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90 lines
2.5 KiB
Verilog
90 lines
2.5 KiB
Verilog
/* This file is part of JT12.
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JT12 is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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JT12 is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with JT12. If not, see <http://www.gnu.org/licenses/>.
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Author: Jose Tejada Gomez. Twitter: @topapate
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Version: 1.0
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Date: 2-11-2018
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Based on information posted by Nemesis on:
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http://gendev.spritesmind.net/forum/viewtopic.php?t=386&postdays=0&postorder=asc&start=167
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100% compared with Alexey Khokholov (Nuke.YKT) work with identical results.
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*/
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module jt12_pg_comb(
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input [ 2:0] block,
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input [10:0] fnum,
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// Phase Modulation
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input [ 4:0] lfo_mod,
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input [ 2:0] pms,
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// output [ 7:0] pm_out,
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// Detune
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input [ 2:0] detune,
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output [ 4:0] keycode,
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output signed [5:0] detune_out,
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// Phase increment
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output [16:0] phinc_out,
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// Phase add
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input [ 3:0] mul,
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input [19:0] phase_in,
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input pg_rst,
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// input signed [7:0] pm_in,
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input signed [5:0] detune_in,
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input [16:0] phinc_in,
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output [19:0] phase_out,
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output [ 9:0] phase_op
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);
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wire signed [8:0] pm_offset;
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/* pm, pg_dt and pg_inc operate in parallel */
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jt12_pm u_pm(
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.lfo_mod ( lfo_mod ),
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.fnum ( fnum ),
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.pms ( pms ),
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.pm_offset ( pm_offset )
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);
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jt12_pg_dt u_dt(
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.block ( block ),
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.fnum ( fnum ),
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.detune ( detune ),
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.keycode ( keycode ),
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.detune_signed( detune_out )
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);
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jt12_pg_inc u_inc(
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.block ( block ),
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.fnum ( fnum ),
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.pm_offset ( pm_offset ),
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.phinc_pure ( phinc_out )
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);
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// pg_sum uses the output from the previous blocks
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jt12_pg_sum u_sum(
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.mul ( mul ),
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.phase_in ( phase_in ),
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.pg_rst ( pg_rst ),
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.detune_signed ( detune_in ),
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.phinc_pure ( phinc_in ),
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.phase_out ( phase_out ),
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.phase_op ( phase_op )
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);
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endmodule // jt12_pg_comb
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