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