# CORDIC ALGORITHM IN VERILOG PDF

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. Author: Dairn Julkis Country: Suriname Language: English (Spanish) Genre: Love Published (Last): 4 March 2011 Pages: 286 PDF File Size: 9.85 Mb ePub File Size: 20.49 Mb ISBN: 999-7-72946-664-5 Downloads: 33665 Price: Free* [*Free Regsitration Required] Uploader: Megami In MyHDL, a single type does it all – the intbv class.

## Cordic-based Sine Computer

We discussed some time ago how to go about this via rounding. T is also something that is easy to calculate within an FPGA.

The reason is that the convertible subset is much less restrictive. We will first write a unit test for the design. It cordjc only adds, subtracts, and shifts. The number of stages and the number of bits in each stage can both be defined based upon arguments to the core generator program. This mode seeks to reduce the angle. Rotating to zero The next step is to rotate the xv and yv values through the remaining phase angle, ph.

This is what we are going to try to build today.

### Computing sin & cos in hardware with synthesisable Verilog

By filling in the parameters of the bench function, we can construct an verulog test bench that runs a simulation, as follows:. Our first problem, therefore is going to be rotating our incoming vector so that any remaining rotation amount is 45 degrees or less. To represent the numbers, we use the intbv class, which is basically an integer-like type with bit-vector capabilities.

HYDAC DF PDF Here is my code to compute sine and cosine of the input angle using cordic algorithm:. One would therefore expect a similar feature in other HDLs. As the design will perform its calculations in finite precision, there will be rounding errors. Anyway, the cast is an additional safety net.

## Computing sin & cos in hardware with synthesisable Verilog

Note that outside the generator function, we calculate some data such as the X0 constant, and the look-up table of elementary arctangents, represented by the angles tuple. This define determines the number of bits used to represent the angle.

The dual nature of this class comes in very handy. You need to rotate the original vector by some multiple of ninety degree angles until the remaining rotation angle is less than forty five degrees. The user can change the number of bits that represent the x,y, and theta values. As long as the code inside them obeys the constraints of the convertible subset, the design instance can always be converted to Verilog.

We may want to use the test bench for designs with different characteristics; therefore, the error margin is made a parameter.

### Cordic Algorithm using Verilog – Electrical Engineering Stack Exchange

With the underlying two’s complement representation, it works for positive and negative values of y. In addition to the Verilog code for the design coddic, it also generates a Verilog test bench stub that defines an interface between the Verilog design and a Cosimulation object.