Subversion Repositories round_robin_arbiter

module tb();

reg clk;

reg req0;

reg req1;

reg req2;

reg req3;

reg rst_an;

round_robin_arbiter dut (

        .req({req3,req2,req1,req0}),

        .grant({grant3,grant2,grant1,grant0}),

        .clk(clk),

        .rst_an(rst_an)

);

initial

begin

        clk = 0;

        req3 = 0;

        req2 = 0;

        req1 = 0;

        req0 = 0;

        rst_an = 1'b1;

        #10 rst_an = 0;

        #10 rst_an = 1;

        repeat (1) @ (posedge clk);

        req0 <= 1;

        repeat (1) @ (posedge clk);

        req0 <= 0;

        repeat (1) @ (posedge clk);

        req0 <= 1;

        req1 <= 1;

        repeat (1) @ (posedge clk);

        req2 <= 1;

        req1 <= 0;

        repeat (1) @ (posedge clk);

        req3 <= 1;

        req2 <= 0;

        repeat (1) @ (posedge clk);

        req3 <= 0;

        repeat (1) @ (posedge clk);

        req0 <= 0;

        repeat (1) @ (posedge clk);

        #10  $finish;

end

always  #1 clk = ~clk;

endmodule