Subversion Repositories oms8051mini

initial

begin

   reg_cs  = 0;

   reg_be  = 4'h0;

end

task cpu_read;

  input  [2:0] block_id;

  input  [15:0] address;

  output [31:0] read_data;

  begin

      @(posedge app_clk);

      if(block_id == 1) reg_id  = `ADDR_SPACE_MAC;

      if(block_id == 2) reg_id  = `ADDR_SPACE_SPI;

      if(block_id == 3) reg_id  = `ADDR_SPACE_UART;

      if(block_id == 4) reg_id  = `ADDR_SPACE_RAM;

      reg_cs = 1;

      reg_wr = 0;

      reg_be = 4'hF;

      reg_addr = address;

      @(posedge reg_ack);

       #1 read_data = reg_rdata;

      @(posedge app_clk);

          reg_cs  = 0;

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

  end

endtask

task cpu_write;

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

  input  [15:0] address;

  input  [31:0] write_data;

  begin

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

      @(posedge app_clk);

      if(block_id == 1) reg_id  = `ADDR_SPACE_MAC;

      if(block_id == 2) reg_id  = `ADDR_SPACE_SPI;

      if(block_id == 3) reg_id  = `ADDR_SPACE_UART;

      reg_cs = 1;

      reg_wr = 1;

      reg_be = 4'hF;

      reg_addr = address;

      reg_wdata = write_data;

      @(posedge reg_ack);

      @(posedge app_clk);

      reg_cs  = 0;

      reg_wr = 0;

  end

endtask