Hello everyone,
I have been trying out factory override and have hit a dead-end I can not escape.
I have two sequence items as below,
class seq_item extends uvm_sequence_item;
rand logic rst_n;
rand logic [7:0] count;
`uvm_object_utils_begin(seq_item)
`uvm_field_int(rst_n,UVM_ALL_ON)
`uvm_field_int(count,UVM_ALL_ON)
`uvm_object_utils_end
function new(string name = "seq_item");
super.new(name);
endfunction: new
endclass
class seq_item_2 extends seq_item;
rand logic enb;
`uvm_object_utils_begin(seq_item_2)
`uvm_field_int(enb,UVM_ALL_ON)
`uvm_object_utils_end
function new(string name = "seq_item_2");
super.new(name);
endfunction: new
endclassAnd two drivers as below,
class c_driver #(type T = seq_item) extends uvm_driver #(T);
`uvm_component_utils(c_driver #(T))
T item;
virtual c_interface vif;
function new(string name = "c_driver", uvm_component parent = null);
super.new(name, parent);
`uvm_info(get_full_name(),"DRIVER INITIATED\n", UVM_MEDIUM)
endfunction
virtual function void build_phase(uvm_phase phase);
super.build_phase(phase);
`uvm_info(get_full_name(), "DRIVER BUILD PHASE\n", UVM_MEDIUM)
if (!(uvm_config_db #(virtual c_interface)::get(this, "", "c_interface", vif)) ) begin
`uvm_fatal(get_full_name(),"SIMULATION STOPPED || DRIVER COULD NOT FIND INTERFACE\n")
end
endfunction
task run_phase(uvm_phase phase);
`uvm_info(get_full_name(),"DRIVER RUN PHASE \n", UVM_MEDIUM)
forever begin
seq_item_port.get_next_item(item);
vif.rst_n <= item.rst_n;
@(negedge vif.clk)
seq_item_port.item_done();
end
endtask
endclass
class c_driver_2 #(type T = seq_item_2) extends c_driver #(T);
`uvm_component_utils(c_driver_2 #(T))
function new(string name = "c_driver_2", uvm_component parent = null);
super.new(name, parent);
`uvm_info(get_full_name(),"DRIVER_v2 INITIATED\n", UVM_MEDIUM)
endfunction
task run_phase(uvm_phase phase);
`uvm_info(get_full_name(),"DRIVER_v2 RUN PHASE \n", UVM_MEDIUM)
forever begin
seq_item_port.get_next_item(item);
vif.rst_n <= item.rst_n;
vif.enb <= item.enb;
@(negedge vif.clk)
seq_item_port.item_done();
end
endtask
endclassThe agent build phase is,
virtual function void build_phase(uvm_phase phase);
super.build_phase(phase);
`uvm_info(get_full_name(), "AGENT BUILD PHASE \n", UVM_MEDIUM)
sqncr = c_sqncr::type_id::create("sqncr", this); // created sqncr
drvr = c_driver::type_id::create("drvr", this); // created driver
endfunctionAnd the Test build phase,
virtual function void build_phase(uvm_phase phase);
super.build_phase(phase);
`uvm_info(get_full_name(),"TEST BUILD PHASE \n", UVM_MEDIUM)
set_type_override_by_type (seq_item::get_type(), seq_item_2::get_type());
set_type_override_by_type (c_driver::get_type(), c_driver_2::get_type());
env = environment::type_id::create("env",this);
endfunctionI am hitting an UVM_FATAL as,
Quote:
UVM_FATAL @ 0: reporter [FCTTYP] Factory did not return a component of type 'c_driver #(T)'. A component of type 'c_driver_2 #(T)' was returned instead. Name=drvr Parent=c_agent contxt=uvm_test_top.env.agent
How can I resolve this issue??
