Subversion Repositories dvb_s2_ldpc_decoder

//-------------------------------------------------------------------------

//

// File name    :  ldpc_muxreg.v

// Title        :

//              :

// Purpose      : Just a multiplexer and a register, but I added a level

//              : of hierarchy because design_vision was choking on the

//              : flat version

//

// ----------------------------------------------------------------------

// Revision History :

// ----------------------------------------------------------------------

//   Ver  :| Author   :| Mod. Date   :| Changes Made:

//   v1.0  | JTC      :| 2008/07/02  :|

// ----------------------------------------------------------------------

`timescale 1ns/10ps

module ldpc_muxreg #(

  parameter LLRWIDTH = 4,

  parameter NUMINPS  = 4,

  parameter MUXSIZE  = 4,

  parameter SELBITS  = 2

)(

  input clk,

  input rst,

  input[SELBITS-1:0]          sel,

  input[NUMINPS*LLRWIDTH-1:0] din,

  output[LLRWIDTH-1:0]        dout

);

// convert to 2-d array

wire[LLRWIDTH-1:0] din_2d[MUXSIZE-1:0];

generate

  genvar muxpos;

  for( muxpos=0; muxpos<MUXSIZE; muxpos=muxpos+1 )

  begin: muxto2d

    assign din_2d[muxpos] = din[muxpos*LLRWIDTH+LLRWIDTH-1 -: LLRWIDTH];

  end

endgenerate

// mux and register

reg[LLRWIDTH-1:0] mux_result;

assign dout = mux_result;

always @( posedge clk, posedge rst )

  if( rst )

    mux_result <= 0;

  else

    mux_result <= din_2d[sel];

endmodule