Subversion Repositories ahb_slave

/////////////////////////////////////////////////////////////////////

////                                                             ////

////  Author: Eyal Hochberg                                      ////

////          eyal@provartec.com                                 ////

////                                                             ////

////  Downloaded from: http://www.opencores.org                  ////

/////////////////////////////////////////////////////////////////////

////                                                             ////

//// Copyright (C) 2010 Provartec LTD                            ////

//// www.provartec.com                                           ////

//// info@provartec.com                                          ////

////                                                             ////

//// This source file may be used and distributed without        ////

//// restriction provided that this copyright statement is not   ////

//// removed from the file and that any derivative work contains ////

//// the original copyright notice and the associated disclaimer.////

////                                                             ////

//// This source file is free software; you can redistribute it  ////

//// and/or modify it under the terms of the GNU Lesser General  ////

//// Public License as published by the Free Software Foundation.////

////                                                             ////

//// This source is distributed in the hope that it will be      ////

//// useful, but WITHOUT ANY WARRANTY; without even the implied  ////

//// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR     ////

//// PURPOSE.  See the GNU Lesser General Public License for more////

//// details. http://www.gnu.org/licenses/lgpl.html              ////

////                                                             ////

/////////////////////////////////////////////////////////////////////

OUTFILE PREFIX_mem.v

INCLUDE def_ahb_slave.txt

ITER BX EXPR(DATA_BITS/8)

module PREFIX_mem (PORTS);

   parameter                    MEM_WORDS = EXPR((2^ADDR_BITS)/(DATA_BITS/8));

   parameter                    ADDR_LSB  = LOG2(EXPR(DATA_BITS/8));

   input                        clk;

   input                        reset;

   revport                      GROUP_STUB_MEM;

   reg [DATA_BITS-1:0]          Mem [MEM_WORDS-1:0];

   reg [DATA_BITS-1:0]          DOUT;

   wire [DATA_BITS-1:0]         BitSEL;

   wire [ADDR_BITS-1:ADDR_LSB]  ADDR_WR_word = ADDR_WR[ADDR_BITS-1:ADDR_LSB];

   wire [ADDR_BITS-1:ADDR_LSB]  ADDR_RD_word = ADDR_RD[ADDR_BITS-1:ADDR_LSB];

   assign                       BitSEL = {CONCAT({8{BSEL[BX]}} ,)};

   always @(posedge clk)

     if (WR)

       Mem[ADDR_WR_word] <= #FFD (Mem[ADDR_WR_word] & ~BitSEL) | (DIN & BitSEL);

   always @(posedge clk or posedge reset)

     if (reset)

       DOUT <= #FFD {DATA_BITS{1'b0}};

     else if (RD)

       DOUT <= #FFD Mem[ADDR_RD_word];

endmodule