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//////////////////////////////////////////////////////////////////////////////////
// Company: HDLForBeginners
// Engineer: Stacey
//
// Create Date: 14.07.2021 13:47:50
// Design Name: lfsr_4bit
// Module Name: lfsr_4bit_top
// Project Name: lfsr_4bit
// Target Devices:
// Tool Versions:
// Description:
// Increments a counter and and drives an output gpio pin
//
// Dependencies:
//
// Revision:
// Revision 0.01 - File Created
// Additional Comments:
//
//////////////////////////////////////////////////////////////////////////////////
module lfsr_4bit_top(
input clk,
input rst,
output logic led
);
logic [3:0] lfsr;
always @(posedge clk)
begin
if(rst) begin
lfsr <= 4'b1111;
end
else begin
lfsr[3] <= lfsr[2];
lfsr[2] <= lfsr[1];
lfsr[1] <= lfsr[0];
lfsr[0] <= lfsr[2]^lfsr[3];
end
end
assign led = (lfsr > 4'd10) ? 1'b1 : 1'b0;
endmodule
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