Subversion Repositories rs_encoder_decoder

// THIS IS A SYNDROME BUFFER THAT PUTS DATA IN FIFO 

// AND DATA CAN BE PICKED FROM THE LAST OF THE FIFO 

// OR FROM LOCATION SPECIFIED BY loc_i 

module GF8SyndromBuffer(clk_i, rst_i,

  push_i,          // push data

  sel_i,           // Enable Signal

  loc_i,           // Enable Signal

  syndrom_i,       // input syndrom

  syndrom_o       // data from loc

  );

  // Inputs are declared here

  input clk_i,rst_i,push_i;                     // Clock and Reset Declaration

  input sel_i;

  input [4:0] loc_i;

  input [7:0] syndrom_i;

  output wire [7:0] syndrom_o;

 // This is first 2*t syndrome buffer 

  reg [7:0] shift_reg[0:16];

  assign syndrom_o = sel_i?shift_reg[loc_i]:shift_reg[16];

  // Sequential Body

  always @(posedge clk_i or posedge rst_i) begin

    if (rst_i) begin

      shift_reg[0] <= 0;

      shift_reg[1] <= 0;

      shift_reg[2] <= 0;

      shift_reg[3] <= 0;

      shift_reg[4] <= 0;

      shift_reg[5] <= 0;

      shift_reg[6] <= 0;

      shift_reg[7] <= 0;

      shift_reg[8] <= 0;

      shift_reg[9] <= 0;

      shift_reg[10] <= 0;

      shift_reg[11] <= 0;

      shift_reg[12] <= 0;

      shift_reg[13] <= 0;

      shift_reg[14] <= 0;

      shift_reg[15] <= 0;

      shift_reg[16] <= 0;

    end

    else if(push_i) begin

      shift_reg[0] <= syndrom_i;

      shift_reg[1] <= shift_reg[0];

      shift_reg[2] <= shift_reg[1];

      shift_reg[3] <= shift_reg[2];

      shift_reg[4] <= shift_reg[3];

      shift_reg[5] <= shift_reg[4];

      shift_reg[6] <= shift_reg[5];

      shift_reg[7] <= shift_reg[6];

      shift_reg[8] <= shift_reg[7];

      shift_reg[9] <= shift_reg[8];

      shift_reg[10] <= shift_reg[9];

      shift_reg[11] <= shift_reg[10];

      shift_reg[12] <= shift_reg[11];

      shift_reg[13] <= shift_reg[12];

      shift_reg[14] <= shift_reg[13];

      shift_reg[15] <= shift_reg[14];

      shift_reg[16] <= shift_reg[15];

    end

  end

endmodule