DE2-115 16x4 Priority Encoder

DE2-115 16x4 Priority Encoder

//需 Import  pin assignments  DE2_115_pin_assignments

module Encoder_if(
  //input  CLOCK_50, // 50 MHz clock
  //input  [3:0] KEY,      // Pushbutton[3:0]
  input  [17:0] SW, // Toggle Switch[17:0]
  //output [6:0] HEX0,HEX1,HEX2,HEX3,HEX4,HEX5,HEX6,HEX7,  // Seven Segment Digits
  output [8:0] LEDG,  // LED Green
  output [17:0] LEDR   // LED Red
  // inout  [35:0] GPIO_0,GPIO_1, // GPIO Connections
  // LCD Module 16X2
  /*
  output LCD_ON, // LCD Power ON/OFF
  output LCD_BLON, // LCD Back Light ON/OFF
  output LCD_RW, // LCD Read/Write Select, 0 = Write, 1 = Read
  output LCD_EN, // LCD Enable
  output LCD_RS, // LCD Command/Data Select, 0 = Command, 1 = Data
  inout [7:0] LCD_DATA, // LCD Data bus 8 bits
  input [2:0] mess, // MESSAGE STATUS (see lcd_test)
  input [1:0] isServer // SERVER STATUS (see lcd_test)
  */
);

// All inout port turn to tri-state
//assign GPIO_0  = 36'hzzzzzzzzz;
//assign GPIO_1  = 36'hzzzzzzzzz;

// turn LCD ON
//assign LCD_ON  = 1'b1;
//assign LCD_BLON = 1'b1;

// blank unused 7-segment digits
// blank unused 7-segment digits
//assign HEX0 = 7'b111_1111;
//assign HEX1 = 7'b111_1111;
//assign HEX2 = 7'b111_1111;
//assign HEX3 = 7'b111_1111;
//assign HEX4 = 7'b111_1111;
//assign HEX5 = 7'b111_1111;
//assign HEX6 = 7'b111_1111;
//assign HEX7 = 7'b111_1111;

assign LEDR=SW;
M_encoder( LEDG[3:0],SW[15:0],SW[17] );

endmodule

//-----------------------------------------------------
// Design Name : encoder_using_if
// File Name   : encoder_using_if.v
// Function    : Encoder using If
// Coder       : Deepak Kumar Tala
//-----------------------------------------------------
module M_encoder(
 binary_out , //  4 bit binary output
 encoder_in , //  16-bit input
 enable       //  Enable for the encoder
);
 //-----------Output Ports---------------
 output [3:0] binary_out  ;
 //-----------Input Ports---------------
 input  enable ;
 input [15:0] encoder_in ;
 //------------Internal Variables--------
 reg [3:0] binary_out ;
 //-------------Code Start-----------------
 always @ (enable or encoder_in)
  begin
    binary_out = 0;
    if (enable) begin
      if (encoder_in[1]==1'b1) begin
       binary_out = 1;
      end  if (encoder_in[2] == 1'b1) begin
       binary_out = 2;
      end  if (encoder_in[3] == 1'b1) begin
       binary_out = 3;
      end  if (encoder_in[4] == 1'b1) begin
       binary_out = 4;
      end  if (encoder_in[5] == 1'b1) begin
       binary_out = 5;
      end  if (encoder_in[6] == 1'b1) begin
       binary_out = 6;
      end  if (encoder_in[7] == 1'b1) begin
       binary_out = 7;
      end  if (encoder_in[8] == 1'b1) begin
       binary_out = 8;
      end  if (encoder_in[9] == 1'b1) begin
       binary_out = 9;
      end if (encoder_in[10] == 1'b1) begin
       binary_out = 10;
      end  if (encoder_in[11] == 1'b1) begin
       binary_out = 11;
      end  if (encoder_in[12] == 1'b1) begin
       binary_out = 12;
      end  if (encoder_in[13] == 1'b1) begin
       binary_out = 13;
      end  if (encoder_in[14] == 1'b1) begin
       binary_out = 14;
      end if (encoder_in[15] == 1'b1) begin
       binary_out = 15;
      end
   end
 end
     
endmodule

https://www.youtube.com/watch?v=P5yuUIx2W-c