Subversion Repositories wb_dma

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

////                                                             ////

////  WISHBONE DMA Primitives                                    ////

////                                                             ////

////                                                             ////

////  Author: Rudolf Usselmann                                   ////

////          rudi@asics.ws                                      ////

////                                                             ////

////                                                             ////

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

////                                                             ////

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

////                                                             ////

//// Copyright (C) 2001 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: wb_dma_inc30r.v,v 1.1 2001-07-29 08:57:02 rudi Exp $

//

//  $Date: 2001-07-29 08:57:02 $

//  $Revision: 1.1 $

//  $Author: rudi $

//  $Locker:  $

//  $State: Exp $

//

// Change History:

//               $Log: not supported by cvs2svn $

//               Revision 1.2  2001/06/05 10:22:37  rudi

//

//

//               - Added Support of up to 31 channels

//               - Added support for 2,4 and 8 priority levels

//               - Now can have up to 31 channels

//               - Added many configuration items

//               - Changed reset to async

//

//               Revision 1.1.1.1  2001/03/19 13:11:12  rudi

//               Initial Release

//

//

//

`include "wb_dma_defines.v"

module wb_dma_inc30r(clk, in, out);

input           clk;

input   [29:0]   in;

output  [29:0]   out;

// INC30_CENTER indicates the center bit of the 30 bit incrementor

// so it can be easily manually optimized for best performance

parameter       INC30_CENTER = 16;

reg     [INC30_CENTER:0] out_r;

always @(posedge clk)

        out_r <= #1 in[(INC30_CENTER - 1):0] + 1;

assign out[29:INC30_CENTER] = in[29:INC30_CENTER] + out_r[INC30_CENTER];

assign out[(INC30_CENTER - 1):0]  = out_r;

endmodule