Error loading the desing (Matlab - TB integration)

UVM
12

In reply to antonio92m:

Regarding to the UVM-Matlab integration, it works. The predictor is working eventually succesfully!!!

However there is a number of transactions where my testbench dies. I get the following error:

** Fatal: qmw_hdl2matlab fatal: Invalid variable name X

Time: 755390 ns Scope: qmw_hdl2matlab.getIntMultiDim File: qmw/qmw_sv/questa/qmw_hdl2matlab.sv Line: 136

Break at qmw/qmw_sv/questa/qmw_hdl2matlab.sv line 136

The way I communicate with Matlab I would say it is pretty similar to the example provided.


class predictor_matlab extends predictor; //input data
   // Declaration macros
   `uvm_component_utils(predictor_matlab);

   extern function new(string name, uvm_component parent);
   extern function void build_phase(uvm_phase phase);
   extern function void write(sequence_item t);
endclass: predictor_matlab

function predictor_matlab::new(string name, uvm_component parent);
   super.new(name,parent);
endfunction: new

function void predictor_matlab::build_phase(uvm_phase phase);
   data_out_ap = new("data_out_export",this);
   void'(qmw_hdl2matlab::qmw_sendCmd("clear scr_nuevo")); //I do this to clear persistent matlab variables
endfunction : build_phase

function void predictor_matlab::write(T t);
   sequence_item predicted;
   
   string msg, cmd, cmd_rsp;

   predicted = sequence_item::type_id::create("predicted");
   //t is the input sequence(Transaction)
   predicted.do_copy(t);
   
   $sformat(msg, "%s",t.convert2string());
   `uvm_info(get_name(),msg, UVM_HIGH);

 $sformat(cmd,"X = scr_nuevo(%d,%d)",t.d_in,t.d_out);
   `uvm_info(get_name(), cmd, UVM_HIGH);
   // Call our MATLAB function with our transaction inputs
   void'(qmw_hdl2matlab::qmw_sendCmd(cmd));
   
   // Read the result from Matlab   
   qmw_hdl2matlab::getIntValue("X",predicted.d_out);

   data_out_ap.write(predicted);
endfunction: write

However I would like to know why the testbench breaks with that $fatal error under certain number of transactions.

Thank you,
Antonio