some time ago how to go about this via rounding. It requires only adds, subtracts, and shifts.

Some can ignore the gain. Then, we define the command to start up the Evrilog simulator. With the reset, this will require 1-FF per stage. We will assume that all numbers are stored as verillg fixed-point numbers, with the radix point between the second-most-significant and third-most-significant bits. As the design will perform its calculations in finite precision, there will be rounding errors. The next step is to rotate the xv[0] and yv[0] values through the remaining phase angle, ph[0].

Cordic-based Sine Computer

I am getting this error from days now. Of course, we still need to make sure that the convertor gets it right, which is hard enough. The core will operate cordlc one of two modes: These rotation matrices can be strung together to accomplish many digital logic purposes.

You can find the basic core generator herewithin my cordic repository.