17. Binary to Gray Code Converter

How do you plan to solve it?

module bin2gray4(input [3:0]bin_in, output [3:0]gray_out);
assign gray_out[3] = bin_in[3]; assign gray_out[2]= bin_in[3]^bin_in[2];
assign gray_out[1]= bin_in[2]^bin_in[1]; assign gray_out[0]= bin_in[1]^bin_in[0];
endmodule