Subversion Repositories oms8051mini

      // Byte-0

      @(posedge app_clk);

       reg_cs  = 0;

      // Byte-1

      reg_cs = 1;

      reg_wr = 0;

      reg_be = 1'h1;

      reg_addr = address+1;

      @(posedge reg_ack);

       #1 read_data[15:8]= reg_rdata[7:0];

      @(posedge app_clk);

       reg_cs  = 0;

      // Byte-2

      reg_cs = 1;

      reg_wr = 0;

      reg_be = 1'h1;

      reg_addr = address+2;

      @(posedge reg_ack);

       #1 read_data[23:16]= reg_rdata[7:0];

      @(posedge app_clk);

       reg_cs  = 0;

      // Byte-3

      reg_cs = 1;

      reg_wr = 0;

      reg_be = 1'h1;

      reg_addr = address+3;

      @(posedge reg_ack);

       #1 read_data[31:24] = reg_rdata[7:0];

      // Byte-0

      @(posedge app_clk);

      reg_id  = block_id;

      reg_cs = 1;

      reg_wr = 1;

      reg_be = 1'h1;

      reg_addr = address;

      reg_wdata = write_data[7:0];

      @(posedge reg_ack);

      @(posedge app_clk);

      reg_cs  = 0;

      reg_wr = 0;

      // Byte-1

      @(posedge app_clk);

      reg_id  = block_id;

      reg_cs = 1;

      reg_wr = 1;

      reg_be = 1'h1;

      reg_addr = address+1;

      reg_wdata = write_data[15:8];

      @(posedge reg_ack);

      @(posedge app_clk);

      reg_cs  = 0;

      reg_wr = 0;

      // Byte-2

      @(posedge app_clk);

      reg_id  = block_id;

      reg_cs = 1;

      reg_wr = 1;

      reg_be = 1'h1;

      reg_addr = address+2;

      reg_wdata = write_data[23:16];

      @(posedge reg_ack);

      @(posedge app_clk);

      reg_cs  = 0;

      reg_wr = 0;

      // Byte-2

      @(posedge app_clk);

      reg_id  = block_id;

      reg_cs = 1;

      reg_wr = 1;

      reg_be = 1'h1;

      reg_addr = address+3;

      reg_wdata = write_data[31:24];

      @(posedge reg_ack);

      @(posedge app_clk);

      reg_cs  = 0;

      reg_wr = 0;

  end

endtask

task cpu_byte_read;

  input  [3:0]  block_id;

  input  [15:0] address;

  output [7:0] read_data;

  begin

      @(posedge app_clk);

      reg_id  = block_id;

      // Byte-0

      reg_cs = 1;

      reg_wr = 0;

      reg_be = 1'h1;

      reg_addr = address;

      @(posedge reg_ack);

       #1 read_data[7:0] = reg_rdata[7:0];

      @(posedge app_clk);

       reg_cs  = 0;

      //$display ("Config-Read: Id: %h Addr = %h, Data = %h", block_id,address, read_data);

  end

endtask

task cpu_byte_write;

  input  [3:0] block_id; // 0/1/2 --> ram/spi/uart 

  input  [15:0] address;

  input  [7:0] write_data;

  begin

      $display ("Config-Write: Id: %h Addr = %h, Cfg. Data = %h", block_id,address, write_data);

      // Byte-0