Subversion Repositories uart2bus_testbench

//-------------------------------------------------------------------------------------------------

//

//                                     UART2BUS VERIFICATION

//

//-------------------------------------------------------------------------------------------------

// CREATOR    : HANY SALAH

// PROJECT    : UART2BUS UVM TEST BENCH

// UNIT       : DRIVER

//-------------------------------------------------------------------------------------------------

// TITLE      : UART DRIVER

// DESCRIPTION: THIS DRIVER IS RESPONSIBLE FOR SETTING BFMS CONFIGURATIONS. ALSO DRIVING STIMULUS

//              TO THE BFMS AND SENDING TRANSACTIONS TO SCOREBOARD.

//-------------------------------------------------------------------------------------------------

// LOG DETAILS

//-------------

// VERSION      NAME        DATE        DESCRIPTION

//    1       HANY SALAH    02012016    FILE CREATION

//    2       HANY SALAH    07012016    ADD INITIALIZE BFM METHOD

//    3       HANY SALAH    17022016    IMPROVE BLOCK DESCRIPTION AND ADD COMMENTS

//-------------------------------------------------------------------------------------------------

// ALL COPYRIGHTS ARE RESERVED FOR THE PRODUCER ONLY .THIS FILE IS PRODUCED FOR OPENCORES MEMBERS

// ONLY AND IT IS PROHIBTED TO USE THIS MATERIAL WITHOUT THE CREATOR'S PERMISSION

//-------------------------------------------------------------------------------------------------

class uart_driver extends uvm_driver #(uart_transaction);

  // Two Transaction Instances that are used to bring and clone the stimulus

  uart_transaction      trans,_trans;

  // Instance from Global UART Configuration

  uart_config           _config;

  // UART Interafce instance

  virtual uart_interface  uart_inf;

  // RF Interface instance

  virtual rf_interface rf_inf;

  // Arbiter Interface Instance

  virtual uart_arbiter  arb_inf;

  // Analysis Port to both scoreboard and driver

  uvm_analysis_port #(uart_transaction)   drv_scbd_cov;

  `uvm_component_utils(uart_driver)

  function new (string name , uvm_component parent);

    super.new(name,parent);

  endfunction: new

  // UVM Build Phase Declaration that includes locating instances and get interfaces handler from

  // the configuration database

  extern function void build_phase (uvm_phase phase);

  // Both BFMs configurations setting and BFMs assignment are carried out through this UVM phase.

  extern function void end_of_elaboration_phase (uvm_phase phase);

  extern task run_phase (uvm_phase phase);

  // Actual drive data routine

  extern task drive_data ();

  // initialize bfms

  extern function void initialize_bfms (act_edge  _edge,

                                        start_bit _bit,

                                        int enable,

                                        int num_stop_bits,

                                        int num_of_bits,

                                        data_mode _datamode,

                                        parity_mode _paritymode,

                                        time _resp);

endclass:uart_driver

function void uart_driver::build_phase (uvm_phase phase);

  super.build_phase(phase);

  trans   = uart_transaction::type_id::create("trans");

  _trans  = uart_transaction::type_id::create("_trans");

  _config = uart_config::type_id::create("_config");

  drv_scbd_cov = new("drv_scbd_cov",this);

endfunction:build_phase

function void uart_driver::end_of_elaboration_phase (uvm_phase phase);

  if(!uvm_config_db#(uart_config)::get(this, "", "UART_CONFIGURATION", _config))

    `uvm_fatal("NOCONFIGURATION",{"configuration instance must be set for: ",get_full_name(),"._config"});

  if(!uvm_config_db#(virtual uart_interface)::get(this, "", "uart_inf", _config.uart_inf))

      `uvm_fatal("NOVIF",{"virtual interface must be set for: ",get_full_name(),".uart_inf"});

    uart_inf=_config.uart_inf;

  if(!uvm_config_db#(virtual rf_interface)::get(this, "", "rf_inf", _config.rf_inf))

