Using remotesyn and added NCO

rtl/core/nco_q15_funcs.vh

@@ -0,0 +1,24 @@
+// ==========================================================
+// Helper: FTW function (compile-time or runtime call)
+//   FTW = round( f_hz * 2^PHASE_BITS / FS_HZ )
+// Notes:
+// - Accepts integer Hz.
+// - Uses 64-bit math to avoid overflow for typical params.
+// - Can be called from a testbench or combinational logic that
+//   prepares 'ftw_in' before asserting 'ftw_we'.
+// Example:
+//   initial begin
+//     #1;
+//     $display("FTW 1kHz = 0x%08x", ftw_from_hz(1000));
+//   end
+// ==========================================================
+function [31:0] ftw_from_hz;
+  input integer f_hz;
+  input integer phase_bits;
+  input integer fs_hz;
+  reg   [63:0] numer;
+  begin
+    numer       = ((64'd1 << phase_bits) * f_hz) + (fs_hz/2);
+    ftw_from_hz = numer / fs_hz;
+  end
+endfunction