/*                                                                      
 Copyright 2020 Blue Liang, liangkangnan@163.com
                                                                         
 Licensed under the Apache License, Version 2.0 (the "License");         
 you may not use this file except in compliance with the License.        
 You may obtain a copy of the License at                                 
                                                                         
     http://www.apache.org/licenses/LICENSE-2.0                          
                                                                         
 Unless required by applicable law or agreed to in writing, software    
 distributed under the License is distributed on an "AS IS" BASIS,       
 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 See the License for the specific language governing permissions and     
 limitations under the License.                                          
 */

// 将输入打DP拍后输出
module gen_ticks_sync #(
    parameter DP = 2,
    parameter DW = 32)(

    input wire rst_n,
    input wire clk,

    input wire[DW-1:0] din,
    output wire[DW-1:0] dout

    );

    wire[DW-1:0] sync_dat[DP-1:0];

    genvar i;

    generate 
        for (i = 0; i < DP; i = i + 1) begin: ticks_sync
            if (i == 0) begin: dp_is_0
                gen_rst_0_dff #(DW) rst_0_dff(clk, rst_n, din, sync_dat[0]);
            end else begin: dp_is_not_0
                gen_rst_0_dff #(DW) rst_0_dff(clk, rst_n, sync_dat[i-1], sync_dat[i]);
            end
        end
    endgenerate

    if (DP > 0) begin: dp_gt_0
        assign dout = sync_dat[DP-1];
    end else begin: dp_eq_0
        assign dout = din;
    end

endmodule