RE: I was wondering where I went wrong

Joseph J. OP #4377830
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module display (clock, AN0, AN1, AN2, AN3, CA, CB, CC, CD, CE, CF, CG, CDP);

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//USED FOR SEVEN SEG

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input clock;

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output AN0, AN1, AN2, AN3, CA, CB, CC, CD, CE, CF, CG, CDP;

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reg [7:0] cathodedata; //cathode data

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reg [3:0] anodedata; //anode data

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reg [2:0] digit = 1;

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reg [6:0] data;

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reg setdp;

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reg [19:0] counter = 0;

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assign CA = cathodedata [7];

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assign CB = cathodedata [6];

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assign CC = cathodedata [5];

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assign CD = cathodedata [4];

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assign CE = cathodedata [3];

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assign CF = cathodedata [2];

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assign CG = cathodedata [1];

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assign CDP = cathodedata [0];

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assign AN3 = anodedata [3];

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assign AN2 = anodedata [2];

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assign AN1 = anodedata [1];

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assign AN0 = anodedata [0];

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//USED FOR SEVEN SEG

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    //Multiplexing

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    //Board Clock: 50MHz

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    //p = t*f

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    //t = 16ms

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    //p = 16ms * 50*10^6 = 800,000 cycles

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    //200,000 cycles for each digit

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    //Refreshed every 16ms (~60Hz)

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always@(negedge clock)

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begin

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    if (digit == 1)

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        begin

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            if (counter == 200000)

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                begin

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                    digit = 2;

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                end

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            else

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                begin

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                counter = counter + 1;

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                data = 4;

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                end

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        end

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    else if (digit == 2)

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        begin

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            if (counter == 400000)

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                begin

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                    digit = 3;

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                end

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            else

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                begin

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                    counter = counter + 1;

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                    data = 3;

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                end

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        end

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    else if (digit == 3)

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        begin

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            if (counter == 600000)

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                begin

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                    digit = 4;

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                end

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            else

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                begin

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                    counter = counter + 1;

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                    data = 2;

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                end

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        end

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    else if (digit == 4)

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        begin

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            if (counter == 800000)

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                begin

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                    digit = 1;

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                    counter = 0;

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                end 

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            else

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                begin

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                    counter = counter + 1;

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                    data = 1;

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                end

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        end 

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end

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always @ (*)

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begin

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    case (data)

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        6'd0: cathodedata = 8'b00000011; //0

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        6'd1: cathodedata = 8'b10011111; //1

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        6'd2: cathodedata = 8'b00100101; //2

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        6'd3: cathodedata = 8'b00001101; //3

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        6'd4: cathodedata = 8'b10011001; //4

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        6'd5: cathodedata = 8'b01001001; //5

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        6'd6: cathodedata = 8'b01000001; //6

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        6'd7: cathodedata = 8'b00011111; //7

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        6'd8: cathodedata = 8'b00000001; //8

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        6'd9: cathodedata = 8'b00001001; //9

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        6'd10: cathodedata = 8'b00010001; //A

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        6'd11: cathodedata = 8'b11000001; //B

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        6'd12: cathodedata = 8'b01100011; //C

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        6'd13: cathodedata = 8'b10000101; //D

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        6'd14: cathodedata = 8'b00100001; //E

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        6'd15: cathodedata = 8'b01110001; //F

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        default: cathodedata = 8'b11111111; //default all off

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    endcase

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    if (setdp == 1) //decimal point

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        cathodedata = cathodedata & 8'hFE;

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    case(digit)

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        0: anodedata = 4'b1111; //all OFF

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        4: anodedata = 4'b1110; //AN0

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        3: anodedata = 4'b1101; //AN1

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        2: anodedata = 4'b1011; //AN2

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        1: anodedata = 4'b0111; //AN3

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        default:

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        anodedata = 4'b1111; //all OFF

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    endcase

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end 

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endmodule


I am using a Nexys 2 digilent board with Xilinix and I just want to turn 
the seven seg display on as a countdown
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Joseph J. OP #4377833
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I was wondering in the code what the anode data would be in order to get 
the lights to turn on I am so very confused

1
module seven_seg( intput [3:0]numbers, output reg[6:0] display);

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always @(numbers)

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  begin  

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    case(numbers)

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      4'h0: out1=7'b1000000;  //0111111;

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      4'h1:  out1=7'b1111001;  //0000110;

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      4'h2:  out1=7'b0100100;  //1011011;

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      4'h3: out1=7'b0110000;  //1001111;

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      4'h4: out1=7'b0011001;  //1100110;

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      4'h5: out1=7'b0010010;  //1101101;

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      4'h6: out1=7'b0000010;  //1111101;

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      4'h7: out1=7'b1111000;  //0000111;

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      4'h8: out1=7'b0000000;  //1111111;

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      4'h9: out1=7'b0011000;  //1100111;

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       default: out1=7'b1111111;//0000000;

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    endcase

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  end  

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endmodule

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endmodule

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// display numbers*/

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/*

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module Slowclock(input wire clk, output reg clkslowed

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    );

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  integer count=0; 

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  always @(posedge clk)

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    begin 

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      if(count<12500)

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      begin 

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        count=count+1;

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      end 

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      else 

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      begin 

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            clkslowed=!clkslowed;

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            count=0;

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          end

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      end

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endmodule

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//slow down clock speed so you can manipulate the seven seg display */

I just dont know why my lights arent going on I have the nexys 2 board I 
need the countdown to work or seven seg display I need for it to 
countdown from 9 to 0

  





  

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      Joseph

    

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Lothar M. wrote:
> Joseph J. wrote:
> I just want to turn the seven seg display on as a countdown
>
> What did happen instead?
> And how did you find out

 Nothing happened it didn't turn on at all the seven segment. I found 
because it didn't work I don't know where I put the actual lights part 
referenced as A0 in the next part.

  





  

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      Lothar M.
      

    

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      (Company: Titel)

    

    
    #4378366
  




  

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Joseph Abel wrote:
> I feel like im messing my user constraints file I am not sure
What does your simulation look like?
In a behavioral simulation no UCF file is involved. And therefore its 
the best way to start that way.

> I am not sure
What about trying to switch on just some segments on one of the 
digits. That would be a wholy static design without counters and other 
more tricky things.
So: do some small steps and learn by those small steps...

  





  

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