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[/] [sqmusic/] [trunk/] [sqm/] [sq_pg.v] - Diff between revs 12 and 16
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/*
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SQmusic
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(c) Jose Tejada Gomez, 9th May 2013
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You can use this file following the GNU GENERAL PUBLIC LICENSE version 3
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Read the details of the license in:
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http://www.gnu.org/licenses/gpl.txt
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Send comments to: jose.tejada@ieee.org
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*/
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module sq_pg(
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module sq_pg(
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input clk,
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input clk,
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input reset_n,
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input reset_n,
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input [10:0] fnumber,
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input [10:0] fnumber,
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input [2:0] block,
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input [2:0] block,
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input [3:0] multiple,
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input [3:0] multiple,
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output [9:0]phase );
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output [9:0]phase );
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reg [19:0] count;
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reg [19:0] count;
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assign phase = count[19:10];
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assign phase = count[19:10];
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wire [19:0]fmult;
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wire [19:0]fmult;
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always @(*) begin
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always @(*) begin
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case( multiple )
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case( multiple )
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4'b0: fmult = (phase << block) >> 1'b1;
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4'b0: fmult = (phase << block) >> 1'b1;
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default: fmult = (phase<<block)*multiple;
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default: fmult = (phase<<block)*multiple;
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endcase
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endcase
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end
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end
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always @(posedge clk or negedge reset_n ) begin
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always @(posedge clk or negedge reset_n ) begin
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if( !reset_n )
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if( !reset_n )
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count <= 20'b0;
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count <= 20'b0;
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else begin
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else begin
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count <= count + fmult;
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count <= count + fmult;
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end
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end
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end
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end
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endmodule
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endmodule
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module sq_sin(
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module sq_sin(
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// input clk,
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// input clk,
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// input reset_n,
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// input reset_n,
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input [9:0]phase,
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input [9:0]phase,
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output [19:0] val
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output [19:0] val
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)
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)
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reg [19:0] sin_table[1023:0];
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reg [19:0] sin_table[1023:0];
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initial begin
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initial begin
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$readmemh("sin_table.hex", sin_table);
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$readmemh("sin_table.hex", sin_table);
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end
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end
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assign val = sin_table[phase];
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assign val = sin_table[phase];
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end
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end
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