Subversion Repositories dvb_s2_ldpc_decoder

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

//

// File name    :  ldpc_ram_behav.v

// Title        :

//              :

// Purpose      : RAM behavioral model

//

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

// Revision History :

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

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

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

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

`timescale 1ns/10ps

module ldpc_ram_behav #(

  parameter WIDTH     = 4,

  parameter LOG2DEPTH = 4

)(

  input                clk,

  input                we,

  input[WIDTH-1:0]     din,

  input[LOG2DEPTH-1:0] wraddr,

  input[LOG2DEPTH-1:0] rdaddr,

  output[WIDTH-1:0]    dout

);

reg[WIDTH-1:0]     storage[0:2**LOG2DEPTH -1];

reg[LOG2DEPTH-1:0] addr_del;

reg[WIDTH-1:0]     dout_int;

assign dout = dout_int;

always @( posedge clk )

begin

  if( !we )

    storage[wraddr] <= din;

  addr_del <= rdaddr;

  dout_int <= storage[addr_del];

end

endmodule