OpenCores
URL https://opencores.org/ocsvn/sqmusic/sqmusic/trunk

Subversion Repositories sqmusic

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    /
    from Rev 11 to Rev 12
    ↔ Reverse comparison
  •

Rev 11 → Rev 12

/sqmusic/trunk/memos/sintable.cc
0,0 → 1,12
#include <iostream>
#include <cmath>
 
using namespace std;
 
int main(void) {
const double pi = 3.141592654;
const double factor = pi / 1024;
for(double i=0; i<1024; i++ )
cout << sin( (2*i+1)*factor ) << "\n";
return 0;
}
/sqmusic/trunk/memos/sin.txt
0,0 → 1,1024
0.00306796
0.00920375
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/sqmusic/trunk/sqm/sq_pg.v
0,0 → 1,46
module sq_pg(
input clk,
input reset_n,
input [10:0] fnumber,
input [2:0] block,
input [3:0] multiple,
output [9:0]phase );
 
reg [19:0] count;
assign phase = count[19:10];
 
wire [19:0]fmult;
 
always @(*) begin
case( multiple )
4'b0: fmult = (phase << block) >> 1'b1;
default: fmult = (phase<<block)*multiple;
endcase
end
 
always @(posedge clk or negedge reset_n ) begin
if( !reset_n )
count <= 20'b0;
else begin
count <= count + fmult;
end
end
 
endmodule
 
module sq_sin(
// input clk,
// input reset_n,
input [9:0]phase,
output [19:0] val
)
 
reg [19:0] sin_table[1023:0];
 
initial begin
$readmemh("sin_table.hex", sin_table);
end
 
assign val = sin_table[phase];
 
end

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