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// ============================================================================

// (C) 2007 Robert Finch

// All Rights Reserved.

//

//      counter.v

//              generic up counter

//

// 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, either version 3 of the License, or     

// (at your option) any later version.                                      

//                                                                          

// This source file 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 General Public License for more details.                             

//                                                                          

// You should have received a copy of the GNU General Public License        

// along with this program.  If not, see <http://www.gnu.org/licenses/>.    

//                                                                          

// ============================================================================

//

module counter(rst, clk, ce, ld, d, q, tc);

parameter WID=8;

parameter pMaxCnt={WID{1'b1}};

input rst;

input clk;

input ce;

input ld;

input [WID:1] d;

output [WID:1] q;

reg [WID:1] q;

output tc;

assign tc = &q;

always @(posedge clk)

if (rst)

        q <= 1'b0;

else if (ce) begin

        if (ld)

                q <= d;

        else if (tc)

                q <= 1'b0;

        else

                q <= q + 1'b1;

end

endmodule