uvm_config_db

[uvm_rookie]

UVM1.0 has an ubus example. One of the test has the following code.

Instead of using set_config_string, we need to use uvm_config_db ..

We do this in the build phase of this test class. How come we need to use "sequencer.run_phase", instead of "sequencer.build_phase" ?

// Read Modify Write Read Test

class test_read_modify_write extends ubus_example_base_test;

`uvm_component_utils(test_read_modify_write)

function new(string name = "test_read_modify_write", uvm_component parent=null);

super.new(name,parent);

endfunction : new

virtual function void build_phase(uvm_phase phase);

begin

uvm_config_db#(uvm_object_wrapper)::set(this,

"ubus_example_tb0.ubus0.masters[0].sequencer.run_phase",

"default_sequence",

read_modify_write_seq::type_id::get());

uvm_config_db#(uvm_object_wrapper)::set(this,

"ubus_example_tb0.ubus0.slaves[0].sequencer.run_phase",

"default_sequence",

slave_memory_seq::type_id::get());

// Create the tb

super.build_phase(phase);

end

endfunction : build_phase

endclass : test_read_modify_write

[uwes]

hi,

the ::set operation sets the default sequence (the one which is automatically started) for a particular phase. so basically you "configure" during build_phase() that a particular sequence should automatically run in the "run_phase()". btw the build_phase() is not a run_time phase and would therefore not execute any sequences.