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Seven Segment Display design with 2 4-1 MUXes
von Keith F. (Guest)

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I am a tad bit lost with going about how to code this. I was given 2 
types of code to help me with this design but I'm lost at coding the 2 
4-1 MUXes into the SSeg decoder. Any help is greatly appreciated!


Here is the provided coding I was given:
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//Hex to SSeg LED decoder

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module hex_to_sseg

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   (

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    input wire [3:0] hex,

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    input wire dp,

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    output reg [7:0] sseg  // output active low

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   );

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   always @*

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   begin

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      case(hex)

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         4'h0: sseg[6:0] = 7'b0000001;

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         4'h1: sseg[6:0] = 7'b1001111;

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         4'h2: sseg[6:0] = 7'b0010010;

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         4'h3: sseg[6:0] = 7'b0000110;

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         4'h4: sseg[6:0] = 7'b1001100;

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         4'h5: sseg[6:0] = 7'b0100100;

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         4'h6: sseg[6:0] = 7'b0100000;

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         4'h7: sseg[6:0] = 7'b0001111;

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         4'h8: sseg[6:0] = 7'b0000000;

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         4'h9: sseg[6:0] = 7'b0000100;

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         4'ha: sseg[6:0] = 7'b0001000;

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         4'hb: sseg[6:0] = 7'b1100000;

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         4'hc: sseg[6:0] = 7'b0110001;

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         4'hd: sseg[6:0] = 7'b1000010;

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         4'he: sseg[6:0] = 7'b0110000;

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         default: sseg[6:0] = 7'b0111000;  //4'hf

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     endcase

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     sseg[7] = dp;

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   end

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endmodule

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//4-1 Mux

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module mux( select, d, q );

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input[1:0] select;

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input[3:0] d;

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output q;

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reg q;

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wire[1:0] select;

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wire[3:0] d;

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always @( select or d )

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begin

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   if( select == 0)

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      q = d[0];

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   if( select == 1)

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      q = d[1];

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   if( select == 2)

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      q = d[2];

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   if( select == 3)

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      q = d[3];

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end

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endmodule


  


  




  

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    Re: Seven Segment Display design with 2 4-1 MUXes
  


  

    

      von
      
        Lothar M.
            (Company: Titel)
        (lkmiller)
        (Moderator)
      
      


      
    


    

      
    

    

    

  
  


  

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Keith F. wrote:
> Here is the provided coding I was given:
And what did you do yourself already? No one here is intended do do 
all of your homework...

> but I'm lost at coding the 2 4-1 MUXes into the SSeg decoder. Any help
> is greatly appreciated!
Thats the way it works: show your try and tell clearly whats the problem 
with it.

At least you musthave a sketch (on a piece of paper) how you would 
conntect those parts given. Then you can easily recognize, whats 
/missing/: you lack a counter steadily walking thru these 4 segments...

If you don't know it already: this here is obviously the 
Nibble-To-Segment decoder:
1
                  segments:   abcdefg

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         4'h0: sseg[6:0] = 7'b0000001; // 0

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         4'h1: sseg[6:0] = 7'b1001111; // 1

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         4'h2: sseg[6:0] = 7'b0010010; // ....

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         4'h3: sseg[6:0] = 7'b0000110;

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         4'h4: sseg[6:0] = 7'b1001100;

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         4'h5: sseg[6:0] = 7'b0100100;

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         4'h6: sseg[6:0] = 7'b0100000;

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         4'h7: sseg[6:0] = 7'b0001111;

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         4'h8: sseg[6:0] = 7'b0000000;

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         4'h9: sseg[6:0] = 7'b0000100; // 9

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         4'ha: sseg[6:0] = 7'b0001000; // A

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         4'hb: sseg[6:0] = 7'b1100000; // b

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         4'hc: sseg[6:0] = 7'b0110001; // C

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         4'hd: sseg[6:0] = 7'b1000010; // d

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         4'he: sseg[6:0] = 7'b0110000; // E

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         default: sseg[6:0] = 7'b0111000;  // F

And with the other code snippet you can obviously select one value out 
of 4, so that leads to the assumption, that you have 4 digits to 
display...

  


  




  

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