professor gives code below. , have figure out why never stop.
module tb_problem1();
reg a, b, c, d, e; wire x; reg [4:0] ins; problem1 dut(a, b, c, d, e, x); initial begin ins = 0; while(ins < 32) begin {a, b, c, d, e} = ins; #20; ins = ins + 1; end end endmodule is because need ins = ins+1'b1; ?
a 5-bit unsigned value supports range 0 31. adding 1 31 drop msb , return 0. therefore value of 32 never reached.
try making ins 6-bit value.
