Subversion Repositories usb2uart

task reg_write;

input [15:0] addr;

input [31:0] data;

reg [7:0] read_data;

reg flag;

begin

   fork

   begin : loop_1

       tb_top.tb_uart.write_char("w");

       tb_top.tb_uart.write_char("m");

       tb_top.tb_uart.write_char(" ");

       tb_top.tb_uart.write_char(hex2char(addr[15:12]));

       tb_top.tb_uart.write_char(hex2char(addr[11:8]));

       tb_top.tb_uart.write_char(hex2char(addr[7:4]));

       tb_top.tb_uart.write_char(hex2char(addr[3:0]));

       tb_top.tb_uart.write_char(" ");

       tb_top.tb_uart.write_char(hex2char(data[31:28]));

       tb_top.tb_uart.write_char(hex2char(data[27:24]));

       tb_top.tb_uart.write_char(hex2char(data[23:20]));

       tb_top.tb_uart.write_char(hex2char(data[19:16]));

       tb_top.tb_uart.write_char(hex2char(data[15:12]));

       tb_top.tb_uart.write_char(hex2char(data[11:8]));

       tb_top.tb_uart.write_char(hex2char(data[7:4]));

       tb_top.tb_uart.write_char(hex2char(data[3:0]));

       tb_top.tb_uart.write_char("\n");

   end

   begin : loop_2

       // Wait for sucess command

       flag = 0;

       while(flag == 0)

       begin

          tb_top.tb_uart.read_char(read_data,flag);

            //$write ("%c",read_data);

       end

   end

   join

end

endtask

task reg_read;

input [15:0] addr;

output [31:0] data;

reg [7:0] read_data;

reg flag;

integer i;

begin

   fork

   begin : loop_1

      tb_top.tb_uart.write_char("r");

      tb_top.tb_uart.write_char("m");

      tb_top.tb_uart.write_char(" ");

      tb_top.tb_uart.write_char(hex2char(addr[15:12]));

      tb_top.tb_uart.write_char(hex2char(addr[11:8]));

      tb_top.tb_uart.write_char(hex2char(addr[7:4]));

      tb_top.tb_uart.write_char(hex2char(addr[3:0]));

      tb_top.tb_uart.write_char(" ");

      tb_top.tb_uart.write_char("\n");

   end

   begin : loop_2

      // Wait for sucess command

      flag = 0;

      i = 0;

      while(flag == 0)

      begin

         tb_top.tb_uart.read_char(read_data,flag);

         //$write ("%d:%c",i,read_data);

           case (i)

           8'd10 : data[31:28] = char2hex(read_data);

           8'd11 : data[27:24] = char2hex(read_data);

           8'd12 : data[23:20] = char2hex(read_data);

           8'd13 : data[19:16] = char2hex(read_data);

           8'd14 : data[15:12] = char2hex(read_data);

           8'd15 : data[11:8]  = char2hex(read_data);

           8'd16 : data[7:4]   = char2hex(read_data);

           8'd17 : data[3:0]   = char2hex(read_data);

           endcase

           i = i+1;

      end

   end

   join

   //$display("Receoved Data: %x",data);

end

endtask

// Character to hex number

function [3:0] char2hex;

input [7:0] data_in;

case (data_in)

     8'h30:     char2hex = 4'h0; // character '0' 

     8'h31:     char2hex = 4'h1; // character '1'

     8'h32:     char2hex = 4'h2; // character '2'

     8'h33:     char2hex = 4'h3; // character '3'

     8'h34:     char2hex = 4'h4; // character '4' 

     8'h35:     char2hex = 4'h5; // character '5'

     8'h36:     char2hex = 4'h6; // character '6'

     8'h37:     char2hex = 4'h7; // character '7'

     8'h38:     char2hex = 4'h8; // character '8'

     8'h39:     char2hex = 4'h9; // character '9'

     8'h41:     char2hex = 4'hA; // character 'A'

     8'h42:     char2hex = 4'hB; // character 'B'

     8'h43:     char2hex = 4'hC; // character 'C'

     8'h44:     char2hex = 4'hD; // character 'D'

     8'h45:     char2hex = 4'hE; // character 'E'

     8'h46:     char2hex = 4'hF; // character 'F'

     8'h61:     char2hex = 4'hA; // character 'a'

     8'h62:     char2hex = 4'hB; // character 'b'

     8'h63:     char2hex = 4'hC; // character 'c'

     8'h64:     char2hex = 4'hD; // character 'd'

     8'h65:     char2hex = 4'hE; // character 'e'

     8'h66:     char2hex = 4'hF; // character 'f'

      default :  char2hex = 4'hF;

   endcase

endfunction

// Hex to Asci Character 

function [7:0] hex2char;

input [3:0] data_in;

case (data_in)

     4'h0:      hex2char = 8'h30; // character '0' 

     4'h1:      hex2char = 8'h31; // character '1'

     4'h2:      hex2char = 8'h32; // character '2'

     4'h3:      hex2char = 8'h33; // character '3'

     4'h4:      hex2char = 8'h34; // character '4' 

     4'h5:      hex2char = 8'h35; // character '5'

     4'h6:      hex2char = 8'h36; // character '6'

     4'h7:      hex2char = 8'h37; // character '7'

     4'h8:      hex2char = 8'h38; // character '8'

     4'h9:      hex2char = 8'h39; // character '9'

     4'hA:      hex2char = 8'h41; // character 'A'

     4'hB:      hex2char = 8'h42; // character 'B'

     4'hC:      hex2char = 8'h43; // character 'C'

     4'hD:      hex2char = 8'h44; // character 'D'

     4'hE:      hex2char = 8'h45; // character 'E'

     4'hF:      hex2char = 8'h46; // character 'F'

   endcase

endfunction