七段顯示器的霹靂燈 適用於DE2-70

七段顯示器的霹靂燈 適用於DE2-70
a->b->c->d->e->f->e->d->c->b->a->b....................



// Ch08 pili_1.v
// 七段顯示霹靂燈

module pili_ex1(SW, LEDR, LEDG , CLOCK_50 , 
               CLOCK_27 ,KEY ,HEX0 ,HEX1 ,
               HEX2,HEX3 ,HEX4,HEX5 ,HEX6,HEX7 );

input  [17:0] SW; // toggle switches
input  [3:0] KEY;     // Push bottom
input  CLOCK_27; //Clock 27MHz 
input  CLOCK_50; //Clock 50Mhz


output [17:0] LEDR; // red  LEDS   
output [7:0]  LEDG; // green LEDs
    
    output [6:0] HEX0,HEX1,HEX2,HEX3,HEX4,HEX5,HEX6 ,HEX7; //7-segment display

//set original program input , output 

wire   sys_clk;
wire   rst_n;
    reg [3:0] L;
    wire HZ_1;  //1HZ Clock
    reg    [7:0] seg;
    
    
    
//assign to DE2-70 hardware     
  
    assign sys_clk = CLOCK_50;
    assign rst_n = KEY[0];
    
    // reg A,B,C,D,E,F;
      
  //module _1HZ (CLK, RSTn, LED_Out);

_1HZ UUT01
     (.CLK(sys_clk),
    .RSTn(rst_n),
    .LED_Out(HZ_1));
    


  always @(posedge HZ_1 or negedge rst_n ) 
begin
        begin
if(!rst_n) 
L[3:0]=0;

    else if (L>=4'b1100)
L[3:0]=4'b1;

else 
L=L+1'b1;
   
   end
   
    
   case (L)

// Dot point is always disable
4'b0001 : seg = 8'b1111_1110;   //1 = a
4'b0010 : seg = 8'b1111_1101;   //2 = b
4'b0011 : seg = 8'b1111_1011;   //3 = c
4'b0100 : seg = 8'b1111_0111;   //4 = d
4'b0101 : seg = 8'b1110_1111;   //5 = e
4'b0110 : seg = 8'b1101_1111;   //6 = f
4'b0111 : seg = 8'b1111_1110;   //7 = a
4'b1000 : seg = 8'b1101_1111;   //8 = f
4'b1001 : seg = 8'b1110_1111;   //9 = e
4'b1010 : seg = 8'b1111_0111;   //A = d
4'b1011 : seg = 8'b1111_1011;   //B = c
4'b1100 : seg = 8'b1111_1101;   //C = b

default : seg = 8'b11111111;   //OFF

endcase
    end
   
// assign {A,B,C,D,E,F} = L[6:1];

assign HEX0=seg[6:0];
assign HEX1=seg[6:0];
assign HEX2=seg[6:0];
assign HEX3=seg[6:0];
assign HEX4=seg[6:0];
assign HEX5=seg[6:0];
assign HEX6=seg[6:0];
assign HEX7=seg[6:0];

assign LEDG[5:0]=seg[5:0];


endmodule




/*
module pili_1 
(Clk,Clr,A,B,C,D,E,F);
input  Clk,Clr; // 一位元輸入
output A,B,C,D,E,F; // 一位元輸出
reg    [6:0] L; // 宣告為暫存器資料

// 上緣觸發時脈, 上緣同步清除
always@ (posedge Clk) 
  if (Clr) L = 7'b1000000;  // A, 順時針
  else if (L == 7'b1000000) L = 7'b0100000;  // B, 順時針
  else if (L == 7'b0100000) L = 7'b0010000;  // C, 順時針
  else if (L == 7'b0010000) L = 7'b0001000;  // D, 順時針
  else if (L == 7'b0001000) L = 7'b0000100;  // E, 順時針
  else if (L == 7'b0000100) L = 7'b0000010;  // F, 順時針
  else if (L == 7'b0000010) L = 7'b1000001;  // A, 逆時針
  else if (L == 7'b1000001) L = 7'b0000011;  // F, 逆時針
  else if (L == 7'b0000011) L = 7'b0000101;  // E, 逆時針
  else if (L == 7'b0000101) L = 7'b0001001;  // D, 逆時針
  else if (L == 7'b0001001) L = 7'b0010001;  // C, 逆時針
  else if (L == 7'b0010001) L = 7'b0100001;  // B, 逆時針
  else if (L == 7'b0100001) L = 7'b1000000;  // A, 順時針
  else                 L = 7'b0000000;  // 不顯示
assign {A,B,C,D,E,F} = L[6:1];

endmodule
*/





//====================================
//Clock input 50MHZ
//====================================
 module _1HZ (CLK, RSTn, LED_Out);

    input CLK;
    input RSTn;
    output LED_Out;
    
    /*************************************/
    
    parameter T1S = 24'd50_000_000;  //50MHZ 
    
    /*************************************/
    
    reg [23:0]Count1;
    
    always @ ( posedge CLK or negedge RSTn )
    begin
     if( !RSTn ) 
         Count1 <= 24'd0;
     else if( Count1 == T1S )
         Count1 <= 24'd0;
     else
         Count1 <= Count1 + 1'b1;
end        
 /*************************************/

reg rLED_Out;


 always @ ( posedge CLK or negedge RSTn )
    begin
        if( !RSTn ) 
            rLED_Out <= 1'b0;
        else if( Count1 >= 24'd0 && Count1 < 24'd25_000_000 )
          //0.5sec ON , o.5sec OFF
            rLED_Out <= 1'b1;
        else 
            rLED_Out <= 1'b0;
     end  
          
     /***************************************/
     
     assign LED_Out = rLED_Out;
     
     /***************************************/
              
    
endmodule