status_router4.v

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`timescale 1ns/1ps

module  status_router4(
    input        rst,
    input        clk,
    input        srst, // @ posedge clk
    // 4 input channels 
    input [7:0]  db_in0,
    input        rq_in0,
    output       start_in0, // only for the first cycle, combinatorial
    input [7:0]  db_in1,
    input        rq_in1,
    output       start_in1, // only for the first cycle, combinatorial
    input [7:0]  db_in2,
    input        rq_in2,
    output       start_in2, // only for the first cycle, combinatorial
    input [7:0]  db_in3,
    input        rq_in3,
    output       start_in3, // only for the first cycle, combinatorial
    // output (multiplexed) channel
    output [7:0] db_out,
    output       rq_out,
    input        start_out  // only for the first cycle, combinatorial
);

    wire   [7:0] db_int [1:0];
    wire   [1:0] rq_int;
    wire   [1:0] start_int;  // only for the first cycle, combinatorial

    status_router2  #(
        .FIFO_TYPE ("TWO_CYCLE") //= "ONE_CYCLE" // higher latency, but easier timing - use on some levels (others - default "ONE_CYCLE")
    ) status_router2_top_i (
        .rst       (rst), // input
        .clk       (clk), // input
        .srst      (srst), // input
        .db_in0    (db_int[0]), // input[7:0] 
        .rq_in0    (rq_int[0]), // input
        .start_in0 (start_int[0]), // output
        .db_in1    (db_int[1]), // input[7:0] 
        .rq_in1    (rq_int[1]), // input
        .start_in1 (start_int[1]), // output
        .db_out    (db_out), // output[7:0] 
        .rq_out    (rq_out), // output
        .start_out (start_out) // input
    );

    status_router2 status_router2_01_i (
        .rst       (rst), // input
        .clk       (clk), // input
        .srst      (srst), // input
        .db_in0    (db_in0), // input[7:0] 
        .rq_in0    (rq_in0), // input
        .start_in0 (start_in0), // output
        .db_in1    (db_in1), // input[7:0] 
        .rq_in1    (rq_in1), // input
        .start_in1 (start_in1), // output
        .db_out    (db_int[0]), // output[7:0] 
        .rq_out    (rq_int[0]), // output
        .start_out (start_int[0]) // input
    );

    status_router2 status_router2_23_i (
        .rst       (rst), // input
        .clk       (clk), // input
        .srst      (srst), // input
        .db_in0    (db_in2), // input[7:0] 
        .rq_in0    (rq_in2), // input
        .start_in0 (start_in2), // output
        .db_in1    (db_in3), // input[7:0] 
        .rq_in1    (rq_in3), // input
        .start_in1 (start_in3), // output
        .db_out    (db_int[1]), // output[7:0] 
        .rq_out    (rq_int[1]), // output
        .start_out (start_int[1]) // input
    );



endmodule