module hex_7seg(hex,LED);

//HEX-to-seven-segment decoder with enable input

   input [3:0] hex;
   output [6:0] LED;
   reg [6:0] LED;

// segment encoding
//      0
//     --
//  5 |   | 1
//     -6-
//  4 |   | 2
//     --
//      3

always @(hex)
begin
   case (hex)
       4'b0000 : LED = 7'b1000000;   //0
       4'b0001 : LED = 7'b1111001;   //1
       4'b0010 : LED = 7'b0100100;   //2
       4'b0011 : LED = 7'b0110000;   //3
       4'b0100 : LED = 7'b0011001;   //4
       4'b0101 : LED = 7'b0010010;   //5
       4'b0110 : LED = 7'b0000010;   //6
       4'b0111 : LED = 7'b1111000;   //7
       4'b1000 : LED = 7'b0000000;   //8
       4'b1001 : LED = 7'b0010000;   //9
       4'b1010 : LED = 7'b0001000;   //A
       4'b1011 : LED = 7'b0000011;   //b
       4'b1100 : LED = 7'b1000110;   //C
       4'b1101 : LED = 7'b0100001;   //d
       4'b1110 : LED = 7'b0000110;   //E
       4'b1111 : LED = 7'b0001110;   //F

    endcase
end

endmodule