///////////////////////////////////////////////////////////////////// //// //// //// USB function core primitives //// //// This file contains all technology dependent primitives //// //// such as SSRAMs. //// //// //// //// Author: Rudolf Usselmann //// //// rudi@asics.ws //// //// //// //// //// //// Downloaded from: http://www.opencores.org/cores/usb/ //// //// //// ///////////////////////////////////////////////////////////////////// //// //// //// Copyright (C) 2000 Rudolf Usselmann //// //// rudi@asics.ws //// //// //// //// 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 SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY //// //// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED //// //// TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS //// //// FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL THE AUTHOR //// //// OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, //// //// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES //// //// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE //// //// GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR //// //// BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF //// //// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT //// //// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT //// //// OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE //// //// POSSIBILITY OF SUCH DAMAGE. //// //// //// ///////////////////////////////////////////////////////////////////// // CVS Log // // $Id: primitives.v,v 1.0 2001/03/07 09:17:12 rudi Exp $ // // $Date: 2001/03/07 09:17:12 $ // $Revision: 1.0 $ // $Author: rudi $ // $Locker: $ // $State: Exp $ // // Change History: // $Log: primitives.v,v $ // Revision 1.0 2001/03/07 09:17:12 rudi // // // Changed all revisions to revision 1.0. This is because OpenCores CVS // interface could not handle the original '0.1' revision .... // // Revision 0.1.0.1 2001/02/28 08:11:11 rudi // Initial Release // // `include "usb_defines.v" /////////////////////////////////////////////////////////////////// // // SSRAM Model // /////////////////////////////////////////////////////////////////// module ssram( clk, rst, radr, rdin, rdout, rre, rwe ); input clk, rst; input [14:0] radr; input [31:0] rdin; output [31:0] rdout; input rre, rwe; /////////////////////////////////////////////////////////////////// // // Local Wires and Registers // reg [31:0] mem[0:8192]; reg [31:0] rdout; wire [11:0] adr_i = radr[11:0]; /////////////////////////////////////////////////////////////////// // // Memory Logic // //always @(posedge clk) // if(rst & rwe) mem[adr_i] <= #1 rdin; always @(posedge clk) if(rst & rre) rdout <= #1 mem[adr_i]; endmodule