//this module is the fenji ,if out is 1 fenji have problem,if out is 0 fenji have no problem 
module fenji(
            clk,
            rst,
            in,
            out
            );

input clk;
input rst;
input in;
output out;

always @(posedge clk or negedge rst)
begin
     if(!rst)
     out<=1'b0;
else out<=in;
end
endmodule