Subversion Repositories sdcard_mass_storage_controller

// module name

`define MODULE_NAME sd_rx_fifo

module sd_rx_fifo_tb ( );

   reg [4-1:0] d;

   reg wr;

   reg wclk;

   wire [32-1:0] q;

   reg rd;

   wire fe;

   reg rclk;

   reg rst;

   wire  empty;

   reg [31:0] slask;

   wire [1:0] mem_empt;

  sd_rx_fifo sd_rx_fifo_1(

   .d (d),

   .wr (wr),

   .wclk (wclk),

   .q (q),

   .rd (rd),

   .full (fe),

   .empty (empty),

   .mem_empt (mem_empt),

   .rclk (rclk),

   .rst (rst)

   );

event reset_trigger;

event  reset_done_trigger;

event start_trigger;

event start_done_trigger;

reg [3:0] send [16:0];

reg [3:0] send_c;

reg start;

reg sw;

initial

   begin

     wclk=0;

     rst=0;

     rclk=0;

     d =0;

     rst=0;

     wr=0;

     #5 ->reset_trigger;

     send [0] = 4'ha;

     send [1] = 4'hb;

     send [2] = 4'hc;

     send [3] = 4'hd;

     send [4] = 4'he;

     send [5] = 4'hf;

     send [6] = 4'hd;

     send [7] = 4'hc;

     send [8] = 4'hf;

     send [9] = 4'he;

     send [10] = 4'hd;

     send [11] = 4'hc;

     send [12] = 4'hb;

     send [13] = 4'ha;

     send [14] = 4'ha;

     send [15] = 4'hb;

     send_c =0;

     sw=0;

     start=0;

end

always begin

  #5 rclk = !rclk;

 end

always begin

  #10 wclk = !wclk;

 end

 initial begin

    forever begin

      @ (reset_trigger);

      @ (posedge wclk);

      rst =1 ;

      @ (posedge wclk);

      rst = 0;

      #20

      start=1;

      -> reset_done_trigger;

    end

  end

always @ (posedge rclk)

if (!empty) begin

     rd=1;

    slask =q;

end

else

  rd=0;

always @ (posedge wclk)

begin

if(start)

   sw=~sw;

   if (sw) begin

   d=send[send_c];

   wr=1;

   send_c=send_c+1;  end

   else begin

     wr=0;

   end

 //  if (!rd) begin

  //    @ (posedge rclk);

//       slask =q; 

//   rd=1;

//  @ (posedge rclk);

//   rd=0;

//  end

end

endmodule