nBitJohnsonCounter.v

////////////////////////////////////////////////////////////////////////
//
// Copyright (C) 2020 Akilesh Kannan <akileshkannan@gmail.com>
//
// File: nBitJohnsonCounter.v
// Modified: 2020-07-16
// Description: N-Bit Johnson Counter
//
//
// License: MIT
//
////////////////////////////////////////////////////////////////////////

`default_nettype None

`timescale 1ns/1ps

module nBitJohnsonCounter #(parameter integer n = 8) (output reg[n-1:0] JC, input clk);

    //  initially feed in 1 to register
    initial begin
        JC = 1;
    end

    // every clock edge, shift the bit to right nd connect inverted o/p of last to i/p of first
    always @(posedge clk) begin
        JC = {~JC[0], JC[n-1:1]};
    end
endmodule