      `uvm_fatal("NOVIF",{"virtual interface must be set for: ",get_full_name(),".rf_inf"});

    rf_inf=_config.rf_inf;

  if(!uvm_config_db#(virtual uart_arbiter)::get(this,"","arb_inf",_config.arb_inf))

      `uvm_fatal("NOVIF",{"virtual interface must be set for:",get_full_name(),".arb_inf"})

    arb_inf=_config.arb_inf;

  initialize_bfms(_config._edge,

              _config._start,

              _config.use_false_data,

              _config.num_stop_bits,

              _config.num_of_bits,

              _config._datamode,

              _config._paritymode,

              _config.response_time);

endfunction:end_of_elaboration_phase

function void uart_driver::initialize_bfms (act_edge  _edge,

                                            start_bit _bit,

                                            int  enable,

                                            int num_stop_bits,

                                            int num_of_bits,

                                            data_mode _datamode,

                                            parity_mode _paritymode,

                                            time      _resp);

  uart_inf.set_configuration (_edge,_bit,num_stop_bits,num_of_bits,_datamode,_paritymode,_resp,enable);

endfunction:initialize_bfms

task uart_driver::run_phase (uvm_phase phase);

  forever

    begin

    seq_item_port.get_next_item(_trans);

    $cast(trans,_trans.clone());

    drv_scbd_cov.write(trans);

    drive_data();

    seq_item_port.item_done();

    end

endtask:run_phase

task uart_driver::drive_data();

  uart_inf.wait_idle_time(trans.time_before*trans.scale);

  uart_inf.set_event();

  if (trans._mode == text || trans._mode == wrong_mode_text)

    begin

    case(trans._command)

      read:

        begin

        rf_inf.fill_byte (trans.address,

                          trans._data[0]);

        uart_inf.read_text_mode(trans._mode,

                                trans.wrong_prefix,

                                trans._chartype,

                                trans._spacetype1,

                                trans.space_wrong1,

                                trans._eoltype,

                                trans.eol_wrong,

                                trans.address,

                                trans.false_data[0],

                                trans.false_data_en);

        end

      write:

        begin

        uart_inf.write_text_mode(trans._mode,

                                 trans.wrong_prefix,

                                 trans._chartype,

                                 trans._spacetype1,

                                 trans.space_wrong1,

                                 trans._spacetype2,

                                 trans.space_wrong2,

                                 trans._eoltype,

                                 trans.eol_wrong,

                                 trans.address,

                                 trans._data[0]);

        end

      nop:

        begin

        `uvm_fatal("TB ISSUE","NOP command value shouldn't be valued in text mode")

        end

      default:

        begin

        `uvm_fatal("TB ISSUE", "wrong_mode")

        end

    endcase

    end

  else if (trans._mode==binary || trans._mode==wrong_mode_bin)

    begin

    if (trans._command == read || trans._command == invalid_read)

      begin

      rf_inf.fill_block(trans.address,

                        trans._data,

                        trans.length_data);

      uart_inf.read_binary_mode(trans._mode,

                                trans.wrong_prefix,

                                trans._command,

                                trans._reqack,

                                trans._reqinc,

                                trans.length_data,

                                trans.address,

                                trans._data,

                                trans.false_data,

                                trans.false_data_en);

      end

    else if (trans._command == write || trans._command == invalid_write)

      begin

      uart_inf.write_binary_mode(trans._mode,

                                 trans.wrong_prefix,

                                 trans._command,

                                 trans._reqack,

                                 trans._reqinc,

                                 trans.length_data,

                                 trans.address,

                                 trans._data);

      end

    else

      begin

      uart_inf.nop_command(trans._mode,

                           trans.wrong_prefix,

                           trans._reqack,

                           trans._reqinc);

      end

    end

  uart_inf.wait_idle_time(trans.time_after*trans.scale);

endtask:drive_data