simul_clk_div_mult.v 2.77 KB
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/*!
 * <b>Module:</b>simul_clk_div_mult
 * @file simul_clk_div_mult.v
 * @date 2015-10-12  
 * @author Andrey Filippov     
 *
 * @brief Simulation clock rational multiplier
 *
 * @copyright Copyright (c) 2015 Elphel, Inc .
 *
 * <b>License:</b>
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 *
 * simul_clk_div_mult.v 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, or
 * (at your option) any later version.
 *
 *  simul_clk_div_mult.v 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/> .
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 *
 * Additional permission under GNU GPL version 3 section 7:
 * If you modify this Program, or any covered work, by linking or combining it
 * with independent modules provided by the FPGA vendor only (this permission
 * does not extend to any 3-rd party modules, "soft cores" or macros) under
 * different license terms solely for the purpose of generating binary "bitstream"
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 * files and/or simulating the code, the copyright holders of this Program give
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 * you the right to distribute the covered work without those independent modules
 * as long as the source code for them is available from the FPGA vendor free of
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 * charge, and there is no dependence on any encrypted modules for simulating of
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 * the combined code. This permission applies to you if the distributed code
 * contains all the components and scripts required to completely simulate it
 * with at least one of the Free Software programs.
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 */
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`timescale 1ns/1ps

module  simul_clk_div_mult#(
        parameter MULTIPLIER = 3,
        parameter DIVISOR =    5,
        parameter SKIP_FIRST = 5
    ) (
        input      clk_in,
        input      en,
        output     clk_out
);
    wire clk_int;
    generate
        if (DIVISOR > 1) 
            sim_clk_div #(
                .DIVISOR   (DIVISOR)
            ) sim_clk_div_i (
                .clk_in   (clk_in), // input
                .en       (en), // input
                .clk_out  (clk_int) // output
            );
        else
            assign clk_int = clk_in;
    endgenerate
    generate
        if (MULTIPLIER > 1) 
            simul_clk_mult #(
                .MULTIPLIER (MULTIPLIER),
                .SKIP_FIRST (SKIP_FIRST)
            ) simul_clk_mult_i (
                .clk_in  (clk_int), // input
                .en      (en), // input
                .clk_out (clk_out) // output
            );
        else
            assign clk_out = clk_int;
    endgenerate
endmodule