cordic/settings_pkg.sv at master · alinaivanovaoff/cordic · GitHub

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//-----------------------------------------------------------------------------
// Original Author: Alina Ivanova
// email: alina.al.ivanova@gmail.com
// web: www.alinaivanovaoff.com
// settings_pkg.sv
// Created: 10.26.2016
//
// Settings package.
//
//-----------------------------------------------------------------------------
// Copyright (c) 2016 by Alina Ivanova
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.
//-----------------------------------------------------------------------------
//`include "functions_pkg.sv"
//-----------------------------------------------------------------------------
package settings_pkg;
    import functions_pkg::*;
//-----------------------------------------------------------------------------
// Parameter Declaration(s)
//-----------------------------------------------------------------------------
    parameter INT_SIZE                        = 16;
    parameter FRAC_SIZE                       = 16;
    parameter DATA_SIZE                       = INT_SIZE + FRAC_SIZE;
//-----------------------------------------------------------------------------
    parameter STAGES                          = 32;
    parameter EXTRA_BITS                      = clog2(STAGES);
    parameter FULL_SIZE                       = DATA_SIZE + EXTRA_BITS;
//-----------------------------------------------------------------------------
    parameter K_STAGES                        = 9;
    parameter logic [FULL_SIZE-1:0] K_SCALED [K_STAGES] = '{
        0.70711 * ({{FULL_SIZE-2{1'b0}}, 1'b1} << FRAC_SIZE),
        0.63246 * ({{FULL_SIZE-2{1'b0}}, 1'b1} << FRAC_SIZE),
        0.61357 * ({{FULL_SIZE-2{1'b0}}, 1'b1} << FRAC_SIZE),
        0.60883 * ({{FULL_SIZE-2{1'b0}}, 1'b1} << FRAC_SIZE),
        0.60765 * ({{FULL_SIZE-2{1'b0}}, 1'b1} << FRAC_SIZE),
        0.60735 * ({{FULL_SIZE-2{1'b0}}, 1'b1} << FRAC_SIZE),
        0.60728 * ({{FULL_SIZE-2{1'b0}}, 1'b1} << FRAC_SIZE),
        0.60726 * ({{FULL_SIZE-2{1'b0}}, 1'b1} << FRAC_SIZE),
        0.60725 * ({{FULL_SIZE-2{1'b0}}, 1'b1} << FRAC_SIZE)};
//-----------------------------------------------------------------------------
    parameter T                               = 57.29578;
    parameter logic [FULL_SIZE-1:0] T_SCALED  = T * ({{FULL_SIZE-2{1'b0}}, 1'b1} << FRAC_SIZE);
//-----------------------------------------------------------------------------
    parameter TAN_STAGES                      = 19;
    parameter logic [FULL_SIZE-1:0] TAN_SCALED [TAN_STAGES] = '{
        0.78540 * ({{FULL_SIZE-2{1'b0}}, 1'b1} << FRAC_SIZE),
        0.46365 * ({{FULL_SIZE-2{1'b0}}, 1'b1} << FRAC_SIZE),
        0.24498 * ({{FULL_SIZE-2{1'b0}}, 1'b1} << FRAC_SIZE),
        0.12435 * ({{FULL_SIZE-2{1'b0}}, 1'b1} << FRAC_SIZE),
        0.06242 * ({{FULL_SIZE-2{1'b0}}, 1'b1} << FRAC_SIZE),
        0.03124 * ({{FULL_SIZE-2{1'b0}}, 1'b1} << FRAC_SIZE),
        0.01562 * ({{FULL_SIZE-2{1'b0}}, 1'b1} << FRAC_SIZE),
        0.00781 * ({{FULL_SIZE-2{1'b0}}, 1'b1} << FRAC_SIZE),
        0.00391 * ({{FULL_SIZE-2{1'b0}}, 1'b1} << FRAC_SIZE),
        0.00195 * ({{FULL_SIZE-2{1'b0}}, 1'b1} << FRAC_SIZE),
        0.00098 * ({{FULL_SIZE-2{1'b0}}, 1'b1} << FRAC_SIZE),
        0.00049 * ({{FULL_SIZE-2{1'b0}}, 1'b1} << FRAC_SIZE),
        0.00024 * ({{FULL_SIZE-2{1'b0}}, 1'b1} << FRAC_SIZE),
        0.00012 * ({{FULL_SIZE-2{1'b0}}, 1'b1} << FRAC_SIZE),
        0.00006 * ({{FULL_SIZE-2{1'b0}}, 1'b1} << FRAC_SIZE),
        0.00003 * ({{FULL_SIZE-2{1'b0}}, 1'b1} << FRAC_SIZE),
        0.00002 * ({{FULL_SIZE-2{1'b0}}, 1'b1} << FRAC_SIZE),
        0.00001 * ({{FULL_SIZE-2{1'b0}}, 1'b1} << FRAC_SIZE),
        0.00000 * ({{FULL_SIZE-2{1'b0}}, 1'b1} << FRAC_SIZE)};
//-----------------------------------------------------------------------------
    parameter PI_2                            = 1.57079;
    parameter PI_2_SCALED                     = PI_2 * ({{FULL_SIZE-2{1'b0}}, 1'b1} << FRAC_SIZE);
//-----------------------------------------------------------------------------
endpackage: settings_pkg