initial commit, add dds_par module

common/truncate_manual.v

@@ -0,0 +1,43 @@
+`timescale 1ns / 1ps
+//////////////////////////////////////////////////////////////////////////////////
+// Company:
+// Engineer:
+//
+// Create Date: 04/21/2023 11:37:14 AM
+// Design Name:
+// Module Name: truncate_manual
+// Project Name:
+// Target Devices:
+// Tool Versions:
+// Description:
+//
+// Dependencies:
+//
+// Revision:
+// Revision 0.01 - File Created
+// Additional Comments:
+//
+//////////////////////////////////////////////////////////////////////////////////
+
+
+module truncate_manual
+#(
+    DATA_I_WIDTH = 30,
+    DATA_O_WIDTH = 12
+)
+(
+    input clk,
+    input rst,
+
+    input [DATA_I_WIDTH-1 : 0] data_in,
+    input data_in_valid,
+
+    input [$clog2(DATA_I_WIDTH)-1 : 0] trunc_pos,
+
+    output [DATA_O_WIDTH-1 : 0] data_out,
+    output data_out_valid
+);
+
+assign data_out = data_in[trunc_pos -: DATA_O_WIDTH];
+
+endmodule